Features and Benefits
- Typical 0.1 μV/°C offset drift
- Maximum ±400 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 operating
−4 V to +85 V survival
- Initial gain = 20 V/V
- Wide operating temperature range:
−40°C to +125°C
- Bidirectional operation
- Available in 8-lead SOIC and 8-lead MSOP
- Common-mode rejection ratio (CMRR): 86 dB, dc to 10 kHz
- Qualified for automotive applications
The AD8418 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 AD8418 offers excellent input common-mode rejection from −2 V to +70 V. The AD8418 performs bidirectional current measurements across a shunt resistor in a variety of automotive and industrial applications, including motor control, battery management, and solenoid control.
The AD8418 offers breakthrough performance throughout the −40°C to +125°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 AD8418 is fully qualified for automotive applications and 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 ±200 μV. The AD8418 is offered in 8-lead MSOP and SOIC packages.
- High-side current sensing in
- Low-side current sensing
- Diagnostic protection
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)
The AD8418-EVALZ is designed to aid in the evaluation of current sense amplifiers.Enables quick breadboarding/protoyping and is easily configurable for unidirectional or bidirectional operation.
The AD8418-EVALZ accommodates the AD8418 in an MSOP package.
Features & Benefits
- Enables quick breadboarding/protoyping
- Easily configurable for unidirectional or bidirectional operation
- Includes provision for current sense resistor
- Easy connection to test equipment
Tools & Simulations
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:
ADIsimPE, which is powered by SIMetrix/SIMPLIS, is a circuit simulation suite optimized for the design and development of analog and mixed signal circuits. SIMetrix mode is ideal for the simulation of general non-switching circuits. It provides full Pspice compatibility for use with industry-standard SPICE models. SIMPLIS (SIMulation Piecewise-Linear System) mode simulates the operation of switching circuits with vastly improved robustness, speed, and accuracy compared to standard SPICE. It is particularly useful for switching power supply, PLLs, and ADC/DAC applications.
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.
Sample & Buy
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.