Overview
The AD629BR-REEL, produced by 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 high common-mode voltages. The AD629BR-REEL operates over a wide power supply range and offers excellent DC and AC performance characteristics, making it a versatile component for various industrial and automotive applications.
Key Specifications
| Parameter | Condition | Min | Typ | Max |
|---|---|---|---|---|
| Common-Mode Voltage Range | -270 V | +270 V | ||
| Input Protection | Common Mode | -500 V | +500 V | |
| Input Protection | Differential Mode | -500 V | +500 V | |
| Power Supply Range | ±2.5 V | ±18 V | ||
| Output Swing | VS = ±12 V | ±10 V | ||
| Power Supply Current | 1 mA | |||
| Gain Nonlinearity | VOUT = ±10 V, RL = 2 kΩ | 3 ppm | 10 ppm | |
| Offset Drift | TA = TMIN to TMAX | 10 µV/°C | 20 µV/°C | |
| Gain Drift | TA = TMIN to TMAX | 10 ppm/°C | ||
| Common-Mode Rejection Ratio (CMRR) | 500 Hz | 86 dB | ||
| Bandwidth | 500 kHz |
Key Features
- High input common-mode voltage range up to ±270 V.
- Input protection up to ±500 V in both common-mode and differential mode.
- Wide power supply range from ±2.5 V to ±18 V.
- Low offset voltage and drift (10 µV/°C for AD629B).
- Low gain error and drift (3 ppm/°C).
- Excellent CMRR over a wide frequency range (86 dB at 500 Hz for AD629B).
- High bandwidth of 500 kHz.
- Low power supply current of 1 mA maximum.
Applications
- High voltage current sensing.
- Battery cell voltage monitoring.
- Power supply current monitoring.
- Motor control systems.
- Isolation applications where galvanic isolation is not required.
Q & A
- What is the common-mode voltage range of the AD629BR-REEL? The AD629BR-REEL has a common-mode voltage range of ±270 V.
- What is the maximum differential input voltage for the AD629BR-REEL? The maximum differential input voltage is ±13 V.
- What is the power supply range for the AD629BR-REEL? The power supply range is from ±2.5 V to ±18 V.
- What is the output swing of the AD629BR-REEL on a ±12 V supply? The output swing is ±10 V on a ±12 V supply.
- What is the maximum power supply current for the AD629BR-REEL? The maximum power supply current is 1 mA.
- What is the gain nonlinearity of the AD629BR-REEL? The gain nonlinearity is 3 ppm to 10 ppm.
- What is the offset drift of the AD629BR-REEL? The offset drift is 10 µV/°C for the AD629B model.
- What is the CMRR of the AD629BR-REEL at 500 Hz? The CMRR is 86 dB at 500 Hz for the AD629B model.
- What is the bandwidth of the AD629BR-REEL? The bandwidth is 500 kHz.
- In what types of applications is the AD629BR-REEL commonly used? It is commonly used in high voltage current sensing, battery cell voltage monitoring, power supply current monitoring, motor control systems, and isolation applications where galvanic isolation is not required.
