Overview
The OP491GS from Analog Devices Inc. is a quad micropower operational amplifier featuring single-supply operation and rail-to-rail input and output capabilities. This amplifier is part of the OPx91 family, which includes single, dual, and quad configurations. The OP491GS is fabricated on Analog Devices’ CBCMOS process and is designed to operate from a single supply of 2.7 V to 12 V, as well as from dual supplies of ±5 V. It is known for its low power consumption, wide bandwidth, and robust input stage that allows input voltages to safely extend 10 V beyond either supply without phase inversion or latch-up.
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 |
| Input Offset Current | IOS | −40°C ≤ TA ≤ +125°C | 0.1 | 11 | 22 | nA |
| Supply Voltage | V_S | 2.7 | 12 | V | ||
| Bandwidth | 3 | MHz | ||||
| Slew Rate | 0.5 | V/μs | ||||
| Output Current per Channel | 16 | mA |
Key Features
- Single-supply operation: 2.7 V to 12 V and dual-supply operation: ±5 V.
- Rail-to-rail input and output capabilities, allowing the output voltage to swing to within millivolts of the supplies.
- Low supply current: 300 μA per amplifier.
- Wide bandwidth: 3 MHz and slew rate: 0.5 V/μs.
- Low offset voltage: 700 μV and low input bias current: 65 nA.
- No phase reversal and latch-up protection, even when the input voltage extends 10 V beyond either supply.
Applications
- Portable telecommunications equipment.
- Power supply control and protection.
- Interface for transducers with wide output ranges, including Hall effect, piezo electric, and resistive transducers.
Q & A
- What is the supply voltage range for the OP491GS?
The OP491GS operates from a single supply of 2.7 V to 12 V and from dual supplies of ±5 V.
- What is the bandwidth of the OP491GS?
The bandwidth of the OP491GS is 3 MHz).
- What is the slew rate of the OP491GS?
The slew rate of the OP491GS is 0.5 V/μs).
- What are the key features of the OP491GS's input stage?
The input stage allows the input voltage to safely extend 10 V beyond either supply without phase inversion or latch-up. It also features rail-to-rail input capabilities).
- What are some typical applications for the OP491GS?
Typical applications include portable telecommunications equipment, power supply control and protection, and interfaces for transducers with wide output ranges).
- What is the output current per channel for the OP491GS?
The output current per channel for the OP491GS is up to 16 mA).
- What is the package type for the OP491GS?
The OP491GS is available in a 14-pin SOIC package).
- What are the noise performance characteristics of the OP491GS?
The OP491GS has a voltage noise density of 42 nV/√Hz at 1 kHz and a current noise density of 0.8 pA/√Hz).
- Is the OP491GS compliant with industry standards and regulations?
The OP491GS complies with regulations such as RoHS (2011/65/EU, 2015/863)).
- What is the operating temperature range for the OP491GS?
The OP491GS operates over a temperature range of −40°C to +125°C).
