SNAS500Q May   2010  – May 2017 ADC12D1800

PRODUCTION DATA.  

  1. 1 Device Overview
    1. 1.1 Features
    2. 1.2 Applications
    3. 1.3 Description
    4. 1.4 Functional Block Diagram
  2. 2 Revision History
  3. 3 Pin Configuration and Functions
    1. 3.1 Pin Attributes
  4. 4 Specifications
    1. 4.1  Absolute Maximum Ratings
    2. 4.2  ESD Ratings
    3. 4.3  Recommended Operating Conditions
    4. 4.4  Thermal Information
    5. 4.5  Converter Electrical Characteristics: Static Converter Characteristics
    6. 4.6  Converter Electrical Characteristics: Dynamic Converter Characteristics
    7. 4.7  Converter Electrical Characteristics: Analog Input and Output and Reference Characteristics
    8. 4.8  Converter Electrical Characteristics: I-Channel to Q-Channel Characteristics
    9. 4.9  Converter Electrical Characteristics: Sampling Clock Characteristics
    10. 4.10 Converter Electrical Characteristics: AutoSync Feature Characteristics
    11. 4.11 Converter Electrical Characteristics: Digital Control and Output Pin Characteristics
    12. 4.12 Converter Electrical Characteristics: Power Supply Characteristics
    13. 4.13 Converter Electrical Characteristics: AC Electrical Characteristics
    14. 4.14 Converter Timing Requirements: Serial Port Interface
    15. 4.15 Converter Switching Characteristics: Calibration
    16. 4.16 Typical Characteristics
  5. 5 Detailed Description
    1. 5.1 Overview
    2. 5.2 Functional Block Diagram
    3. 5.3 Feature Description
      1. 5.3.1 Input Control and Adjust
        1. 5.3.1.1 AC/DC-coupled Mode
        2. 5.3.1.2 Input Full-Scale Range Adjust
        3. 5.3.1.3 Input Offset Adjust
        4. 5.3.1.4 DES Timing Adjust
        5. 5.3.1.5 Sampling Clock Phase (Aperture) Delay Adjust
      2. 5.3.2 Output Control and Adjust
        1. 5.3.2.1 DDR Clock Phase
        2. 5.3.2.2 LVDS Output Differential Voltage
        3. 5.3.2.3 LVDS Output Common-Mode Voltage
        4. 5.3.2.4 Output Formatting
        5. 5.3.2.5 Test Pattern Mode
        6. 5.3.2.6 Time Stamp
      3. 5.3.3 Calibration Feature
        1. 5.3.3.1 Calibration Control Pins and Bits
        2. 5.3.3.2 How to Execute a Calibration
        3. 5.3.3.3 Power-on Calibration
        4. 5.3.3.4 On-Command Calibration
        5. 5.3.3.5 Calibration Adjust
        6. 5.3.3.6 Read/Write Calibration Settings
        7. 5.3.3.7 Calibration and Power-Down
        8. 5.3.3.8 Calibration and the Digital Outputs
      4. 5.3.4 Power Down
    4. 5.4 Device Functional Modes
      1. 5.4.1 DES/Non-DES Mode
      2. 5.4.2 Demux/Non-Demux Mode
    5. 5.5 Programming
      1. 5.5.1 Control Modes
        1. 5.5.1.1 Non-Extended Control Mode
          1. 5.5.1.1.1  Dual Edge Sampling Pin (DES)
          2. 5.5.1.1.2  Non-Demultiplexed Mode Pin (NDM)
          3. 5.5.1.1.3  Dual Data Rate Phase Pin (DDRPh)
          4. 5.5.1.1.4  Calibration Pin (CAL)
          5. 5.5.1.1.5  Calibration Delay Pin (CalDly)
          6. 5.5.1.1.6  Power Down I-channel Pin (PDI)
          7. 5.5.1.1.7  Power Down Q-channel Pin (PDQ)
          8. 5.5.1.1.8  Test Pattern Mode Pin (TPM)
          9. 5.5.1.1.9  Full-Scale Input Range Pin (FSR)
          10. 5.5.1.1.10 AC/DC-Coupled Mode Pin (VCMO)
          11. 5.5.1.1.11 LVDS Output Common-mode Pin (VBG)
        2. 5.5.1.2 Extended Control Mode
          1. 5.5.1.2.1 Serial Interface
    6. 5.6 Register Maps
      1. 5.6.1 Register Definitions
  6. 6 Application and Implementation
    1. 6.1 Application Information
      1. 6.1.1 Analog Inputs
        1. 6.1.1.1 Acquiring the Input
        2. 6.1.1.2 Driving the ADC in DES Mode
        3. 6.1.1.3 FSR and the Reference Voltage
        4. 6.1.1.4 Out-of-Range Indication
        5. 6.1.1.5 Maximum Input Range
        6. 6.1.1.6 AC-Coupled Input Signals
        7. 6.1.1.7 DC-Coupled Input Signals
        8. 6.1.1.8 Single-Ended Input Signals
      2. 6.1.2 Clock Inputs
        1. 6.1.2.1 CLK Coupling
        2. 6.1.2.2 CLK Frequency
        3. 6.1.2.3 CLK Level
        4. 6.1.2.4 CLK Duty Cycle
        5. 6.1.2.5 CLK Jitter
        6. 6.1.2.6 CLK Layout
      3. 6.1.3 LVDS Outputs
        1. 6.1.3.1 Common-mode and Differential Voltage
        2. 6.1.3.2 Output Data Rate
        3. 6.1.3.3 Terminating Unused LVDS Output Pins
      4. 6.1.4 Synchronizing Multiple ADC12D1800S in a System
        1. 6.1.4.1 AutoSync Feature
        2. 6.1.4.2 DCLK Reset Feature
      5. 6.1.5 Recommended System Chips
        1. 6.1.5.1 Temperature Sensor
        2. 6.1.5.2 Clocking Device
        3. 6.1.5.3 Amplifiers for Analog Input
        4. 6.1.5.4 Balun Recommendations for Analog Input
    2. 6.2 Typical Application
      1. 6.2.1 Design Requirements
      2. 6.2.2 Detailed Design Procedure
      3. 6.2.3 Application Curves
  7. 7 Power Supply Recommendations
    1. 7.1 System Power-on Considerations
      1. 7.1.1 Power-on, Configuration, and Calibration
      2. 7.1.2 Power-on and Data Clock (DCLK)
  8. 8 Layout
    1. 8.1 Layout Guidelines
      1. 8.1.1 Power Planes
      2. 8.1.2 Bypass Capacitors
      3. 8.1.3 Ground Planes
      4. 8.1.4 Power System Example
    2. 8.2 Layout Example
    3. 8.3 Thermal Management
  9. 9 Device and Documentation Support
    1. 9.1 Device Support
      1. 9.1.1 Third-Party Products Disclaimer
      2. 9.1.2 Specification Definitions
    2. 9.2 Documentation Support
      1. 9.2.1 Related Documentation
    3. 9.3 Community Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  10. 10Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

