Specifications
| Type | Description |
|---|---|
| Part Number | OPA2189 |
| Manufacturer | Texas Instruments |
| Product Type | Operational Amplifier |
| Category | Signal Chain |
| Package / Case | SOIC-8 4.90 mm x 3.90 mm; VSSOP-8 3.00 mm x 3.00 mm |
| Channels | 2 |
| Architecture | Zero-drift operational amplifier |
| Output Type | Rail-to-rail output |
| Input Common-Mode Range Feature | Input includes negative rail |
| Input Architecture | MUX-friendly inputs |
| Input Filtering | RFI/EMI filtered inputs |
| Input Offset Voltage | 3 uV max |
| Input Offset Voltage | 0.4 uV |
| Input Offset Drift | 0.005 uV/degC |
| Common-Mode Rejection Ratio | 168 dB |
| Open-Loop Gain | 170 dB |
| Voltage Noise Density | 5.2 nV/sqrtHz at 1 kHz |
| Low-Frequency Noise | 0.1 uVpp, 0.1 Hz to 10 Hz |
| Gain Bandwidth Product | 14 MHz |
| Slew Rate | 20 V/us |
| Settling Time | 1.1 us, 10-V step, 0.01% |
| Supply Voltage Range | 4.5 V to 36 V |
| Dual Supply Voltage Range | +/-2.25 V to +/-18 V |
| Quiescent Current | 1.7 mA max |
| Specified Temperature Range | -40 degC to +125 degC |
| Absolute Maximum Single-Supply Voltage | 40 V max |
| Absolute Maximum Dual-Supply Voltage | +/-20 V max |
| Absolute Maximum Common-Mode Voltage | (V-) - 0.5 V to (V+) + 0.5 V |
| Absolute Maximum Differential Input Voltage | (V+) - (V-) + 0.2 V |
| Absolute Maximum Input Current | +/-10 mA |
| Output Short Circuit | Continuous, short-circuit to ground, one amplifier per package |
| Absolute Maximum Operating Temperature | -55 degC to +150 degC |
| Absolute Maximum Junction Temperature | 150 degC |
| Storage Temperature Range | -65 degC to +150 degC |
| ESD Rating HBM | +/-4000 V |
| ESD Rating CDM | +/-1000 V |
| OPA2189 Pin 1 | OUT A |
| OPA2189 Pin 2 | -IN A |
| OPA2189 Pin 3 | +IN A |
| OPA2189 Pin 4 | V- |
| OPA2189 Pin 5 | +IN B |
| OPA2189 Pin 6 | -IN B |
| OPA2189 Pin 7 | OUT B |
| OPA2189 Pin 8 | V+ |
| Datasheet Status | request_only |
Product Overview
The OPA2189 is a Texas Instruments dual zero-drift operational amplifier for Signal_Chain circuits that require two precision amplifier channels in one package. The OPAx189 architecture provides rail-to-rail output operation, an input common-mode range that includes the negative rail, MUX-friendly inputs intended to prevent inrush current with large input differential voltages, and RFI/EMI filtered inputs.
Electrical parameters from the manufacturer datasheet include 168 dB common-mode rejection ratio, 170 dB open-loop gain, 5.2 nV/sqrtHz 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 product, 20 V/us slew rate, and 1.1 us settling time for a 10-V step to 0.01%.
OPA2189 is available in 8-pin SOIC and 8-pin VSSOP package options. Pin functions include OUT A, -IN A, +IN A, V-, +IN B, -IN B, OUT B, and V+. The recommended operating range is 4.5 V to 36 V single supply or +/-2.25 V to +/-18 V dual supply, with all versions specified from -40 degC to +125 degC.
Key Features
- Dual-channel zero-drift operational amplifier architecture
- Rail-to-rail output for OPAx189 family circuits
- Input common-mode range includes the negative rail
- MUX-friendly inputs limit inrush with differential input voltages
- RFI/EMI filtered inputs for signal-chain robustness
- 168 dB common-mode rejection ratio
- 170 dB open-loop gain performance
- 14 MHz gain bandwidth product
- 20 V/us slew rate
- 1.7 mA maximum quiescent current
Typical Applications
- Precision dual-channel signal conditioning
- Muxed analog input stages
- Low-frequency noise measurement circuits
- Rail-to-rail output amplifier stages
- Single-supply signal-chain designs
- Dual-supply analog front ends
- RFI/EMI exposed input circuits
Procurement Notes
When requesting a quote for OPA2189, 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
How many amplifier channels does OPA2189 include?
OPA2189 is the dual-channel device in the OPAx189 family, so it includes two operational amplifier channels. The 8-pin pinout provides OUT A, -IN A, +IN A, OUT B, -IN B, and +IN B connections.
What supply ranges are specified for OPA2189 operation?
The recommended single-supply operating range is 4.5 V to 36 V. For dual-supply operation, the recommended range is +/-2.25 V to +/-18 V. Absolute maximum ratings are 40 V single supply or +/-20 V dual supply.
What package options are listed for OPA2189?
The listed package options are SOIC-8 measuring 4.90 mm x 3.90 mm and VSSOP-8 measuring 3.00 mm x 3.00 mm. Both are 8-pin packages using the OPA2189 pin functions shown in the datasheet.
What precision and dynamic parameters define this amplifier?
Key listed parameters include 168 dB CMRR, 170 dB open-loop gain, 5.2 nV/sqrtHz noise density at 1 kHz, 0.1 uVpp noise from 0.1 Hz to 10 Hz, 14 MHz gain bandwidth, and 20 V/us slew rate.
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.