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  • DAC8550 16-bit, Ultra-Low Glitch, Voltage Output Digital-To-Analog Converter

    • SLAS476H March   2006  – June 2017 DAC8550

      PRODUCTION DATA.  

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  • DAC8550 16-bit, Ultra-Low Glitch, Voltage Output Digital-To-Analog Converter
  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Timing Characteristics
    7. 6.7 Typical Characteristics
      1. 6.7.1 VDD = 5 V
      2. 6.7.2 VDD = 2.7 V
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 DAC Section
        1. 7.3.1.1 Resistor String
        2. 7.3.1.2 Output Amplifier
      2. 7.3.2 Power-On Reset
    4. 7.4 Device Functional Modes
      1. 7.4.1 Power-Down Modes
    5. 7.5 Programming
      1. 7.5.1 Serial Interface
      2. 7.5.2 Input Shift Register
      3. 7.5.3 SYNC Interrupt
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Bipolar Operation Using DAC8550
    2. 8.2 Typical Applications
      1. 8.2.1 Loop-Powered 2-Wire 4-mA to 20-mA Transmitter With XTR116
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Application Curves
      2. 8.2.2 Using REF02 as a Power Supply for DAC8550
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
    3. 8.3 System Examples
      1. 8.3.1 Microprocessor Interfacing
        1. 8.3.1.1 DAC8550 to 8051 Interface
        2. 8.3.1.2 DAC8550 to Microwire Interface
        3. 8.3.1.3 DAC8550 to 68HC11 Interface
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Community Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information
  13. IMPORTANT NOTICE

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DATA SHEET

DAC8550 16-bit, Ultra-Low Glitch, Voltage Output Digital-To-Analog Converter

1 Features

  • Relative Accuracy: 8 LSB
  • Glitch Energy: 0.1 nV-s
  • MicroPower Operation: 140 μA at 2.7 V
  • Power-On Reset to Midscale
  • Power Supply: 2.7 V to 5.5 V
  • 16-Bit Monotonic
  • Settling Time: 10 μs to ±0.003% FSR
  • Low-Power Serial Interface with Schmitt-Triggered Inputs
  • On-Chip Output Buffer Amplifier with Rail-to-Rail Output Amplifier
  • Power-Down Capability
  • 2's Complement Input
  • SYNC Interrupt Facility
  • Drop-In Compatible with DAC8531/01 and DAC8551 (Binary Input)
  • Available in a Tiny MSOP-8 Package

2 Applications

  • Process Control
  • Data Acquisition Systems
  • Closed-Loop Servo-Control
  • PC Peripherals
  • Portable Instrumentation
  • Programmable Attenuation

3 Description

The DAC8550 is a small, low-power, voltage output, 16-bit digital-to-analog converter (DAC). It is monotonic, provides good linearity, and minimizes undesired code-to-code transient voltages. The DAC8550 uses a versatile, 3-wire serial interface that operates at clock rates of up to 30 MHz and is compatible with standard SPI™, QSPI™, Microwire™, and digital signal processor (DSP) interfaces.

The DAC8550 requires an external reference voltage to set its output range. The DAC8550 incorporates a power-on reset circuit that ensures that the DAC output powers up at midscale and remains there until a valid write takes place to the device. The DAC8550 contains a power-down feature, accessed over the serial interface, that reduces the current consumption of the device to 200 nA at 5 V.

The low-power consumption of this device in normal operation makes it ideal for portable, battery-operated equipment. Power consumption is 0.38 mW at 2.7 V, reducing to less than 1 μW in power-down mode.

The DAC8550 is available in an MSOP-8 package.

