Overview
The AD629AR-REEL, produced by Analog Devices Inc., is a high-precision difference amplifier designed for applications requiring accurate measurement of differential signals in the presence of high common-mode voltages. This device is particularly useful in scenarios where galvanic isolation is not necessary, making it a cost-effective alternative to isolation amplifiers. The AD629AR-REEL operates over a wide common-mode voltage range of ±270 V and is protected against common-mode and differential mode transients up to ±500 V. It is available in an 8-lead SOIC package and is guaranteed to perform over an industrial temperature range of −40°C to +85°C.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Amplifier Type | Current Sense / Difference Amplifier | |
| Number of Circuits | 1 | |
| Slew Rate | 2.1 V/µs (Nominal) | V/µs |
| -3db Bandwidth | 500 kHz | kHz |
| Voltage - Input Offset | 200 µV (Max) | µV |
| Current - Supply | 900 µA | µA |
| Current - Output / Channel | 25 mA | mA |
| Voltage - Supply Span (Min) | 5 V | V |
| Voltage - Supply Span (Max) | 36 V | V |
| Operating Temperature | -40°C to +85°C | °C |
| Mounting Type | Surface Mount | |
| Package/Case | 8-SOIC (0.154", 3.90mm Width) |
Key Features
- High Common-Mode Voltage Range: The AD629AR-REEL can operate with common-mode voltages up to ±270 V and is protected against transients up to ±500 V.
- Low Offset and Drift: Features low offset voltage, low offset drift, low gain error drift, and low common-mode rejection drift.
- Excellent CMRR: Provides a high common-mode rejection ratio (CMRR) of up to 86 dB at 500 Hz.
- Wide Power Supply Range: Operates with a wide power supply range of ±2.5 V to ±18 V and can deliver an output swing of ±10 V on a ±12 V supply.
- High Accuracy DC Performance: Offers high accuracy with 3 ppm maximum gain nonlinearity and 10 ppm/°C maximum gain drift.
Applications
- High Voltage Current Sensing: Ideal for measuring current in high-voltage systems without the need for galvanic isolation.
- Battery Cell Voltage Monitors: Suitable for monitoring battery cell voltages in high-voltage battery packs.
- Power Supply Current Monitors: Used in power supply systems to monitor current accurately.
- Motor Controls: Can be used in motor control systems to measure current and voltage accurately.
Q & A
- What is the common-mode voltage range of the AD629AR-REEL?
The AD629AR-REEL operates over a common-mode voltage range of ±270 V.
- What is the maximum differential input voltage for the AD629AR-REEL?
The maximum differential input voltage is ±13 V.
- What is the slew rate of the AD629AR-REEL?
The nominal slew rate is 2.1 V/µs.
- What is the bandwidth of the AD629AR-REEL?
The bandwidth is 500 kHz.
- What is the operating temperature range of the AD629AR-REEL?
The device operates over a temperature range of -40°C to +85°C.
- What type of package is the AD629AR-REEL available in?
The AD629AR-REEL is available in an 8-lead SOIC package.
- What are the key applications of the AD629AR-REEL?
Key applications include high voltage current sensing, battery cell voltage monitoring, power supply current monitoring, and motor control.
- Does the AD629AR-REEL require galvanic isolation?
No, the AD629AR-REEL does not require galvanic isolation, making it a cost-effective alternative to isolation amplifiers.
- What is the maximum power supply current of the AD629AR-REEL?
The maximum power supply current is 1 mA.
- What is the CMRR of the AD629AR-REEL at 500 Hz?
The CMRR at 500 Hz is up to 86 dB.
