Overview
The AD8691AUJZ-REEL7, produced by Analog Devices Inc., is a low-cost, single, rail-to-rail output, single-supply operational amplifier. This device is part of the AD8691, AD8692, and AD8694 family, known for their low offset and input voltages, low current noise, and wide signal bandwidth. The AD8691 is particularly suited for applications requiring high performance and low power consumption, making it ideal for a variety of uses including photodiode amplification, battery-powered instrumentation, medical instruments, and portable audio devices.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Offset Voltage Drift | 2 µV/°C to 12 µV/°C | -40°C to +125°C |
| Input Bias Current | 1 pA maximum | - |
| Noise | 8 nV/√Hz | - |
| Distortion | 0.0006% | - |
| Bandwidth | 10 MHz | - |
| Supply Voltage Range | 2.7 V to 6 V | - |
| Supply Current per Amplifier | 0.95 mA to 1.05 mA | VO = 0 V, -40°C to +125°C |
| Output Voltage High | 4.96 V to 4.98 V (IL = 1 mA) | RL = 2 kΩ, VCM = 0 V |
| Output Voltage Low | 20 mV to 40 mV (IL = 1 mA) | RL = 2 kΩ, VCM = 0 V |
| Short-Circuit Current | ±80 mA | - |
| Slew Rate | 5 V/µs | RL = 2 kΩ |
| Settling Time | 1 µs to 0.01% | - |
Key Features
- Low Offset and Input Voltages: The AD8691 features low offset voltage and low input bias currents, making it suitable for precision applications.
- Low Noise and Distortion: With a noise level of 8 nV/√Hz and distortion as low as 0.0006%, this amplifier is ideal for high-fidelity audio and other sensitive applications.
- Wide Bandwidth: The amplifier has a bandwidth of 10 MHz, ensuring high-speed performance.
- Single-Supply Operation: It operates on a single supply voltage ranging from 2.7 V to 6 V.
- Rail-to-Rail Output: The output voltage can swing close to the supply rails, maximizing dynamic range.
- Compact Packaging: Available in small SC70 and TSOT packages, which are beneficial for space-constrained designs.
- Extended Industrial Temperature Range: Specified to operate over -40°C to +125°C, making it suitable for harsh environments.
Applications
- Photodiode Amplification: Ideal for amplifying signals from photodiodes due to its low noise and high gain.
- Battery-Powered Instrumentation: Suitable for portable and battery-powered devices due to its low power consumption.
- Medical Instruments: Used in medical devices requiring high precision and low noise.
- Portable Audio Devices: Benefits from its wide bandwidth and low distortion, making it suitable for audio amplification in portable devices.
- Sensors and High Impedance Sources: Useful for amplifying signals from high impedance sources such as sensors.
- Power Amplifier Controls and Laser Diode Control Loops: Applied in control loops for power amplifiers and laser diodes.
- ASIC Input and Output Amplifiers: Used as input and output amplifiers in Application-Specific Integrated Circuits (ASICs).
Q & A
- What is the typical offset voltage drift of the AD8691?
The typical offset voltage drift of the AD8691 is 2 µV/°C to 12 µV/°C over the temperature range of -40°C to +125°C.
- What is the input bias current of the AD8691?
The input bias current of the AD8691 is 1 pA maximum.
- What is the noise level of the AD8691?
The noise level of the AD8691 is 8 nV/√Hz.
- What is the bandwidth of the AD8691?
The bandwidth of the AD8691 is 10 MHz.
- What is the supply voltage range of the AD8691?
The supply voltage range of the AD8691 is from 2.7 V to 6 V.
- What are the typical applications of the AD8691?
The AD8691 is typically used in photodiode amplification, battery-powered instrumentation, medical instruments, portable audio devices, and as amplifiers for high impedance sources.
- What are the package options for the AD8691?
The AD8691 is available in 5-lead SC70 and 5-lead TSOT packages.
- What is the operating temperature range of the AD8691?
The AD8691 operates over an extended industrial temperature range of -40°C to +125°C.
- What is the slew rate of the AD8691?
The slew rate of the AD8691 is 5 V/µs.
- What is the settling time of the AD8691 to 0.01%?
The settling time of the AD8691 to 0.01% is 1 µs.
