SBAS888A December   2020  – August 2021

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 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
    8. 6.8 Timing Requirements
    9. 6.9 Typical Characteristics
  7. 7 Parameter Measurement Information
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Analog Input
        1. 8.3.1.1 Analog Input Bandwidth
        2. 8.3.1.2 Analog Front End Design
          1. 8.3.1.2.1 Sampling Glitch Filter Design
          2. 8.3.1.2.2 Analog Input Termination and DC Bias
            1. 8.3.1.2.2.1 AC-Coupling
            2. 8.3.1.2.2.2 DC-Coupling
      2. 8.3.2 Clock Input
        1. 8.3.2.1 Single Ended vs Differential Clock Input
      3. 8.3.3 Voltage Reference
        1. 8.3.3.1 Internal voltage reference
        2. 8.3.3.2 External voltage reference (VREF)
        3. 8.3.3.3 External voltage reference with internal buffer (REFBUF)
      4. 8.3.4 Digital Down Converter
        1. 8.3.4.1 DDC MUX
        2. 8.3.4.2 Digital Filter Operation
        3. 8.3.4.3 FS/4 Mixing with Real Output
        4. 8.3.4.4 Numerically Controlled Oscillator (NCO) and Digital Mixer
        5. 8.3.4.5 Decimation Filter
        6. 8.3.4.6 SYNC
        7. 8.3.4.7 Output Formatting with Decimation
      5. 8.3.5 Digital Interface
        1. 8.3.5.1 Output Formatter
        2. 8.3.5.2 Output Interface/Mode Configuration
          1. 8.3.5.2.1 Configuration Example
        3. 8.3.5.3 Output Data Format
      6. 8.3.6 Test Pattern
    4. 8.4 Device Functional Modes
      1. 8.4.1 Normal operation
      2. 8.4.2 Power Down Options
    5. 8.5 Programming
      1. 8.5.1 Configuration using PINs only
      2. 8.5.2 Configuration using the SPI interface
        1. 8.5.2.1 Register Write
        2. 8.5.2.2 Register Read
    6. 8.6 Register Maps
      1. 8.6.1 Detailed Register Description
  9. 9 Application Information Disclaimer
    1. 9.1 Typical Application
      1. 9.1.1 Design Requirements
      2. 9.1.2 Detailed Design Procedure
        1. 9.1.2.1 Input Signal Path
        2. 9.1.2.2 Sampling Clock
        3. 9.1.2.3 Voltage Reference
      3. 9.1.3 Application Curves
    2. 9.2 Initialization Set Up
      1. 9.2.1 Register Initialization During Operation
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Receiving Notification of Documentation Updates
    2. 12.2 Support Resources
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

5 Pin Configuration and Functions

GUID-740BDBC5-96A5-47E7-B63E-CE58B8114D37-low.gif Figure 5-1 RSB Package, 40-Pin WQFN, Top View
Table 5-1 Pin Descriptions
PIN I/O DESCRIPTION
NAME NO.
INPUT/REFERENCE
AINM 13 I Negative analog input, channel A
AINP 12 I Positive analog input, channel A
BINP 39 I Positive analog input, channel B
BINM 38 I Negative analog input, channel B
REFBUF 4 I 1.2V external voltage reference input for use with internal reference buffer. Internal 100 kΩ pull-up resistor to AVDD. This pin is also used to configure default operating conditions.
REFGND 3 I Reference ground input
VCM 8 O Common-mode voltage output for the analog inputs, 0.95V
VREF 2 I External voltage reference input
CLOCK
CLKM 7 I Negative differential sampling clock input for the ADC
CLKP 6 I Positive differential sampling clock input for the ADC
CONFIGURATION
PDN/SYNC 1 I Power down/Synchronization input. This pin can be configured via the SPI interface. Active high. This pin has an internal 21 kΩ pull-down resistor.
RESET 9 I Hardware reset. Active high. This pin has an internal 21 kΩ pull-down resistor.
SCLK 35 I Serial interface clock input. This pin has an internal 21 kΩ pull-down resistor.
SDIO 10 I Serial interface data input and output. This pin has an internal 21 kΩ pull-down resistor.
SEN 16 I Serial interface enable. Active low. This pin has an internal 21 kΩ pull-up resistor to AVDD.
NC 27 - Do not connect
DIGITAL INTERFACE
DA0P 20 O Positive differential serial LVDS output for lane 0, channel A.
DA0M 19 O Negative differential serial LVDS output for lane 0, channel A.
DA1P 18 O Positive differential serial LVDS output for lane 1, channel A.
DA1M 17 O Negative differential serial LVDS output for lane 1, channel A.
DB0P 31 O Positive differential serial LVDS output for lane 0, channel B.
DB0M 32 O Negative differential serial LVDS output for lane 0, channel B.
DB1P 33 O Positive differential serial LVDS output for lane 1, channel B.
DB1M 34 O Negative differential serial LVDS output for lane 1, channel B.
DCLKP 23 O Positive differential serial LVDS bit clock output.
DCLKM 22 O Negative differential serial LVDS bit clock output.
FCLKP 28 O Positive differential serial LVDS frame clock output.
FCLKM 29 O Negative differential serial LVDS frame clock output.
DCLKINP 25 I Positive differential serial LVDS bit clock input. Internal 100 Ω differential termination.
DCLKINM 24 I Negative differential serial LVDS bit clock input. Internal 100 Ω differential termination.
POWER SUPPLY
AVDD 5,15,36 I Analog 1.8-V power supply
GND 11,14,37,40, PowerPAD I Ground, 0 V
IOGND 26 I Ground, 0 V for digital interface
IOVDD 21,30 I 1.8-V power supply for digital interface
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