Overview
The OPA211AIDR is a precision operational amplifier produced by Texas Instruments. It is part of the OPAx211 series, known for its extremely low voltage noise and high-speed performance. This amplifier achieves a very low noise density of 1.1 nV/√Hz at 1 kHz and operates with a supply current of only 3.6 mA per channel. The OPA211AIDR features rail-to-rail output swing, maximizing dynamic range, and is suitable for a wide range of precision applications, including data acquisition, PLL loop filters, and high-resolution ADC and DAC interfaces.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Noise Density at 1 kHz | 1.1 | nV/√Hz |
| Input Voltage Noise (0.1 to 10 Hz) | 80 | nVPP |
| THD + N (G = 1, ƒ = 1 kHz) | –136 | dB |
| Offset Voltage | 125 | µV (maximum) |
| Offset Voltage Drift | 0.35 | µV/°C (typical) |
| Supply Current per Channel | 3.6 | mA (typical) |
| Gain Bandwidth Product | 80 MHz (G = 100), 45 MHz (G = 1) | MHz |
| Slew Rate | 27 | V/µs |
| Settling Time to 16-Bit Accuracy | 700 | ns |
| Supply Voltage Range | ±2.25 to ±18 V, 4.5 V to 36 V | V |
| Output Current | 30 | mA |
| Operating Temperature Range | –40 to 125 | °C |
| Package Types | SON-8, VSSOP-8, SOIC-8 |
Key Features
- Extremely low voltage noise: 1.1 nV/√Hz at 1 kHz
- Low supply current: 3.6 mA per channel (typical)
- Rail-to-rail output swing for maximum dynamic range
- High-speed performance with a gain bandwidth product of 80 MHz (G = 100) and 45 MHz (G = 1)
- Fast slew rate of 27 V/µs
- Quick settling time to 16-bit accuracy: 700 ns
- Wide supply voltage range: ±2.25 to ±18 V, or 4.5 to 36 V for single-supply operation
- Unity-gain stable and shutdown capability
- Available in compact packages: SON-8, VSSOP-8, and SOIC-8
Applications
- Precision data acquisition applications
- Loop filter amplifiers in PLL applications
- Driving high-precision 16-bit analog-to-digital converters (ADCs) or buffering the output of high-resolution digital-to-analog converters (DACs)
- Ultrasound scanners
- Semiconductor testing
- X-ray systems
- Lab and field instrumentation
- Radar and wireless communications testing
- Seismic data acquisition
- DC power supplies, AC sources, and electronic loads
- Power analyzers and source measurement units (SMUs)
Q & A
- What is the input voltage noise density of the OPA211AIDR at 1 kHz?
The input voltage noise density is 1.1 nV/√Hz at 1 kHz.
- What is the typical supply current per channel for the OPA211AIDR?
The typical supply current per channel is 3.6 mA.
- What is the gain bandwidth product of the OPA211AIDR?
The gain bandwidth product is 80 MHz (G = 100) and 45 MHz (G = 1).
- What is the slew rate of the OPA211AIDR?
The slew rate is 27 V/µs.
- What is the settling time to 16-bit accuracy for the OPA211AIDR?
The settling time to 16-bit accuracy is 700 ns.
- What is the operating temperature range for the OPA211AIDR?
The operating temperature range is –40°C to 125°C.
- In what packages is the OPA211AIDR available?
The OPA211AIDR is available in SON-8, VSSOP-8, and SOIC-8 packages.
- What are some common applications for the OPA211AIDR?
Common applications include precision data acquisition, PLL loop filters, driving high-precision ADCs and DACs, ultrasound scanners, semiconductor testing, and more.
- What is the output current capability of the OPA211AIDR?
The output current capability is 30 mA.
- Does the OPA211AIDR have a shutdown feature?
Yes, the OPA211AIDR has a shutdown feature, which is active high.
