Overview
The OPA2228, produced by Texas Instruments, is part of the OPAx227 and OPAx228 series of operational amplifiers. These amplifiers are known for their low noise, wide bandwidth, and high precision, making them ideal for applications that require both AC and precision DC performance. The OPA2228 is particularly optimized for closed-loop gains of 5 or greater, offering higher speed with a slew rate of 10 V/µs and a bandwidth of 33 MHz. This dual operational amplifier is available in 8-pin SOIC and PDIP packages and operates over a wide temperature range from –40°C to +85°C.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Number of Circuits | 2 | |
| Package Type | 8-SOIC (0.154", 3.90mm Width) | |
| Slew Rate | 11 V/µs | V/µs |
| Gain Bandwidth Product | 33 MHz | MHz |
| Input Bias Current | 2.5 nA | nA |
| Input Offset Voltage | 5 µV | µV |
| Supply Voltage Range | ±2.5 V to ±18 V | V |
| Operating Temperature Range | –40°C to +85°C | °C |
| Output Current per Channel | 45 mA | mA |
| Supply Current | 3.7 mA | mA |
Key Features
- Low noise: 3 nV/√Hz
- Wide bandwidth: 33 MHz for OPA228 series
- High slew rate: 10 V/µs for OPA228 series
- 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
- Data acquisition (DAQ)
- Condition monitoring sensors
- Spectrum analyzers
- Professional audio equipment (rack mount)
- Industrial AC-DC applications
- Portable applications requiring high precision
Q & A
- What is the slew rate of the OPA2228? The slew rate of the OPA2228 is 11 V/µs.
- What is the gain bandwidth product of the OPA2228? The gain bandwidth product of the OPA2228 is 33 MHz.
- What is the input bias current of the OPA2228? The input bias current of the OPA2228 is 2.5 nA.
- What is the input offset voltage of the OPA2228? The input offset voltage of the OPA2228 is 5 µV.
- 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.
- What are the typical applications of the OPA2228? Typical applications include data acquisition, condition monitoring sensors, spectrum analyzers, professional audio equipment, and industrial AC-DC applications.
- Is the OPA2228 available in different package types? Yes, the OPA2228 is available in 8-pin SOIC and PDIP packages.
- What is the common-mode rejection ratio (CMRR) of the OPA2228? The CMRR of the OPA2228 is 138 dB.
- What is the open-loop gain of the OPA2228? The open-loop gain of the OPA2228 is 160 dB.