For additional flexibilty, see the DAC8551, a binary-coded counterpart to the DAC8550.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
DAC8550 VSSOP (8) 3.00 mm × 3.00 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Functional Block Diagram

DAC8550 fbd_las476.gif

4 Revision History

Changes from G Revision (February 2017) to H Revision

  • Changed the VIL Test Conditions From: VDD = 5 V To: 3 V ≤ VDD ≤ 5.5 V and From: VDD = 3 V To: 2.7 V ≤ VDD < 3 V in the Electrical CharacteristicsGo
  • Changed the VIH Test Conditions From: VDD = 5 V To: 3 V ≤ VDD ≤ 5.5 V and From: VDD = 3 V To: 2.7 V ≤ VDD < 3 V in the Electrical CharacteristicsGo

Changes from F Revision (March 2016) to G Revision

  • Relative accuracy DAC8550, Deleted the TYP value of ± 3, Changed the MAX value From: ±8 To: ±16 in the Electrical Characteristics Go
  • Relative accuracy DAC8550B, Deleted the TYP value of ± 3, Changed the MAX value From: ±8 To: ±12 in the Electrical Characteristics Go

Changes from E Revision (March 2012) to F Revision

  • Added ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information sectionGo
  • Changed Differential nonlinearity Test Conditions From: 16-bit monotonic To: three separate entries in the Electrical Characteristics Go

Changes from D Revision (October 2006) to E Revision

  • Changed low-level input voltage values in Electrcial CharacteristicsGo
  • Changed high-level input voltage values in Electrcial CharacteristicsGo

Changes from C Revision (March 2006) to D Revision

  • Changed FeaturesGo
  • Changed relative accuracy feature from 8 LSB (Max) to 3 LSBGo
  • Changed micropower operation feature from 200 μA at 5 V to 140 μA at 2.7 VGo
  • Changed power consumption from 1 mW at 5 V to 0.38 mW at 2.7 VGo
  • Changed power-down consumption from 1 mW to less than 1 mW in DescriptionGo
  • Changed relative accuracy for DAC8550 typical value from ±5 to ±3Go
  • Changed reference current input range for VREF = 5 V from 50 to 40Go
  • Deleted reference current included from IDD (normal mode) test conditionsGo
  • Changed IDD (normal mode) typical values from 200 and 180 to 160 and 140Go
  • Changed Timing Diagram and Timing CharacteristicsGo

5 Pin Configuration and Functions

DGK Package
8-Pin VSSOP
Top View
DAC8550 po_msop_las476.gif

Pin Functions

PIN TYPE DESCRIPTION
NAME NO.
VDD 1 PWR Power-supply input
VREF 2 I Reference voltage input
VFB 3 I Feedback connection for the output amplifier
VOUT 4 O Analog output voltage from DAC. The output amplifier has rail-to-rail operation.
SYNC 5 I Level-triggered control input (active LOW). This is the frame synchronization signal for the input data. When SYNC goes LOW, it enables the input shift register and data is transferred in on the falling edges of the following clocks. The DAC is updated following the 24th clock (unless SYNC is taken HIGH before this edge, in which case the rising edge of SYNC acts as an interrupt and the write sequence is ignored by the DAC8550). Schmitt-Trigger logic input.
SCLK 6 I Serial clock input. Data can be transferred at rates up to 30 MHz Schmitt-Trigger logic input.
DIN 7 I Serial data input. Data is clocked into the 24-bit input shift register on each falling edge of the serial clock input. Schmitt-Trigger logic input.
GND 8 GND Ground reference point for all circuitry on the part

6 Specifications

6.1 Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted)(1)
MIN MAX UNIT
Supply voltage GND –0.3 6 V
Digital input voltage range GND –0.3 VDD + 0.3 V
Output voltage GND –0.3 VDD + 0.3 V
Junction temperature, TJ(max) 150 °C
Operating temperature, TA –40 105 °C
Storage temperature, Tstg –65 150 °C
(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

6.2 ESD Ratings

VALUE UNIT
V(ESD) Electrostatic discharge Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001(1) ±2000 V
Charged-device model (CDM), per JEDEC specification JESD22-C101(2) ±500
(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.

6.3 Recommended Operating Conditions

over operating ambient temperature range (unless otherwise noted)
MIN NOM MAX UNIT
POWER SUPPLY
VDD Supply voltage 2.7 5.5 V
DIGITAL INPUTS
DIN Digital input voltage SCLK and SYNC 0 VDD V
REFERENCE INPUT
VREF Reference input voltage 0 VDD V
AMPLIFIER FEEDBACK INPUT
VFB Output amplifier feedback input VO V
TEMPERATURE RANGE
TA Operating ambient temperature –40 105 °C

6.4 Thermal Information

THERMAL METRIC(1) DAC8550 UNIT
DGK (VSSOP)
8 PINS
RθJA Junction-to-ambient thermal resistance 206 °C/W
RθJC(top) Junction-to-case (top) thermal resistance 44 °C/W
RθJB Junction-to-board thermal resistance 94.2 °C/W
ψJT Junction-to-top characterization parameter 10.2 °C/W
ψJB Junction-to-board characterization parameter 92.7 °C/W
(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report.

