Overview
The AD8642ARMZ-REEL, produced by Analog Devices Inc., is a low power, precision JFET input operational amplifier. It is characterized by its extremely low input bias current and rail-to-rail output, making it suitable for a wide range of applications. This amplifier is designed to operate in single-supply or dual-supply configurations, with a supply voltage range of 5V to 26V for single-supply and ±2.5V to ±13V for dual-supply. The AD8642 is particularly useful in systems requiring low power consumption and high precision, such as line-/battery-powered instruments, photodiode amplifiers, and medical instrumentation.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Amplifier Type | J-FET | |
| Number of Circuits | 2 | |
| Output Type | Rail-to-Rail | |
| Slew Rate | 3 V/µs | |
| Gain Bandwidth Product | 3.5 MHz | |
| Input Bias Current | 0.25 pA (typ) | |
| Input Offset Voltage | 50 µV (typ) | |
| Supply Current/Amplifier | 195 µA (typ) | −40°C to +125°C |
| Output Current/Channel | 12 mA | |
| Supply Voltage, Single/Dual | 5 V to 26 V, ±2.5 V to ±13 V | |
| Operating Temperature | −40°C to +125°C | |
| Package | 8-MSOP (0.118", 3.00mm Width) |
Key Features
- Extremely low input bias current of 0.25 pA (typ)
- Rail-to-rail output, unity-gain stable, no phase reversal
- Low offset voltage of 50 µV (typ)
- Single-supply operation from 5V to 26V and dual-supply operation from ±2.5V to ±13V
- Low power consumption with a supply current of 195 µA (typ) per amplifier
- High common-mode rejection ratio of 93 dB (typ) at VCM = 0V to 2.5V
- Voltage noise of 4 µV p-p (typ) from 0.1 Hz to 10 Hz
Applications
- Line-/battery-powered instruments
- Photodiode amplifiers
- Precision current sensing
- Medical instrumentation
- Industrial controls
- Precision filters
- Portable audio
- ATE (Automatic Test Equipment) reference level drivers
- Battery management
Q & A
- What is the input bias current of the AD8642?
The input bias current of the AD8642 is 0.25 pA (typ). - What is the typical supply current per amplifier for the AD8642?
The typical supply current per amplifier is 195 µA. - What is the gain bandwidth product of the AD8642?
The gain bandwidth product of the AD8642 is 3.5 MHz. - What are the operating temperature ranges for the AD8642?
The operating temperature range is −40°C to +125°C. - What types of supply voltages can the AD8642 operate with?
The AD8642 can operate with single-supply voltages from 5V to 26V and dual-supply voltages from ±2.5V to ±13V. - What is the slew rate of the AD8642?
The slew rate of the AD8642 is 3 V/µs. - What is the typical output current per channel for the AD8642?
The typical output current per channel is 12 mA. - What is the common-mode rejection ratio of the AD8642?
The common-mode rejection ratio is 93 dB (typ) at VCM = 0V to 2.5V. - What are some common applications of the AD8642?
Common applications include line-/battery-powered instruments, photodiode amplifiers, precision current sensing, medical instrumentation, and industrial controls. - What package types are available for the AD8642?
The AD8642 is available in an 8-MSOP package.
