Specifications
| Type | Description |
|---|---|
| Part Number | OPA189 |
| Manufacturer | Texas Instruments |
| Product Type | Operational Amplifier |
| Category | Signal Chain |
| Inferred Category | Signal_Chain |
| Component Type | Other |
| Package Case | OPA189: SOIC-8 4.90 mm x 3.90 mm, SOT-23-5 2.90 mm x 1.60 mm, VSSOP-8 3.00 mm x 3.00 mm; OPA2189: SOIC-8 4.90 mm x 3.90 mm, VSSOP-8 3.00 mm x 3.00 mm; OPA4189: TSSOP-14 5.00 mm x 4.40 mm, SOIC-14 8.65 mm x 3.91 mm |
| Amplifier Family | OPA189, OPA2189, OPA4189 |
| Channels | 1 channel |
| Input Offset Voltage | 3 uV max |
| Typical Offset Voltage | 0.4 uV |
| Input Offset Drift | 0.005 uV/degC |
| CMRR | 168 dB |
| Open-Loop Gain | 170 dB |
| Input Voltage Noise Density | 5.2 nV/sqrt(Hz) at 1 kHz |
| Low-Frequency Noise | 0.1 uVPP from 0.1 Hz to 10 Hz |
| Gain Bandwidth | 14 MHz |
| Slew Rate | 20 V/us |
| Settling Time | 1.1 us for 10-V step, 0.01% settling |
| Recommended Supply Voltage | 4.5 V to 36 V single-supply; +/-2.25 V to +/-18 V dual-supply |
| Absolute Maximum Supply Voltage | 40 V single-supply; +/-20 V dual-supply |
| Quiescent Current | 1.7 mA max |
| Output Type | Rail-to-rail output |
| Input Common-Mode Capability | Input includes negative rail |
| Input Architecture | MUX-friendly inputs, RFI/EMI filtered inputs |
| Absolute Maximum Common-Mode Input Voltage | (V-) - 0.5 V to (V+) + 0.5 V |
| Absolute Maximum Differential Input Voltage | (V+) - (V-) + 0.2 V |
| Absolute Maximum Signal Input Current | +/-10 mA |
| Output Short Circuit | Continuous short-circuit to ground, one amplifier per package |
| Operating Temperature Range | -55 degC to 150 degC absolute maximum; -40 degC to 125 degC specified operating range |
| Junction Temperature | 150 degC max |
| Storage Temperature | -65 degC to 150 degC |
| ESD Rating HBM | +/-4000 V, Human-body model, ANSI/ESDA/JEDEC JS-001 |
| ESD Rating CDM | +/-1000 V, Charged-device model, JEDEC JESD22-C101 |
| OPA189 SOIC/VSSOP Pinout | -IN pin 2, +IN pin 3, OUT pin 6, V- pin 4, V+ pin 7, NC pins 1/5/8 |
| OPA189 SOT-23 Pinout | OUT pin 1, V- pin 2, +IN pin 3, -IN pin 4, V+ pin 5 |
| OPA2189 Pinout | OUT A pin 1, -IN A pin 2, +IN A pin 3, V- pin 4, +IN B pin 5, -IN B pin 6, OUT B pin 7, V+ pin 8 |
| OPA4189 Pinout | OUT A pin 1, -IN A pin 2, +IN A pin 3, V+ pin 4, +IN B pin 5, -IN B pin 6, OUT B pin 7, OUT C pin 8, -IN C pin 9, +IN C pin 10, V- pin 11, +IN D pin 12, -IN D pin 13, OUT D pin 14 |
| Datasheet Status | request_only |
Product Overview
The Texas Instruments OPA189 is a single-channel member of the OPAx189 zero-drift operational amplifier family, which also includes the OPA2189 and OPA4189. It is specified for precision Signal_Chain designs with 3 uV maximum input offset voltage, 0.4 uV typical offset voltage, and 0.005 uV/degC input offset drift over temperature.
DC and noise performance parameters include 168 dB CMRR, 170 dB open-loop gain, 5.2 nV/sqrt(Hz) input voltage noise density at 1 kHz, and 0.1 uVPP low-frequency noise from 0.1 Hz to 10 Hz. Dynamic specifications include 14 MHz gain bandwidth, 20 V/us slew rate, and 1.1 us settling time for a 10-V step to 0.01%.
OPA189 package options include SOIC-8, SOT-23-5, and VSSOP-8. The device supports 4.5 V to 36 V single-supply operation or +/-2.25 V to +/-18 V dual-supply operation, with rail-to-rail output and input common-mode capability that includes the negative rail. MUX-friendly inputs and RFI/EMI filtered inputs support precision front-end and multiplexed signal-chain applications.
Key Features
- Zero-drift operational amplifier in OPAx189 family
- Single-channel OPA189 version
- 3 uV maximum input offset voltage
- 0.005 uV/degC input offset drift
- 168 dB CMRR and 170 dB open-loop gain
- 5.2 nV/sqrt(Hz) input noise at 1 kHz
- 14 MHz gain bandwidth and 20 V/us slew rate
- 1.1 us settling for 10-V step to 0.01%
- Rail-to-rail output with negative-rail input capability
- MUX-friendly and RFI/EMI filtered inputs
- 4.5 V to 36 V single-supply operation
- 1.7 mA maximum quiescent current
Typical Applications
- Precision signal-chain amplification
- Sensor front-end conditioning
- Multiplexed input measurement circuits
- Low-offset DC measurement paths
- Rail-to-rail output signal stages
- Wide-supply analog front ends
- Low-frequency noise-sensitive circuits
Procurement Notes
When requesting a quote for OPA189, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For analog and signal-chain sourcing, supply voltage, bandwidth, accuracy, noise level, package, temperature grade, input/output configuration and qualification requirements should be verified before approval.
FAQ
What type of amplifier is the OPA189?
The OPA189 is a Texas Instruments zero-drift operational amplifier in the Signal_Chain category. It is the single-channel version of the OPAx189 family, alongside the OPA2189 dual and OPA4189 quad versions.
What offset and drift specifications does OPA189 provide?
For the OPA189 single-channel version, the extracted datasheet facts list 3 uV maximum input offset voltage, 0.4 uV typical offset voltage, and 0.005 uV/degC input offset drift over temperature.
What supply range is recommended for OPA189 operation?
The recommended operating supply range is 4.5 V to 36 V for single-supply use, or +/-2.25 V to +/-18 V for dual-supply use. Absolute maximum supply ratings are 40 V single-supply or +/-20 V dual-supply.
Which packages and pinouts are listed for OPA189?
OPA189 package options include SOIC-8, SOT-23-5, and VSSOP-8. SOIC/VSSOP use -IN pin 2, +IN pin 3, OUT pin 6, V- pin 4, V+ pin 7, and NC pins 1, 5, and 8. SOT-23-5 uses OUT pin 1, V- pin 2, +IN pin 3, -IN pin 4, and V+ pin 5.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: June 30, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.