Overview
The AD8628AUJZ-R2 is a high-precision, single-supply, rail-to-rail input and output operational amplifier produced by Analog Devices Inc. This device is part of the AD8628/AD8629/AD8630 family, known for its ultralow offset voltage, low drift, and low noise characteristics. It is designed to operate with a single supply voltage ranging from 2.7 V to 5 V, making it versatile for various linear circuits and systems. The AD8628AUJZ-R2 is particularly suited for applications requiring high accuracy and low noise, such as in medical equipment, position and pressure sensors, and strain gage amplifiers.
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 | 300 | pA |
| Input Offset Current | IOS | −40°C ≤ TA ≤ +125°C | 50 | 200 | 250 | pA |
| Common-Mode Rejection Ratio | CMRR | VCM = 0 V to 5 V, −40°C ≤ TA ≤ +125°C | 115 | 130 | dB | |
| Large Signal Voltage Gain | AVO | RL = 10 kΩ, VO = 0.3 V to 4.7 V, −40°C ≤ TA ≤ +125°C | 120 | 135 | dB | |
| Offset Voltage Drift | ∆VOS/∆T | −40°C ≤ TA ≤ +125°C | 0.002 | 0.02 | µV/°C | |
| Supply Current per Amplifier | ISY | VO = VS/2, −40°C ≤ TA ≤ +125°C | 0.85 | 1.1 | mA | |
| Operating Temperature Range | TA | −40 | 125 | °C |
Key Features
- Low Offset Voltage: Typically 1 µV, ensuring high accuracy in applications.
- Low Drift: Offset voltage drift of less than 0.005 µV/°C, maintaining precision over a wide temperature range.
- Low Noise: Voltage noise of 0.5 µV p-p (0.1 Hz to 10 Hz), suitable for sensitive measurement applications.
- Rail-to-Rail Input and Output Swing: Allows for full utilization of the supply voltage range, reducing input biasing complexity and maximizing signal-to-noise ratio (SNR).
- High Gain, CMRR, and PSRR: High common-mode rejection ratio (CMRR) and power supply rejection ratio (PSRR) of up to 130 dB, ensuring robust performance in noisy environments.
- Low Input Bias Current: Maximum input bias current of 100 pA, minimizing errors in high-impedance circuits.
- Low Supply Current: Typical supply current of 1.0 mA per amplifier, making it power-efficient.
- No External Capacitor Required: Simplifies circuit design and reduces component count.
Applications
- Medical Equipment: Ideal for medical devices requiring high precision and low noise.
- Position and Pressure Sensors: Suitable for applications where precise measurement is critical.
- Strain Gage Amplifiers: Enhances the accuracy of strain gage measurements in various industrial and scientific applications.
- High-Precision Instrumentation: Used in instrumentation amplifiers, data acquisition systems, and other high-precision measurement circuits.
Q & A
- What is the typical offset voltage of the AD8628AUJZ-R2?
The typical offset voltage is 1 µV.
- What is the operating temperature range of the AD8628AUJZ-R2?
The operating temperature range is from −40°C to +125°C.
- What is the common-mode rejection ratio (CMRR) of the AD8628AUJZ-R2?
The CMRR is up to 130 dB.
- Does the AD8628AUJZ-R2 require an external capacitor for operation?
No, it does not require an external capacitor.
- What is the maximum input bias current of the AD8628AUJZ-R2?
The maximum input bias current is 100 pA.
- What is the typical supply current per amplifier for the AD8628AUJZ-R2?
The typical supply current per amplifier is 1.0 mA.
- What are some common applications of the AD8628AUJZ-R2?
Common applications include medical equipment, position and pressure sensors, strain gage amplifiers, and high-precision instrumentation.
- What is the voltage noise of the AD8628AUJZ-R2?
The voltage noise is 0.5 µV p-p (0.1 Hz to 10 Hz).
- What is the slew rate of the AD8628AUJZ-R2?
The slew rate is 1.0 V/µs.
- What is the gain bandwidth product (GBP) of the AD8628AUJZ-R2?
The gain bandwidth product is 2.5 MHz.
