Overview
The AD8628WARZ-R7, 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 its ultra-low noise and offset voltage characteristics. It operates over a wide temperature range from -40°C to +125°C and is fully specified for single-supply voltages from 2.7 V to 5 V, as well as dual-supply voltages from ±1.35 V to ±2.5 V. The AD8628WARZ-R7 combines low cost with high accuracy and low noise, making it an ideal choice for sensitive measurement applications in various industries.
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 | pA |
| Common-Mode Rejection Ratio | CMRR | VCM = 0 V to 5 V | 115 | 130 | 140 | dB |
| Large Signal Voltage Gain | AVO | RL = 10 kΩ, VO = 0.3 V to 4.7 V | 120 | 135 | 145 | dB |
| 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 | |
| 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 | ||
| Current Noise Density | in | f = 10 Hz | 5 | fA/√Hz | ||
| Supply Current per Amplifier | ISY | VO = VS/2 | 0.85 | 1.1 | mA |
Key Features
- Low Offset Voltage: Typically 1 µV, ensuring high accuracy in applications.
- Low Noise: 0.5 µV p-p (0.1 Hz to 10 Hz) and 22 nV/√Hz at 1 kHz.
- Rail-to-Rail Input and Output Swing: Allows for maximum signal range and reduces input biasing complexity.
- High CMRR and PSRR: Common-Mode Rejection Ratio (CMRR) and Power Supply Rejection Ratio (PSRR) of up to 140 dB.
- Low Input Bias Current: Maximum of 100 pA, ideal for high-impedance sources.
- Low Supply Current: Typically 1.0 mA per amplifier.
- No External Capacitor Required: Simplifies circuit design.
- Reduced Digital Switching Noise: Minimizes noise typically found in chopper-stabilized amplifiers.
Applications
- Position and Pressure Sensors: The low drift and high precision make it ideal for sensitive measurement applications.
- Medical Equipment: Suitable for medical devices requiring high accuracy and low noise.
- Strain Gage Amplifiers: Benefits from nearly zero drift over the operating temperature range.
- Industrial Automation: Used in various industrial measurement and control systems.
- Aerospace and Defense: High precision and reliability make it suitable for critical applications in these sectors.
Q & A
- What is the typical offset voltage of the AD8628WARZ-R7?
The typical offset voltage is 1 µV.
- What is the input bias current of the AD8628WARZ-R7?
The input bias current is typically 100 pA.
- What is the common-mode rejection ratio (CMRR) of the AD8628WARZ-R7?
The CMRR is up to 140 dB.
- Does the AD8628WARZ-R7 require an external capacitor?
No, it does not require an external capacitor.
- What is the operating temperature range of the AD8628WARZ-R7?
The operating temperature range is from -40°C to +125°C.
- What is the slew rate of the AD8628WARZ-R7?
The slew rate is 1.0 V/µs.
- What is the gain bandwidth product (GBP) of the AD8628WARZ-R7?
The GBP is 2.5 MHz.
- What are the typical noise specifications of the AD8628WARZ-R7?
The voltage noise is 0.5 µV p-p (0.1 Hz to 10 Hz) and 22 nV/√Hz at 1 kHz.
- What is the supply current per amplifier for the AD8628WARZ-R7?
The supply current per amplifier is typically 1.0 mA.
- In which applications is the AD8628WARZ-R7 commonly used?
It is commonly used in position and pressure sensors, medical equipment, strain gage amplifiers, and other sensitive measurement applications.
