Overview
The AD628ARMZ-R7, produced by Analog Devices Inc., is a high common-mode voltage, programmable gain difference amplifier. This device is designed to provide excellent DC performance and high common-mode rejection over a wide range of frequencies. It is particularly suited for high voltage measurements and applications where precision and stability are crucial.
Key Specifications
| Parameter | Value |
|---|---|
| Input Common Mode Voltage Range | ±120 V |
| Differential Mode Voltage Range | Exceeds 120 V |
| Operating Temperature Range | -40°C to +85°C |
| Supply Voltage | Single or dual supplies |
| Package Type | 8-Lead MSOP |
| Bandwidth | 600 kHz |
| Input Bias Current | 2 nA (max) |
| System Gain | Fixed at 0.1 for input stage, adjustable for output buffer |
Key Features
- High common-mode voltage and differential mode voltage ranges, making it ideal for high voltage measurements.
- User-configurable output amplifier with adjustable gain.
- Low input bias current to minimize offset voltage effects.
- Remote Kelvin connection capability through the inverting input of the buffer amplifier.
- Integrated precision 10 kΩ resistor for low-pass filtering or attenuation.
- Operates from single or dual supplies.
Applications
- High voltage measurements across shunt resistors.
- Battery voltage monitoring in chargers and similar equipment.
- Current sensing in power supply applications.
- Industrial control systems requiring precise voltage measurements.
- Automotive and aerospace systems where high common-mode rejection is necessary.
Q & A
- What is the input common mode voltage range of the AD628?
The input common mode voltage range is ±120 V. - What is the differential mode voltage range of the AD628?
The differential mode voltage range exceeds 120 V. - What is the operating temperature range of the AD628?
The operating temperature range is -40°C to +85°C. - Can the AD628 operate from single or dual supplies?
Yes, the AD628 can operate from both single and dual supplies. - What is the package type of the AD628ARMZ-R7?
The package type is 8-Lead MSOP. - What is the bandwidth of the AD628?
The bandwidth is 600 kHz. - How is the system gain of the AD628 configured?
The system gain is fixed at 0.1 for the input stage and is adjustable for the output buffer using external resistors. - What is the purpose of the remote Kelvin connection in the AD628?
The remote Kelvin connection allows for precise voltage measurements by compensating for lead resistance. - How can the AD628 be used in battery voltage monitoring?
The AD628 can be used to monitor battery voltages by scaling high input voltages through a precision voltage divider. - What are some common applications of the AD628?
Common applications include high voltage measurements, battery voltage monitoring, current sensing, and industrial control systems.