4 Specifications

4.1 Absolute Maximum Ratings

(see (1)(2))
MIN MAX UNIT
Supply voltage (VA, VTC, VDR, VE) 2.2 V
Supply difference
max(VA/TC/DR/E) − min(VA/TC/DR/E)		 0 100 mV
Voltage on any input pin
(except VIN±)		 −0.15 (VA + 0.15) V
VIN± voltage range –0.5 2.5 V
Ground difference
max(GNDTC/DR/E) -min(GNDTC/DR/E)		 0 100 mV
Input current at any pin(3) –50 50 mA
ADC12D1800 package power dissipation at TA ≤ 65°C(3) 4.95 W
Storage temperature, Tstg –65 150 °C
(1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. There is no specification of operation at the Absolute Maximum Ratings. Section 4.3 indicates conditions for which the device is functional, but do not ensure specific performance limits. For ensured specifications and test conditions, see the Electrical Characteristics. The ensured specifications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated under the listed test conditions.
(2) All voltages are measured with respect to GND = GNDTC = GNDDR = GNDE = 0V, unless otherwise specified.
(3) When the input voltage at any pin exceeds the power supply limits (for example, less than GND or greater than VA), the current at that pin should be limited to 50 mA. In addition, over-voltage at a pin must adhere to the maximum voltage limits. Simultaneous over-voltage at multiple pins requires adherence to the maximum package power dissipation limits. These dissipation limits are calculated using JEDEC JESD51-7 thermal model. Higher dissipation may be possible based on specific customer thermal situation and specified package thermal resistances from junction to case.

4.2 ESD Ratings

VALUE UNIT
V(ESD) Electrostatic discharge Human body model (HBM), per ANSI/ESDA/JEDEC JS-001(1) ±2500 V
Charged device model (CDM), per JEDEC specification JESD22-C101(2) ±1000
Machine model (MM) ±250
(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
(2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.

