Overview
The AD8655ARMZ, produced by Analog Devices Inc., is a low noise, precision CMOS operational amplifier. It is part of the AD8655/AD8656 series, which are recognized as the industry’s lowest noise, precision CMOS amplifiers. These amplifiers leverage Analog Devices’ DigiTrim® technology to achieve high DC accuracy, making them ideal for low voltage applications requiring high precision and low noise performance.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply Voltage | 2.7 | 5.5 | V | ||
| Input Offset Voltage (VOS) | 250 | µV | |||
| Input Voltage Noise Density | f = 10 kHz | 2.7 | nV/√Hz | ||
| Total Harmonic Distortion + Noise (THD + N) | G = 1, RL = 1 kΩ, f = 1 kHz, VIN = 2 V p-p | 0.0007 | % | ||
| Gain Bandwidth Product (GBP) | 27 | 28 | MHz | ||
| Slew Rate (SR) | RL = 10 kΩ | 8.5 | 11 | V/µs | |
| Settling Time (ts) | To 0.1%, VIN = 0 V to 2 V step, G = +1 | 370 | ns | ||
| Output Current (IOUT) | VOUT = ±0.5 V | ±220 | mA | ||
| Common Mode Rejection Ratio (CMRR) | 100 | dB | |||
| Operating Temperature Range | -40 | 125 | °C |
Key Features
- Rail-to-Rail Input and Output: Enables the amplifier to swing rail-to-rail, making it suitable for buffering analog-to-digital converters (ADCs) and other wide dynamic range devices in single-supply systems.
- Low Noise Performance: Features a low input voltage noise density of 2.7 nV/√Hz at 10 kHz, making it ideal for applications requiring low noise.
- High Precision: Utilizes Analog Devices’ DigiTrim® technology to achieve high DC accuracy with a low offset voltage of 250 µV max.
- High Output Current Capability: Can deliver up to ±220 mA of output current, suitable for driving heavy loads.
- Wide Operating Temperature Range: Fully specified over the -40°C to +125°C temperature range, making it suitable for various environmental conditions.
- Unity Gain Stable: Stable in unity gain configurations, which is beneficial for many application scenarios.
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 capabilities.
- 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 precision filters due to its high precision and rail-to-rail input and output.
- Automotive Applications: Qualified for automotive applications, including collision avoidance systems and other automotive electronics.
- PLL Filters: Used in phase-locked loop (PLL) filters due to its high precision and stability.
Q & A
- What is the input voltage noise density of the AD8655ARMZ at 10 kHz?
The input voltage noise density of the AD8655ARMZ at 10 kHz is 2.7 nV/√Hz.
- What is the maximum input offset voltage of the AD8655ARMZ?
The maximum input offset voltage of the AD8655ARMZ is 250 µV.
- What is the gain bandwidth product (GBP) of the AD8655ARMZ?
The gain bandwidth product (GBP) of the AD8655ARMZ is 27 MHz to 28 MHz.
- What is the slew rate of the AD8655ARMZ?
The slew rate of the AD8655ARMZ is 8.5 V/µs to 11 V/µs with RL = 10 kΩ.
- What is the output current capability of the AD8655ARMZ?
The AD8655ARMZ can deliver up to ±220 mA of output current.
- What is the common mode rejection ratio (CMRR) of the AD8655ARMZ?
The common mode rejection ratio (CMRR) of the AD8655ARMZ is 100 dB.
- What is the operating temperature range of the AD8655ARMZ?
The operating temperature range of the AD8655ARMZ is -40°C to +125°C.
- Is the AD8655ARMZ suitable for automotive applications?
Yes, the AD8655ARMZ is qualified for automotive applications.
- What package types are available for the AD8655ARMZ?
The AD8655ARMZ is available in 8-lead MSOP and SOIC packages.
- What are some typical applications of the AD8655ARMZ?
Typical applications include ADC and DAC buffers, audio applications, industrial controls, precision filters, and automotive electronics.