6.5 Electrical Characteristics

VDD = 2.7 V to 5.5 V, –40°C to 105°C range (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
STATIC PERFORMANCE(1)
Resolution 16 Bits
EL Relative accuracy Measured by line passing through codes –32283 and 32063 at VREF = 5 V, codes –31798 and 31358 at VREF = 2.5 V DAC8550 ±16 LSB
DAC8550B ±12
ED Differential nonlinearity 2.5 V ≤ VREF ≤ 5.5 V, 0°C ≤ TA ≤ 105°C ±1 LSB
4.2 V < VREF ≤ 5.5 V, -40°C ≤ TA ≤ 105°C ±1 LSB
2.5 V ≤ VREF ≤ 4.2 V, -40°C ≤ TA ≤ 0°C ±2 LSB
EO Zero-code error Measured by line passing through codes –32283 and 32063 ±2 ±12 mV
EFS Full-scale error Measured by line passing through codes –32283 and 32063 ±0.05% ±0.5% mV
EG Gain error Measured by line passing through codes –32283 and 32063 ±0.02% ±0.2% mV
Zero-code error drift ±5 μV/°C
Gain temperature coefficient ±1 ppm of FSR/°C
PSRR Power-supply rejection ratio RL = 2 kΩ, CL = 200 pF 0.75 mV/V
OUTPUT CHARACTERISTICS(2)
VO Output voltage range 0 VREF V
tSD Output voltage settling time To ±0.003% FSR, 1200h to 8D00h, RL = 2 kΩ, 0 pF < CL < 200 pF 8 10 μs
RL = 2 kΩ, CL = 500 pF 12
SR Slew rate 1.8 V/μs
Capacitive load stability RL = ∞ 470 pF
RL = 2 kΩ 1000
Code change glitch impulse 1 LSB change around major carry 0.1 nV-s
Digital feedthrough SCLK toggling, FSYNC high 0.1 nV-s
zO DC output impedance At mid-code input 1 Ω
IOS Short-circuit current VDD = 5 V 50 mA
VDD = 3 V 20
tON Power-up time Coming out of power-down mode, VDD = 5 V 2.5 μs
Coming out of power-down mode, VDD = 3 V 5
AC PERFORMANCE
SNR Signal-to-noise ratio BW = 20 kHz, VDD = 5 V, fOUT = 1 kHz,
1st 19 harmonics removed for SNR calculation		 95 dB
THD Total harmonic distortion BW = 20 kHz, VDD = 5 V, fOUT = 1 kHz,
1st 19 harmonics removed for SNR calculation		 –85 dB
SFDR Spurious-free dynamic range BW = 20 kHz, VDD = 5 V, fOUT = 1 kHz,
1st 19 harmonics removed for SNR calculation		 87 dB
SINAD Signal-to-noise and distortion BW = 20 kHz, VDD = 5 V, fOUT = 1 kHz,
1st 19 harmonics removed for SNR calculation		 84 dB
REFERENCE INPUT
VREF Reference voltage 0 VDD V
II(REF) Reference current input range VREF = VDD = 5 V 40 75 μA
VREF = VDD = 3.6 V 30 45
zI(REF) Reference input impedance 125 kΩ
LOGIC INPUTS (2)
Input current ±1 μA
VIL Low-level input voltage 3 V ≤ VDD ≤ 5.5 V 0.3 × VDD V
2.7 V ≤ VDD < 3 V 0.1 × VDD
VIH High-level input voltage 3 V ≤ VDD ≤ 5.5 V 0.7 × VDD V
2.7 V ≤ VDD < 3 V 0.9 × VDD
Pin capacitance 3 pF
POWER REQUIREMENTS
IDD Supply current Normal mode, input code equals mid-scale, no load, does not include reference current, VIH = VDD, VIL = GND VDD = 3.6 V to 5.5 V 160 250 μA
VDD = 2.7 V to 3.6 V 140 240
All power-down modes,
VIH = VDD, VIL = GND		 VDD = 3.6 V to 5.5 V 0.2 2
VDD = 2.7 V to 3.6 V 0.05 2
POWER EFFICIENCY
IOUT/IDD ILOAD = 2 mA, VDD = 5 V 89%
(1) Linearity calculated using a reduced code range –32283 and 32063 at VREF = 5V, codes –31798 and 31358 at VREF = 2.5V; output unloaded, 100mV headroom between reference and supply.
(2) Specified by design and characterization, not production tested.

