Overview
The OPA2333P, produced by Texas Instruments, is a Zero-Drift, low-power, rail-to-rail input and output operational amplifier. This device is optimized for low-voltage, single-supply operation and is suitable for a wide range of general-purpose applications. The OPA2333P uses a proprietary auto-calibration technique to provide ultra-low offset voltage and near-zero offset voltage drift, making it highly precise and reliable.
Key Specifications
| Parameter | Test Conditions | MIN | TYP | MAX | Unit |
|---|---|---|---|---|---|
| Operating Voltage Range | 1.8 V | 5.5 V | V | ||
| Offset Voltage (VOS) | VS = 5 V | ±2 | ±10 | µV | |
| Offset Voltage Drift (dVOS/dT) | VS = 5 V, TA = –40°C to +125°C | 0.02 | ±0.05 | µV/°C | |
| Power-Supply Rejection Ratio (PSRR) | 1.8 V ≤ VS ≤ 5.5 V, TA = –40°C to +125°C | ±5 | µV/V | ||
| Input Bias Current (IB) | ±70 | ±200 | pA | ||
| Package | WSON (8) | ||||
| Body Size | 2.00 mm × 2.00 mm | ||||
| Operating Temperature Range | –40°C | 125°C | °C |
Key Features
- Zero-Drift Architecture: Provides ultra-low offset voltage and near-zero offset voltage drift.
- Low Power Consumption: Optimized for low-voltage, single-supply operation.
- Rail-to-Rail Input and Output: Allows the input common-mode voltage range to extend 0.1 V beyond the supply rails and the output voltage to swing to within 50 mV of the supply rails.
- Unity-Gain Stable: Free from unexpected output phase reversal.
- Fast Start-Up Time: Ensures high-precision performance after 500 μs of powering the amplifier.
- Excellent CMRR: Superior common-mode rejection ratio without crossover associated with traditional complementary input stages.
- Compact Package: Available in a 2-mm × 2-mm 8-pin WSON package.
Applications
- Bidirectional Current-Sensing: Suitable for single-supply, low-side, bidirectional current-sensing applications, detecting load currents from –1 A to 1 A.
- High-Side Voltage-to-Current (V-I) Converter: Translates input voltage to output current with high dc accuracy, ideal for applications requiring precise voltage-to-current conversion.
- General-Purpose Amplification: Suitable for a wide range of general-purpose applications requiring low offset voltage and high precision.
Q & A
- What is the operating voltage range of the OPA2333P?
The OPA2333P operates over a power-supply range of 1.8 V to 5.5 V (±0.9 V to ±2.75 V).
- What is the typical offset voltage of the OPA2333P?
The typical offset voltage is ±10 µV.
- How does the OPA2333P handle input voltages beyond the supply rails?
The input common-mode voltage range extends 0.1 V beyond the supply rails. However, input voltages that exceed the power supplies must be current-limited to 1 mA or less.
- What is the start-up time of the OPA2333P?
The OPA2333P is specified to have a maximum start-up time of 500 μs.
- What package is the OPA2333P available in?
The OPA2333P is available in a 2-mm × 2-mm 8-pin WSON package.
- What is the operating temperature range of the OPA2333P?
The device is specified for operation from –40°C to 125°C.
- How does the OPA2333P perform in terms of common-mode rejection ratio (CMRR)?
The OPA2333P offers excellent CMRR without the crossover associated with traditional complementary input stages.
- What are some typical applications of the OPA2333P?
Typical applications include bidirectional current-sensing, high-side voltage-to-current (V-I) conversion, and general-purpose amplification.
- How does the OPA2333P ensure precision performance after start-up?
The device has a dedicated start-up circuit that ensures a fast, repeatable start-up for all supply conditions, allowing for reliable use in dynamic supply operation.
- What precautions should be taken in the circuit layout to optimize the performance of the OPA2333P?
To optimize performance, avoid temperature gradients, use low thermoelectric-coefficient conditions, thermally isolate components from power supplies or other heat sources, and shield the operational amplifier and input circuitry from air currents.
