Overview
The AD8656ARZ, produced by Analog Devices Inc., is a precision, low-noise CMOS operational amplifier. It is part of the AD8655/AD8656 family, known for their high dc accuracy and low noise performance. These amplifiers are designed to operate in single-supply systems and are particularly useful in applications requiring rail-to-rail input and output swings. The AD8656ARZ leverages Analog Devices' DigiTrim® technology to achieve high precision and low offset voltage, making it suitable for a variety of applications including audio, industrial controls, and precision filters.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Supply Voltage | VS | 2.7 | 5.5 | V | ||
| Input Voltage | VIN | VSS - 0.3 V to VDD + 0.3 V | V | |||
| Differential Input Voltage | ±6 V | V | ||||
| Offset Voltage | VOS | VCM = VS/2, TA = 25°C | 250 µV | µV | ||
| Offset Voltage Drift | 0.4 µV/°C | 2.3 µV/°C | µV/°C | |||
| Noise Voltage Density | en | f = 10 kHz | 2.7 nV/√Hz | nV/√Hz | ||
| Gain Bandwidth Product | GBP | 28 MHz | MHz | |||
| Slew Rate | SR | RL = 10 kΩ | 11 V/µs | V/µs | ||
| Settling Time | ts | VIN = 0 V to 2 V step, G = +1 | 370 ns | ns | ||
| Phase Margin | CL = 0 pF | 69 degrees | degrees | |||
| Operating Temperature Range | -40°C | +125°C | °C |
Key Features
- Low Noise: 2.7 nV/√Hz at 10 kHz, making it suitable for high precision and low noise applications.
- Rail-to-Rail Input and Output: Enables the amplifier to swing rail-to-rail, which is beneficial for buffering analog-to-digital converters (ADCs) and other wide dynamic range devices in single-supply systems.
- High Precision Performance: Achieved through Analog Devices' DigiTrim® technology, ensuring low offset voltage and high dc accuracy.
- Low Total Harmonic Distortion + Noise (THD + N): 0.0007% at G = 1, RL = 1 kΩ, f = 1 kHz, VIN = 2 V p-p.
- High Output Current Capability: Beneficial for audio applications to maintain audio fidelity and reduce system-level noise performance.
- Automotive Qualified: Fully specified for operation from -40°C to +125°C, making it suitable for automotive applications.
Applications
- ADC and DAC Buffers: Ideal for buffering analog-to-digital converters and digital-to-analog converters due to its rail-to-rail input and output capability.
- Audio Applications: Suitable for microphone pre-amps and audio mixing consoles due to its low noise, low distortion, and high output current capability.
- Industrial Controls and Precision Filters: Used in data acquisition, process controls, and PLL filter applications due to its high precision and rail-to-rail input and output.
- Automotive Collision Avoidance Systems: Qualified for automotive applications, including collision avoidance systems.
Q & A
- What is the typical noise voltage density of the AD8656ARZ at 10 kHz?
The typical noise voltage density of the AD8656ARZ at 10 kHz is 2.7 nV/√Hz. - What is the maximum offset voltage of the AD8656ARZ?
The maximum offset voltage of the AD8656ARZ is 250 µV over VCM. - What is the gain bandwidth product (GBP) of the AD8656ARZ?
The gain bandwidth product (GBP) of the AD8656ARZ is 28 MHz. - What is the slew rate of the AD8656ARZ?
The slew rate of the AD8656ARZ is 11 V/µs with RL = 10 kΩ. - What is the operating temperature range of the AD8656ARZ?
The operating temperature range of the AD8656ARZ is from -40°C to +125°C. - Is the AD8656ARZ suitable for automotive applications?
Yes, the AD8656ARZ is fully specified and qualified for automotive applications. - What are the typical applications of the AD8656ARZ?
The AD8656ARZ is typically used in ADC and DAC buffers, audio applications, industrial controls, precision filters, and automotive collision avoidance systems. - What is the phase margin of the AD8656ARZ?
The phase margin of the AD8656ARZ is 69 degrees with CL = 0 pF. - What is the settling time of the AD8656ARZ to 0.1%?
The settling time of the AD8656ARZ to 0.1% is 370 ns for a VIN = 0 V to 2 V step with G = +1. - What package types are available for the AD8656ARZ?
The AD8656ARZ is available in Pb-free, 8-lead MSOP and SOIC packages.
