Overview
The AD8418AWHRZ-RL is a high-precision, low-power current sense amplifier produced by Analog Devices Inc. This device is designed for high-voltage and high-resolution applications, particularly in automotive and industrial environments. It features a unique zero-drift architecture that ensures accurate amplification of small differential current shunt voltages despite rapidly changing common-mode voltages.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Power Supply Voltage Range | 2.7 | 5.5 | V | |
| Quiescent Current | 2.6 | mA | ||
| Operating Temperature Range | -40 | 125 | °C | |
| Gain | 20 | V/V | ||
| Gain Error Over Temperature | ±0.15% | |||
| Voltage Offset | ±200 | ±400 | μV | |
| Offset Drift | 0.1 | μV/°C | ||
| Common-Mode Rejection Ratio (CMRR) | 86 | 100 | dB | |
| Slew Rate | 1 | V/μs | ||
| -3 dB Bandwidth | 250 | kHz |
Key Features
- High-Precision Amplification: The AD8418AWHRZ-RL features a zero-drift architecture, ensuring minimal offset drift of less than 0.1 μV/°C and a maximum voltage offset of ±400 μV over the full temperature range.
- Low Power Consumption: Operates with a quiescent current of 2.6 mA, making it suitable for power-constrained designs.
- Wide Operating Range: Supports a power supply voltage range from 2.7 V to 5.5 V and an operating temperature range from -40°C to +125°C.
- High Common-Mode Rejection Ratio (CMRR): Offers a CMRR of up to 100 dB, ensuring excellent rejection of common-mode signals.
- Compact Packaging: Available in an 8-lead SOIC package, ideal for space-constrained designs.
- Automotive Grade: Qualified for automotive applications, ensuring robust operation in harsh environments.
Applications
- High-Side Current Sensing: Used in motor controls, solenoid controls, and power management systems.
- Low-Side Current Sensing: Suitable for various industrial instrumentation and diagnostic protection applications.
- Automotive Systems: Ideal for automotive applications requiring precise current sensing and robust operation.
- Industrial Automation: Used in industrial control systems, power supplies, and other high-reliability applications.
Q & A
- What is the primary function of the AD8418AWHRZ-RL?
The AD8418AWHRZ-RL is a high-precision current sense amplifier designed to accurately amplify small differential current shunt voltages.
- What is the operating temperature range of the AD8418AWHRZ-RL?
The device operates over a temperature range from -40°C to +125°C.
- What is the typical quiescent current of the AD8418AWHRZ-RL?
The quiescent current is typically 2.6 mA.
- What is the gain of the AD8418AWHRZ-RL?
The initial gain is 20 V/V with a maximum gain error of ±0.15% over the entire temperature range.
- What is the common-mode rejection ratio (CMRR) of the AD8418AWHRZ-RL?
The CMRR is up to 100 dB.
- Is the AD8418AWHRZ-RL suitable for automotive applications?
Yes, it is qualified for automotive applications and meets the necessary reliability and quality standards.
- What is the slew rate of the AD8418AWHRZ-RL?
The slew rate is 1 V/μs.
- What is the -3 dB bandwidth of the AD8418AWHRZ-RL?
The -3 dB bandwidth is 250 kHz.
- Is the AD8418AWHRZ-RL RoHS compliant?
Yes, it is compliant with the RoHS3 directive.
- What are the typical applications of the AD8418AWHRZ-RL?
It is used in high-side and low-side current sensing, motor controls, solenoid controls, power management, and industrial instrumentation.
