Overview
The AD8656WARMZ-REEL, produced by Analog Devices Inc., is a low noise, precision CMOS operational amplifier. This component is part of the AD8655/AD8656 family, known for its high dc accuracy and low noise performance. It is designed to operate in low voltage applications, offering rail-to-rail input and output capabilities, which make it ideal for buffering analog-to-digital converters (ADCs) and other wide dynamic range devices in single-supply systems. The AD8656 is fully specified over a temperature range of −40°C to +125°C and is qualified for automotive applications.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Offset Voltage | VOS | VCM = 0 V to 5 V | 50 | 250 | 550 | µV |
| Offset Voltage Drift | ΔVOS/ΔT | −40°C ≤ TA ≤ +125°C | 0.4 | 2.3 | µV/°C | |
| Input Bias Current | IB | −40°C ≤ TA ≤ +125°C | 1 | 10 | 500 | pA |
| Input Voltage Range | 0 | 5 | V | |||
| Common-Mode Rejection Ratio | CMRR | VCM = 0 V to 5 V | 85 | 100 | dB | |
| Gain Bandwidth Product | GBP | 28 | MHz | |||
| Slew Rate | SR | RL = 10 kΩ | 11 | V/µs | ||
| Settling Time | ts | VIN = 0 V to 2 V step, G = +1 | 370 | ns | ||
| Phase Margin | CL = 0 pF | 69 | degrees | |||
| Supply Voltage | VS | 2.7 | 5.5 | V |
Key Features
- Low noise: 2.7 nV/√Hz at 10 kHz
- Low offset voltage: 250 µV max over VCM
- Low THD + N: 0.0007% at G = 1, RL = 1 kΩ, f = 1 kHz, VIN = 2 V p-p
- Rail-to-rail input and output
- Unity gain stable
- High precision performance using Analog Devices DigiTrim® technology
- High output current capability
- Qualified for automotive applications (AEC-Q100)
- Available in Pb-free, 8-lead MSOP and SOIC packages
Applications
- ADC and DAC buffers
- Audio applications (microphone pre-amps, audio mixing consoles)
- Industrial controls
- Precision filters
- Digital scales
- Automotive collision avoidance systems
- PLL filters
Q & A
- What is the typical offset voltage of the AD8656?
The typical offset voltage of the AD8656 is 250 µV over VCM. - What is the noise performance of the AD8656?
The AD8656 has a low noise performance of 2.7 nV/√Hz at 10 kHz. - What is the common-mode rejection ratio (CMRR) of the AD8656?
The CMRR of the AD8656 is 85 dB to 100 dB over VCM = 0 V to 5 V. - What is the gain bandwidth product (GBP) of the AD8656?
The GBP of the AD8656 is 28 MHz. - Is the AD8656 qualified for automotive applications?
Yes, the AD8656 is qualified for automotive applications and meets the AEC-Q100 standards. - What are the available package types for the AD8656?
The AD8656 is available in Pb-free, 8-lead MSOP and SOIC packages. - What is the operating supply voltage range of the AD8656?
The operating supply voltage range of the AD8656 is from 2.7 V to 5.5 V. - What is the typical slew rate of the AD8656?
The typical slew rate of the AD8656 is 11 V/µs with RL = 10 kΩ. - What is the settling time of the AD8656?
The settling time of the AD8656 is 370 ns to 0.1% for a VIN = 0 V to 2 V step at G = +1. - What are some common applications of the AD8656?
The AD8656 is commonly used in ADC and DAC buffers, audio applications, industrial controls, precision filters, digital scales, and automotive collision avoidance systems.
