Overview
The AD8609ARZ-REEL7, produced by Analog Devices Inc., is a quad micro-power rail-to-rail input and output operational amplifier. This component is part of the AD8603/AD8607/AD8609 family, known for its low offset voltage, low noise, and very low input bias currents. It is designed for single-supply operation from 1.8 V to 5 V and is fully specified to operate over a temperature range of -40°C to +125°C. The AD8609 is particularly useful in portable and loop-powered instrumentation due to its low power consumption and precision characteristics.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Offset Voltage | VOS | VS = 3.3 V @ VCM = 0.5 V and 2.8 V | 12 | 50 | 300 | μV |
| Input Bias Current | IB | -40°C < TA < +85°C | 0.2 | 1 | 50 | pA |
| Input Offset Current | IOS | -40°C < TA < +85°C | 0.1 | 0.5 | 50 | pA |
| Input Voltage Range | IVR | -0.3 to +5.2 V | -0.3 | +5.2 | V | |
| Common-Mode Rejection Ratio | CMRR | 0 V < VCM < 5 V | 80 | 98 | 100 | dB |
| Large Signal Voltage Gain | AVO | RL = 10 kΩ, 0.5 V < VO < 4.5 V | 100 | 2000 | V/mV | |
| Output Voltage High | VOH | IL = 1 mA | 4.95 | 4.97 | V | |
| Output Voltage Low | VOL | IL = 1 mA | 16 | 30 | mV | |
| Short-Circuit Current | ISC | ±70 | mA | |||
| Supply Current per Amplifier | ISY | VO = 0 V | 40 | 50 | 60 | μA |
| Slew Rate | SR | RL = 10 kΩ | 0.1 | V/μs | ||
| Gain Bandwidth Product | GBP | RL = 100 kΩ | 385 | kHz | ||
| Phase Margin | ØO | RL = 10 kΩ, RL = 100 kΩ | 70 | Degrees | ||
| Voltage Noise Density | en | f = 1 kHz | 25 | nV/√Hz |
Key Features
- Low offset voltage: 50 μV maximum
- Low input bias current: 1 pA maximum
- Single-supply operation: 1.8 V to 5 V
- Low noise: 22 nV/√Hz at 10 kHz
- Micropower: 50 μA maximum supply current per amplifier
- No phase reversal
- Unity gain stable
- Rail-to-rail input and output
- High common-mode rejection ratio (CMRR): up to 100 dB
Applications
- Battery-powered instrumentation
- Multipole filters
- Sensors
- Low power ASIC input or output amplifiers
- Buffering CMOS ADCs, DACs, ASICs, and other wide output swing devices in low power, single-supply systems
Q & A
- What is the typical offset voltage of the AD8609? The typical offset voltage is 50 μV.
- What is the input bias current range of the AD8609? The input bias current ranges from 0.2 pA to 50 pA over the temperature range of -40°C to +85°C.
- What is the supply voltage range for the AD8609? The AD8609 operates from a single supply of 1.8 V to 5 V.
- What is the common-mode rejection ratio (CMRR) of the AD8609? The CMRR is up to 100 dB.
- What is the slew rate of the AD8609? The slew rate is 0.1 V/μs.
- What are the typical applications of the AD8609? Typical applications include battery-powered instrumentation, multipole filters, sensors, and low power ASIC input or output amplifiers.
- Is the AD8609 unity gain stable? Yes, the AD8609 is unity gain stable.
- What is the maximum short-circuit current of the AD8609? The maximum short-circuit current is ±70 mA.
- What is the gain bandwidth product (GBP) of the AD8609? The GBP is 385 kHz for a load resistance of 100 kΩ).
- What is the phase margin of the AD8609? The phase margin is 70 degrees).
