Overview
The AD8656ARMZ, produced by Analog Devices Inc., is a precision CMOS dual operational amplifier known for its exceptionally low noise and high precision performance. This device leverages Analog Devices' DigiTrim® technology to achieve high DC accuracy, making it ideal for a wide range of applications requiring low noise and high dynamic range. The AD8656 is fully specified over a temperature range of −40°C to +125°C and is available in Pb-free, 8-lead MSOP and SOIC packages, making it suitable for automotive and other demanding environments.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Supply Voltage | VS | 2.7 | 5.5 | V | ||
| Offset Voltage | VOS | TA = 25°C | 250 | µV | ||
| Offset Voltage Drift | TA = 25°C | 0.4 | 2.3 | µV/°C | ||
| Noise Voltage Density | en | 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 | 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 |
Key Features
- Low Noise: The AD8656 features a low noise voltage density of 2.7 nV/√Hz at 10 kHz, making it suitable for applications requiring high signal integrity.
- Precision Performance: High DC accuracy is achieved through Analog Devices' DigiTrim® technology, with a maximum offset voltage of 250 µV.
- Rail-to-Rail Input and Output: The ability to swing rail-to-rail at both the input and output enables the buffering of wide dynamic range devices in single-supply systems.
- High Output Current Capability: Supports high output current, beneficial for audio and other high-current applications.
- Wide Temperature Range: Fully specified over the −40°C to +125°C temperature range, making it suitable for automotive and industrial applications.
- Compact Packaging: Available in Pb-free, 8-lead MSOP and SOIC packages.
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 and output capability.
- Audio Applications: Used in microphone pre-amps and audio mixing consoles to reduce system-level noise and maintain audio fidelity.
- Industrial Controls and Precision Filters: Suitable for data acquisition, process controls, and PLL filter applications.
- Automotive Applications: Qualified for automotive use, including collision avoidance systems.
- Digital Scales and Precision Measurement: Enhances the resolution and dynamic range in low-voltage measurement applications.
Q & A
- What is the typical noise voltage density of the AD8656 at 10 kHz?
The typical noise voltage density of the AD8656 at 10 kHz is 2.7 nV/√Hz. - What is the maximum offset voltage of the AD8656?
The maximum offset voltage of the AD8656 is 250 µV. - What is the gain bandwidth product (GBP) of the AD8656?
The gain bandwidth product (GBP) of the AD8656 is 28 MHz. - What are the typical operating supply voltages for the AD8656?
The AD8656 operates from 2.7 V to 5.5 V. - What are the package options available for the AD8656?
The AD8656 is available in Pb-free, 8-lead MSOP and SOIC packages.. - Is the AD8656 suitable for automotive applications?
Yes, the AD8656 is qualified for automotive applications. - What is the slew rate of the AD8656?
The slew rate of the AD8656 is 11 V/µs with a load resistance of 10 kΩ. - What is the settling time of the AD8656 to 0.1%?
The settling time of the AD8656 to 0.1% is 370 ns for a VIN step from 0 V to 2 V. - What is the phase margin of the AD8656?
The phase margin of the AD8656 is 69 degrees with no load capacitance. - What are some common applications of the AD8656?
The AD8656 is commonly used in ADC and DAC buffers, audio applications, industrial controls, precision filters, and automotive systems.