4.3 Recommended Operating Conditions

(see (1)(2))
MIN MAX UNIT
Ambient temperature range TA ADC12D1800
(Standard JEDEC thermal model)		 −40 50 °C
TA ADC12D1800
(Enhanced thermal model/heatsink)		 −40 85 °C
TJ Junction temperature range (applies only to maximum operating speed) 120 °C
Supply voltage (VA, VTC, VE) +1.8 +2.0 V
Driver supply voltage (VDR) +1.8 VA V
VIN+/- Voltage range(3) –0.4 2.4
(DC-coupled) 		V
VIN+/- Differential voltage range(4) 1.0 (DC-coupled at 100% duty cycle)
2.0 (DC-coupled at 20% duty cycle)
2.8 (DC-coupled at 10% duty cycle)		 V
VIN+/- Current range(3) –50 ±50 peak
(A.C.-coupled)		 mA
VIN+/- Power (maintaining common mode voltage,
A.C.-coupled)		 15.3 dBm
(not maintaining common mode voltage,
A.C.-coupled)		 17.1
Ground difference
 max(GNDTC/DR/E) – min(GNDTC/DR/E)		 0 V
CLK+/- Voltage range 0 VA V
Differential CLK amplitude VP–P 0.4 2 V
Common mode input voltage VCMI VCMO - 150 VCMO + 150 mV
(1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. There is no specification of operation at the Absolute Maximum Ratings. Section 4.3 indicates conditions for which the device is functional, but do not ensure specific performance limits. For ensured specifications and test conditions, see the Electrical Characteristics. The ensured specifications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated under the listed test conditions.
(2) All voltages are measured with respect to GND = GNDTC = GNDDR = GNDE = 0V, unless otherwise specified.
(3) Proper common mode voltage must be maintained to ensure proper output codes, especially during input overdrive.
(4) This rating is intended for DC-coupled applications; the voltages listed may be safely applied to VIN+/- for the life-time duty-cycle of the part.

4.4 Thermal Information

THERMAL METRIC(1) ADC12D1800 UNIT
NXA (BGA)
292 PINS
RθJA Junction-to-ambient thermal resistance 16 °C/W
RθJC(top) Junction-to-case (top) thermal resistance 2.9 °C/W
RθJC(bot) Junction-to-case (bottom) thermal resistance 2.5 °C/W
(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report, SPRA953.

4.5 Converter Electrical Characteristics: Static Converter Characteristics

Unless otherwise specified, the following apply after calibration for VA = VDR = VTC = VE = +1.9V; I- and Q-channels, AC-coupled, unused channel terminated to AC ground, FSR Pin = High; CL = 10 pF; Differential, AC coupled Sine Wave Sampling Clock, fCLK = 1.8 GHz at 0.5 VP-P with 50% duty cycle (as specified); VBG = Floating; Extended Control Mode with Register 6h written to 1C00h; Rext = Rtrim = 3300Ω ± 0.1%; Analog Signal Source Impedance = 100Ω Differential; 1:2 Demultiplex Non-DES Mode; Duty Cycle Stabilizer on. Max limits are TA = TMIN to TMAX, TJ < 105°C, unless otherwise noted.(1) (2)(3)
PARAMETER TEST CONDITIONS TYP MAX UNIT
Resolution with no missing codes TA = TMIN to TMAX, TJ < 105°C 12 bits
INL Integral non-linearity
(Best fit)		 1 MHz DC-coupled over-ranged sine wave ±2.5 LSB
DNL Differential non-linearity 1 MHz DC-coupled over-ranged sine wave ±0.4 LSB
VOFF Offset error 5 LSB
VOFF_ADJ Input offset adjustment range Extended Control Mode ±45 mV
PFSE Positive full-scale error See (4) ±25 mV
NFSE Negative full-scale error See (4) ±25 mV
Out-of-range output code (5) (VIN+) − (VIN−) > + full scale 4095
(VIN+) − (VIN−) < − full scale 0
(1) The analog inputs, labeled I/O, are protected as shown below. Input voltage magnitudes beyond the Absolute Maximum Ratings may damage this device.

ADC12D1800 30123204.gif
(2) To ensure accuracy, it is required that VA, VTC, VE and VDR be well-bypassed. Each supply pin must be decoupled with separate bypass capacitors.
(3) Typical figures are at TA = 25°C, and represent most likely parametric norms. Test limits are specified to TI's AOQL (Average Outgoing Quality Level).
(4) Calculation of Full-Scale Error for this device assumes that the actual reference voltage is exactly its nominal value. Full-Scale Error for this device, therefore, is a combination of Full-Scale Error and Reference Voltage Error. See Figure 4-1. For relationship between Gain Error and Full-Scale Error, see Specification Definitions for Gain Error.
(5) This parameter is ensured by design and is not tested in production.

