Overview
The OPA4251UA/2K5G4 is a quad operational amplifier produced by Texas Instruments. It is part of the OPAx251 series, which is optimized for operation with dual supplies, particularly ±15V, but also supports a wide range of supply voltages from 2.7V to 36V for single supply and ±1.35V to ±18V for dual supply. These amplifiers are designed for low power consumption and are suitable for battery-powered, portable applications.
The OPA4251UA/2K5G4 features low offset voltage, rail-to-rail output swing, high common-mode rejection, and high open-loop gain, making it versatile for various general-purpose applications.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Supply Voltage (Single Supply) | 2.7 | - | 36 | V |
| Supply Voltage (Dual Supply) | ±1.35 | - | ±18 | V |
| Operating Temperature | -40 | - | 85 | °C |
| Input Offset Voltage (OPAx241) | - | ±100 | ±250 | μV |
| Input Offset Voltage (OPAx251) | - | ±50 | ±250 | μV |
| Input Offset Voltage Drift | - | ±0.4 | ±0.6 | μV/°C |
| Power Supply Rejection Ratio (PSRR) | - | ±3 | ±30 | μV/V |
| Quiescent Current per Amplifier | - | 25 | 30 | μA |
| Input Bias Current | -4 | - | -20 | nA |
| Input Voltage Noise Density at 1 kHz | - | - | 65 | nV/√Hz |
Key Features
- Micro power consumption: 25 μA per amplifier
- Single-supply operation from 2.7V to 36V and dual-supply operation from ±1.35V to ±18V
- Rail-to-rail output swing within 50 mV of the supply rails
- Low input offset voltage: ±250 μV max for OPAx241 and ±100 μV max for OPAx251
- High common-mode rejection ratio (CMRR): 124 dB
- High open-loop gain: 128 dB
- Unity-gain stable
- Quad, dual, and single versions available (OPA4251, OPA2251, OPA251 respectively)
Applications
- Battery-operated instruments
- Portable devices
- Medical instruments
- Test equipment
- General-purpose amplification in various electronic systems
Q & A
- What is the typical quiescent current of the OPA4251UA/2K5G4?
The typical quiescent current is 25 μA per amplifier.
- What is the range of supply voltages for the OPA4251UA/2K5G4?
The OPA4251UA/2K5G4 can operate with single supplies from 2.7V to 36V and dual supplies from ±1.35V to ±18V.
- What is the input offset voltage of the OPA4251UA/2K5G4?
The input offset voltage is typically ±100 μV for the OPAx241 series and ±50 μV for the OPAx251 series, with maximum values of ±250 μV and ±250 μV respectively.
- What is the common-mode rejection ratio (CMRR) of the OPA4251UA/2K5G4?
The CMRR is 124 dB).
- What is the open-loop gain of the OPA4251UA/2K5G4?
The open-loop gain is 128 dB).
- Is the OPA4251UA/2K5G4 unity-gain stable?
Yes, the OPA4251UA/2K5G4 is unity-gain stable).
- What are the typical applications of the OPA4251UA/2K5G4?
Typical applications include battery-operated instruments, portable devices, medical instruments, and test equipment).
- What is the rail-to-rail output swing of the OPA4251UA/2K5G4?
The output swing is within 50 mV of the supply rails).
- How many channels does the OPA4251UA/2K5G4 have?
The OPA4251UA/2K5G4 is a quad operational amplifier).
- What is the input voltage noise density of the OPA4251UA/2K5G4 at 1 kHz?
The input voltage noise density at 1 kHz is 65 nV/√Hz).
