Overview
The AD8655ARMZ-R2, produced by Analog Devices Inc., is a precision CMOS operational amplifier known for its low noise and high precision performance. This amplifier leverages Analog Devices' DigiTrim® technology to achieve high dc accuracy, making it suitable for a wide range of applications requiring low voltage and high dynamic range. The AD8655 is part of the AD8655/AD8656 family, which is recognized for its industry-leading low noise characteristics and rail-to-rail input and output capabilities.
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 Offset Current | IOS | −40°C ≤ TA ≤ +125°C | 10 | 500 | pA | |
| Input Voltage Range | 0 | 5 | V | |||
| Common-Mode Rejection Ratio | CMRR | VCM = 0 V to 5 V | 85 | 100 | dB | |
| Output Voltage High | VOH | IL = 1 mA; −40°C ≤ TA ≤ +125°C | 4.97 | 4.991 | V | |
| Output Voltage Low | VOL | IL = 1 mA; −40°C ≤ TA ≤ +125°C | 8 | 30 | mV | |
| Output Current | IOUT | VOUT = ±0.5 V | ±220 | mA | ||
| Power Supply Rejection Ratio | PSRR | VS = 2.7 V to 5.0 V | 88 | 105 | dB | |
| Supply Current/Amplifier | ISY | VO = 0 V | 3.7 | 4.5 | 5.3 | mA |
| Input Voltage Noise Density | f = 10 kHz | 2.7 | nV/√Hz | |||
| 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 |
Key Features
- Low Noise: 2.7 nV/√Hz at 10 kHz, making it ideal for applications requiring high signal integrity.
- High Precision: Low offset voltage (250 µV max) and low offset voltage drift (0.4 µV/°C typ, 2.3 µV/°C max).
- Rail-to-Rail Input/Output: Enables the amplifier to operate effectively in single-supply systems and buffer wide dynamic range devices.
- High Output Current: Capable of delivering up to ±220 mA, suitable for driving heavy loads.
- Wide Operating Range: Operates from 2.7 V to 5.5 V and over a temperature range of −40°C to +125°C.
- Unity Gain Stable: Ensures stability in unity gain configurations.
- High Bandwidth: Gain bandwidth product of 28 MHz and a slew rate of up to 11 V/µs.
Applications
- ADC and DAC Buffers: Ideal for buffering analog-to-digital converters and digital-to-analog converters due to its rail-to-rail input/output capabilities.
- Audio Applications: Suitable for microphone pre-amps and audio mixing consoles due to its low noise and high output current.
- Industrial Controls: Used in precision filters and other industrial control systems requiring high accuracy and low noise.
- Digital Scales: Enhances the precision and dynamic range in digital scale applications.
- Automotive Applications: Qualified for automotive use, including collision avoidance systems and other precision automotive applications.
- PLL Filters: Used in phase-locked loop filters due to its high precision and low noise characteristics.
Q & A
- What is the typical input voltage noise density of the AD8655 at 10 kHz?
The typical input voltage noise density of the AD8655 at 10 kHz is 2.7 nV/√Hz. - What is the maximum offset voltage of the AD8655?
The maximum offset voltage of the AD8655 is 250 µV. - What is the operating voltage range of the AD8655?
The AD8655 operates from 2.7 V to 5.5 V. - What is the maximum output current of the AD8655?
The maximum output current of the AD8655 is ±220 mA. - Is the AD8655 suitable for automotive applications?
Yes, the AD8655 is qualified for automotive applications. - What is the gain bandwidth product of the AD8655?
The gain bandwidth product of the AD8655 is 28 MHz. - What is the slew rate of the AD8655?
The slew rate of the AD8655 is up to 11 V/µs. - What is the settling time of the AD8655 to 0.1%?
The settling time of the AD8655 to 0.1% is 370 ns. - Does the AD8655 support rail-to-rail input and output?
Yes, the AD8655 supports rail-to-rail input and output. - What is the common-mode rejection ratio of the AD8655?
The common-mode rejection ratio of the AD8655 is 100 dB.
