Overview
The OPA211IDRGT is a precision operational amplifier from Texas Instruments, known for its low noise and high precision characteristics. This device is part of the OPAx211 series, which includes single and dual-channel versions. The OPA211IDRGT is optimized for low noise and wide bandwidth, making it suitable for a variety of high-precision applications. It features a low input voltage noise of 1.1 nV/√Hz and a high common-mode rejection ratio (CMRR) of up to 120 dB, ensuring excellent signal integrity and stability. The amplifier operates over a wide power supply range from ±2.25 V to ±18 V or from 4.5 V to 36 V in single-supply configurations, and it is specified over a temperature range of –40°C to +125°C.
Key Specifications
| Parameter | Conditions | Min | Max | Unit | |
|---|---|---|---|---|---|
| Input Offset Voltage (VOS) | VS = ±15 V | ±30 | ±125 | ±50 | μV |
| Input Offset Drift (dVOS/dT) | VS = ±15 V, TA = –40°C to +125°C | 0.35 | 1.5 | 0.85 | μV/°C |
| Input Voltage Noise (en) | f = 0.1 Hz to 10 Hz | 80 | nVPP | ||
| Input Voltage Noise Density | f = 10 Hz | 2 | nV/√Hz | ||
| Input Voltage Noise Density | f = 1 kHz | 1.1 | nV/√Hz | ||
| Input Bias Current (IB) | VCM = 0 V | ±60 | ±175 | ±125 | nA |
| Common-Mode Rejection Ratio (CMRR) | VS ≥ ±5 V, TA = –40°C to +125°C | 114 | 120 | dB | |
| Open-Loop Gain (AOL) | (V–) + 0.6 V ≤ VO ≤ (V+) – 0.6 V, RL = 10 kΩ | 110 | 114 | dB | |
| Quiescent Current (IQ) | IOUT = 0 A, TA = –40°C to +125°C | 3.6 | 4.5 | 6 | mA |
| Operating Temperature Range | –40°C | +125°C | °C |
Key Features
- Low Noise: The OPA211IDRGT features very low input voltage noise of 1.1 nV/√Hz, making it ideal for high-precision applications.
- High Precision: With an input offset voltage as low as ±30 μV and an offset drift of 0.35 μV/°C, this amplifier ensures high accuracy.
- Wide Power Supply Range: Operates from ±2.25 V to ±18 V or from 4.5 V to 36 V in single-supply configurations.
- High CMRR: A common-mode rejection ratio of up to 120 dB enhances signal integrity.
- Low Input Bias Current: Input bias current as low as ±60 nA minimizes the impact on the input signal.
- Compact Packaging: Available in small packages such as SON-8 (3 mm × 3 mm), VSSOP-8, and SOIC-8.
- Shutdown Function: Features an active high shutdown pin to disable the device when not in use.
Applications
- Precision Data Acquisition: Ideal for driving high-precision 16-bit analog-to-digital converters (ADCs) and buffering the output of high-resolution digital-to-analog converters (DACs).
- PLL Applications: Suitable as a loop filter amplifier in phase-locked loop (PLL) applications.
- High-Resolution Audio and Video: Used in audio and video processing where low noise and high precision are critical.
- Medical and Scientific Instruments: Applicable in medical and scientific equipment requiring high signal fidelity and low noise.
- Industrial Automation: Employed in industrial automation systems where precise signal processing is necessary.
Q & A
- What is the input voltage noise of the OPA211IDRGT?
The input voltage noise of the OPA211IDRGT is 1.1 nV/√Hz at 1 kHz and 80 nVPP from 0.1 Hz to 10 Hz.
- What is the operating temperature range of the OPA211IDRGT?
The OPA211IDRGT operates over a temperature range of –40°C to +125°C.
- What are the available package options for the OPA211IDRGT?
The OPA211IDRGT is available in SON-8 (3 mm × 3 mm), VSSOP-8, and SOIC-8 packages.
- What is the quiescent current of the OPA211IDRGT?
The quiescent current of the OPA211IDRGT is 3.6 mA to 4.5 mA per channel at IOUT = 0 A.
- Does the OPA211IDRGT have a shutdown function?
Yes, the OPA211IDRGT features an active high shutdown pin to disable the device when not in use.
- What is the common-mode rejection ratio (CMRR) of the OPA211IDRGT?
The CMRR of the OPA211IDRGT is up to 120 dB.
- What are some typical applications of the OPA211IDRGT?
The OPA211IDRGT is typically used in precision data acquisition, PLL applications, high-resolution audio and video, medical and scientific instruments, and industrial automation.
- What is the input bias current of the OPA211IDRGT?
The input bias current of the OPA211IDRGT is ±60 nA to ±175 nA.
- What is the open-loop gain of the OPA211IDRGT?
The open-loop gain of the OPA211IDRGT is 110 dB to 114 dB for RL = 10 kΩ.
- Can the OPA211IDRGT operate on a single power supply?
Yes, the OPA211IDRGT can operate on a single power supply from 4.5 V to 36 V.