4.6 Converter Electrical Characteristics: Dynamic Converter Characteristics

Limits are TA = TMIN to TMAX, TJ < 105°C
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
FPBW Full power bandwidth Non-DES Mode 2.8 GHz
DESI, DESQ Mode 1.25 GHz
DESIQ Mode 1.75 GHz
Gain flatness Non-DES Mode D.C. to Fs/2 0.5 dB
D.C. to Fs 1.2 dB
DESI, DESQ Mode D.C. to Fs/2 4.0 dB
DESIQ Mode D.C. to Fs/2 3.6 dB
CER Code error rate 10-18 Error/Sample
NPR Noise power ratio See (1) 48.5 dB
IMD3 3rd order intermodulation distortion DESIQ Mode
FIN1 = 1212.52MHz at -7dBFS
FIN2 = 1217.52 MHz at -7dBFS 		-61 dBFS
-54 dBc
Noise floor density 50Ω single-ended termination, DES Mode -153.5 dBm/Hz
-152.5 dBFS/Hz
Wideband input, DES Mode(2) -152.6 dBm/Hz
-151.6 dBFS/Hz
NON-DES MODE(3)(4)
ENOB Effective Number of Bits AIN = 125 MHz at -0.5 dBFS 9.4 bits
AIN = 248 MHz at -0.5 dBFS 8.4 9.2 bits
AIN = 498 MHz at -0.5 dBFS 8.4 9.1 bits
AIN = 1147 MHz at -0.5 dBFS 8.5 bits
AIN = 1448 MHz at -0.5 dBFS 8.4 bits
SINAD Signal-to-Noise Plus Distortion Ratio AIN = 125 MHz at -0.5 dBFS 58 dB
AIN = 248 MHz at -0.5 dBFS 52.1 57.3 dB
AIN = 498 MHz at -0.5 dBFS 52.1 56.3 dB
AIN = 1147 MHz at -0.5 dBFS 52.9 dB
AIN = 1448 MHz at -0.5 dBFS 52.5 dB
SNR Signal-to-Noise Ratio AIN = 125 MHz at -0.5 dBFS 58.6 dB
AIN = 248 MHz at -0.5 dBFS 52.9 57.8 dB
AIN = 498 MHz at -0.5 dBFS 52.9 57.3 dB
AIN = 1147 MHz at -0.5 dBFS 53.9 dB
AIN = 1448 MHz at -0.5 dBFS 53.1 dB
THD Total Harmonic Distortion AIN = 125 MHz at -0.5 dBFS -68.5 dB
AIN = 248 MHz at -0.5 dBFS -60 -66.6 dB
AIN = 498 MHz at -0.5 dBFS -60 -63.2 dB
AIN = 1147 MHz at -0.5 dBFS -59.5 dB
AIN = 1448 MHz at -0.5 dBFS -61.1 dB
2nd Harm Second Harmonic Distortion AIN = 125 MHz at -0.5 dBFS 73 dBc
AIN = 248 MHz at -0.5 dBFS 87 dBc
AIN = 498 MHz at -0.5 dBFS 70 dBc
AIN = 1147 MHz at -0.5 dBFS 62 dBc
AIN = 1448 MHz at -0.5 dBFS 66 dBc
3rd Harm Third Harmonic Distortion AIN = 125 MHz at -0.5 dBFS 76.8 dBc
AIN = 248 MHz at -0.5 dBFS 67.4 dBc
AIN = 498 MHz at -0.5 dBFS 66.3 dBc
AIN = 1147 MHz at -0.5 dBFS 63 dBc
AIN = 1448 MHz at -0.5 dBFS 63.6 dBc
SFDR Spurious-Free Dynamic Range AIN = 125 MHz at -0.5 dBFS 73 dBc
AIN = 248 MHz at -0.5 dBFS 67.5 58 dBc
AIN = 498 MHz at -0.5 dBFS 66.1 58 dBc
AIN = 1147 MHz at -0.5 dBFS 60.2 dBc
AIN = 1448 MHz at -0.5 dBFS 60.3 dBc
DES MODE(3)(4) (5)
ENOB Effective number of bits AIN = 125 MHz at -0.5 dBFS 8.9 bits
AIN = 248 MHz at -0.5 dBFS 8.8 8.4 bits
AIN = 498 MHz at -0.5 dBFS 8.6 bits
AIN = 1147 MHz at -0.5 dBFS 8 bits
AIN = 1448 MHz at -0.5 dBFS 8 bits
SINAD Signal-to-noise plus distortion ratio AIN = 125 MHz at -0.5 dBFS 55.6 dB
AIN = 248 MHz at -0.5 dBFS 54.8 52.1 dB
AIN = 498 MHz at -0.5 dBFS 53.8 dB
AIN = 1147 MHz at -0.5 dBFS 50 dB
AIN = 1448 MHz at -0.5 dBFS 49.8 dB
SNR Signal-to-noise ratio AIN = 125 MHz at -0.5 dBFS 55.8 dB
AIN = 248 MHz at -0.5 dBFS 55.3 52.9 dB
AIN = 498 MHz at -0.5 dBFS 54.5 dB
AIN = 1147 MHz at -0.5 dBFS 50.4 dB
AIN = 1448 MHz at -0.5 dBFS 50.1 dB
THD Total harmonic distortion AIN = 125 MHz at -0.5 dBFS -67.8 dB
AIN = 248 MHz at -0.5 dBFS -65 -60 dB
AIN = 498 MHz at -0.5 dBFS -62 dB
AIN = 1147 MHz at -0.5 dBFS -60.6 dB
AIN = 1448 MHz at -0.5 dBFS -61.9 dB
2nd Harm Second harmonic distortion AIN = 125 MHz at -0.5 dBFS 78 dBc
AIN = 248 MHz at -0.5 dBFS 74.4 dBc
AIN = 498 MHz at -0.5 dBFS 72.5 dBc
AIN = 1147 MHz at -0.5 dBFS 70.5 dBc
AIN = 1448 MHz at -0.5 dBFS 72.8 dBc
3rd Harm Third harmonic distortion AIN = 125 MHz at -0.5 dBFS 72.6 dBc
AIN = 248 MHz at -0.5 dBFS 66.5 dBc
AIN = 498 MHz at -0.5 dBFS 63.2 dBc
AIN = 1147 MHz at -0.5 dBFS 61.8 dBc
AIN = 1448 MHz at -0.5 dBFS 63.8 dBc
SFDR Spurious-free dynamic range AIN = 125 MHz at -0.5 dBFS 58.9 dBc
AIN = 248 MHz at -0.5 dBFS 60.4 58 dBc
AIN = 498 MHz at -0.5 dBFS 60.5 dBc
AIN = 1147 MHz at -0.5 dBFS 56.7 dBc
AIN = 1448 MHz at -0.5 dBFS 55.6 dBc
(1) The NPR was measured using an Agilent N6030A Arbitrary Waveform Generator (ARB) to generate the input signal. See the Wideband Performance for an example spectrum. The "noise" portion of the signal was created by tones spaced at 500 kHz and the "notch" was a 25 MHz absence of tones centered at 320 MHz. The bandwidth of this equipment is only 500 MHz, so the final reported NPR was extrapolated from the measured NPR as if the entire Nyquist band were occupied with noise.
(2) The Noise Floor Density was measured for two conditions: the analog input terminated with 50Ω, and in the presence of a 500 MHz wideband noise signal with total power just below the maximum input level to the ADC. In both cases, the spurs at DC, Fs/4 and Fs/2 were not included in the noise floor calculation. The power over the entire Nyquist band (except for the noise signal) was integrated and the average number is reported.
(3) The Dynamic Specifications are ensured for room to hot ambient temperature only (25°C to 85°C). Refer to the plots of the dynamic performance vs. temperature in the Typical Performance Plots to see typical performance from cold to room temperature (-40°C to 25°C).
(4) The Fs/2 spur was removed from all the dynamic performance specifications.
(5) These measurements were taken in Extended Control Mode (ECM) with the DES Timing Adjust feature enabled (Addr: 7h). This feature is used to reduce the interleaving timing spur amplitude, which occurs at fs/2-fin, and thereby increase the SFDR, SINAD and ENOB.

