Overview
The AD8418AWHRMZ-RL is a high-voltage, high-resolution current shunt amplifier produced by Analog Devices Inc. This device is designed for precise current measurements in various automotive and industrial applications. It features an initial gain of 20 V/V with a maximum ±0.15% gain error over the entire temperature range, ensuring high accuracy and reliability. The AD8418AWHRMZ-RL is AEC-Q100 qualified for automotive applications and offers excellent input common-mode rejection, making it suitable for high-side and low-side current sensing in motor controls, solenoid controls, and power management systems.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Gain | 20 | - | - | V/V |
| Gain Error Over Temperature | - | - | ±0.15% | - |
| Input Voltage Range (Common Mode) | -2 | - | 70 | V |
| Common-Mode Rejection Ratio (CMRR) | 90 | 100 | - | dB |
| Output Voltage Range | 0.032 VS - 0.032 V | - | - | V |
| Output Resistance | - | - | 2 | Ω |
| Operating Temperature Range | -40 | - | 150 | °C |
| Power Supply Operating Range | 2.7 | - | 5.5 | V |
| Quiescent Current | - | - | 4.2 | mA |
Key Features
- Bidirectional Operation: The AD8418AWHRMZ-RL can perform bidirectional current measurements across a shunt resistor.
- High Common-Mode Rejection: Excellent input common-mode rejection from -2 V to +70 V, with a CMRR of 90 dB.
- Zero Drift Architecture: Features a novel zero drift architecture that maintains low offset and offset drift without compromising bandwidth.
- Wide Operating Temperature Range: Operates from -40°C to +150°C, making it suitable for harsh environments.
- EMI Filters and Proprietary Circuitry: Includes EMI filters and patented circuitry to ensure output accuracy even with fast-changing common-mode inputs.
- AEC-Q100 Qualified: Qualified for automotive applications, ensuring reliability and performance in automotive systems.
Applications
- High-Side Current Sensing: Ideal for motor controls, solenoid controls, and power management systems.
- Low-Side Current Sensing: Suitable for various industrial applications requiring precise current measurements.
- Diagnostic Protection: Used in diagnostic protection circuits to ensure system reliability and safety.
- Automotive Systems: AEC-Q100 qualified, making it a reliable choice for automotive applications.
Q & A
- What is the initial gain of the AD8418AWHRMZ-RL?
The initial gain of the AD8418AWHRMZ-RL is 20 V/V.
- What is the maximum gain error over the entire temperature range?
The maximum gain error over the entire temperature range is ±0.15%.
- What is the input voltage range for common-mode operation?
The input voltage range for common-mode operation is from -2 V to +70 V.
- What is the common-mode rejection ratio (CMRR) of the AD8418AWHRMZ-RL?
The CMRR is 90 dB.
- What is the operating temperature range of the AD8418AWHRMZ-RL?
The operating temperature range is from -40°C to +150°C.
- Is the AD8418AWHRMZ-RL AEC-Q100 qualified?
Yes, the AD8418AWHRMZ-RL is AEC-Q100 qualified for automotive applications.
- What is the quiescent current of the AD8418AWHRMZ-RL?
The quiescent current is up to 4.2 mA.
- What is the power supply operating range of the AD8418AWHRMZ-RL?
The power supply operating range is from 2.7 V to 5.5 V.
- Does the AD8418AWHRMZ-RL support bidirectional current measurements?
Yes, the AD8418AWHRMZ-RL supports bidirectional current measurements.
- What is the bandwidth of the AD8418AWHRMZ-RL?
The small signal -3 dB bandwidth is 250 kHz.
