Overview
The AD628ARMZ is a high-performance, programmable gain difference amplifier manufactured by Analog Devices Inc. It is designed to provide excellent DC and AC performance, along with high common-mode rejection over a wide range of frequencies. This device is particularly suited for applications requiring the accurate amplification of low-level signals and high voltage measurements.
The AD628ARMZ features a wideband feedback loop that minimizes distortion effects, making it ideal for use with Σ-Δ ADCs. It operates on both single and dual supply voltages, ranging from 4.5V to 36V and ±2.25V to ±18V, respectively. The device is available in an 8-lead MSOP package and operates over the standard industrial temperature range of -40°C to +85°C.
Key Specifications
| Parameter | Value |
|---|---|
| Input Common Mode and Differential Mode Operating Range | ±120 V |
| Supply Voltage Range (Single/Dual) | 4.5 V to 36 V, ±2.25 V to ±18 V |
| Operating Temperature Range | -40°C to +85°C |
| Gain Range | 0.1 to 100 |
| Offset Voltage vs Temperature (RTI of input pins) | 8 μV/°C |
| Offset Range | ±1.5 mV maximum |
| CMRR RTI | 75 dB minimum at DC to 500 Hz, G = +1 |
| Quiescent Current | 1.6 mA max at TA = 25°C, VS = ±15 V, RL = 2 kΩ, REXT1 = 10 kΩ |
| Bandwidth | 600 kHz |
| Package Style | 8-lead MSOP |
| Slew Rate | 0.3 V/μs |
| Input Bias Current | 1.5 nA |
| Input Offset Voltage | 150 μV |
Key Features
- High common-mode voltage and input impedance, making it suitable for high voltage measurements across a shunt resistor.
- Programmable gain from 0.1 to 100, allowing for flexible application in various signal conditioning scenarios.
- Excellent AC and DC performance with low offset voltage and high common-mode rejection ratio (CMRR).
- Wideband feedback loop to minimize distortion effects, particularly useful with Σ-Δ ADCs.
- Remote Kelvin connection capability through the inverting input of the buffer amplifier.
- Low quiescent current and high slew rate, ensuring efficient and fast operation.
- Compact 8-lead MSOP package, suitable for space-constrained applications.
Applications
- High voltage current shunt sensing and measurement.
- Programmable logic controllers and analog input front-end signal conditioning.
- Isolation and sensor signal conditioning.
- Power supply monitoring and electrohydraulic controls.
- Motor controls and battery voltage monitoring.
- Conversion of standard control voltages or currents for use with single-supply ADCs.
Q & A
- What is the input common mode and differential mode operating range of the AD628ARMZ?
The input common mode and differential mode operating range is ±120 V.
- What are the supply voltage ranges for the AD628ARMZ?
The device operates on single supply voltages from 4.5 V to 36 V and dual supply voltages from ±2.25 V to ±18 V.
- What is the operating temperature range of the AD628ARMZ?
The operating temperature range is -40°C to +85°C.
- What is the gain range of the AD628ARMZ?
The gain range is from 0.1 to 100.
- What is the CMRR RTI of the AD628ARMZ?
The CMRR RTI is 75 dB minimum at DC to 500 Hz, G = +1.
- How much quiescent current does the AD628ARMZ consume?
The quiescent current is 1.6 mA max at TA = 25°C, VS = ±15 V, RL = 2 kΩ, REXT1 = 10 kΩ.
- What is the bandwidth of the AD628ARMZ?
The bandwidth is 600 kHz.
- What package style is the AD628ARMZ available in?
The device is available in an 8-lead MSOP package.
- What are some common applications of the AD628ARMZ?
Common applications include high voltage current shunt sensing, programmable logic controllers, analog input front-end signal conditioning, isolation, sensor signal conditioning, power supply monitoring, and motor controls.
- How does the AD628ARMZ handle remote Kelvin connections?
The inverting input of the buffer amplifier is available for making a remote Kelvin connection.