4.7 Converter Electrical Characteristics: Analog Input and Output and Reference Characteristics

Limits are TA = TMIN to TMAX, TJ < 105°C
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
ANALOG INPUTS
VIN_FSR Analog differential input full scale range Non-Extended Control Mode FSR Pin High 740 800 860 mVP-P
Extended Control Mode FM(14:0) = 4000h (default) 800 mVP-P
FM(14:0) = 7FFFh 1000 mVP-P
CIN Analog input capacitance, non-DES mode (1) (2) Differential 0.02 pF
Each input pin to ground 1.6 pF
Analog input capacitance, DES mode (1) (2) Differential 0.08 pF
Each input pin to ground 2.2 pF
RIN Differential input resistance 91 100 109 Ω
COMMON MODE OUTPUT
VCMO Common mode output voltage ICMO = ±100 µA 1.15 1.25 1.35 V
TC_VCMO Common mode output voltage temperature coefficient ICMO = ±100 µA 38 ppm/°C
VCMO_LVL VCMO input threshold to set
DC-coupling Mode		 0.63 V
CL_VCMO Maximum VCMO load capacitance  (1) 80 pF
BANDGAP REFERENCE
VBG Bandgap reference output voltage IBG = ±100 µA 1.15 1.25 1.35 V
TC_VBG Bandgap reference voltage temperature coefficient IBG = ±100 µA 32 ppm/°C
CL_VBG Maximum bandgap reference load capacitance  (1) 80 pF
(1) This parameter is ensured by design and is not tested in production.
(2) The differential and pin-to-ground input capacitances are lumped capacitance values from design; they are defined as shown below.

