Overview
The AD628ARZ-R7 from Analog Devices Inc. is a high common-mode voltage, programmable gain difference amplifier. This component is designed to combine excellent DC performance with high common-mode rejection over a wide range of frequencies. It is particularly suited for applications requiring precise measurement and signal conditioning in high-voltage environments.
Key Specifications
| Attribute | Value |
|---|---|
| Manufacturer | Analog Devices Inc. |
| Part Number | AD628ARZ-R7 |
| Package | 8-Lead SOIC |
| Operating Temperature Range | -40°C to +85°C |
| Supply Voltage Range | Dual: ±2.25 V to ±18 V, Single: 4.5 V to 36 V |
| Common-Mode Input Voltage Range | ±120 V at VS = ±15 V |
| Gain Range | 0.1 to 100 |
| Common Mode Rejection Ratio (CMRR) | 75 dB minimum, DC to 500 Hz, G = +1 |
| Input Bias Current | 1.5 nA |
| Offset Voltage | ±1.5 mV maximum |
| Power Supply Rejection Ratio (PSRR) | 77 dB |
Key Features
- High common-mode input voltage range up to ±120 V at VS = ±15 V
- Programmable gain from 0.1 to 100
- Excellent AC and DC performance
- Low input bias current of 1.5 nA
- High common-mode rejection ratio (CMRR) of 75 dB minimum
- Offset temperature stability: 10 μV/°C maximum
- Available in 8-lead SOIC and MSOP packages
- Inverting input of the buffer amplifier available for remote Kelvin connection
Applications
- High voltage current shunt sensing
- Programmable logic controllers
- Analog input front-end signal conditioning
- Battery voltage monitoring in battery chargers
- Power supply applications where high common-mode voltages are encountered
Q & A
- What is the common-mode input voltage range of the AD628ARZ-R7?
The common-mode input voltage range is up to ±120 V at VS = ±15 V.
- What is the gain range of the AD628ARZ-R7?
The gain range is from 0.1 to 100.
- What is the operating temperature range of the AD628ARZ-R7?
The operating temperature range is -40°C to +85°C.
- What are the supply voltage options for the AD628ARZ-R7?
The component can operate from dual supplies (±2.25 V to ±18 V) and single supplies (4.5 V to 36 V).
- What is the common-mode rejection ratio (CMRR) of the AD628ARZ-R7?
The CMRR is 75 dB minimum, DC to 500 Hz, G = +1.
- What is the input bias current of the AD628ARZ-R7?
The input bias current is 1.5 nA.
- What is the offset voltage of the AD628ARZ-R7?
The offset voltage is ±1.5 mV maximum.
- What are some typical applications of the AD628ARZ-R7?
Typical applications include high voltage current shunt sensing, programmable logic controllers, analog input front-end signal conditioning, and battery voltage monitoring.
- What package types are available for the AD628ARZ-R7?
The component is available in 8-lead SOIC and MSOP packages.
- How can the gain of the AD628ARZ-R7 be adjusted?
The gain can be adjusted using external resistors (REXT1 and REXT2) connected to the output buffer amplifier.
