Overview
The AD8628ARTZ-R2, produced by Analog Devices Inc., is a high-precision, single-supply, rail-to-rail input and output operational amplifier. This device is part of the AD8628/AD8629/AD8630 series, known for their ultra-low offset voltage, drift, and bias current. These amplifiers combine the benefits of auto-zeroing and chopping technologies to offer low noise and high accuracy, making them suitable for a wide range of sensitive measurement applications.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Offset Voltage | VOS | — | 1 | 5 | 10 | µV |
| Input Bias Current | IB | — | 30 | 100 | 1.5 nA | pA |
| Input Offset Drift | ∆VOS/∆T | — | 0.002 | 0.02 | µV/°C | |
| Common-Mode Rejection Ratio | CMRR | VCM = 0 V to 2.7 V | 115 | 130 | dB | |
| Power Supply Rejection Ratio | PSRR | VS = 2.7 V to 5.5 V | 115 | 130 | dB | |
| Supply Current per Amplifier | ISY | VO = VS/2 | 0.75 | 1.0 | mA | |
| Slew Rate | SR | RL = 10 kΩ | — | 1.0 | V/µs | |
| Gain Bandwidth Product | GBP | — | — | 2.5 | MHz | |
| Voltage Noise (0.1 Hz to 10 Hz) | en p-p | — | — | 0.5 | µV p-p |
Key Features
- Lowest auto-zero amplifier noise with an offset voltage of only 1 µV and drift of less than 0.005 µV/°C.
- Rail-to-rail input and output swing, allowing for maximum signal-to-noise ratio (SNR) and reduced input biasing complexity.
- High gain, common-mode rejection ratio (CMRR), and power supply rejection ratio (PSRR) of 130 dB.
- Very low input bias current of 100 pA maximum and low supply current of 1.0 mA.
- No external capacitor required, and significantly reduced digital switching noise compared to traditional chopper-stabilized amplifiers.
- Fast overload recovery time of less than 10 µs, enhancing performance in transient-loaded applications.
Applications
- Automotive sensors and systems.
- Pressure and position sensors.
- Strain gage amplifiers.
- Medical instrumentation, including thermocouple amplifiers and precision current sensing.
- Photodiode amplifiers).
Q & A
- What is the typical offset voltage of the AD8628ARTZ-R2?
The typical offset voltage is 1 µV).
- What is the input offset drift of the AD8628ARTZ-R2?
The input offset drift is less than 0.005 µV/°C).
- Does the AD8628ARTZ-R2 require an external capacitor?
No, the AD8628ARTZ-R2 does not require an external capacitor).
- What is the common-mode rejection ratio (CMRR) of the AD8628ARTZ-R2?
The CMRR is 130 dB).
- What is the slew rate of the AD8628ARTZ-R2?
The slew rate is 1.0 V/µs).
- What are the typical supply current and voltage range for the AD8628ARTZ-R2?
The typical supply current is 1.0 mA, and the device operates from a single supply of 2.7 V to 5 V).
- How does the AD8628ARTZ-R2 handle overload recovery?
The AD8628ARTZ-R2 has a fast overload recovery time of less than 10 µs).
- What are some common applications of the AD8628ARTZ-R2?
Common applications include automotive sensors, pressure and position sensors, strain gage amplifiers, medical instrumentation, and photodiode amplifiers).
- Is the AD8628ARTZ-R2 suitable for harsh operating environments?
Yes, the AD8628ARTZ-R2 is suitable for harsh operating environments with an operating temperature range of -40°C to +125°C).
- What is the gain bandwidth product (GBP) of the AD8628ARTZ-R2?
The gain bandwidth product is 2.5 MHz).
