Overview
The AD8655ARZ-REEL, manufactured 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 utilize Analog Devices’ DigiTrim® technology to achieve high DC accuracy and are designed for low voltage applications. They offer rail-to-rail input and output capabilities, making them suitable for buffering analog-to-digital converters (ADCs) and other wide dynamic range devices in single-supply systems.
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 |
Key Features
- Low Noise: The AD8655ARZ-REEL features an input voltage noise density of 2.7 nV/√Hz at 10 kHz, making it ideal for applications requiring low noise performance.
- Precision Performance: Utilizes DigiTrim® technology for high DC accuracy, with a maximum offset voltage of 250 µV and an offset voltage drift of 0.4 µV/°C.
- Rail-to-Rail Input/Output: Enables the amplifier to swing rail-to-rail, which is beneficial for buffering ADCs and other wide dynamic range devices in single-supply systems.
- Wide Operating Range: Operates from 2.7 V to 5.5 V and over a temperature range of −40°C to +125°C.
- High Output Current Capability: Can deliver up to ±220 mA of output current, suitable for driving heavy loads.
- Low Power Consumption: The amplifier has a supply current of 3.7 mA to 5.3 mA per amplifier.
- High Accuracy and Stability: Features a high common-mode rejection ratio (CMRR) of 85 dB to 100 dB and a power supply rejection ratio (PSRR) of 88 dB to 105 dB.
Applications
- ADC and DAC Buffers: Ideal for buffering analog-to-digital converters (ADCs) and digital-to-analog converters (DACs) 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, low distortion, and high output current capability.
- Industrial Controls: Used in precision filters and industrial control systems where high accuracy and low noise are required.
- Precision Filters: Utilized in precision filter applications where high precision and low noise are critical.
- Digital Scales: Employed in digital scales for their high precision and stability.
- Automotive Applications: Qualified for automotive applications, including collision avoidance systems and other precision automotive electronics.
- PLL Filters: Used in phase-locked loop (PLL) filters due to their high precision and stability.
Q & A
- What is the input voltage noise density of the AD8655ARZ-REEL at 10 kHz?
The input voltage noise density is 2.7 nV/√Hz at 10 kHz. - What is the maximum offset voltage of the AD8655ARZ-REEL?
The maximum offset voltage is 250 µV. - What is the operating voltage range of the AD8655ARZ-REEL?
The operating voltage range is from 2.7 V to 5.5 V. - What is the temperature range for the AD8655ARZ-REEL?
The temperature range is from −40°C to +125°C. - What is the maximum output current of the AD8655ARZ-REEL?
The maximum output current is ±220 mA. - What technology does the AD8655ARZ-REEL use for high DC accuracy?
The AD8655ARZ-REEL uses Analog Devices’ DigiTrim® technology. - What are some common applications of the AD8655ARZ-REEL?
Common applications include ADC and DAC buffers, audio applications, industrial controls, precision filters, digital scales, and automotive electronics. - What is the gain bandwidth product (GBP) of the AD8655ARZ-REEL?
The gain bandwidth product (GBP) is 28 MHz. - What is the slew rate of the AD8655ARZ-REEL?
The slew rate is 11 V/µs with a load resistance of 10 kΩ. - Is the AD8655ARZ-REEL qualified for automotive applications?
Yes, the AD8655ARZ-REEL is qualified for automotive applications.
