Overview
Features and Benefits
- Typical 0.1 μV/°C offset drift
- Maximum ±200 μV voltage offset over full temperature range
- 2.7 V to 5.5 V power supply operating range
- Electromagnetic interference (EMI) filters included
- High common-mode input voltage range
- −2 V to +70 V, continuous operation
- −3 V to +80 V, continuous survival
- Minimum DC common-mode rejection ratio (CMRR): 90 dB
- Initial gain = 20 V/V
- Wide operating temperature range
- AD8418AWB and AD8418AB: −40°C to +125°C
- AD8418AWH: −40°C to +150°C
- Bidirectional operation
- Available in 8-lead SOIC_N, 8-lead MSOP, and FMEA tolerant
- 10-lead MSOP pinout
- AEC-Q100 qualified for automotive applications
Product Details
The AD8418A is a high voltage, high resolution current shunt amplifier. It features an initial gain of 20 V/V, with a maximum ±0.15% gain error over the entire temperature range. The buffered output voltage directly interfaces with any typical converter. The AD8418A offers excellent input common-mode rejection from −2 V to +70 V. The AD8418A performs bidirectional current measurements across a shunt resistor in a variety of automotive and industrial applications, including motor control, power management, and solenoid control.
The AD8418A offers breakthrough performance throughout the −40°C to +150°C temperature range. It features a zero drift core, which leads to a typical offset drift of 0.1 μV/°C throughout the operating temperature range and the common-mode voltage range. The AD8418A is qualified for automotive applications. The device includes EMI filters and patented circuitry to enable output accuracy with pulse-width modulation (PWM) type input common-mode voltages. The typical input offset voltage is ±100 μV. The AD8418A is offered in an 8-lead MSOP and an 8-lead SOIC_N package with a 10-lead MSOP pinout option engineered for failure mode and effects analysis (FMEA).
Applications
- High-side current sensing in
- Motor controls
- Solenoid controls
- Power management
- Low-side current sensing
- Diagnostic protection
Product Categories
Markets and Technologies
Product Lifecycle
Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (1)
Documentation & Resources
Tools & Simulations
LTspice
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Models for the following parts are available in LTspice:
AD8418A
SPICE Model
CIR
AD8418A SPICE Macro Model
2.49 K
Reference Designs (1)
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
| Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| AD8418ABRMZ | Material Declaration | Reliability Data | 8-Lead MSOP | |
| AD8418ABRMZ-RL | Material Declaration | Reliability Data | 8-Lead MSOP | |
| AD8418AWBRMZ | Material Declaration | Reliability Data | 8-Lead MSOP | |
| AD8418AWBRMZ-10 | Material Declaration | Reliability Data | 10-Lead MSOP | |
| AD8418AWBRMZ-10RL | Material Declaration | Reliability Data | 10-Lead MSOP | |
| AD8418AWBRMZ-RL | Material Declaration | Reliability Data | 8-Lead MSOP | |
| AD8418AWBRZ | Material Declaration | Reliability Data | 8-Lead SOIC | |
| AD8418AWBRZ-RL | Material Declaration | Reliability Data | 8-Lead SOIC | |
| AD8418AWHRMZ | Material Declaration | Reliability Data | 8-Lead MSOP | |
| AD8418AWHRMZ-RL | Material Declaration | Reliability Data | 8-Lead MSOP | |
| AD8418AWHRZ | Material Declaration | Reliability Data | 8-Lead SOIC | |
| AD8418AWHRZ-RL | Material Declaration | Reliability Data | 8-Lead SOIC | |
| Wafer Fabrication Data |
PCN-PDN Information
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Support & Discussions
AD8418A Discussions
RE: AD8418 or other Recommendation for the customer's requirement
14 week(s) ago in Amplifiers
Sample & Buy
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.