Overview
The OPA189IDR is a precision operational amplifier manufactured by Texas Instruments. It is part of the OPAx189 family, which includes ultra-low noise, fast-settling, and zero-drift devices. This amplifier is designed for high-precision applications, offering rail-to-rail output operation and a unique MUX-friendly architecture. The OPA189IDR is particularly suited for precision instrumentation, signal measurement, and active filtering due to its excellent DC and AC performance characteristics.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Range | 4.5 to 36 | V |
| Input Offset Voltage | 3 | μV (max) |
| Input Offset Voltage Drift | 0.005 | μV/°C |
| Common-Mode Rejection Ratio (CMRR) | 168 | dB |
| Open-Loop Gain | 170 | dB |
| Gain Bandwidth | 14 | MHz |
| Slew Rate | 20 | V/μs |
| Input Voltage Noise Density at 1 kHz | 5.2 | nV/√Hz |
| Input Current Noise Density at 1 kHz | 165 | fA/√Hz |
| Quiescent Current | 1.7 | mA (max) |
| Operating Temperature Range | -40 to 125 | °C |
| Package Type | SOIC (D) |
Key Features
- Ultra-high precision: Zero-drift of 0.005 μV/°C and ultra-low offset voltage of 3 μV maximum.
- Excellent DC precision: CMRR of 168 dB and open-loop gain of 170 dB.
- Low noise: Input voltage noise density of 5.2 nV/√Hz at 1 kHz and 0.1-μVPP noise from 0.1 Hz to 10 Hz.
- Excellent dynamic performance: Gain bandwidth of 14 MHz, slew rate of 20 V/μs, and fast settling time of 0.01% in 1.1 μs for a 10-V step.
- Robust design: MUX-friendly inputs, RFI/EMI filtered inputs, and high input impedance when switched.
- Wide supply range: Operates from 4.5 V to 36 V.
- Rail-to-rail output: Output includes negative rail.
- Thermal stability: Specified from -40°C to 125°C.
Applications
- Battery test and measurement
- Analog input modules
- Weigh scales
- DC power supplies and AC sources
- Electronic loads
- Multifunction relays
Q & A
- What is the input offset voltage of the OPA189IDR?
The input offset voltage of the OPA189IDR is 3 μV maximum.
- What is the gain bandwidth of the OPA189IDR?
The gain bandwidth of the OPA189IDR is 14 MHz.
- What is the slew rate of the OPA189IDR?
The slew rate of the OPA189IDR is 20 V/μs.
- What is the operating temperature range of the OPA189IDR?
The operating temperature range of the OPA189IDR is from -40°C to 125°C.
- What is the quiescent current of the OPA189IDR?
The quiescent current of the OPA189IDR is 1.7 mA maximum.
- What type of package is the OPA189IDR available in?
The OPA189IDR is available in an SOIC (D) package.
- What are some typical applications of the OPA189IDR?
Typical applications include battery test, analog input modules, weigh scales, DC power supplies, AC sources, electronic loads, and multifunction relays.
- What is the common-mode rejection ratio (CMRR) of the OPA189IDR?
The CMRR of the OPA189IDR is 168 dB.
- Does the OPA189IDR have rail-to-rail output capability?
Yes, the OPA189IDR has rail-to-rail output capability.
- Is the OPA189IDR resistant to RFI/EMI?
Yes, the OPA189IDR has RFI/EMI filtered inputs.
