TIPGA204AU
Overview
The PGA204AU is a precision digitally programmable gain instrumentation amplifier (PGIA) that allows gain selection of 1, 10, 100, or 1000 V/V using two TTL-compatible CMOS inputs. It features a low input offset voltage of 25 uV and a very low input bias current of 500 pA, making it ideal for high-impedance sensor interfaces. The device integrates laser-trimmed resistors on a single monolithic chip, eliminating the need for external gain-setting components and ensuring excellent gain accuracy and common-mode rejection.
Why Choose This Part
The PGA204AU eliminates the need for external precision resistors, reducing board space and improving reliability by providing integrated gain switching. It operates over a wide supply range up to +/-40V and requires no separate logic supply, simplifying the power architecture in industrial environments. With a 1 MHz bandwidth and a 0.7V/us slew rate, it maintains signal integrity across its programmable gain settings.
Applications
Key Specifications
Getting Started
When designing with the PGA204AU, ensure that the digital logic pins (A0, A1) are tied to a stable ground or logic high level as they determine the gain setting; these pins are TTL/CMOS compatible and do not require a separate VCC pin. Proper decoupling of the dual power supplies with 0.1uF ceramic capacitors close to the device pins is essential for maintaining the 25 uV offset performance. For evaluation, this SOIC-16 component can be mounted on a standard 1.27mm pitch breakout board for breadboard prototyping.
