Overview
The OP491GPZ, produced by Analog Devices Inc., is a quad micropower, single-supply operational amplifier featuring rail-to-rail inputs and outputs. This amplifier is part of the OPx91 family, which includes single (OP191), dual (OP291), and quad (OP491) configurations. The OP491GPZ is designed for low power consumption and high performance, making it suitable for a variety of applications requiring precision and reliability.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Supply Voltage | VS | 2.7 | 12 | V | ||
| Offset Voltage | VOS | −40°C ≤ TA ≤ +125°C | 80 | 700 | 1.25 | μV |
| Input Bias Current | IB | −40°C ≤ TA ≤ +125°C | 30 | 65 | 95 | nA |
| Supply Current/Amplifier | ISY | VO = 0 V, −40°C ≤ TA ≤ +125°C | 260 | 420 | 550 | μA |
| Slew Rate | ±SR | RL = 10 kΩ | 0.5 | V/μs | ||
| Bandwidth | 3 | MHz | ||||
| Phase Margin | θO | 45 | Degrees | |||
| Channel Separation | CS | f = 1 kHz, RL = 10 kΩ | 145 | dB | ||
| Voltage Noise Density | en | f = 1 kHz | 42 | nV/√Hz | ||
| Current Noise Density | in | 0.8 | pA/√Hz |
Key Features
- Single-supply operation: 2.7 V to 12 V
- Rail-to-rail input and output swing
- Low supply current: 300 μA/amp
- Wide bandwidth: 3 MHz
- Slew rate: 0.5 V/μs
- Low offset voltage: 700 μV
- No phase reversal for inputs beyond the supply rails
- High channel separation: 145 dB at 1 kHz
Applications
The OP491GPZ is suitable for various applications, including:
- Portable telecommunications equipment
- Power supply control and protection
- Instrumentation and measurement systems
- Audio and video processing
- Medical devices and diagnostic equipment
Q & A
- What is the supply voltage range for the OP491GPZ?
The OP491GPZ operates from a single supply voltage of 2.7 V to 12 V. - What is the typical offset voltage of the OP491GPZ?
The typical offset voltage is 700 μV. - What is the slew rate of the OP491GPZ?
The slew rate is 0.5 V/μs. - What is the bandwidth of the OP491GPZ?
The bandwidth is 3 MHz. - Does the OP491GPZ have rail-to-rail input and output?
Yes, the OP491GPZ features rail-to-rail input and output swing. - What is the typical supply current per amplifier for the OP491GPZ?
The typical supply current per amplifier is 420 μA. - What is the phase margin of the OP491GPZ?
The phase margin is 45 degrees. - What is the channel separation of the OP491GPZ at 1 kHz?
The channel separation is 145 dB at 1 kHz. - Is the OP491GPZ suitable for portable telecommunications equipment?
Yes, it is suitable for portable telecommunications equipment among other applications. - What is the voltage noise density of the OP491GPZ at 1 kHz?
The voltage noise density is 42 nV/√Hz at 1 kHz.
