Description：

The TPA3531/TPA3532 operational amplifier features verylow input bias current. It operates from 4.5 V to 16 V(±2.25 V to ±8 V), and features rail-to-rail output swingin addition to an input common-mode range that includesground. The integrated guard buffer isolates the input pinsfrom leakage in the printed circuit board. It minimizesboard component counts and enables easy system design.The TPA3531/TPA3532 is ideal for portable medicaland industrial applications that require low-bias currentanalog front-end performance, such as photodiode transimpedance and chemical sensor interface circuits.The TPA3531/TPA3532 is available in the SOT23-5/MSOP8/SOP8 package, and is specified over the industrialtemperature range from –40°C to +125°C.

Features：

• Ultra-Low Input Bias Current:– ±1 pA (Max) at TA = 25°C (Lab Test Limit)– ±30 pA (Max) at −40°C < TA < +125°C (Lab TestLimit)

• Low Input Offset Voltage: ±250 µV (Max)

• Integrated Guard Buffer with 200-µV Maximum Offset

• Low Voltage Noise Density: 18 nV/√Hz at 1 kHz

• Wide Bandwidth: 2.1 MHz

• Supply Voltage: 4.5 V to 16 V (±2.25 V to ±8 V)

• Rail-to-Rail Output Swing

• ESD Rating: Robust 3-kV HBM, 1.5-kV CDM

Applications：

• Photodiode Sensor Interface

• Industrial Sensors and Instrumentation

• A.T.E. Leakage Testing