Overview
The OPA4251UA/2K5 is a quad operational amplifier produced by Texas Instruments, designed specifically for battery-powered, portable applications. This device is part of the OPAx251 series, which is optimized for high-power supplies. It features very low power consumption, low offset voltage, rail-to-rail output swing, high common-mode rejection, and high open-loop gain. The OPA4251UA/2K5 is suitable for a wide range of general-purpose applications, particularly where low power consumption and high performance are critical.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Package | SOIC (D) | - |
| Pins | 14 | - |
| Operating Temperature Range | -40 to 85 | °C |
| Supply Voltage (Single) | 2.7 to 36 | V |
| Supply Voltage (Dual) | ±1.35 to ±18 | V |
| Quiescent Current (IQ) | 25 | µA |
| Input Offset Voltage (VOS) | ±250 | µV |
| Common-Mode Rejection Ratio (CMRR) | 124 | dB |
| Open-Loop Gain | 128 | dB |
Key Features
- Micro power consumption: IQ = 25µA
- Single-supply operation: 2.7V to 36V
- Dual-supply operation: ±1.35V to ±18V
- Rail-to-rail output swing (within 50mV)
- Low offset voltage: ±250µV max
- High common-mode rejection: 124dB
- High open-loop gain: 128dB
- Unity-gain stable and can drive large capacitive loads
- External trim pins available for special applications (single versions only)
Applications
The OPA4251UA/2K5 is suitable for a wide range of general-purpose applications, particularly in battery-powered and portable devices. It is ideal for use in:
- Battery-powered devices
- Portable electronics
- Low-power instrumentation
- Medical devices
- Industrial control systems
Power supply pins should be bypassed with 0.01µF ceramic capacitors for optimal performance.
Q & A
- What is the operating temperature range of the OPA4251UA/2K5?
The operating temperature range is -40°C to 85°C, with operation possible from -55°C to 125°C.
- What are the supply voltage ranges for the OPA4251UA/2K5?
The device can operate from a single supply of 2.7V to 36V or a dual supply of ±1.35V to ±18V.
- What is the quiescent current (IQ) of the OPA4251UA/2K5?
The quiescent current is 25µA.
- What is the input offset voltage (VOS) of the OPA4251UA/2K5?
The input offset voltage is ±250µV max.
- What is the common-mode rejection ratio (CMRR) of the OPA4251UA/2K5?
The CMRR is 124dB.
- What is the open-loop gain of the OPA4251UA/2K5?
The open-loop gain is 128dB.
- Is the OPA4251UA/2K5 unity-gain stable?
Yes, the OPA4251UA/2K5 is unity-gain stable and can drive large capacitive loads.
- What package types are available for the OPA4251UA/2K5?
The device is available in a 14-pin SOIC (D) package.
- Are external trim pins available for the OPA4251UA/2K5?
Yes, external trim pins are provided for special applications, but only for single versions.
- What are some typical applications for the OPA4251UA/2K5?
Typical applications include battery-powered devices, portable electronics, low-power instrumentation, medical devices, and industrial control systems.
