Overview
The OP491GSZ is a quad micropower, single-supply operational amplifier manufactured by Analog Devices. It is part of the OPx91 family, which includes single, dual, and quad configurations. This amplifier is designed for low-power applications and features rail-to-rail input and output capabilities. The OP491GSZ operates from a single supply voltage ranging from 2.7 V to 12 V and is also compatible with ±5 V dual supplies. It is fabricated using Analog Devices' CBCMOS process, ensuring high performance and reliability.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Offset Voltage | VOS | −40°C ≤ TA ≤ +125°C | 80 | 700 | 1.25 mV | μV |
| Input Bias Current | IB | −40°C ≤ TA ≤ +125°C | 30 | 65 | 95 nA | nA |
| Input Offset Current | IOS | −40°C ≤ TA ≤ +125°C | 0.1 | 11 | 22 nA | nA |
| Supply Current per Amplifier | ISY | VO = 0 V, −40°C ≤ TA ≤ +125°C | 260 | 420 | 550 μA | μA |
| Slew Rate | ±SR | RL = 10 kΩ | 0.5 | V/μs | ||
| Gain Bandwidth Product | GBP | 3 | MHz | |||
| Phase Margin | θO | 45 | Degrees | |||
| Voltage Noise Density | en | f = 1 kHz | 42 | nV/√Hz | ||
| Current Noise Density | in | f = 1 kHz | 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
- Low offset voltage: 700 μV
- No phase reversal or latch-up
- High channel separation: 145 dB at 1 kHz
- Low noise performance: 42 nV/√Hz voltage noise density at 1 kHz
Applications
- Portable telecommunications equipment
- Power supply control and protection
- Medical devices and instrumentation
- Automotive systems
- Industrial control systems
- Battery-powered devices
Q & A
- What is the operating voltage range of the OP491GSZ?
The OP491GSZ operates from a single supply voltage ranging from 2.7 V to 12 V and is also compatible with ±5 V dual supplies.
- What is the typical supply current per amplifier for the OP491GSZ?
The typical supply current per amplifier is 420 μA.
- What is the gain bandwidth product of the OP491GSZ?
The gain bandwidth product is 3 MHz.
- Does the OP491GSZ have rail-to-rail input and output capabilities?
Yes, the OP491GSZ features rail-to-rail input and output capabilities.
- What is the typical slew rate of the OP491GSZ?
The typical slew rate is 0.5 V/μs.
- What are some common applications for the OP491GSZ?
Common applications include portable telecommunications equipment, power supply control and protection, medical devices, automotive systems, and industrial control systems.
- What is the phase margin of the OP491GSZ?
The phase margin is 45 degrees.
- How does the OP491GSZ perform in terms of noise?
The OP491GSZ has a voltage noise density of 42 nV/√Hz at 1 kHz and a current noise density of 0.8 pA/√Hz at 1 kHz.
- What is the typical input bias current of the OP491GSZ?
The typical input bias current is 65 nA.
- Is the OP491GSZ suitable for battery-powered devices?
Yes, the OP491GSZ is suitable for battery-powered devices due to its low power consumption and single-supply operation.
