Overview
The OPA333AIDCKT from 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 and near-zero drift over time and temperature. The OPA333AIDCKT is optimized for low-voltage, single-supply operation and is suitable for a wide range of general-purpose applications. It operates from a power-supply range of 1.8 V to 5.5 V and is available in the SC70-5 package.
Key Specifications
| Parameter | Test Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Offset Voltage (VOS) | VS = 5 V | 2 | 10 | - | μV |
| Input Offset Voltage Drift (dVOS/dT) | TA = –40°C to 125°C | 0.02 | 0.05 | - | μV/°C |
| Power-Supply Rejection Ratio (PSRR) | VS = 1.8 V to 5.5 V, TA = –40°C to 125°C | 1 | 5 | - | μV/V |
| Input Bias Current (IB) | TA = 25°C | ±70 | ±200 | - | pA |
| Slew Rate (SR) | G = +1 | 0.16 | - | - | V/μs |
| Output Voltage Swing from Rail | RL = 10 kΩ | 30 | 50 | - | mV |
| Short-Circuit Current (ISC) | - | ±5 | - | - | mA |
| Quiescent Current per Amplifier (IQ) | IO = 0 A | 17 | 25 | - | μA |
| Operating Temperature Range (TA) | - | –40 | 125 | - | °C |
| Storage Temperature Range (Tstg) | - | –65 | 150 | - | °C |
Key Features
- Zero-Drift architecture providing ultra-low offset voltage and near-zero offset voltage drift.
- Unity-gain stable and free from output phase reversal.
- Operates from 1.8 V to 5.5 V (±0.9 V to ±2.75 V) power-supply range.
- Rail-to-rail input and output stages with high-impedance inputs and a common-mode range 100 mV beyond the rails.
- Low quiescent current of 17 μA to 25 μA per amplifier.
- Excellent common-mode rejection ratio (CMRR) without the crossover associated with traditional complementary input stages.
- Suitable for driving analog-to-digital converters (ADCs) without degradation of differential linearity.
- Available in SC70-5 package.
- Specified for operation from –40°C to 125°C.
Applications
- Temperature Measurements: The low offset voltage and drift make it ideal for precise temperature measurements.
- Electronic Scales: Suitable for applications requiring high precision and low drift.
- Medical Instrumentation: Used in medical devices where accuracy and stability are crucial.
- Battery-Powered Instruments: Low power consumption makes it suitable for battery-powered devices.
- Handheld Test Equipment: Ideal for portable test equipment due to its low power and high precision.
- High-Side Voltage-to-Current (V-I) Converters: The OPA333AIDCKT is used in V-I converters for accurate dc control.
Q & A
- What is the operating voltage range of the OPA333AIDCKT? The OPA333AIDCKT operates from 1.8 V to 5.5 V (±0.9 V to ±2.75 V).
- What is the typical input offset voltage of the OPA333AIDCKT? The typical input offset voltage is 10 μV.
- What is the input offset voltage drift of the OPA333AIDCKT? The input offset voltage drift is 0.02 μV/°C to 0.05 μV/°C.
- What is the quiescent current of the OPA333AIDCKT? The quiescent current is 17 μA to 25 μA per amplifier.
- What are the available packages for the OPA333AIDCKT? The OPA333AIDCKT is available in the SC70-5 package.
- What is the operating temperature range of the OPA333AIDCKT? The operating temperature range is –40°C to 125°C.
- Is the OPA333AIDCKT suitable for driving analog-to-digital converters (ADCs)? Yes, it is optimized for driving ADCs without degradation of differential linearity.
- What is the slew rate of the OPA333AIDCKT? The slew rate is 0.16 V/μs.
- How much short-circuit current can the OPA333AIDCKT handle? The short-circuit current is ±5 mA.
- What is the storage temperature range of the OPA333AIDCKT? The storage temperature range is –65°C to 150°C.
- Is the OPA333AIDCKT free from output phase reversal? Yes, it is unity-gain stable and free from output phase reversal.
