SBAS558C December   2012  – December 2015 ADS42B49

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Description (continued)
  6. 6 ADS424x and ADS422x Family Comparison
  7. 7 Pin Configuration and Functions
  8. 8 Specifications
    1. 8.1  Absolute Maximum Ratings
    2. 8.2  ESD Ratings
    3. 8.3  Recommended Operating Conditions
    4. 8.4  Thermal Information
    5. 8.5  Electrical Characteristics: ADS42B49 (250 MSPS)
    6. 8.6  Electrical Characteristics: General
    7. 8.7  Digital Characteristics
    8. 8.8  Timing Requirements: LVDS and CMOS Modes
    9. 8.9  Serial Interface Timing Characteristics
    10. 8.10 Reset Timing (Only When Serial Interface is Used)
    11. 8.11 LVDS Timings at Lower Sampling Frequencies
    12. 8.12 CMOS Timings at Lower Sampling Frequencies
    13. 8.13 Typical Characteristics
      1. 8.13.1 ADS42B49
      2. 8.13.2 Contour
  9. 9 Parameter Measurement Information
  10. 10Detailed Description
    1. 10.1 Overview
    2. 10.2 Functional Block Diagram
    3. 10.3 Feature Description
      1. 10.3.1 Migrating from the ADS62P49 and ADS4249
      2. 10.3.2 Digital Functions
      3. 10.3.3 Gain for SFDR and SNR Trade-Off
      4. 10.3.4 Offset Correction
    4. 10.4 Device Functional Modes
      1. 10.4.1 Power-Down
        1. 10.4.1.1 Global Power-Down
        2. 10.4.1.2 Channel Standby
        3. 10.4.1.3 Input Clock Stop
      2. 10.4.2 Digital Output Information
        1. 10.4.2.1 Output Interface
        2. 10.4.2.2 DDR LVDS Outputs
        3. 10.4.2.3 LVDS Buffer
        4. 10.4.2.4 Parallel CMOS Interface
        5. 10.4.2.5 CMOS Interface Power Dissipation
        6. 10.4.2.6 Multiplexed Mode of Operation
        7. 10.4.2.7 Output Data Format
      3. 10.4.3 Parallel Configuration Details
    5. 10.5 Programming
      1. 10.5.1 Parallel Configuration Only
      2. 10.5.2 Serial Interface Configuration Only
      3. 10.5.3 Using Both Serial Interface and Parallel Controls
      4. 10.5.4 Serial Interface Details
        1. 10.5.4.1 Register Initialization
        2. 10.5.4.2 Serial Register Readout
    6. 10.6 Register Maps
      1. 10.6.1 Register Description
  11. 11Application and Implementation
    1. 11.1 Application Information
      1. 11.1.1 Driving Circuit
        1. 11.1.1.1 Drive Circuit Requirements
      2. 11.1.2 Clock Input
    2. 11.2 Typical Application
      1. 11.2.1 Design Requirements
      2. 11.2.2 Detailed Design Procedure
        1. 11.2.2.1 Analog Input
        2. 11.2.2.2 Clock Driver
        3. 11.2.2.3 Digital Interface
      3. 11.2.3 Application Curves
  12. 12Power Supply Recommendations
    1. 12.1 Using DC/DC Power Supplies
    2. 12.2 Power Supply Bypassing
  13. 13Layout
    1. 13.1 Layout Guidelines
      1. 13.1.1 Grounding
      2. 13.1.2 Supply Decoupling
      3. 13.1.3 Exposed Pad
      4. 13.1.4 Routing Analog Inputs
    2. 13.2 Layout Example
  14. 14Device and Documentation Support
    1. 14.1 Device Support
      1. 14.1.1 Device Nomenclature
    2. 14.2 Documentation Support
      1. 14.2.1 Related Documentation
    3. 14.3 Community Resources
    4. 14.4 Trademarks
    5. 14.5 Electrostatic Discharge Caution
    6. 14.6 Glossary
  15. 15Mechanical, Packaging, and Orderable Information

パッケージ・オプション

メカニカル・データ（パッケージ｜ピン）
サーマルパッド・メカニカル・データ
発注情報

7 Pin Configuration and Functions

RGC Package(1)
64-Pin VQFN With Exposed Thermal Pad
LVDS Mode - Top View
ADS42B49 po_lvds_bas558.gif
1. The thermal pad is connected to DRGND.

