Overview
The OPA234UA/2K5 is a low-power, low-cost operational amplifier (op amp) from Texas Instruments. It is part of the OPA234 series, which is designed for single-supply, low-voltage, and low-power applications. These op amps are ideal for use in portable and battery-powered devices due to their low quiescent current and high accuracy.
The OPA234UA/2K5 is available in an 8-pin SOIC (Small Outline Integrated Circuit) package, making it suitable for space-constrained designs. The device operates over a wide supply voltage range, from +2.7V to +36V for single supply and ±1.35V to ±18V for dual supply, with excellent performance characteristics.
Key Specifications
| Parameter | Condition | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Input Offset Voltage (VOS) | VCM = 2.5V | ±40 | ±100 | ±250 | µV |
| Input Bias Current (IB) | VCM = 1.35V | –15 | –30 | –50 | nA |
| Power Supply Rejection Ratio (PSRR) | VS = +2.7V to +30V, VCM = 1.7V | 3 | 10 | 20 | µV/V |
| Common-Mode Rejection Ratio (CMRR) | VS = +2.7V, –0.3V < VCM < 3V | 62 | 74 | dB | |
| Open-Loop Voltage Gain (AOL) | RL = 10kΩ, 10mV < VO < (V+) – 10mV | 100 | 124 | dB | |
| Gain-Bandwidth Product (GBW) | G = 1 | 1 | MHz | ||
| Slew Rate (SR) | 1 | V/µs | |||
| Quiescent Current (IQ) | IO = 0A | 150 | 250 | 300 | µA |
| Operating Temperature Range | –40 | +85 | °C | ||
| Storage Temperature Range | –55 | +125 | °C | ||
| Thermal Resistance (θJA) | SO-8 Surface-Mount | 150 | °C/W |
Key Features
- Low Quiescent Current: The OPA234UA/2K5 has a low quiescent current of 250µA per amplifier, making it suitable for battery-powered devices.
- Low Input Bias Current: With an input bias current of –15 to –50 nA, it minimizes the impact on the input signal.
- Low Offset Voltage: The device features a low input offset voltage of ±40 to ±250 µV, ensuring high accuracy in applications.
- High CMRR and PSRR: High common-mode rejection ratio (CMRR) and power supply rejection ratio (PSRR) provide excellent noise immunity and stability.
- Wide Supply Voltage Range: Operates from single (+2.7V to +36V) or dual (±1.35V to ±18V) supplies, offering flexibility in design.
- Unity-Gain Stable: Suitable for a wide range of general-purpose applications with excellent phase margin.
- Independent Circuitry: Dual and quad versions feature completely independent circuitry, minimizing crosstalk and interaction between channels.
Applications
- Portable and Battery-Powered Devices: Ideal for use in devices where low power consumption is critical.
- General-Purpose Amplification: Suitable for a wide range of applications requiring high accuracy and low noise.
- Audio and Signal Processing: Can be used in audio circuits and signal processing applications due to its high CMRR and PSRR.
- Medical Devices: Applicable in medical devices where low power and high accuracy are essential.
- Industrial Automation: Used in various industrial automation applications requiring reliable and precise signal amplification.
Q & A
- What is the typical quiescent current of the OPA234UA/2K5?
The typical quiescent current is 250µA per amplifier.
- What is the input offset voltage range of the OPA234UA/2K5?
The input offset voltage range is ±40 to ±250 µV.
- What is the operating temperature range of the OPA234UA/2K5?
The operating temperature range is –40°C to +85°C.
- What are the package options for the OPA234UA/2K5?
The device is available in an 8-pin SOIC package.
- What is the gain-bandwidth product of the OPA234UA/2K5?
The gain-bandwidth product is 1 MHz.
- Is the OPA234UA/2K5 suitable for high load capacitance applications?
Yes, it is suitable for demanding applications, including those with high load capacitance.
- What is the slew rate of the OPA234UA/2K5?
The slew rate is 1 V/µs.
- Can the OPA234UA/2K5 operate from dual supplies?
Yes, it can operate from dual supplies ranging from ±1.35V to ±18V.
- What is the thermal resistance of the SO-8 surface-mount package?
The thermal resistance is 150°C/W.
- Is the OPA234UA/2K5 unity-gain stable?
Yes, it is unity-gain stable and suitable for a wide range of general-purpose applications.
