Overview
The AD629ARZ-RL, manufactured by Analog Devices Inc., is a high-performance difference amplifier designed to handle high common-mode voltage ranges. This precision device is ideal for accurately measuring differential signals in the presence of high common-mode voltages, up to ±270 V. It is particularly useful in applications where galvanic isolation is not required, offering a cost-effective alternative to isolation amplifiers.
The AD629ARZ-RL operates over a wide power supply range of ±2.5 V to ±18 V and features low offset, low offset drift, and low gain error drift. It is available in an 8-lead SOIC package and is guaranteed to perform over the industrial temperature range of −40°C to +85°C.
Key Specifications
| Parameter | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Gain | VOUT = ±10 V, RL = 2 kΩ | 1 | 1 | 1 | V/V |
| Gain Error | VOUT = ±10 V, RL = 2 kΩ | 0.01 | 0.05 | 0.03 | % |
| Gain Nonlinearity | RL = 2 kΩ | 4 | 10 | 3 | ppm |
| Offset Voltage | VS = ±15 V | 0.2 | 1 | 0.5 | mV |
| Common-Mode Voltage Range | −270 | +270 | V | ||
| Power Supply Range | ±2.5 | ±18 | V | ||
| Bandwidth | 500 | kHz | |||
| Slew Rate | 1.7 | 2.1 | V/μs | ||
| Common-Mode Rejection Ratio (CMRR) | @ 500 Hz | 77 | 86 | dB |
Key Features
- High common-mode voltage range up to ±270 V
- Input protection up to ±500 V common mode and ±500 V differential mode
- Low offset voltage and low offset drift (10 μV/°C for AD629B)
- Low gain error and gain nonlinearity (3 ppm maximum for AD629B)
- Excellent common-mode rejection ratio (CMRR) over a wide frequency range (77 dB to 86 dB @ 500 Hz)
- Wide power supply range (±2.5 V to ±18 V)
- High bandwidth (500 kHz) and slew rate (1.7 V/μs to 2.1 V/μs)
- Low quiescent current and stable operation with capacitive loads up to 1000 pF
Applications
- High voltage current sensing
- Battery cell voltage monitors
- Power supply current monitors
- Motor controls
- Isolation applications where galvanic isolation is not required
- Energy management systems
Q & A
- What is the common-mode voltage range of the AD629ARZ-RL?
The AD629ARZ-RL has a common-mode voltage range of up to ±270 V.
- What is the input protection level for the AD629ARZ-RL?
The inputs are protected from common-mode or differential mode transients up to ±500 V.
- What is the operating temperature range for the AD629ARZ-RL?
The device operates over the industrial temperature range of −40°C to +85°C.
- What is the bandwidth of the AD629ARZ-RL?
The bandwidth of the AD629ARZ-RL is 500 kHz.
- What is the slew rate of the AD629ARZ-RL?
The slew rate is between 1.7 V/μs and 2.1 V/μs.
- What is the common-mode rejection ratio (CMRR) of the AD629ARZ-RL?
The CMRR is at least 77 dB to 86 dB @ 500 Hz.
- What are the typical applications of the AD629ARZ-RL?
Typical applications include high voltage current sensing, battery cell voltage monitors, power supply current monitors, motor controls, and isolation applications.
- What package types are available for the AD629ARZ-RL?
The AD629ARZ-RL is available in an 8-lead SOIC package.
- Is the AD629ARZ-RL RoHS compliant?
Yes, the AD629ARZ-RL is RoHS compliant.
- What is the maximum output short-circuit current of the AD629ARZ-RL?
The maximum output short-circuit current is ±25 mA.
