Overview
The OPA4227UA/2K5 is a quad high precision, low noise operational amplifier produced by Texas Instruments. This component is part of the OPAx227 and OPAx228 series, which are known for combining low noise and wide bandwidth with high precision. These operational amplifiers are ideal for applications that require both AC and precision DC performance, making them a superior choice for professional audio equipment and portable devices that demand high accuracy.
The OPA4227UA/2K5 is a pin-for-pin replacement for the industry-standard OP27 and OP37, offering substantial improvements in key areas such as noise, bandwidth, and precision. The availability of single, dual, and quad versions allows for space-saving solutions and cost efficiency per channel.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Package | SOIC (D) | - |
| Pins | 14 | - |
| Operating Temperature Range | -40 to 85 | °C |
| Input Offset Voltage (VOS) | ±75 | µV |
| Input Bias Current | 10 | nA |
| Common Mode Rejection Ratio (CMRR) | 138 | dB |
| Open-Loop Gain | 160 | dB |
| Slew Rate (OPA227) | 2.3 | V/µs |
| Slew Rate (OPA228) | 10 | V/µs |
| Bandwidth (OPA227) | 8 | MHz |
| Bandwidth (OPA228) | 33 | MHz |
| Settling Time | 5 | µs |
| Supply Range | ±2.5 V to ±18 V | - |
Key Features
- Low noise: 3 nV/√Hz
- Wide bandwidth:
- OPA227: 8 MHz, 2.3 V/µs
- OPA228: 33 MHz, 10 V/µs
- Settling time: 5 µs
- High Common Mode Rejection Ratio (CMRR): 138 dB
- High open-loop gain: 160 dB
- Low input bias current: 10 nA maximum
- Low offset voltage: 75 µV maximum
- Wide supply range: ±2.5 V to ±18 V
- Single, dual, and quad versions available
Applications
The OPA4227UA/2K5 is particularly suited for professional audio equipment due to its low noise and high precision. It is also an excellent choice for portable applications that require high accuracy and low quiescent current. Other applications include:
- High-precision measurement instruments
- Audio preamplifiers and signal processing
- Medical equipment requiring low noise and high precision
- Industrial control systems where precision and low noise are critical
Q & A
- What is the package type of the OPA4227UA/2K5?
The OPA4227UA/2K5 is packaged in a SOIC (D) with 14 pins.
- What is the operating temperature range of the OPA4227UA/2K5?
The operating temperature range is from -40°C to 85°C.
- What is the input offset voltage of the OPA4227UA/2K5?
The input offset voltage is ±75 µV maximum.
- What are the slew rates of the OPA227 and OPA228 series?
The OPA227 series has a slew rate of 2.3 V/µs, while the OPA228 series has a slew rate of 10 V/µs.
- What are the bandwidths of the OPA227 and OPA228 series?
The OPA227 series has a bandwidth of 8 MHz, and the OPA228 series has a bandwidth of 33 MHz.
- What is the settling time of the OPA4227UA/2K5?
The settling time is 5 µs.
- What is the common mode rejection ratio (CMRR) of the OPA4227UA/2K5?
The CMRR is 138 dB.
- What is the open-loop gain of the OPA4227UA/2K5?
The open-loop gain is 160 dB.
- What is the supply range of the OPA4227UA/2K5?
The supply range is ±2.5 V to ±18 V.
- Are the OPA4227UA/2K5 and OPA4228UA/2K5 pin-for-pin replacements for any other op-amps?
Yes, they are pin-for-pin replacements for the industry-standard OP27 and OP37.
- What are some typical applications of the OPA4227UA/2K5?
Typical applications include professional audio equipment, portable devices, high-precision measurement instruments, and medical equipment.
