Overview
The AD628ARMZ-RL, produced by Analog Devices Inc., is a high common-mode voltage, programmable gain difference amplifier. This component combines excellent DC performance with high common-mode rejection over a wide range of frequencies. It is particularly suited for high-voltage measurements across a shunt resistor and is versatile in various industrial and measurement applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package Type | 8-Lead MSOP | |
| Operating Temperature Range | -40°C to +85°C | |
| Supply Voltage Range | ±5 V to ±15 V | V |
| Common Mode Input Voltage Range | ±120 V | V |
| Differential Mode Input Voltage Range | ±120 V | V |
| Bandwidth | 600 kHz | Hz |
| Common Mode Rejection Ratio (CMRR) | 75 dB (min) | dB |
| Input Bias Current | 2 nA (max) | A |
| Dimensions | 3 x 3 x 0.85 mm | mm |
Key Features
- High Common-Mode Voltage: The AD628 can handle common-mode input voltages up to ±120 V, making it suitable for high-voltage measurements.
- Programmable Gain: The output buffer amplifier gain is user-adjustable, allowing for flexible system gain configurations.
- Low Input Bias Current: The input bias current of the buffer amplifier is very low, minimizing offset voltage effects.
- Remote Kelvin Connection: The inverting input of the buffer amplifier is available for making remote Kelvin connections.
- Low-Pass Filter Capability: A precision 10 kΩ resistor and an external capacitor can be used to implement a low-pass filter.
- Single and Dual Supply Operation: The AD628 can operate from single and dual supplies, enhancing its versatility in different applications.
Applications
- High-Voltage Measurements: Ideal for measuring high voltages across shunt resistors in industrial and automotive applications.
- Current Sensing: Used in current sensing applications where high accuracy and common-mode rejection are required.
- Industrial Automation: Suitable for use in industrial automation systems where high-voltage signals need to be accurately measured and processed.
- Power Line Monitoring: Can be used to monitor and measure power line voltages, including peaks and surges.
- ADC Interface: Facilitates the conversion of various input polarities and amplitudes to a single-supply ADC input.
Q & A
- What is the common-mode input voltage range of the AD628ARMZ-RL?
The common-mode input voltage range is ±120 V.
- What is the bandwidth of the AD628ARMZ-RL?
The bandwidth is 600 kHz.
- Can the AD628ARMZ-RL operate from single and dual supplies?
- What is the typical application of the AD628ARMZ-RL in industrial settings?
- How is the gain of the AD628ARMZ-RL adjusted?
The gain is adjusted using external resistors (REXT1 and REXT2) connected to the output buffer amplifier.
- What is the input bias current of the buffer amplifier in the AD628ARMZ-RL?
The input bias current is 2 nA (max).
- Can the AD628ARMZ-RL be used for remote Kelvin connections?
- What is the operating temperature range of the AD628ARMZ-RL?
- How does the AD628ARMZ-RL handle power line peaks and surges?
- Can the AD628ARMZ-RL be used to interface with an ADC?
