Overview
The OPA211IDGKT is a precision operational amplifier from Texas Instruments, part of the OPAx211 series. This amplifier is renowned for its extremely low noise density of 1.1 nV/√Hz at 1 kHz and low supply current of only 3.6 mA per channel. It offers rail-to-rail output swing, maximizing dynamic range, and is suitable for a wide range of precision applications.
The OPA211IDGKT is available in a small VSSOP-8 package and operates over a wide dual-power supply range of ±2.25 to ±18 V or single-supply operation from 4.5 to 36 V. It is specified from –40°C to +125°C, making it versatile for various environmental conditions.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Noise Density | 1.1 | nV/√Hz at 1 kHz |
| Input Voltage Noise (0.1 to 10 Hz) | 80 | nV PP |
| THD + N | –136 dB | (G = 1, f = 1 kHz) |
| Offset Voltage | 125 | µV (maximum) |
| Offset Voltage Drift | 0.35 | µV/°C (typical) |
| Supply Current | 3.6 | mA/Ch (typical) |
| Gain Bandwidth Product | 80 MHz (G = 100), 45 MHz (G = 1) | |
| Slew Rate | 27 | V/µs |
| Settling Time (16-bit accuracy) | 700 ns | |
| Supply Range | ±2.25 to ±18 V, 4.5 V to 36 V | |
| Output Current | 30 | mA |
| Operating Temperature Range | –40 to 125 | °C |
| Package Type | VSSOP-8 |
Key Features
- Low voltage noise: 1.1 nV/√Hz at 1 kHz and 80 nV PP (0.1 to 10 Hz)
- High-speed performance with a gain bandwidth product of 80 MHz (G = 100) and 45 MHz (G = 1)
- Low supply current: 3.6 mA per channel (typical)
- Unity-gain stable
- Rail-to-rail output swing
- High slew rate: 27 V/µs
- Fast settling time: 700 ns to 16-bit accuracy
- Wide supply range: ±2.25 to ±18 V or 4.5 to 36 V
- High output current: 30 mA
- Low offset voltage and drift: 125 µV and 0.35 µV/°C respectively
Applications
- Precision data acquisition systems
- Driving high-precision 16-bit analog-to-digital converters (ADCs) or buffering the output of high-resolution digital-to-analog converters (DACs)
- Loop filter amplifiers in Phase-Locked Loop (PLL) applications
- High-speed and low-noise instrumentation
- Medical and scientific instruments requiring high precision and low noise
Q & A
- What is the input voltage noise density of the OPA211IDGKT?
The input voltage noise density of the OPA211IDGKT is 1.1 nV/√Hz at 1 kHz.
- What is the typical supply current of the OPA211IDGKT?
The typical supply current of the OPA211IDGKT is 3.6 mA per channel.
- What is the gain bandwidth product of the OPA211IDGKT?
The gain bandwidth product of the OPA211IDGKT is 80 MHz (G = 100) and 45 MHz (G = 1).
- What is the slew rate of the OPA211IDGKT?
The slew rate of the OPA211IDGKT is 27 V/µs.
- What is the settling time of the OPA211IDGKT to 16-bit accuracy?
The settling time of the OPA211IDGKT to 16-bit accuracy is 700 ns.
- What is the operating temperature range of the OPA211IDGKT?
The operating temperature range of the OPA211IDGKT is –40°C to +125°C.
- In what packages is the OPA211IDGKT available?
The OPA211IDGKT is available in VSSOP-8, SON-8 (3 mm × 3 mm), and SOIC-8 packages.
- What are some typical applications of the OPA211IDGKT?
The OPA211IDGKT is typically used in precision data acquisition systems, PLL applications, and for driving high-precision ADCs or DACs.
- What is the output current capability of the OPA211IDGKT?
The output current capability of the OPA211IDGKT is 30 mA.
- Does the OPA211IDGKT have rail-to-rail output swing?
Yes, the OPA211IDGKT has rail-to-rail output swing, which maximizes dynamic range.
