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Inverting Programmable Gain Amplifier (PGA_Inv) | Cypress Semiconductor

Inverting Programmable Gain Amplifier (PGA_Inv)

Last Updated: 
Aug 01, 2016
  • Gain steps from -1 to -49
  • High input impedance
  • Adjustable power settings
Symbol Diagram

General Description

The Inverting Programmable Gain Amplifier (PGA_Inv) component implements an opamp-based inverting amplifier with user-programmable gain. It is derived from the switched capacitor/continuous time (SC/CT) block.

The inverting gain can be between -1.0 (0 dB) and -49.0 (+33.8 dB). The gain can be selected using the configuration window or changed at run time using the provided API. The maximum bandwidth is limited by the gain-bandwidth of the opamp and is reduced as the gain is increased. The input of the PGA_Inv operates from rail to rail, but the maximum input swing (difference between Vin and Vref) is limited to VDDA/Gain. The output of the PGA_Inv is class A, and is rail to rail for sufficiently high load resistance.

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