Overview
The AD629BR-REEL7 from Analog Devices Inc. is a high common-mode voltage difference amplifier designed for precision measurement of differential signals in the presence of high common-mode voltages. This device is particularly useful in applications where accurate signal measurement is required despite the presence of high common-mode voltages up to ±270 V. The AD629BR-REEL7 operates over a wide power supply range of ±2.5 V to ±18 V and is known for its high accuracy DC performance and excellent AC specifications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Common-Mode Voltage Range | ±270 | V |
| Input Protection | ±500 V (common mode), ±500 V (differential mode) | V |
| Power Supply Range | ±2.5 V to ±18 V | V |
| Output Swing | ±10 V (on ±12 V supply) | V |
| Maximum Power Supply Current | 1 mA | mA |
| Gain Nonlinearity | 3 ppm (AD629B) | ppm |
| Offset Drift | 10 μV/°C (AD629B) | μV/°C |
| Gain Drift | 10 ppm/°C | ppm/°C |
| Common-Mode Rejection Ratio (CMRR) | 86 dB @ 500 Hz (AD629B) | dB |
| Bandwidth | 500 kHz | kHz |
| Slew Rate | 2.1 V/μs | V/μs |
| Settling Time | 15 μs (0.01% VOUT = 10 V step) | μs |
| Output Noise Voltage | 15 μV p-p (0.01 Hz to 10 Hz) | μV p-p |
| Operating Temperature Range | -40°C to +85°C | °C |
| Package | 8-Lead SOIC_N |
Key Features
- High common-mode voltage range up to ±270 V
- Input protection up to ±500 V (common mode and differential mode)
- Wide power supply range (±2.5 V to ±18 V)
- High accuracy DC performance with low gain nonlinearity and offset drift
- Excellent AC specifications including high CMRR and bandwidth of 500 kHz
- Low power supply current of 1 mA
- Capacitive load stable operation up to 1000 pF
- Compact 8-Lead SOIC_N package
Applications
- High voltage current sensing
- Battery cell voltage monitors
- Power supply current monitors
- Motor controls
- Isolation applications where galvanic isolation is not required
Q & A
- What is the common-mode voltage range of the AD629BR-REEL7?
The AD629BR-REEL7 has a common-mode voltage range of ±270 V.
- What is the input protection level of the AD629BR-REEL7?
The inputs are protected up to ±500 V for both common-mode and differential mode transients.
- What is the power supply range for the AD629BR-REEL7?
The device operates over a power supply range of ±2.5 V to ±18 V.
- What is the maximum output swing on a ±12 V supply?
The maximum output swing is ±10 V on a ±12 V supply.
- What is the maximum power supply current of the AD629BR-REEL7?
The maximum power supply current is 1 mA.
- What is the gain nonlinearity of the AD629B version?
The gain nonlinearity is 3 ppm for the AD629B version.
- What is the offset drift of the AD629B version?
The offset drift is 10 μV/°C for the AD629B version.
- What is the bandwidth of the AD629BR-REEL7?
The bandwidth is 500 kHz.
- What is the slew rate of the AD629BR-REEL7?
The slew rate is 2.1 V/μs.
- What are some typical applications of the AD629BR-REEL7?
Typical applications include high voltage current sensing, battery cell voltage monitors, power supply current monitors, motor controls, and isolation applications where galvanic isolation is not required.
