Overview
The OPA4228UA is a quad high precision, wide bandwidth, low noise operational amplifier produced by Texas Instruments. This device is part of the OPAx227 and OPAx228 series, which are known for combining low noise and wide bandwidth with high precision, making them ideal for applications requiring both AC and precision DC performance. The OPA4228UA is available in a SOIC (D) package with 14 pins and operates over a wide temperature range from -40°C to +85°C.
Key Specifications
| Parameter | Value |
|---|---|
| Package | SOIC (D) with 14 pins |
| Operating Temperature Range | -55°C to 125°C |
| Supply Voltage Range | ±2.5 V to ±18 V |
| Bandwidth | OPA227: 8 MHz, OPA228: 33 MHz |
| Slew Rate | OPA227: 2.3 V/µs, OPA228: 10 V/µs |
| Settling Time | 5 µs |
| CMRR | 138 dB |
| Open-Loop Gain | 160 dB |
| Input Bias Current | 10 nA maximum |
| Offset Voltage | 75 µV maximum |
| Noise | 3 nV/√Hz |
| Supply Current | 3.7 mA (x4 channels) |
| Output Current per Channel | 45 mA |
Key Features
- Low noise: 3 nV/√Hz
- Wide bandwidth: OPA227 (8 MHz), OPA228 (33 MHz)
- High slew rates: OPA227 (2.3 V/µs), OPA228 (10 V/µs)
- Fast 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 voltage range: ±2.5 V to ±18 V
- Available in single, dual, and quad versions
Applications
The OPA4228UA is an excellent choice for various applications, including professional audio equipment, portable devices requiring high precision, and any system needing both AC and precision DC performance. It is also a pin-for-pin replacement for industry-standard OP27 and OP37 operational amplifiers, offering substantial improvements across the board.
Q & A
- What is the package type of the OPA4228UA?
The OPA4228UA is available in a SOIC (D) package with 14 pins. - What is the operating temperature range of the OPA4228UA?
The operating temperature range is from -40°C to +85°C. - What are the bandwidth and slew rate specifications for the OPA4228UA?
The OPA227 has a bandwidth of 8 MHz and a slew rate of 2.3 V/µs, while the OPA228 has a bandwidth of 33 MHz and a slew rate of 10 V/µs. - What is the common-mode rejection ratio (CMRR) of the OPA4228UA?
The CMRR is 138 dB. - What is the maximum input bias current of the OPA4228UA?
The maximum input bias current is 10 nA. - What is the maximum offset voltage of the OPA4228UA?
The maximum offset voltage is 75 µV. - What is the supply voltage range for the OPA4228UA?
The supply voltage range is ±2.5 V to ±18 V. - What are some typical applications for the OPA4228UA?
Typical applications include professional audio equipment, portable devices requiring high precision, and systems needing both AC and precision DC performance. - Can the OPA4228UA replace other operational amplifiers?
Yes, it is a pin-for-pin replacement for industry-standard OP27 and OP37 operational amplifiers. - What is the noise specification of the OPA4228UA?
The noise specification is 3 nV/√Hz.
