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Overview
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Development Resources
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Application
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Ordering Detail
Overview
The TPA3531 and TPA3532 operational amplifiers feature very low input bias current. They operate from 4.5 V to 16 V (±2.25 V to ±8 V), and feature rail-to-rail output swing in addition to an input common-mode range that includes ground. The integrates guard buffer isolates the input pins from leakage in the printed circuit board. They minimize board component counts and enable easy system design.
The TPA3531 and TPA3532 are ideal for portable medical and industrial applications that require low-bias current analog front-end performance, such as photodiode transimpedance and chemical sensor interface circuits.
The TPA3531 and TPA3532 are available in the SOT23-5, MSOP8, and SOP8 packages, and are specified over the industrial temperature range from –40°C to +125°C.
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Status
Production
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Rating
Industrial
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Number of Channels
2
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Supply Voltage (Min) (V)
4.5
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Supply Voltage (Max) (V)
16
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Iq per channel (typ) (μA)
900
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GBW (Typ) (MHz)
2.1
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Slew Rate (Typ) (V/μs)
1.4
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Rail-Rail In
No, to V- only
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Rail-Rail Out
Yes
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Ishort (Typ) (mA)
31
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Vos (Max) (mV)
0.25
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Offset Drift (Typ) (μV/°C)
2
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Ib (typ) (pA)
0.2
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Vn at 1 kHz (Typ) (nV/rtHz)
18
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Peak Noise at 0.1 to 10Hz (μVpp)
/
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Shutdown/Disable
/
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Operating Temperature Range (℃)
-40 to 125
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Features
Low Ib
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Package
SOP8, MSOP8
Development Resources
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Documentation
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Show FilterHidden FilterDocumentation
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Data Sheet
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Selection Guide
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Newsletter
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Application Note
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Technical Note
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User Guide
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Test Report
- Document Name
- Type
- Language
- Date
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Selection GuideEnglish07/02/2025
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Data SheetEnglish10/10/2025
Ultra Low Input Bias Current Amplifier
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Technical NoteEnglish01/19/2024
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Technical NoteEnglish01/19/2024
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Technical NoteEnglish01/19/2024
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Technical NoteEnglish01/19/2024
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Application
• Photodiode Sensor Interface
• Industrial Sensors and Instrumentation
• A.T.E. Leakage Testing
Ordering Detail
| Order Part Number | Buy | Samples | Rating | Feature | Status | 1ku Price | Release Date | Package | Lead time (week) | MSL | Packing | MPQ | CPQ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| TPA3532-SO1R | Industrial Grade | / | Production | / | 2026-02-02 | SOP8 | 24 | MSL3 | T&R | 4000 | 20000 | ||
| TPA3532-VS1R | Industrial Grade | / | Production | / | 2026-02-02 | MSOP8 | 24 | MSL3 | T&R | 3000 | 15000 |
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