Overview
The AD8691AUJZ-R2, 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 precision and low noise, making it ideal for a variety of uses including photodiode amplification, battery-powered instrumentation, medical instruments, and portable audio devices.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Offset Voltage | VOS | −0.3 V < VCM < +1.6 V | 0.4 | 2.2 | mV | |
| Offset Voltage Drift | ∆VOS/∆T | −40°C < TA < +125°C | 2 | 12 | µV/°C | |
| Input Bias Current | IB | −40°C < TA < +125°C | 0.1 | 1 | pA | |
| Input Offset Current | IOS | −40°C < TA < +125°C | 0.1 | 0.5 | pA | |
| Input Voltage Range | IVR | −0.3 | +1.6 | V | ||
| Common-Mode Rejection Ratio | CMRR | VCM = −0.3 V to +1.6 V | 60 | 85 | dB | |
| Large Signal Voltage Gain | AVO | RL = 2 kΩ, VO = 0.5 V to 2.2 V | 90 | 250 | V/mV | |
| Output Voltage High | VOH | IL = 1 mA | 2.64 | 2.66 | V | |
| Output Voltage Low | VOL | IL = 1 mA | 25 | 40 | mV | |
| Short-Circuit Current | ISC | ±20 | mA | |||
| Power Supply Rejection Ratio | PSRR | VS = 2.7 V to 5.5 V | 75 | 95 | dB | |
| Supply Current/Amplifier | ISY | VO = 0 V | 0.85 | 0.95 | mA | |
| Slew Rate | SR | RL = 2 kΩ | 5 | V/µs | ||
| Settling Time | tS | To 0.01% | 1 | µs |
Key Features
- Low Offset Voltage: Maximum offset voltage of 2.2 mV and low offset voltage drift of 2 to 12 µV/°C.
- Low Input Bias Current: Very low input bias currents of 1 pA maximum.
- Low Noise: Low noise performance with 8 nV/√Hz at 1 kHz.
- Low Distortion: High linearity with 0.0006% distortion.
- Wide Bandwidth: Unity-gain stable with a bandwidth of 10 MHz.
- Single-Supply Operation: Operates from a single supply of 2.7 V to 6 V.
- Rail-to-Rail Output: Rail-to-rail output swing for maximum signal range.
- High Speed: Slew rate of 5 V/µs and settling time to 0.01% in 1 µs.
- Compact Packaging: Available in small SC70 and TSOT packages, reducing external noise pickup.
Applications
- Photodiode Amplification: Ideal for amplifying signals from photodiodes.
- Battery-Powered Instrumentation: Suitable for portable and battery-powered devices due to low power consumption.
- Medical Instruments: Used in medical devices requiring high precision and low noise.
- Sensors and Filters: Beneficial for high impedance sensors and multipole filters.
- Portable Audio Devices: Enhances audio quality in portable devices with its wide bandwidth and low distortion.
- Power Amplifier Controls and Laser Diode Control Loops: Used in control loops for power amplifiers and laser diodes.
- ASIC Input and Output Amplifiers: Suitable for input and output stages of ASICs.
Q & A
- What is the typical offset voltage of the AD8691AUJZ-R2?
The typical offset voltage is 2.2 mV.
- What is the input bias current of the AD8691AUJZ-R2?
The input bias current is 1 pA maximum.
- What is the noise performance of the AD8691AUJZ-R2?
The noise performance is 8 nV/√Hz at 1 kHz.
- What is the bandwidth of the AD8691AUJZ-R2?
The bandwidth is 10 MHz.
- What is the supply voltage range for the AD8691AUJZ-R2?
The supply voltage range is from 2.7 V to 6 V.
- What are the typical applications of the AD8691AUJZ-R2?
Typical applications include photodiode amplification, battery-powered instrumentation, medical instruments, and portable audio devices.
- What is the slew rate of the AD8691AUJZ-R2?
The slew rate is 5 V/µs.
- What is the settling time of the AD8691AUJZ-R2?
The settling time to 0.01% is 1 µs.
- What are the package options for the AD8691AUJZ-R2?
The AD8691 is available in 5-lead SC70 and 5-lead TSOT packages.
- What is the temperature range for the AD8691AUJZ-R2?
The device is specified over the extended industrial temperature range of −40°C to +125°C.
