SLVUDF7 October   2025

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   Applications
  6.   6
  7. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Electrostatic Discharge Caution
    3. 1.3 Kit Contents
    4. 1.4 Specification
    5. 1.5 Device Information
    6. 1.6 Hot Surface Warning
  8. 2Hardware
    1. 2.1 Setup and Connections
    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
  9. 3Hardware Design Files
    1. 3.1 PCB Layout
    2. 3.2 Schematic
    3. 3.3 Bill of Materials
  10. 4Additional Information
    1. 4.1 Trademarks
  11. 5Related Documentation

1.5 Device Information

The PGA848 is a wide-bandwidth, high-voltage, low-noise programmable gain instrumentation amplifier with single-ended output. The super-beta input transistors offer low input bias current, which in turn provides a low input current noise density of 0.3pA/√Hz, making the PGA848a versatile choice for virtually any sensor type. The inputs include a built-in over-voltage protection of ±40V beyond the power supplies. The low-noise current-feedback front-end architecture offers gain flatness at high frequencies, making the PGA848 an excellent high-impedance sensor readout device.

The PGA849 is similar to the PGA848 but offers different gain options. The PGA848 and PGA849 are pin-to-pin compatible and this EVM can be used for both. The table below outlines jumper and gain configurations.

Table 1-2 Gain options for the PGA848 and PGA849 in V/V

A2 (J10)

A1 (J11)

A0 (J12)

PGA848

PGA849

0

0

0

0.5

0.125

0

0

1

1

0.25

0

1

0

2

0.5

0

1

1

5

1

1

0

0

10

2

1

0

1

20

4

1

1

0

50

8

1

1

1

100

16