Description:

The TPA3530 operational amplifier features afemtoampere-level input bias current. It operates from 4.5V to 16 V (±2.25 V to ±8 V), and features rail-to-railoutput swing in addition to an input common-mode rangethat includes ground. The integrated guard buffer isolatesthe input pins from leakage in the printed circuit board.It minimizes board component counts and enables easysystem design.The TPA3530 is ideal for portable medical and industrialapplications that require low-bias current analog front-endperformance, such as photodiode trans-impedance andchemical sensor interface circuits.The TPA3530 is available in the SOP8 package, andis specified over the industrial temperature range from–40°C to +125°C. The unique pinout is optimized toprevent signals from coupling among the sensitive inputpins, power supplies, and output pins while enabling easyrouting of the guard ring traces.

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 TestLimit)

• 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