ADC12D1800 30123295.gif

4.8 Converter Electrical Characteristics: I-Channel to Q-Channel Characteristics

PARAMETER TEST CONDITIONS TYP LIM UNIT
Offset match 2 LSB
Positive full-scale match Zero offset selected in
Control Register		 2 LSB
Negative full-scale match Zero offset selected in
Control Register		 2 LSB
Phase matching (I, Q) fIN = 1.0 GHz < 1 Degree
X-TALK Crosstalk from I-channel (Aggressor) to Q-channel (Victim) Aggressor = 867 MHz F.S.
Victim = 100 MHz F.S.		 −70 dB
Crosstalk from Q-channel (Aggressor) to I-channel (Victim) Aggressor = 867 MHz F.S.
Victim = 100 MHz F.S.		 −70 dB

4.9 Converter Electrical Characteristics: Sampling Clock Characteristics

Limits are TA = TMIN to TMAX, TJ < 105°C
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
VIN_CLK Differential sampling clock input level (1) Sine wave clock
Differential Peak-to-peak		 0.4 0.6 2.0 VP-P
Square wave clock
Differential peak-to-peak		 0.4 0.6 2.0 VP-P
CIN_CLK Sampling clock input capacitance
(2)		 Differential 0.1 pF
Each input to ground 1 pF
RIN_CLK Sampling clock differential input resistance 100 Ω
(1) This parameter is ensured by design and/or characterization and is not tested in production.
(2) This parameter is ensured by design and is not tested in production.

4.10 Converter Electrical Characteristics: AutoSync Feature Characteristics

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
VIN_RCLK Differential RCLK input level Differential peak-to-peak 360 mVP-P
CIN_RCLK RCLK input capacitance Differential 0.1 pF
Each input to ground 1 pF
RIN_RCLK RCLK differential input resistance 100 Ω
IIH_RCLK Input leakage current;
VIN = VA		 22 µA
IIL_RCLK Input leakage current;
VIN = GND		 -33 µA
VO_RCOUT Differential RCOut Output Voltage 360 mV

4.11 Converter Electrical Characteristics: Digital Control and Output Pin Characteristics

Limits are TA = TMIN to TMAX, TJ < 105°C
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
DIGITAL CONTROL PINS (DES, CalDly, CAL, PDI, PDQ, TPM, NDM, FSR, DDRPh, ECE, SCLK, SDI, SCS)
VIH Logic high input voltage 0.7×VA 0.3×VA V
VIL Logic low input voltage
IIH Input leakage current;
VIN = VA		 0.02 μA
IIL Input leakage current;
VIN = GND		 FSR, CalDly, CAL, NDM, TPM, DDRPh, DES -0.02 μA
SCS, SCLK, SDI -17 μA
PDI, PDQ, ECE -38 μA
CIN_DIG Digital control pin input capacitance (1) Measured from each control pin to GND 1.5 pF
DIGITAL OUTPUT PINS (Data, DCLKI, DCLKQ, ORI, ORQ)
VOD LVDS differential output voltage VBG = Floating, OVS = High 400 630 800 mVP-P
VBG = Floating, OVS = Low 230 460 630 mVP-P
VBG = VA, OVS = High 670 mVP-P
VBG = VA, OVS = Low 500 mVP-P
ΔVO DIFF Change in LVDS output swing between logic levels ±1 mV
VOS Output offset voltage VBG = Floating 0.8 V
VBG = VA 1.2 V
ΔVOS Output offset voltage change between logic levels ±1 mV
IOS Output short circuit current VBG = Floating;
D+ and D− connected to 0.8V		 ±4 mA
ZO Differential output impedance 100 Ω
VOH Logic high output level CalRun, IOH = −100 µA, (2)
SDO, IOH = −400 µA (2)		 1.65 V
VOL Logic low output level CalRun, IOL = 100 µA, (2)
SDO, IOL = 400 µA (2)		 0.15 V
DIFFERENTIAL DCLK RESET PINS (DCLK_RST)
VCMI_DRST DCLK_RST common mode input voltage 1.25 V
VID_DRST Differential DCLK_RST input voltage VIN_CLK VP-P
RIN_DRST Differential DCLK_RST input resistance  (1) 100 Ω
(1) This parameter is ensured by design and is not tested in production.
(2) This parameter is ensured by design and/or characterization and is not tested in production.

4.12 Converter Electrical Characteristics: Power Supply Characteristics

Limits are TA = TMIN to TMAX, TJ < 105°C
PARAMETER TEST CONDITIONS TYP MAX UNIT
IA Analog supply current PDI = PDQ = Low 1345 mA
PDI = Low; PDQ = High 730 mA
PDI = High; PDQ = Low 730 mA
PDI = PDQ = High 15 mA
ITC Track-and-hold and clock supply current PDI = PDQ = Low 495 mA
PDI = Low; PDQ = High 295 mA
PDI = High; PDQ = Low 295 mA
PDI = PDQ = High 4 mA
IDR Output driver supply current PDI = PDQ = Low 330 mA
PDI = Low; PDQ = High 175 mA
PDI = High; PDQ = Low 175 mA
PDI = PDQ = High 3 mA
IE Digital encoder supply current PDI = PDQ = Low 165 mA
PDI = Low; PDQ = High 85 mA
PDI = High; PDQ = Low 85 mA
PDI = PDQ = High 1 mA
ITOTAL Total supply current 1:2 Demux Mode
PDI = PDQ = Low		 2335 2481 mA
Non-Demux Mode
PDI = PDQ = Low		 2200 mA
PC Power consumption 1:2 Demux Mode PDI = PDQ = Low 4.44 4.7 W
PDI = Low; PDQ = High 2.44 W
PDI = High; PDQ = Low 2.44 W
PDI = PDQ = High 43.7 mW
Non-Demux Mode PDI = PDQ = Low 4.18 W

