SBOU315 March   2024 PGA849

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  7. 2Hardware
    1. 2.1 EVM Circuit Description
    2. 2.2 Jumper Settings
    3. 2.3 Power-Supply Connections
    4. 2.4 Analog Input and Output Connections
    5. 2.5 Reference Input
    6. 2.6 Digital Input Pins and Gain Control
    7. 2.7 Modifications
    8. 2.8 Best Practices
      1. 2.8.1 Electrostatic Discharge Caution
      2. 2.8.2 Hot Surface Warning
  8. 3Hardware Design Files
    1. 3.1 Schematic
    2. 3.2 PCB Layout
    3. 3.3 Bill of Materials
  9. 4Additional Information
    1. 4.1 Trademarks
  10. 5Related Documentation

2.4 Analog Input and Output Connections

The programmable amplifier input signal connections for the PGA849EVM are provided through the use of SMA connectors J4, J7, and test points TP4, TP8, located at the left of the EVM. The REF external input is provided through screw-terminal connector J2, located at the right of the board. The PGA849EVM also provides direct access to the REF pin through screw-terminal connector J5.1, and test point TP7 located at the right of the board.

The PGA849 output amplifier connection is provided through screw-terminal connector J5.4, SMA connector J3, and test point TP5, located at the right side of the EVM. Figure 3-5 displays a simplified diagram of the PGA849EVM input and output connections.

GUID-20240314-SS0I-KXK4-BHX7-TNCCBGPLTQVT-low.svgFigure 2-4 PGA849EVM Analog Input and Output Connections

Table 3-3 summarizes the input and output connectors and corresponding test points.

Table 2-3 PGA849EVM Analog Input and Output Connections
Connector Designator Signal Comment Test Point
J4 IN+ SMA TP4
J7 IN– SMA TP8
J3 OUT SMA TP3
J5.4 OUT Screw terminal TP3
J5.3 GND Screw terminal TP2
J5.2 GND Screw terminal TP9
J5.1

REF pin / REF_sense

 Screw terminal

TP7
J2.1 REF_Ext Screw terminal TP2
J2.2 GND Screw terminal N/A