SLWS214C October   2008  – May 2026 ADS61B29 , ADS61B49

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
    1. 4.1 Pin Configuration and Functions (LVDS Mode) — ADS61B49 and ADS61B29
    2. 4.2 Pin Configuration and Functions (CMOS Mode) – ADS61B49 and ADS61B29
  6. 5 Specifications
    1. 5.1  Absolute Maximum Ratings
    2. 5.2  Recommended Operating Conditions
    3. 5.3  Electrical Characteristics – ADS61B49 and ADS61B29
    4. 5.4  Electrical Characteristics – ADS61B49 and ADS61B29
    5. 5.5  Electrical Characteristics – ADS61B49 and ADS61B29
    6. 5.6  Digital Characteristics – ADS61B49 and ADS61B29
    7. 5.7  Timing Requirements – LVDS and CMOS Modes
    8. 5.8  Typical Characteristics - ADS61B49
    9. 5.9  Typical Characteristics - ADS61B29
    10. 5.10 Typical Characteristics - Common Plots (both ADS61B49/61B29)
    11. 5.11 Contour Plots - ADS61B49/ADS61B29
    12. 5.12 Contour Plots - ADS61B49
    13. 5.13 Contour Plots - ADS61B29
  7. 6 Detailed Description
    1. 6.1 Functional Block Diagrams
      1. 6.1.1 ADS61B29 Block Diagram
      2. 6.1.2 ADS61B49 Block Diagram
    2. 6.2 Feature Description
      1. 6.2.1 Device Configuration
      2. 6.2.2 Parallel Configuration Only
      3. 6.2.3 Serial Interface Configuration Only
      4. 6.2.4 Configuration Using Both The Serial Interface and Parallel Controls
      5. 6.2.5 Description of Parallel Pins
      6. 6.2.6 Serial Interface
        1. 6.2.6.1 Register Initialization
      7. 6.2.7 Serial Interface Timing Characteristics
      8. 6.2.8 Serial Register Readout
      9. 6.2.9 Reset Timing
    3. 6.3 Serial Register Map
      1. 6.3.1 Description of Serial Registers
  8. 7 Application and Implementation
    1. 7.1 Application Information
      1. 7.1.1  Theory of Operation
      2. 7.1.2  Analog Input
        1. 7.1.2.1 Drive Circuit Requirements
        2. 7.1.2.2 Driving Circuit
        3. 7.1.2.3 Input Common-Mode
      3. 7.1.3  Reference
      4. 7.1.4  Clock Input
      5. 7.1.5  Fine Gain Control
      6. 7.1.6  Offset Correction
      7. 7.1.7  Power Down
        1. 7.1.7.1 Power-Down Global
        2. 7.1.7.2 Standby
        3. 7.1.7.3 Output Buffer Disable
        4. 7.1.7.4 Input Clock Stop
      8. 7.1.8  Power Supply Sequence
      9. 7.1.9  Digital Output Information
        1. 7.1.9.1 Output Interface
        2. 7.1.9.2 DDR LVDS Outputs
        3. 7.1.9.3 LVDS Buffer
        4. 7.1.9.4 Parallel CMOS Interface
        5. 7.1.9.5 Output Buffer Strength Programmability
        6. 7.1.9.6 CMOS Interface Power Dissipation
        7. 7.1.9.7 Output Data Format
      10. 7.1.10 Board Design Considerations
        1. 7.1.10.1 Grounding
        2. 7.1.10.2 Supply Decoupling
        3. 7.1.10.3 Exposed Pad
      11. 7.1.11 Definition of Specifications
  9. 8 Device and Documentation Support
    1. 8.1 Third-Party Products Disclaimer
    2. 8.2 Receiving Notification of Documentation Updates
    3. 8.3 Support Resources
    4. 8.4 Trademarks
    5. 8.5 Electrostatic Discharge Caution
    6. 8.6 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

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5.5 Electrical Characteristics – ADS61B49 and ADS61B29

Typical values are at 25°C, AVDD = 3.3 V, DRVDD = 1.8 V, 50% clock duty cycle, –1 dBFS differential analog input, internal reference mode unless otherwise noted.
Min and max values are across the full temperature range TMIN = –40°C to TMAX = 85°C, AVDD = 3.3 V, DRVDD = 1.8 V
PARAMETERADS61B49/ADS61B29
250 MSPS		UNIT
MINTYPMAX
SFDR
Spurious free dynamic range		Fin = 20MHz92dBc
Fin = 80MHz86
Fin = 100MHz86
Fin = 170MHz (all spurs/harmonics)7484
Fin = 170MHz (excluding 2nd harmonic)7787
Fin = 300MHz76
THD
Total harmonic distortion		Fin = 20MHz89dBc
Fin = 80MHz83
Fin = 100MHz82
Fin = 170MHz7279
Fin = 300MHz73
HD2,
Second harmonic distortion		Fin = 20MHz94dBc
Fin = 80MHz90
Fin = 100MHz88
Fin = 170MHz7484
Fin = 300MHz76
HD3
Third harmonic distortion		Fin = 20MHz93dBc
Fin = 80MHz86
Fin = 100MHz85
Fin = 170MHz7787
Fin = 300MHz76
Worst Spur
Other than second, third harmonics		Fin = 20MHz96dBc
Fin = 80MHz94
Fin = 100MHz94
Fin = 170MHz8092
Fin = 300MHz90
IMD
2-tone inter-modulation distortion		F1 = 46MHz, F2 = 50MHz,
Each tone at –7dBFS		94dBFS
F1 = 185MHz, F2 = 190MHz,
Each tone at –7dBFS		90
Input overload recoveryRecovery to within 1% (of final value) for 6dB overload with sine wave input1Clock Cycles
PSRR
AC power supply rejection ratio		For 100mVpp signal on AVDD supply25dB