4.13 Converter Electrical Characteristics: AC Electrical Characteristics

Limits are TA = TMIN to TMAX, TJ < 105°C
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
SAMPLING CLOCK (CLK)
fCLK (max) Maximum sampling clock frequency 1.8 GHz
fCLK (min) Minimum sampling clock frequency Non-DES Mode; LFS = 0b 300 MHz
Non-DES Mode; LFS = 1b 150 MHz
DES Mode 500 MHz
Sampling clock duty cycle fCLK(min) ≤ fCLK ≤ fCLK(max)(1) 20% 50% 80%
tCL Sampling clock low time See (2) 111 278 ps
tCH Sampling clock high time See (2) 111 278 ps
DATA CLOCK (DCLKI, DCLKQ)
DCLK duty cycle See (2) 45% 50% 55%
tSR Setup time DCLK_RST± See (1) 45 ps
tHR Hold time DCLK_RST± See (1) 45 ps
tPWR Pulse width DCLK_RST± See (2) 5 Sampling clock cycles
tSYNC_DLY DCLK synchronization delay 90° Mode(2) 4 Sampling clock cycles
0° Mode(2) 5
tLHT Differential low-to-high transition time 10%-to-90%, CL = 2.5 pF 200 ps
tHLT Differential high-to-low transition time 10%-to-90%, CL = 2.5 pF 200 ps
tSU Data-to-DCLK setup time 90° Mode(2) 430 ps
tH DCLK-to-data hold time 90° Mode(2) 430 ps
tOSK DCLK-to-data output skew 50% of DCLK transition to 50% of Data transition(2) ±50 ps
DATA INPUT-TO-OUTPUT
tAD Aperture delay Sampling CLK+ rise to acquisition of data 1.15 ns
tAJ Aperture jitter 0.2 ps (rms)
tOD Sampling clock-to data output delay (in addition to latency) 50% of sampling clock transition to 50% of data transition 3.2 ns
tLAT Latency in 1:2 Demux non-DES mode(2) DI, DQ outputs 34 Sampling clock cycles
DId, DQd outputs 35
Latency in 1:4 Demux DES mode(2) DI outputs 34
DQ outputs 34.5
DId outputs 35
DQd outputs 35.5
Latency in non-Demux non-DES mode(2) DI outputs 34
DQ outputs 34
Latency in non-Demux DES mode(2) DI outputs 34
DQ Outputs 34.5
tORR Over range recovery time Differential VIN step from ±1.2V to 0V to accurate conversion 1 Sampling clock cycle
tWU Wake-up time (PDI/PDQ low to rated accuracy conversion) Non-DES Mode(2) 500 ns
DES Mode(2) 1 µs
(1) This parameter is ensured by design and/or characterization and is not tested in production.
(2) This parameter is ensured by design and is not tested in production.

4.14 Converter Timing Requirements: Serial Port Interface

Limits are TA = TMIN to TMAX, TJ < 105°C
MIN NOM MAX UNIT
fSCLK Serial clock frequency (1) 15 MHz
Serial clock low time 30 ns
Serial clock high time 30 ns
tSSU Serial data-to-serial clock rising setup time (1) 2.5 ns
tSH Serial data-to-serial clock rising hold time (1) 1 ns
tSCS SCS-to-serial clock rising setup time 2.5 ns
tHCS SCS-to-serial clock falling hold time 1.5 ns
tBSU Bus turn-around time 10 ns
(1) This parameter is ensured by design and is not tested in production.

