Overview
The OPA4228UA/2K5G4 from Texas Instruments is a quad high-precision, wide bandwidth, low noise operational amplifier. This device is part of the OPAx227 and OPAx228 series, which combine low noise and wide bandwidth with high precision, making them ideal for applications requiring both AC and precision DC performance.
The OPA4228 is available in a SOIC (D) package with 14 pins and operates over a temperature range of –40°C to +85°C. It is a pin-for-pin replacement for industry-standard op-amps like the OP27 and OP37, offering substantial improvements across various parameters.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Package | SOIC (D) | - |
| Pins | 14 | - |
| Operating Temperature Range | –40°C to +85°C | °C |
| Input Offset Voltage (VOS) | ±75 µV (max) | µV |
| Input Bias Current | 10 nA (max) | nA |
| Common Mode Rejection Ratio (CMRR) | 138 dB | dB |
| Open-Loop Gain (AOL) | 160 dB | dB |
| Bandwidth (OPA227) | 8 MHz | MHz |
| Slew Rate (OPA227) | 2.3 V/µs | V/µs |
| Bandwidth (OPA228) | 33 MHz | MHz |
| Slew Rate (OPA228) | 10 V/µs | V/µs |
| Settling Time | 5 µs | µs |
| Supply Range | ±2.5 V to ±18 V | V |
| Noise | 3 nV/√Hz | nV/√Hz |
Key Features
- Low noise: 3 nV/√Hz
- Wide bandwidth:
- OPA227: 8 MHz, 2.3 V/µs
- OPA228: 33 MHz, 10 V/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
- Fast settling time: 5 µs
Applications
- Data acquisition (DAQ)
- Condition monitoring sensors
- Spectrum analyzers
- Professional audio equipment (rack mount)
- Industrial AC-DC power supplies
- Telecom equipment
- Geophysical analysis
- Vibration analysis
- Spectral analysis
- Active filters
- Power supply control
Q & A
- What is the operating temperature range of the OPA4228UA/2K5G4?
The operating temperature range is –40°C to +85°C.
- What is the input offset voltage of the OPA4228UA/2K5G4?
The input offset voltage is ±75 µV maximum.
- What are the bandwidth and slew rate for the OPA227 and OPA228?
For OPA227: 8 MHz bandwidth, 2.3 V/µs slew rate. For OPA228: 33 MHz bandwidth, 10 V/µs slew rate.
- What is the common-mode rejection ratio (CMRR) of the OPA4228UA/2K5G4?
The CMRR is 138 dB.
- What is the supply voltage range for the OPA4228UA/2K5G4?
The supply voltage range is ±2.5 V to ±18 V.
- What are some typical applications for the OPA4228UA/2K5G4?
Typical applications include data acquisition, condition monitoring sensors, spectrum analyzers, professional audio equipment, and industrial AC-DC power supplies.
- What is the noise level of the OPA4228UA/2K5G4?
The noise level is 3 nV/√Hz.
- Is the OPA4228UA/2K5G4 available in different package types?
- What is the settling time of the OPA4228UA/2K5G4?
The settling time is 5 µs.
- Can the OPA4228UA/2K5G4 replace other industry-standard op-amps?
