Overview
The OPA333AIDBVTG4, produced by Texas Instruments, is a micropower, 1.8-V, zero-drift CMOS precision operational amplifier. This device is part of the OPAx333 family, which utilizes a proprietary auto-calibration technique to provide very low offset voltage (10 µV maximum) and near-zero drift over time and temperature. The OPA333 is optimized for low-voltage, single-supply operation and is suitable for a wide range of general-purpose applications. It offers high-impedance inputs with a common-mode range 100 mV beyond the rails and rail-to-rail output that swings within 50 mV of the rails. The device is available in various packages, including the 5-pin SOT-23 and 8-pin SOIC, and is specified for operation from -40°C to 125°C.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VS) | 1.8 | 5.5 | V | |
| Input Offset Voltage (VOS) | 2 | 10 | µV | |
| Input Offset Voltage Drift (dVOS/dT) | 0.02 | 0.05 | µV/°C | |
| Power-Supply Rejection Ratio (PSRR) | 1 | 5 | µV/V | |
| Input Bias Current (IB) | ±70 | ±200 | nA | |
| Slew Rate (SR) | 0.16 | V/μs | ||
| Output Voltage Swing from Rail | 50 | mV | ||
| Quiescent Current per Amplifier (IQ) | 17 | 25 | µA | |
| Operating Temperature Range (TA) | -40 | 125 | °C |
Key Features
- Zero-Drift Architecture: Provides ultra-low offset voltage and near-zero offset voltage drift over time and temperature.
- Low Power Consumption: Quiescent current of 17 µA per amplifier, making it suitable for battery-powered and low-power applications.
- Rail-to-Rail Input and Output: High-impedance inputs with a common-mode range 100 mV beyond the rails and output that swings within 50 mV of the rails.
- Wide Supply Voltage Range: Operates from 1.8 V to 5.5 V (±0.9 V to ±2.75 V), supporting both single and dual supply configurations.
- High Precision: Excellent dc accuracy due to low offset voltage and low temperature drift, making it ideal for precise dc control applications.
- Unity-Gain Stable: Free from unexpected output phase reversal and suitable for a wide range of general-purpose applications.
Applications
- Analog-to-Digital Converters (ADCs): The OPA333 is optimized for driving ADCs without degradation of differential linearity, making it a superior choice for high-precision data acquisition systems.
- Medical Applications: Suitable for medical devices due to its high precision, low noise, and stability over a wide temperature range.
- Industrial Automation: Used in various industrial control systems where high accuracy and low power consumption are critical.
- Battery-Powered Devices: Ideal for battery-powered equipment due to its low quiescent current and wide supply voltage range.
- General-Purpose Amplification: Suitable for a wide range of general-purpose applications requiring high precision and low power consumption.
Q & A
- What is the maximum input offset voltage of the OPA333?
The maximum input offset voltage of the OPA333 is 10 µV.
- What is the operating temperature range of the OPA333?
The OPA333 operates from -40°C to 125°C.
- What is the quiescent current of the OPA333?
The quiescent current of the OPA333 is 17 µA per amplifier.
- What is the supply voltage range of the OPA333?
The OPA333 operates from 1.8 V to 5.5 V (±0.9 V to ±2.75 V).
- Is the OPA333 suitable for driving analog-to-digital converters (ADCs)?
Yes, the OPA333 is optimized for driving ADCs without degradation of differential linearity.
- What is the slew rate of the OPA333?
The slew rate of the OPA333 is 0.16 V/μs.
- What is the output voltage swing from the rail for the OPA333?
The output voltage swing from the rail for the OPA333 is within 50 mV of the rails.
- Is the OPA333 unity-gain stable?
Yes, the OPA333 is unity-gain stable and free from unexpected output phase reversal.
- What are the package options for the OPA333?
The OPA333 is available in 5-pin SOT-23, SOT, and 8-pin SOIC packages.
- How does the OPA333 handle thermoelectric effects?
The OPA333 requires careful layout and design to minimize thermoelectric effects, such as using low thermoelectric-coefficient materials and thermally isolating components.