4.15 Converter Switching Characteristics: Calibration

Limits are TA = TMIN to TMAX, TJ < 105°C
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
tCAL Calibration cycle time Non-ECM 5.2·107 Sampling clock cycles
ECM CSS = 0b
ECM CSS = 1b
tCAL_L CAL pin low time See (1) 1280 Sampling clock cycles
tCAL_H CAL pin high time See (1) 1280
tCalDly Calibration delay determined by CalDly pin(1) CalDly = low 224 Sampling clock cycles
CalDly = high 230
(1) This parameter is ensured by design and is not tested in production.
ADC12D1800 30123222.gif Figure 4-1 Input / Output Transfer Characteristic
ADC12D1800 30123259.gif
The timing for these figures is shown for the one input only (I or Q). However, both I- and Q-inputs may be used. For this case, the I-channel functions precisely the same as the Q-channel, with VinI, DCLKI, DId and DI instead of VinQ, DCLKQ, DQd and DQ. Both I- and Q-channel use the same CLK.
Figure 4-2 Clocking in 1:2 Demux Non-DES Mode
ADC12D1800 30123260.gif
The timing for these figures is shown for the one input only (I or Q). However, both I- and Q-inputs may be used. For this case, the I-channel functions precisely the same as the Q-channel, with VinI, DCLKI, DId and DI instead of VinQ, DCLKQ, DQd and DQ. Both I- and Q-channel use the same CLK.
Figure 4-3 Clocking in Non-Demux Non-DES Mode
ADC12D1800 30123299.gif
The timing for these figures is shown for the one input only (I or Q). However, both I- and Q-inputs may be used. For this case, the I-channel functions precisely the same as the Q-channel, with VinI, DCLKI, DId and DI instead of VinQ, DCLKQ, DQd and DQ. Both I- and Q-channel use the same CLK.
Figure 4-4 Clocking in 1:4 Demux DES Mode
ADC12D1800 30123296.gif
The timing for these figures is shown for the one input only (I or Q). However, both I- and Q-inputs may be used. For this case, the I-channel functions precisely the same as the Q-channel, with VinI, DCLKI, DId and DI instead of VinQ, DCLKQ, DQd and DQ. Both I- and Q-channel use the same CLK.
Figure 4-5 Clocking in Non-Demux Mode DES Mode
ADC12D1800 30123220.gif Figure 4-6 Data Clock Reset Timing (Demux Mode)
ADC12D1800 30123225.gif Figure 4-7 Power-on and On-Command Calibration Timing
ADC12D1800 30123219.gif Figure 4-8 Serial Interface Timing

4.16 Typical Characteristics

VA = VDR = VTC = VE = 1.9V, fCLK = 1.8 GHz, fIN = 498 MHz, TA= 25°C, I-channel, 1:2 Demux Non-DES Mode (1:1 Demux Non-DES Mode has similar performance), unless otherwise stated. For NPR plots, notch width = 25 MHz, fc = 320 MHz.

ADC12D1800 30123238.gif Figure 4-9 INL vs. Code (ADC12D1800)
ADC12D1800 30123239.gif Figure 4-11 DNL vs. Code (ADC12D1800)
ADC12D1800 30123276.gif Figure 4-13 ENOB vs. Temperature (ADC12D1800)
ADC12D1800 30123278.gif Figure 4-15 ENOB vs. Clock Frequency (ADC12D1800)
ADC12D1800 30123242.gif Figure 4-17 ENOB vs. VCMI (ADC12D1800)
ADC12D1800 30123269.gif Figure 4-19 SNR vs. Supply Voltage (ADC12D1800)
ADC12D1800 30123271.gif Figure 4-21 SNR vs. Input Frequency (ADC12D1800)
ADC12D1800 30123273.gif Figure 4-23 THD vs. Supply Voltage (ADC12D1800)
ADC12D1800 30123275.gif Figure 4-25 THD vs. Input Frequency (ADC12D1800)
ADC12D1800 30123284.gif Figure 4-27 SFDR vs. Supply Voltage (ADC12D1800)
ADC12D1800 30123283.gif Figure 4-29 SFDR vs. Input Frequency (ADC12D1800)
ADC12D1800 30123288.gif Figure 4-31 Spectral Response at FIN = 498 MHz (ADC12D1800)
ADC12D1800 30123248.gif Figure 4-33 Full Power Bandwidth (ADC12D1800)
ADC12D1800 30123214.gif Figure 4-35 NPR vs. RMS Noise Loading Level (ADC12D1800)
ADC12D1800 30123240.gif Figure 4-10 INL vs. Temperature (ADC12D1800)
ADC12D1800 30123241.gif Figure 4-12 DNL vs. Temperature (ADC12D1800)
ADC12D1800 30123277.gif Figure 4-14 ENOB vs. Supply Voltage (ADC12D1800)
ADC12D1800 30123279.gif Figure 4-16 ENOB vs. Input Frequency (ADC12D1800)
ADC12D1800 30123268.gif Figure 4-18 SNR vs. Temperature (ADC12D1800)
ADC12D1800 30123270.gif Figure 4-20 SNR vs. Clock Frequency (ADC12D1800)
ADC12D1800 30123272.gif Figure 4-22 THD vs. Temperature (ADC12D1800)
ADC12D1800 30123274.gif Figure 4-24 THD vs. Clock Frequency (ADC12D1800)
ADC12D1800 30123285.gif Figure 4-26 SFDR vs. Temperature (ADC12D1800)
ADC12D1800 30123282.gif Figure 4-28 SFDR vs. Clock Frequency (ADC12D1800)
ADC12D1800 30123287.gif Figure 4-30 Spectral Response at FIN = 498 MHz (ADC12D1800)
ADC12D1800 30123263.gif Figure 4-32 Crosstalk vs. Source Frequency (ADC12D1800)
ADC12D1800 30123281.gif Figure 4-34 Power Consumption vs. Clock Frequency (ADC12D1800)