6.6 Timing Characteristics

VDD = 2.7 V to 5.5 V, all specifications –40°C to 105°C (unless otherwise noted)(1)(2)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
t1(3) SCLK cycle time VDD = 2.7 V to 3.6 V 50 ns
VDD = 3.6 V to 5.5 V 33
t2 SCLK HIGH time VDD = 2.7 V to 3.6 V 13 ns
VDD = 3.6 V to 5.5 V 13
t3 SCLK LOW time VDD = 2.7 V to 3.6 V 22.5 ns
VDD = 3.6 V to 5.5 V 13
t4 SYNC to SCLK rising edge setup time VDD = 2.7 V to 3.6 V 0 ns
VDD = 3.6 V to 5.5 V 0
t5 Data setup time VDD = 2.7 V to 3.6 V 5 ns
VDD = 3.6 V to 5.5 V 5
t6 Data hold time VDD = 2.7 V to 3.6 V 4.5 ns
VDD = 3.6 V to 5.5 V 4.5
t7 24th SCLK falling edge to SYNC rising edge VDD = 2.7 V to 3.6 V 0 ns
VDD = 3.6 V to 5.5 V 0
t8 Minimum SYNC HIGH time VDD = 2.7 V to 3.6 V 50 ns
VDD = 3.6 V to 5.5 V 33
t9 24th SCLK falling edge to SYNC falling edge VDD = 2.7 V to 5.5 V 100 ns
(1) All input signals are specified with tR = tF = 5 ns (10% to 90% of VDD) and timed from a voltage level of (VIL + VIH) / 2.
(2) See Figure 1.
(3) Maximum SCLK frequency is 30 MHz at VDD = 3.6 V to 5.5 V and 20 MHz at VDD = 2.7 V to 3.6 V.
DAC8550 tim_ser_las430.gif Figure 1. Serial Write Operation

6.7 Typical Characteristics

6.7.1 VDD = 5 V

at TA = 25°C, unless otherwise noted

DAC8550 tc_le_5v_40c_las429.gif Figure 2. Linearity Error and Differential Linearity Error
vs Digital Input Code (–40°C)
DAC8550 tc_le_5v_105c_las429.gif Figure 4. Linearity Error and Differential Linearity Error
vs Digital Input Code (105°C)
DAC8550 tc_fse-tmp_5v_las429.gif Figure 6. Full-Scale Error vs Temperature
DAC8550 tc_idd-code_5v_las429.gif Figure 8. Supply Current vs Digital Input Code
DAC8550 tc_idd-vdd_5v_las429.gif Figure 10. Supply Current vs Supply Voltage
DAC8550 tc_idd-logic_5v_las429.gif Figure 12. Supply Current vs Logic Input Voltage
DAC8550 tc_fs_5v_fal_las429.gif
5 V
Figure 14. Full-Scale Settling Time: Falling Edge
DAC8550 tc_hs_5v_fal_las429.gif
5 V
Figure 16. Half-Scale Settling Time: Falling Edge
DAC8550 tc_gl_5v1_fal_las429.gif
5 V 1-LSB Step
Figure 18. Glitch Energy: Falling Edge
DAC8550 tc_gl_5v16_fal_las429.gif
5 V 16-LSB Step
Figure 20. Glitch Energy: Falling Edge
DAC8550 tc_gl_5v256_fal_las429.gif
5 V 256-LSB Step
Figure 22. Glitch Energy: Falling Edge
DAC8550 tc_snr-fout_5v_las429.gif Figure 24. Signal-to-Noise Ratio vs Output Frequency
DAC8550 tc_noise_density_5v_las429.gif Figure 26. Output Noise Density
DAC8550 tc_le_5v_25c_las429.gif Figure 3. Linearity Error and Differential Linearity Error
vs Digital Input Code
DAC8550 tc_zse-tmp_5v_las429.gif Figure 5. Zero-Scale Error vs Temperature
DAC8550 tc_source_sink_5v_las429.gif Figure 7. Source and Sink Current Capability
DAC8550 tc_idd-tmp_5v_las429.gif Figure 9. Power-Supply Current vs Temperature
DAC8550 tc_pd-vdd_5v_las429.gif Figure 11. Power-Down Current vs Supply Voltage
DAC8550 tc_fs_5v_ris_las429.gif
5 V
Figure 13. Full-Scale Settling Time: Rising Edge
DAC8550 tc_hs_5v_ris_las429.gif
5 V
Figure 15. Half-Scale Settling Time: Rising Edge
DAC8550 tc_gl_5v1_ris_las429.gif
5 V 1-LSB Step
Figure 17. Glitch Energy: Rising Edge
DAC8550 tc_gl_5v16_ris_las429.gif
5 V 16-LSB Step
Figure 19. Glitch Energy: Rising Edge
DAC8550 tc_gl_5v256_ris_las429.gif
5 V 256-LSB Step
Figure 21. Glitch Energy: Rising Edge
DAC8550 tc_thd-fout_5v_las429.gif Figure 23. Total Harmonic Distortion vs Output Frequency
DAC8550 tc_power_density_5v_las429.gif Figure 25. Power Spectral Density

