Overview
The AD8628WARTZ-R7 is a zero-drift, single-supply, rail-to-rail input/output operational amplifier (Op Amp) produced by Analog Devices Inc. This amplifier is part of the AD8628 series, known for its ultralow offset, drift, and bias current. It combines high accuracy and low noise, making it suitable for a variety of sensitive measurement applications in harsh operating environments.
The AD8628WARTZ-R7 operates on a single supply from 2.7 V to 5 V and is fully specified over a temperature range of -40°C to +125°C. It features a patented auto-zeroing and chopping topology that maintains low offset voltage over a wide temperature range and operating lifetime.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Offset Voltage | VOS | -40°C ≤ TA ≤ +125°C | 1 | - | 5 | µV |
| Input Offset Drift | ∆VOS/∆T | -40°C ≤ TA ≤ +125°C | 0.002 | - | 0.02 | µV/°C |
| Input Bias Current | IB | -40°C ≤ TA ≤ +125°C | 30 | 100 | 100 | pA |
| Supply Current | Iq/Amp | - | - | 850 | µA | |
| Slew Rate | SR | RL = 10 kΩ | - | 1 | - | V/µs |
| Gain Bandwidth Product | GBP | - | - | 2.5 | MHz | |
| Voltage Noise Density | en | f = 1 kHz | - | 22 | - | nV/√Hz |
| Common-Mode Rejection Ratio | CMRR | VCM = 0 V to 5 V | 115 | 130 | 140 | dB |
| Operating Temperature Range | - | - | -40 | - | 125 | °C |
Key Features
- Lowest auto-zero amplifier noise with 0.5 µV p-p (0 Hz to 10 Hz)
- Low offset voltage: 1 µV and low input offset drift: 0.002 µV/°C
- Rail-to-rail input and output swing
- Single-supply operation from 2.7 V to 5 V
- High gain, CMRR, and PSRR: up to 130 dB
- Very low input bias current: 100 pA maximum
- Low supply current: 1.0 mA
- No external components required
- Qualified for automotive applications
Applications
- Automotive sensors and pressure and position sensors
- Strain gage amplifiers
- Medical instrumentation
- Thermocouple amplifiers
- Precision current sensing
- Photodiode amplifiers
Q & A
- What is the typical offset voltage of the AD8628WARTZ-R7?
The typical offset voltage is 1 µV
- What is the input offset drift of the AD8628WARTZ-R7?
The input offset drift is 0.002 µV/°C
- What is the operating temperature range of the AD8628WARTZ-R7?
The operating temperature range is -40°C to +125°C
- Does the AD8628WARTZ-R7 require any external components?
No, it does not require any external components
- What is the typical supply current of the AD8628WARTZ-R7?
The typical supply current is 1.0 mA
- What is the slew rate of the AD8628WARTZ-R7?
The slew rate is 1 V/µs
- What is the gain bandwidth product of the AD8628WARTZ-R7?
The gain bandwidth product is 2.5 MHz
- What is the common-mode rejection ratio (CMRR) of the AD8628WARTZ-R7?
The CMRR is up to 130 dB
- Is the AD8628WARTZ-R7 qualified for automotive applications?
Yes, it is qualified for automotive applications
- What are some common applications of the AD8628WARTZ-R7?
Common applications include automotive sensors, medical instrumentation, thermocouple amplifiers, and precision current sensing
