Overview
The AD8642ARMZ, produced by Analog Devices Inc., is a low-power, precision JFET input operational amplifier. This device is part of the AD8641/AD8642/AD8643 family, known for its extremely low input bias current and rail-to-rail output. It is designed to operate in both single-supply and dual-supply configurations, making it versatile for various applications. The AD8642ARMZ is particularly suitable for systems requiring low power consumption and high precision, such as line-/battery-powered instruments, photodiode amplifiers, and medical instrumentation.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Supply Current per Amplifier | 200 µA (typ), 250 µA (max) | −40°C to +125°C |
| Input Bias Current | 0.25 pA (typ), 1 pA (max) | −40°C to +125°C |
| Input Offset Voltage | 70 µV (typ), 750 µV (max) | −40°C to +125°C |
| Output Voltage High | 4.95 V (typ), 4.94 V (min) | IL = 1 mA, −40°C to +125°C |
| Output Voltage Low | 0.05 V (typ), 0.01 V (min) | IL = 1 mA, −40°C to +125°C |
| Output Current | ±6 mA | |
| Slew Rate | 3 V/µs | |
| Gain Bandwidth Product | 3.5 MHz | |
| Operating Temperature Range | −40°C to +125°C | |
| Package Type | 8-MSOP |
Key Features
- Low supply current: 200 µA (typ) per amplifier
- Very low input bias current: 0.25 pA (typ)
- Low offset voltage: 70 µV (typ)
- Single-supply operation: 5 V to 26 V
- Dual-supply operation: ±2.5 V to ±13 V
- Rail-to-rail output
- Unity-gain stable
- No phase reversal
- Stable with capacitive loads of more than 500 pF
Applications
- Line-/battery-powered instruments
- Photodiode amplifiers
- Precision current sensing
- Medical instrumentation
- Industrial controls
- Precision filters
- Portable audio
- ATE reference level drivers
- Battery management
Q & A
- What is the typical supply current of the AD8642ARMZ?
The typical supply current is 200 µA per amplifier.
- What is the input bias current of the AD8642ARMZ?
The input bias current is 0.25 pA (typ) and 1 pA (max).
- What is the operating temperature range of the AD8642ARMZ?
The operating temperature range is −40°C to +125°C.
- What is the gain bandwidth product of the AD8642ARMZ?
The gain bandwidth product is 3.5 MHz.
- Is the AD8642ARMZ stable with capacitive loads?
- What are the typical output voltage high and low values for the AD8642ARMZ?
The typical output voltage high is 4.95 V and the typical output voltage low is 0.05 V.
- What is the slew rate of the AD8642ARMZ?
The slew rate is 3 V/µs.
- What are some common applications of the AD8642ARMZ?
- What package type is the AD8642ARMZ available in?
The AD8642ARMZ is available in an 8-MSOP package.
- Does the AD8642ARMZ support single-supply and dual-supply operations?