6.7.2 VDD = 2.7 V

at TA = 25°C, unless otherwise noted

DAC8550 tc_le_27v_40c_las429.gif Figure 27. Linearity Error and Differential Linearity Error
vs Digital Input Code (–40°C)
DAC8550 tc_le_27v_105c_las429.gif Figure 29. Linearity Error and Differential Linearity Error
vs Digital Input Code (105°C)
DAC8550 tc_le_27v_25c_las429.gif Figure 28. Linearity Error and Differential Linearity Error
vs Digital Input Code
DAC8550 tc_zse-tmp_27v_las429.gif Figure 30. Zero-Scale Error vs Temperature
DAC8550 tc_fse-tmp_27v_las429.gif Figure 31. Full-Scale Error vs Temperature
DAC8550 tc_idd-code_27v_las429.gif Figure 33. Supply Current vs Digital Input Code
DAC8550 tc_idd-logic_27v_las429.gif Figure 35. Supply Current vs Logic Input Voltage
DAC8550 tc_fs_27v_fal_las429.gif
2.7 V
Figure 37. Full-Scale Settling Time: Falling Edge
DAC8550 tc_hs_27v_fal_las429.gif
2.7 V
Figure 39. Half-Scale Settling Time: Falling Edge
DAC8550 tc_gl_27v1_fal_las429.gif
2.7 V 1-LSB Step
Figure 41. Glitch Energy: Falling Edge
DAC8550 tc_gl_27v16_fal_las429.gif
2.7 V 16-LSB Step
Figure 43. Glitch Energy: Falling Edge
DAC8550 tc_gl_27v256_fal_las429.gif
2.7 V 256-LSB Step
Figure 45. Glitch Energy: Falling Edge
DAC8550 tc_source_sink_27v_las429.gif Figure 32. Source and Sink Current Capability
DAC8550 tc_idd-tmp_27v_las429.gif Figure 34. Power-Supply Current vs Temperature
DAC8550 tc_fs_27v_ris_las429.gif
2.7 V
Figure 36. Full-Scale Settling Time: Rising Edge
DAC8550 tc_hs_27v_ris_las429.gif
2.7 V
Figure 38. Half-Scale Settling Time: Rising Edge
DAC8550 tc_gl_27v1_ris_las429.gif
2.7 V 1-LSB Step
Figure 40. Glitch Energy: Rising Edge
DAC8550 tc_gl_27v16_ris_las429.gif
2.7 V 16-LSB Step
Figure 42. Glitch Energy: Rising Edge
DAC8550 tc_gl_27v256_ris_las429.gif
2.7 V 256-LSB Step
Figure 44. Glitch Energy: Rising Edge

 
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