Overview
The AD8659ARZ from Analog Devices Inc. is a quad micropower, precision, rail-to-rail input/output operational amplifier. It is designed for low power consumption and a wide operating supply voltage range, making it suitable for various applications requiring high precision and low power. The AD8659 operates from 2.7 V to 18 V in single-supply mode and from ±1.35 V to ±9 V in dual-supply mode, with a typical quiescent supply current of 18 μA per amplifier. This device is optimized for applications where low offset voltage, low input bias current, and high immunity to electromagnetic interference are crucial.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Range | 2.7 V to 18 V (single-supply), ±1.35 V to ±9 V (dual-supply) | V |
| Quiescent Supply Current | 18 μA (typical per amplifier) | μA |
| Offset Voltage | 350 μV (maximum) | μV |
| Input Bias Current | 20 pA (maximum) | pA |
| Gain Bandwidth Product | 230 kHz (typical at AV = 100) | kHz |
| Unity-Gain Crossover Frequency | 230 kHz | kHz |
| -3 dB Closed-Loop Bandwidth | 305 kHz | kHz |
| Channel Separation | 95 dB | dB |
| EMI Rejection Ratio | 90 dB | dB |
| Output Type | Rail-to-Rail | |
| Number of Channels | 4 | |
| Package Type | 14-SOIC, 16-LFCSP |
Key Features
- Micropower operation with high voltage capability (18 V maximum)
- Low offset voltage: 350 μV maximum
- Low input bias current: 20 pA maximum
- High gain bandwidth product: 230 kHz at AV = 100 typical
- Unity-gain stable with -3 dB closed-loop bandwidth of 305 kHz
- Excellent electromagnetic interference immunity
- Rail-to-rail input and output
- Single-supply and dual-supply operation
- Precision specifications achieved through Analog Devices’ patented DigiTrim® trimming technique
Applications
- Portable operating systems
- Current monitors and 4 mA to 20 mA loop drivers
- Buffer/level shifting
- Multipole filters
- Remote/wireless sensors
- Low power transimpedance amplifiers
- Current monitoring in process and motor control applications
- DC gain and buffering of sensor front ends or high impedance input sources
Q & A
- What is the supply voltage range for the AD8659? The AD8659 operates from 2.7 V to 18 V in single-supply mode and from ±1.35 V to ±9 V in dual-supply mode.
- What is the typical quiescent supply current per amplifier? The typical quiescent supply current is 18 μA per amplifier.
- What is the maximum offset voltage of the AD8659? The maximum offset voltage is 350 μV.
- What is the input bias current of the AD8659? The input bias current is 20 pA maximum.
- What is the gain bandwidth product of the AD8659? The gain bandwidth product is 230 kHz at AV = 100 typical.
- Is the AD8659 unity-gain stable? Yes, the AD8659 is unity-gain stable.
- What is the -3 dB closed-loop bandwidth of the AD8659? The -3 dB closed-loop bandwidth is 305 kHz.
- Does the AD8659 have high immunity to electromagnetic interference? Yes, the AD8659 has excellent electromagnetic interference immunity.
- What types of packages are available for the AD8659? The AD8659 is available in 14-SOIC and 16-LFCSP packages.
- What are some common applications of the AD8659? Common applications include portable operating systems, current monitors, buffer/level shifting, multipole filters, remote/wireless sensors, and low power transimpedance amplifiers.
