SBASAL2 November   2025 ADC32RF72

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics - Power Consumption
    6. 5.6 Electrical Characteristics - DC Specifications
    7. 5.7 Electrical Characteristics - AC Specifications
    8. 5.8 Timing Requirements
    9. 5.9 Typical Characteristics
  7. 6 Parameter Measurement Information
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Analog Inputs
        1. 7.3.1.1 Input Bandwidth
        2. 7.3.1.2 Background Calibration
      2. 7.3.2 ADC Channel Selection and Power Down Modes
      3. 7.3.3 Sampling Clock Input
      4. 7.3.4 SYSREF
        1. 7.3.4.1 SYSREF Monitor
      5. 7.3.5 Digital Signal Processor (DSP) Features
        1. 7.3.5.1 DSP Input Mux
        2. 7.3.5.2 Fractional Delay
        3. 7.3.5.3 Programmable FIR Filter for Equalization
        4. 7.3.5.4 DSP Output Mux
        5. 7.3.5.5 Digital Down Converter (DDC)
          1. 7.3.5.5.1 Decimation Filter Input
          2. 7.3.5.5.2 Decimation Modes
          3. 7.3.5.5.3 Decimation Filter Response
          4. 7.3.5.5.4 Numerically Controlled Oscillator (NCO)
            1. 7.3.5.5.4.1 NCO Update
            2. 7.3.5.5.4.2 NCO RESET
      6. 7.3.6 Digital Output Interface
        1. 7.3.6.1 JESD204B/C Interface
          1. 7.3.6.1.1 JESD204B Initial Lane Alignment (ILA)
          2. 7.3.6.1.2 SYNC Signal
          3. 7.3.6.1.3 JESD204B/C Frame Assembly
          4. 7.3.6.1.4 JESD204B/C Frame Assembly in Bypass Mode
          5. 7.3.6.1.5 JESD204B/C Frame Assembly With Real Decimation
          6. 7.3.6.1.6 JESD204B,C Frame Assembly With Complex Decimation
        2. 7.3.6.2 JESD Output Reference Clock
    4. 7.4 Device Functional Modes
      1. 7.4.1 Device Operating Mode Comparison
    5. 7.5 Programming
      1. 7.5.1 GPIO Control
      2. 7.5.2 SPI Register Write
      3. 7.5.3 SPI Register Read
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application: Spectrum Analyzer
      1. 8.2.1 Design Requirements
        1. 8.2.1.1 Input Signal Path: Wideband Receiver
        2. 8.2.1.2 Clocking
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Sampling Clock Requirements
      3. 8.2.3 Application Performance Plots
    3. 8.3 Typical Application: Time Domain Digitizer
      1. 8.3.1 Design Requirements
        1. 8.3.1.1 Input Signal Path: Time Domain Digitizer
      2. 8.3.2 Application Performance Plots
    4. 8.4 Initialization Set Up
    5. 8.5 Power Supply Recommendations
    6. 8.6 Layout
      1. 8.6.1 Layout Guidelines
      2. 8.6.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Documentation Support
      1. 9.1.1 Related Documentation
      2. 9.1.2 Third-Party Products Disclaimer
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

7.1 Overview

The ADC32RF72 is a 16-bit, 1.5GSPS (non-interleaved), dual channel analog to digital converter (ADC). The design maximizes signal-to-noise ratio (SNR) and delivers a noise spectral density of -163.7dBFS/Hz. When providing the input signal to 2 ADC inputs, the NSD can be improved to as low as -166.2dBFS/Hz using internal digital averaging. The device lets the user select ADC0 and any of the 3 remaining ADC channels - two ADC channels (ADC0/1) on the same side of the package for 2x averaging or on the opposite side (ADC0/2) of the package for best isolation.

The analog signal input is buffered and supports a programmable internal termination impedance of 50Ω, 100Ω and 200Ω. The full power input bandwidth is 1.8GHz (-3dB) and the device supports direct RF sampling with input frequencies in from DC through L-band. The ADC32RF72 is designed for low residual phase noise to support high performance radar applications.

The device includes several digital processing features such as a 192-tap/ch programmable FIR filter for equalization, a 12-bit fractional delay filter as well as multiple digital down converters (DDCs). There are eight digital down converters supporting decimation factors of /2, /3 and /5. The 48-bit NCOs support phase coherent frequency hopping. Using the GPIO pins for NCO frequency control, frequency hopping can be achieved in less than 1µs. The digital down converters provide support for a wide range of instantaneous bandwidth (IBW) requirements, from wide band mode with /2 complex decimation to narrow bandwidth channels with complex decimation of /32768. The final /2 decimation stage features programmable filter coefficients.

The device supports the JESD204B/C serial data interface using 64b/66b and 8b/10b encoding with subclass 1 deterministic latency using data rates up to 24.75Gbps. Using both interface options, the ADC32RF7xcan output both full spectrum (DDC bypass) and decimated data. Furthermore, the SerDes PLL (lane rate /(8x k)) can be output to the FPGA to simplify system clocking.

The device requires 3 different power rails: 1.8V, 1.2V and 0.9V.