Overview
The AD8628ART-R2, produced by Analog Devices Inc., is a wide bandwidth auto-zero operational amplifier. It features rail-to-rail input and output swing, low noise, and high precision. This amplifier is part of the AD8628 family, which combines low cost with high accuracy and low noise, making it suitable for applications where error sources cannot be tolerated. The AD8628 operates fully specified from 2.7 V to 5 V single supply (±1.35 V to ±2.5 V dual supply) and is available in various packages, including the 5-Lead SOT-23 package for the AD8628ART-R2 variant.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Offset Voltage | VOS | −40°C ≤ TA ≤ +125°C | 1 | 5 | 10 | µV |
| Input Bias Current | IB | −40°C ≤ TA ≤ +125°C | 30 | 100 | 1.5 nA | pA |
| Input Offset Current | IOS | −40°C ≤ TA ≤ +125°C | 50 | 200 | 250 | pA |
| Input Voltage Range | 0 | 5 | V | |||
| Common-Mode Rejection Ratio | CMRR | VCM = 0 V to 2.7 V | 115 | 130 | 120 | dB |
| Large Signal Voltage Gain | AVO | RL = 10 kΩ, VO = 0.3 V to 2.4 V | 110 | 140 | 130 | dB |
| Offset Voltage Drift | ∆VOS/∆T | −40°C ≤ TA ≤ +125°C | 0.002 | 0.02 | µV/°C | |
| Output Voltage High | VOH | RL = 100 kΩ to ground | 4.99 | 4.996 | V | |
| Output Voltage Low | VOL | RL = 100 kΩ to V+ | 1 | 5 | mV | |
| Supply Current per Amplifier | ISY | VO = VS/2 | 0.85 | 1.1 | mA | |
| Slew Rate | SR | RL = 10 kΩ | 1.0 | V/µs | ||
| Gain Bandwidth Product | GBP | 2.5 | MHz | |||
| Voltage Noise Density | en | f = 1 kHz | 22 | nV/√Hz |
Key Features
- Lowest auto-zero amplifier noise with 0.5 µV p-p (0.1 Hz to 10 Hz).
- Low offset voltage of 1 µV and low input offset drift of 0.002 µV/°C.
- Rail-to-rail input and output swing, allowing for full use of the supply voltage range.
- High gain, common-mode rejection ratio (CMRR), and power supply rejection ratio (PSRR) of up to 130 dB.
- Very low input bias current of 100 pA maximum and low supply current of 1.0 mA.
- No external components required for operation.
- Low overload recovery time of 50 µs.
- Qualified for automotive and extended industrial temperature range (−40°C to +125°C).
Applications
- Automotive sensors, including pressure and position sensors.
- Strain gage amplifiers.
- Medical instrumentation, such as thermocouple amplifiers.
- Precision current sensing and photodiode amplifiers.
Q & A
- What is the typical offset voltage of the AD8628ART-R2?
The typical offset voltage is 1 µV.
- What is the input offset drift of the AD8628ART-R2?
The input offset drift is less than 0.002 µV/°C.
- What is the supply voltage range for the AD8628ART-R2?
The AD8628ART-R2 operates from 2.7 V to 5 V single supply (±1.35 V to ±2.5 V dual supply).
- What is the common-mode rejection ratio (CMRR) of the AD8628ART-R2?
The CMRR is up to 130 dB.
- Does the AD8628ART-R2 require external components for operation?
No, the AD8628ART-R2 does not require any external components for operation.
- What is the typical slew rate of the AD8628ART-R2?
The typical slew rate is 1.0 V/µs.
- What are the typical applications of the AD8628ART-R2?
The AD8628ART-R2 is used in automotive sensors, strain gage amplifiers, medical instrumentation, precision current sensing, and photodiode amplifiers.
- What is the temperature range for the AD8628ART-R2?
The AD8628ART-R2 is qualified for the extended industrial temperature range (−40°C to +125°C).
- What is the power supply rejection ratio (PSRR) of the AD8628ART-R2?
The PSRR is up to 130 dB.
- What is the input bias current of the AD8628ART-R2?
The input bias current is 100 pA maximum.
