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Features

? Ultra-Low Input Bias Current:

– ±100 fA (Max) at TA = 25°C (Lab Test Limit)

– ±800 fA (Max) at ?40°C < TA < +125°C (Lab Test

Limit)

? Low Input Offset Voltage: ±150 μV (Max)

? Integrated Guard Buffer with 120-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

Description

The TPA3530 operational amplifier features a

femtoampere-level input bias current. It operates from 4.5

V to 16 V (±2.25 V to ±8 V), and features rail-to-rail

output swing in addition to an input common-mode range

that includes ground. The integrated guard buffer isolates

the input pins from leakage in the printed circuit board.

It minimizes board component counts and enables easy

system design.

The TPA3530 is ideal for portable medical and industrial

applications that require low-bias current analog front-end

performance, such as photodiode trans-impedance and

chemical sensor interface circuits.

The TPA3530 is available in the SOP8 package, and

is specified over the industrial temperature range from

–40°C to +125°C. The unique pinout is optimized to

prevent signals from coupling among the sensitive input

pins, power supplies, and output pins while enabling easy

routing of the guard ring traces.