Pin Functions - LVDS Mode

PIN I/O DESCRIPTION
NAME NO.
AGND 17, 18, 21, 24, 27, 28, 31, 32 Input Analog ground
AVDD 16, 22, 33 Input Analog power supply
AVDD_BUF 34 Input Analog buffer supply
CLKM 26 Input Differential clock negative input
CLKP 25 Input Differential clock positive input
CLKOUTM 56 Output Differential output clock, complement
CLKOUTP 57 Output Differential output clock, true
CTRL1 35 Input Digital control input pins.
Together, these pins control the various power-down modes.
CTRL2 36 Input Digital control input pins.
Together, these pins control the various power-down modes.
CTRL3 37 Input Digital control input pins.
Together, these pins control the various power-down modes.
DA0P, DA0M 41, 40 Output Channel A differential output data pair, D0 and D1 multiplexed
DA2P, DA2M 43, 42 Output Channel A differential output data D2 and D3 multiplexed
DA4P, DA4M 45, 44 Output Channel A differential output data D4 and D5 multiplexed
DA6P, DA6M 47, 46 Output Channel A differential output data D6 and D7 multiplexed
DA8P, DA8M 51, 50 Output Channel A differential output data D8 and D9 multiplexed
DA10P, DA10M 53, 52 Output Channel A differential output data D10 and D11 multiplexed
DA12P, DA12M 55, 54 Output Channel A differential output data D12 and D13 multiplexed
DB0P, DB0M 61, 60 Output Channel B differential output data pair, D0 and D1 multiplexed
DB2P, DB2M 63, 62 Output Channel B differential output data D2 and D3 multiplexed
DB4P, DB4M 3, 2 Output Channel B differential output data D4 and D5 multiplexed
DB6P, DB6M 5, 4 Output Channel B differential output data D6 and D7 multiplexed
DB8P, DB8M 7, 6 Output Channel B differential output data D8 and D9 multiplexed
DB10P, DB10M 9, 8 Output Channel B differential output data D10 and D11 multiplexed
DB12P, DB12M 11, 10 Output Channel B differential output data D12 and D13 multiplexed
DRGND 39, 49, 59, PAD Input Output buffer ground, should be shorted on-board to analog ground.
DRVDD 1, 38, 48, 58 Input Output buffer supply
INM_A 30 Input Differential analog negative input, channel A
INP_A 29 Input Differential analog positive input, channel A
INM_B 20 Input Differential analog negative input, channel B
INP_B 19 Input Differential analog positive input, channel B
RESET 12 Input Serial interface RESET input.
When using the serial interface mode, the internal registers must be initialized through a hardware RESET by applying a high pulse on this pin or by using the software reset option; refer to the Serial Interface Configuration section.
In parallel interface mode, the RESET pin must be permanently tied high. SCLK and SEN are used as parallel control pins in this mode. This pin has an internal 150-kΩ pull-down resistor.
SCLK 13 Input This pin functions as a serial interface clock input when RESET is low. SCLK controls the low-speed mode selection when RESET is tied high; see Table 6 for detailed information. This pin has an internal 150-kΩ pull-down resistor.
SDATA 14 Input Serial interface data input; this pin has an internal 150-kΩ pull-down resistor.
SDOUT 64 Output This pin functions as a serial interface register readout when the READOUT bit is enabled. When READOUT = 0, this pin is in high-impedance state.
SEN 15 Input This pin functions as a serial interface enable input when RESET is low. SEN controls the output interface and data format selection when RESET is tied high; see Table 7 for detailed information. This pin has an internal 150-kΩ pull-up resistor to AVDD.
VCM 23 Output This pin outputs the common-mode voltage (1.9 V) that can be used externally to bias the analog input pins
RGC Package(2)
64-Pin VQFN With Exposed Thermal Pad
CMOS Mode - Top View
ADS42B49 po_cmos_bas558.gif
1. The thermal pad is connected to DRGND.

Pin Functions - CMOS Mode

PIN I/O DESCRIPTION
NAME NO.
AGND 17, 18, 21, 24, 27, 28, 31, 32 Input Analog ground
AVDD 16, 22, 33 Input Analog power supply
AVDD_BUF 34 Input Analog buffer supply
CLKM 26 Input Differential clock negative input
CLKP 25 Input Differential clock positive input
CLKOUT 57 Output CMOS output clock
CTRL1 35 Input Digital control input pins. Together, these pins control various power-down modes.
CTRL2 36 Input Digital control input pins. Together, these pins control various power-down modes.
CTRL3 37 Input Digital control input pins. Together, these pins control various power-down modes.
DA0 to DA13 40, 41, 42, 43, 44, 45, 46, 47, 50, 51, 52, 53, 54 ,55 Output Channel A ADC output data bits, CMOS levels
DB0 to DB13 60, 61, 62, 63, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 Output Channel B ADC output data bits, CMOS levels
DRGND 39, 49, 59, PAD Input Output buffer ground, should be shorted on-board to analog ground.
DRVDD 1, 38, 48, 58 Input Output buffer supply
INM_A 30 Input Differential analog negative input, channel A
INP_A 29 Input Differential analog positive input, channel A
INM_B 20 Input Differential analog negative input, channel B
INP_B 19 Input Differential analog positive input, channel B
RESET 12 Input Serial interface RESET input.
When using the serial interface mode, the internal registers must be initialized through a hardware RESET by applying a high pulse on this pin or by using the software reset option; refer to the Serial Interface Configuration section.
In parallel interface mode, the RESET pin must be permanently tied high. SDATA and SEN are used as parallel control pins in this mode.
This pin has an internal 150-kΩ pull-down resistor.
SCLK 13 Input This pin functions as a serial interface clock input when RESET is low. SCLK controls the low-speed mode when RESET is tied high; see Table 6 for detailed information. This pin has an internal 150-kΩ pull-down resistor.
SDATA 14 Input Serial interface data input; this pin has an internal 150-kΩ pull-down resistor.
SDOUT 64 Output This pin functions as a serial interface register readout when the READOUT bit is enabled. When READOUT = 0, this pin is in high-impedance state.
SEN 15 Input This pin functions as a serial interface enable input when RESET is low. SEN controls the output interface and data format selection when RESET is tied high; see Table 7 for detailed information. This pin has an internal 150-kΩ pull-up resistor to AVDD.
UNUSED 56 — This pin is not used in the CMOS interface
VCM 23 Output This pin outputs the common-mode voltage (1.9 V) that can be used externally to bias the analog input pins