SBASAU8B December   2024  – June 2025 ADC3648 , ADC3649

PRODUCTION DATA  

  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

6.10 Typical Characteristics, ADC3648

Typical values are specified at TA = 25°C, ADC sampling rate = 250MSPS, DDC bypass mode, 50% clock duty cycle, nominal supply voltages and –1dBFS differential input, unless otherwise noted

ADC3648 ADC3649 Idle Channel Noise
SNR = 74.5dBFS, NSD = -155.5dBFS/Hz
Figure 6-1 Idle Channel Noise
ADC3648 ADC3649 Single Tone FFT at FIN = 101MHz, AIN = -20dBFS
SNR = 74.2dBFS, HD23 = 89dBc, Non HD23 = 105dBFS
Figure 6-3 Single Tone FFT at FIN = 101MHz, AIN = -20dBFS
ADC3648 ADC3649 Single Tone FFT at FIN = 240MHz
SNR = 72.3dBFS, HD23 = 82dBc, Non HD23 = 98dBFS
Figure 6-5 Single Tone FFT at FIN = 240MHz
ADC3648 ADC3649 Single Tone FFT at FIN = 300MHz
SNR = 71.4dBFS, HD23 = 80dBc, Non HD23 = 85dBFS
Figure 6-7 Single Tone FFT at FIN = 300MHz
ADC3648 ADC3649 Two Tone FFT at FIN = 90/110MHz
AIN = -7dBFS/tone, IMD3 =  91dBc
Figure 6-9 Two Tone FFT at FIN = 90/110MHz
ADC3648 ADC3649 Two Tone FFT at FIN = 220/240MHz
AIN = -7dBFS/tone, IMD3 =  83dBc
Figure 6-11 Two Tone FFT at FIN = 220/240MHz
ADC3648 ADC3649 AC Performance vs FIN
 
Figure 6-13 AC Performance vs FIN
ADC3648 ADC3649 AC Performance vs AIN
FIN = 100MHz 
Figure 6-15 AC Performance vs AIN
ADC3648 ADC3649 IMD3 vs AIN
FIN = 70/100MHz 
Figure 6-17 IMD3 vs AIN
ADC3648 ADC3649 AC Performance vs AVDD18
FIN = 100MHz, AIN = -1dBFS   
Figure 6-19 AC Performance vs AVDD18
ADC3648 ADC3649 AC Performance vs VCM
FIN = 100MHz, AIN = -1dBFS  
Figure 6-21 AC Performance vs VCM
ADC3648 ADC3649 DNL
 
Figure 6-23 DNL
ADC3648 ADC3649 DC Offset Histogram
 
Figure 6-25 DC Offset Histogram
ADC3648 ADC3649 Single Tone FFT at FIN = 101MHz
SNR = 74.1dBFS, HD23 = 80dBc, Non HD23 = 96dBFS
Figure 6-2 Single Tone FFT at FIN = 101MHz
ADC3648 ADC3649 Single Tone FFT at FIN = 170MHz
SNR = 72.8dBFS, HD23 = 79dBc, Non HD23 = 88dBFS
Figure 6-4 Single Tone FFT at FIN = 170MHz
ADC3648 ADC3649 Single Tone FFT at FIN = 240MHz, AIN = -20dBFS
SNR = 74.1dBFS, HD23 = 86dBc, Non HD23 = 105dBFS
Figure 6-6 Single Tone FFT at FIN = 240MHz, AIN = -20dBFS
ADC3648 ADC3649 Single Tone FFT at FIN = 450MHz
SNR = 70.1dBFS, HD23 = 76dBc, Non HD23 = 80dBFS
Figure 6-8 Single Tone FFT at FIN = 450MHz
ADC3648 ADC3649 Two Tone FFT at FIN = 70/100MHz
AIN = -20dBFS/tone, IMD3 = 99dBc
Figure 6-10 Two Tone FFT at FIN = 70/100MHz
ADC3648 ADC3649 Two Tone FFT at FIN = 220/240MHz
AIN = -20dBFS/tone, IMD3 = 87dBc
Figure 6-12 Two Tone FFT at FIN = 220/240MHz
ADC3648 ADC3649 AC Performance vs AIN
FIN = 10MHz 
Figure 6-14 AC Performance vs AIN
ADC3648 ADC3649 AC Performance vs FS
FIN = 100MHz, AIN = -1dBFS
Figure 6-16 AC Performance vs FS
ADC3648 ADC3649 AC Performance vs Clock Duty Cycle
FIN = 100MHz, AIN = -1dBFS   
Figure 6-18 AC Performance vs Clock Duty Cycle
ADC3648 ADC3649 AC Performance vs AVDD12
FIN = 100MHz, AIN = -1dBFS   
Figure 6-20 AC Performance vs AVDD12
ADC3648 ADC3649 AC Performance vs Temperature
 FIN = 100MHz, AIN = -1dBFS 
Figure 6-22 AC Performance vs Temperature
ADC3648 ADC3649 INL
 
Figure 6-24 INL
ADC3648 ADC3649 Pulse Response
 
Figure 6-26 Pulse Response