Overview
The OPA2228UA is a dual, wide bandwidth, high precision, low noise operational amplifier produced by Texas Instruments. This component is part of the OPAx227 and OPAx228 series, which are known for their excellent performance in both AC and precision DC applications. The OPA2228UA is available in an 8-pin SOIC (D) package and operates over a temperature range of -40°C to 85°C. It is designed to be a pin-for-pin replacement for industry-standard OP27 and OP37 operational amplifiers, offering substantial improvements in various parameters.
Key Specifications
| Parameter | Value |
|---|---|
| Package | SOIC (D) with 8 pins |
| Operating Temperature Range | -40°C to 85°C |
| Noise | 3 nV/√Hz |
| 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 |
| Supply Range | ±2.5 V to ±18 V |
Key Features
- Low noise: 3 nV/√Hz
- Wide bandwidth: OPA227 (8 MHz), OPA228 (33 MHz)
- High slew rate: 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 range: ±2.5 V to ±18 V
- Available in single, dual, and quad versions
Applications
The OPA2228UA is an excellent choice for various applications requiring high precision and low noise. These include:
- Professional audio equipment: Due to its high slew rate and wide bandwidth, it is ideal for audio applications.
- Portable applications: Low quiescent current and low cost make it suitable for portable devices requiring high precision.
- General-purpose amplification: It can be used in a wide range of general-purpose amplification tasks due to its versatility and performance characteristics.
Q & A
- What is the package type of the OPA2228UA?
The OPA2228UA is available in an 8-pin SOIC (D) package.
- What is the operating temperature range of the OPA2228UA?
The operating temperature range is -40°C to 85°C.
- What are the key noise specifications of the OPA2228UA?
The noise specification is 3 nV/√Hz.
- What are the bandwidth and slew rate specifications for the OPA227 and OPA228?
For OPA227: 8 MHz bandwidth and 2.3 V/µs slew rate. For OPA228: 33 MHz bandwidth and 10 V/µs slew rate.
- What is the settling time of the OPA2228UA?
The settling time is 5 µs.
- What is the common-mode rejection ratio (CMRR) of the OPA2228UA?
The CMRR is 138 dB.
- What is the open-loop gain of the OPA2228UA?
The open-loop gain is 160 dB.
- What is the maximum input bias current of the OPA2228UA?
The maximum input bias current is 10 nA.
- What is the maximum offset voltage of the OPA2228UA?
The maximum offset voltage is 75 µV.
- What is the supply range of the OPA2228UA?
The supply range is ±2.5 V to ±18 V.
