SNLU288 December   2020

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 Features
    2. 1.2 Applications
  3. 2Description
    1. 2.1  DS160PR412 and DS160PR421 4-Level I/O Control Inputs
    2. 2.2  DS160PR412 and DS160PR421 Modes of Operation
    3. 2.3  DS160PR412 and DS160PR421 SMBus or I2C Register Control Interface
    4. 2.4  DS160PR412 and DS160PR421 Equalization Control
    5. 2.5  DS160PR412 and DS160PR421 RX Detect State Machine
    6. 2.6  DS160PR412 and DS160PR421 DC Gain Control
    7. 2.7  DS160PR412-421EVM Global Controls
    8. 2.8  DS160PR412-421EVM Downstream Devices Control
    9. 2.9  DS160PR412-421EVM Upstream Devices Control
    10. 2.10 Quick-Start Guide (Pin Mode)
    11. 2.11 Quick-Start Guide (SMBus Slave Mode)
  4. 3Schematics
  5. 4PCB Layouts
  6. 5Bill of Materials

2.6 DS160PR412 and DS160PR421 DC Gain Control

When operating in Pin Mode, the GAIN/SDA pin can be used to set the overall datapath DC (low frequency) gain of the DS160PR412 and DS160PR421 as shown in Table 2-6.

Table 2-6 GAIN Control
GAIN/SDA PIN LEVELGAIN SETTING
L0–6 dB
L1–3 dB
L23 dB
L30 dB (Recommended for most use cases)

The DC gain of each channel of each device can also be set by writing to SMBus / I2C registers in Slave or Master Modes. See the DS160PR412, DS160PR421 Programming Guide for details.