Overview
The AD629BRZ-R7, produced by Analog Devices Inc., is a high-performance difference amplifier designed to accurately measure differential signals in the presence of high common-mode voltages. This precision device is particularly useful in applications where high common-mode voltage ranges are encountered, such as in industrial, automotive, and power supply monitoring systems. The AD629BRZ-R7 operates over a wide common-mode voltage range of ±270 V and offers excellent common-mode rejection ratio (CMRR) and low offset drift, making it an ideal choice for demanding applications.
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 |
| Gain Nonlinearity | 3 ppm (AD629B) | |
| Offset Drift | 10 μV/°C (AD629B), 20 μV/°C (AD629A) | μV/°C |
| Gain Drift | 10 ppm/°C | ppm/°C |
| CMRR @ 500 Hz | 77 dB (AD629A), 86 dB (AD629B) | dB |
| Bandwidth | 500 kHz | kHz |
| Slew Rate | 1.7 to 2.1 V/μs | V/μs |
| Full Power Bandwidth | 28 kHz (VOUT = 20 V p-p) | kHz |
| Settling Time | 12 μs (0.1%, VOUT = 10 V step), 15 μs (0.01%, VOUT = 10 V step) | μs |
| Output Noise Voltage | 15 μV p-p (0.01 Hz to 10 Hz), 550 nV/√Hz (≥100 Hz) | μV p-p, nV/√Hz |
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 from ±2.5 V to ±18 V
- Low offset and low offset drift
- Excellent CMRR over a wide frequency range
- Low gain error and gain drift
- High accuracy DC performance
- Capacitive load stable operation up to 1000 pF
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 AD629BRZ-R7?
The AD629BRZ-R7 has a common-mode voltage range of ±270 V. - What is the input protection of the AD629BRZ-R7?
The AD629BRZ-R7 has input protection up to ±500 V for both common-mode and differential-mode transients. - What is the power supply range for the AD629BRZ-R7?
The power supply range for the AD629BRZ-R7 is from ±2.5 V to ±18 V. - What is the maximum output swing on a ±12 V supply for the AD629BRZ-R7?
The maximum output swing on a ±12 V supply is ±10 V. - What is the maximum power supply current for the AD629BRZ-R7?
The maximum power supply current is 1 mA. - What are the typical applications of the AD629BRZ-R7?
The AD629BRZ-R7 is typically 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. - What is the CMRR of the AD629BRZ-R7 at 500 Hz?
The CMRR at 500 Hz is 77 dB for the AD629A and 86 dB for the AD629B. - What is the bandwidth of the AD629BRZ-R7?
The bandwidth of the AD629BRZ-R7 is 500 kHz. - Is the AD629BRZ-R7 stable with capacitive loads?
Yes, the AD629BRZ-R7 is stable with capacitive loads up to 1000 pF. - What is the settling time of the AD629BRZ-R7?
The settling time is 12 μs for 0.1% accuracy and 15 μs for 0.01% accuracy for a 10 V output step.
