Overview
The OPA2228UA/2K5G4 is a dual, 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 ac and precision dc performance. The OPA2228 is optimized for closed-loop gains of 5 or greater, offering high speed and precision, making it an excellent choice for various applications requiring both high bandwidth and low noise.
The OPA2228 is available in an SOIC (D) package with 8 pins and operates over a wide temperature range from –40°C to +85°C. It is a pin-for-pin replacement for industry-standard OP27 and OP37 op-amps, with substantial improvements in key parameters.
Key Specifications
| Parameter | Typical Value | Unit |
|---|---|---|
| Bandwidth | 33 MHz | - |
| Slew Rate | 10 V/µs | - |
| Settling Time | 5 µs (to 0.1%) | - |
| Common-Mode Rejection Ratio (CMRR) | 138 dB | - |
| Open-Loop Gain | 160 dB | - |
| Input Bias Current | 10 nA (maximum) | - |
| Input Offset Voltage | 75 µV (maximum) | - |
| Supply Voltage Range | ±2.5 V to ±18 V | - |
| Quiescent Current per Amplifier | ±3.7 mA to ±4.2 mA | - |
| Operating Temperature Range | –40°C to +85°C | - |
| Package Type | SOIC (D) with 8 pins | - |
Key Features
- Low Noise: 3 nV/√Hz, making it suitable for high-precision applications.
- Wide Bandwidth: 33 MHz for the OPA228, and 8 MHz for the OPA227.
- High Slew Rate: 10 V/µs for the OPA228 and 2.3 V/µs for the OPA227.
- High CMRR: 138 dB, ensuring excellent common-mode rejection.
- High Open-Loop Gain: 160 dB, providing high precision in amplification.
- Low Input Bias Current: 10 nA maximum, reducing errors in high-impedance circuits.
- Low Offset Voltage: 75 µV maximum, ensuring minimal offset in output signals.
- Wide Supply Range: ±2.5 V to ±18 V, allowing flexibility in power supply design.
- Single, Dual, and Quad Versions: Available in various configurations to suit different application needs.
Applications
- Professional Audio Equipment: Ideal for rack mount audio amplifiers due to its high precision and low noise.
- Data Acquisition (DAQ): Suitable for high-precision data acquisition systems.
- Condition Monitoring Sensors: Used in sensors that require high accuracy and low noise.
- Spectrum Analyzers: Beneficial for applications requiring high bandwidth and precision.
- Industrial AC-DC Applications: Applicable in various industrial settings where high precision is crucial.
- Portable Applications: Low quiescent current makes it suitable for battery-powered devices.
Q & A
- What is the bandwidth of the OPA2228?
The OPA2228 has a bandwidth of 33 MHz.
- What is the slew rate of the OPA2228?
The slew rate of the OPA2228 is 10 V/µs.
- What is the common-mode rejection ratio (CMRR) of the OPA2228?
The CMRR of the OPA2228 is 138 dB.
- What is the input offset voltage of the OPA2228?
The input offset voltage of the OPA2228 is 75 µV maximum.
- What is the supply voltage range for the OPA2228?
The supply voltage range for the OPA2228 is ±2.5 V to ±18 V.
- What is the operating temperature range for the OPA2228?
The operating temperature range for the OPA2228 is –40°C to +85°C.
- In what package is the OPA2228 available?
The OPA2228 is available in an SOIC (D) package with 8 pins.
- Is the OPA2228 suitable for professional audio equipment?
Yes, the OPA2228 is highly suitable for professional audio equipment due to its high precision and low noise.
- Can the OPA2228 be used in portable applications?
Yes, the OPA2228 is suitable for portable applications due to its low quiescent current.
- Is the OPA2228 a pin-for-pin replacement for other op-amps?
Yes, the OPA2228 is a pin-for-pin replacement for industry-standard OP27 and OP37 op-amps.
