SBASAU8 December   2024 ADC3649

PRODMIX  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison
  6. 5 Pin Configuration and Functions
  7. 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 - Power Consumption
    6. 6.6  Electrical Characteristics - DC Specifications
    7. 6.7  Electrical Characteristics - AC Specifications (ADC3648 - 250 MSPS)
    8. 6.8  Electrical Characteristics - AC Specifications (ADC3649 - 500 MSPS)
    9. 6.9  Timing Requirements
    10. 6.10 Typical Characteristics, ADC3648
    11. 6.11 Typical Characteristics, ADC3649
  8. 7 Parameter Measurement Information
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Analog Inputs
        1. 8.3.1.1 Nyquist Zone Selection
        2. 8.3.1.2 Analog Front End Design
      2. 8.3.2 Sampling Clock
      3. 8.3.3 Multi-Chip Synchronization
        1. 8.3.3.1 SYSREF Monitor
      4. 8.3.4 Time-Stamp
      5. 8.3.5 Overrange
      6. 8.3.6 External Voltage Reference
      7. 8.3.7 Digital Gain
      8. 8.3.8 Decimation Filter
        1. 8.3.8.1 Uncommon Decimation Ratios
        2. 8.3.8.2 Decimation Filter Response
        3. 8.3.8.3 Decimation Filter Configuration
        4. 8.3.8.4 Numerically Controlled Oscillator (NCO)
      9. 8.3.9 Digital Interface
        1. 8.3.9.1 Parallel LVDS
        2. 8.3.9.2 Serial LVDS (SLVDS) with Decimation
          1. 8.3.9.2.1 SLVDS - Status Bit Insertion
        3. 8.3.9.3 Output Data Format
        4. 8.3.9.4 32-bit Output Resolution
        5. 8.3.9.5 Output Scrambler
        6. 8.3.9.6 Output MUX
        7. 8.3.9.7 Test Pattern
    4. 8.4 Device Functional Modes
      1. 8.4.1 Low Latency Mode
      2. 8.4.2 Digital Channel Averaging
      3. 8.4.3 Power Down Mode
    5. 8.5 Programming
      1. 8.5.1 GPIO Programming
      2. 8.5.2 Register Write
      3. 8.5.3 Register Read
      4. 8.5.4 Device Programming
      5. 8.5.5 Register Map
      6. 8.5.6 Detailed Register Description
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Wideband Spectrum Analyzer
      2. 9.2.2 Design Requirements
        1. 9.2.2.1 Input Signal Path
        2. 9.2.2.2 Clocking
      3. 9.2.3 Detailed Design Procedure
        1. 9.2.3.1 Sampling Clock
      4. 9.2.4 Application Performance Plots
    3. 9.3 Initialization Set Up
    4. 9.4 Power Supply Recommendations
    5. 9.5 Layout
      1. 9.5.1 Layout Guidelines
      2. 9.5.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Documentation Support
      1. 10.1.1 Third-Party Products Disclaimer
    2. 10.2 Receiving Notification of Documentation Updates
    3. 10.3 Support Resources
    4. 10.4 Trademarks
    5. 10.5 Electrostatic Discharge Caution
    6. 10.6 Glossary
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information

Package Options

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

6.9 Timing Requirements

Maximum and minimum values are specified over the operating free-air temperature range and nominal supply voltages. Typical values are specified at TA = 25°C, ADC sampling rate = 500 MSPS, DDC Bypass mode, 50% clock duty cycle, nominal supply voltages and –1-dBFS differential input, unless otherwise noted
PARAMETER TEST CONDITIONS MIN NOM MAX UNIT
ADC TIMING SPECIFICATIONS
TAD Aperture Delay 200 ps
TA Aperture Jitter 75 fs
CER Code error rate FS = 500 MSPS, Error > 256 codes 1E-10 errors/sample
FS = 500 MSPS, Error > 512 codes 3E-13
FS = 250 MSPS, Error > 256 codes 1E-11
Wake up time time to valid data after coming out of global power down mode (internal voltage reference OFF) 3 ms
LATENCY: tPD + tADC + tDIG
tPD Propagation delay: sampling clock falling edge to DCLK rising edge Propagation delay: sampling clock falling edge to DCLK rising edge 1.4 + TS/4 1.7 + TS/4 2 + TS/4 ns
tADC ADC latency DDR LVDS, normal mode 38 ADC clock cycles
DDR LVDS, low latency mode 4
Time stamp: input to LVDS output DDR LVDS 8
tDIG Digital latency: interface and decimation DDC bypass 5 Output clock cycles
Decimation by 2 (real or complex) 24
Decimation by 4,8 (real or complex) 49
Decimation by 16...32768 (real or complex) 50
SERIAL PROGRAMMING INTERFACE (SCLK, SEN, SDIO) - Input
fCLK(SCLK) Serial clock frequency 1 20 MHz
tSLOADS Setup time from SEN falling edge to SCLK rising edge 10 ns
tSLOADH Hold time from SCLK rising edge to SEN rising edge 10 ns
tDSU Setup time from SDIO to rising edge of SCLK 10 ns
tDH Hold time from rising edge of SCLK to SDIO 10 ns
SERIAL PROGRAMMING INTERFACE (SDIO) - Output
t(OZD) SDIO tri-state to driven 10 ns
t(ODZ) SDIO data to tri-state 14 ns
t(OD) SDIO valid from falling edge of SCLK 10 ns
TIMING: SYSREF
ts(SYSREF) Setup time: SYSREF valid to rising edge of CLKP/M 100 ps
th(SYSREF) Hold time: Rising edge of CLKP/M to SYSREF invalid 100 ps
INTERFACE TIMING: DDR AND SLVDS
tDV Time Data Valid: data transition to DCLK transition FS = 500 MSPS 0.465 0.68 0.905 ns
FS = 250 MSPS 0.905 1.16 1.415 ns
tDI Time Data Invalid : DCLK transition to data transition FS = 500 MSPS 0.095 0.32 0.535 ns
FS = 250 MSPS 0.615 0.84 1.065 ns