Overview
The OPA2189IDGKT is a high-precision operational amplifier produced by Texas Instruments. It is part of the OPAx189 family, which includes the OPA189 and OPA4189. This dual-channel operational amplifier is known for its ultra-low noise, zero-drift, and fast-settling characteristics, making it ideal for precision instrumentation, signal measurement, and active filtering applications. The OPA2189IDGKT features a unique MUX-friendly input architecture and a controlled start-up system, ensuring robust performance and protection against ESD during handling and assembly.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | VSSOP (DGK) | - |
| Pins | 8 | - |
| Operating Temperature Range | -40 to 125 | °C |
| Supply Voltage | 4.5 V to 36 V, ±2.25 V to ±18 V | V |
| Offset Voltage | ±1.5 µV (maximum) | µV |
| Offset Voltage Drift | ±0.01 µV/°C (maximum) | µV/°C |
| Input Bias Current | ±70 pA (typical) | pA |
| Slew Rate | 20 V/µs | V/µs |
| Gain Bandwidth Product | 14 MHz | MHz |
| Input Voltage Noise Density | 5.2 nV/√Hz at 1 kHz | nV/√Hz |
| Quiescent Current | 1.7 mA (maximum) | mA |
| Output Type | Rail-to-Rail | - |
Key Features
- Ultra-high precision: Zero-drift of 0.005 µV/°C and ultra-low offset voltage of 3 µV maximum.
- Excellent DC precision: Common-mode rejection ratio (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-µV peak-to-peak 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 wide supply range from 4.5 V to 36 V.
- Input includes negative rail: Allows for input signals that include the negative supply rail.
Applications
The OPA2189IDGKT is well-suited for various applications requiring high precision and low noise, including:
- Precision instrumentation: High-accuracy measurement and signal processing.
- Signal measurement: Accurate signal acquisition and conditioning.
- Active filtering: High-performance filtering in audio and industrial applications.
Q & A
- What is the operating temperature range of the OPA2189IDGKT?
The operating temperature range is from -40°C to 125°C.
- What is the supply voltage range for the OPA2189IDGKT?
The supply voltage range is from 4.5 V to 36 V for single supply, and ±2.25 V to ±18 V for dual supply.
- What is the offset voltage of the OPA2189IDGKT?
The offset voltage is ±1.5 µV (maximum).
- What is the slew rate of the OPA2189IDGKT?
The slew rate is 20 V/µs.
- What is the gain bandwidth product of the OPA2189IDGKT?
The gain bandwidth product is 14 MHz.
- What is the input voltage noise density of the OPA2189IDGKT?
The input voltage noise density is 5.2 nV/√Hz at 1 kHz.
- What is the quiescent current of the OPA2189IDGKT?
The quiescent current is 1.7 mA (maximum).
- Does the OPA2189IDGKT have rail-to-rail output?
Yes, it has rail-to-rail output.
- What are the key applications of the OPA2189IDGKT?
The key applications include precision instrumentation, signal measurement, and active filtering.
- What is the package type of the OPA2189IDGKT?
The package type is VSSOP (DGK) with 8 pins.
