Overview
The AD8661ARZ is a high-performance, rail-to-rail output, single-supply operational amplifier produced by Analog Devices Inc. This amplifier utilizes Analog Devices' patented DigiTrim® trimming technique to achieve low offset voltage. It is designed for a wide range of applications requiring high precision and low noise.
The AD8661ARZ operates over a supply voltage range of 5 V to 16 V, making it versatile for various system requirements. It is particularly useful in applications that demand low input bias current, low noise, and wide bandwidth, such as those involving high impedance sensors, audio systems, and medical monitoring equipment.
Key Specifications
| Parameter | Symbol | Test Conditions/Comments | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Offset Voltage | VOS | VCM = VS/2, TA = 25°C | 50 | 160 | 1000 | µV |
| Input Bias Current | IB | −40°C < TA < +85°C | 0.3 | 1 | 50 | pA |
| Input Offset Current | IOS | −40°C < TA < +85°C | 0.2 | 0.5 | 20 | pA |
| Input Voltage Range | −0.1 | +14.0 | V | |||
| Common-Mode Rejection Ratio | CMRR | VCM = −0.1 V to +14.0 V | 90 | 110 | dB | |
| Large Signal Voltage Gain | AVO | RL = 2 kΩ, VO = 0.5 V to 15.5 V | 200 | 360 | V/mV | |
| Output Voltage High | VOH | IL = 1 mA | 15.93 | 15.97 | V | |
| Output Voltage Low | VOL | IL = 1 mA | 24 | 50 | mV | |
| Short-Circuit Current | ISC | ±140 | mA | |||
| Power Supply Rejection Ratio | PSRR | VS = 5 V to 16 V | 95 | 110 | dB | |
| Supply Current per Amplifier | ISY | VO = VS/2 | 1.25 | 1.55 | 2.1 | mA |
Key Features
- Low Offset Voltage: Maximum of 100 µV at VS = 5 V, achieved through Analog Devices' patented DigiTrim® trimming technique.
- Low Input Bias Current: Maximum of 1 pA, making it suitable for high impedance sensors.
- Single-Supply Operation: Operates over a supply voltage range of 5 V to 16 V.
- Low Noise: 10 nV/√Hz, ideal for applications requiring low noise levels.
- Wide Bandwidth: 4 MHz, ensuring high signal fidelity.
- Unity-Gain Stable: Stable in unity-gain configurations.
- Small Package Options: Available in narrow 8-lead SOIC packages.
- High Input Impedance: Suitable for applications requiring high input impedance.
- Low Voltage and Current Noise: Low noise characteristics make it suitable for audio and medical applications.
Applications
- High Impedance Sensors: Ideal for systems using high impedance sensors such as photodiodes due to its low input bias current and low noise.
- Analog-to-Digital Converters (ADCs) and Digital-to-Analog Converters (DACs): Meets the demands of high-performance ADCs and DACs with its wide operating voltage range.
- Audio Applications: Suitable for audio systems due to its high input impedance, low voltage, and low current noise.
- Medical Monitoring Equipment: Used in medical monitoring equipment due to its high input impedance, low noise, and wide bandwidth.
Q & A
- What is the supply voltage range of the AD8661ARZ?
The AD8661ARZ operates over a supply voltage range of 5 V to 16 V.
- What is the maximum offset voltage of the AD8661ARZ at 5 V supply voltage?
The maximum offset voltage is 100 µV at VS = 5 V.
- What is the typical input bias current of the AD8661ARZ?
The typical input bias current is 1 pA.
- What is the bandwidth of the AD8661ARZ?
The bandwidth is 4 MHz.
- Is the AD8661ARZ unity-gain stable?
Yes, the AD8661ARZ is unity-gain stable.
- What package types are available for the AD8661ARZ?
The AD8661ARZ is available in an 8-lead SOIC package.
- What is the operating temperature range of the AD8661ARZ?
The operating temperature range is −40°C to +125°C.
- Is the AD8661ARZ RoHS compliant?
Yes, the AD8661ARZ is RoHS compliant.
- What are some typical applications of the AD8661ARZ?
Typical applications include high impedance sensors, ADCs, DACs, audio systems, and medical monitoring equipment.
- What is the power supply rejection ratio (PSRR) of the AD8661ARZ?
The PSRR is 95 dB to 110 dB over the supply voltage range of 5 V to 16 V.
