Features and Benefits
- Current Sense Amplifier
- Fast Step Response: 500ns
- Low Offset Voltage: 200μV Maximum
- Low Gain Error: 0.2% Maximum
- Internal 400mV Precision Reference
- Internal Comparator
- Power-On Reset Capability
- Fast Response Time: 500ns
- Total Threshold Error: ±1.25% Maximum
- Wide Supply Range: 2.7V to 60V
- Supply Current: 450μA
- Specified for –40°C to 125°C Temperature Range
- Available in 8-Lead MSOP and 8-Lead (2mm × 3mm) DFN Packages
The LT6118 is a complete high side current sense device that incorporates a precision current sense amplifier, an integrated voltage reference and a latching comparator. The comparator latch functionality can be enabled or disabled and the comparator can be configured to reset upon power-on. The input and the open-drain output of the comparator are independent from the current sense amplifier. The comparator trip point and amplifier gain are configured with external resistors.
The overall propagation delay of the LT6118 is typically only 1.4μs, allowing for quick reaction to overcurrent conditions. The 1MHz bandwidth allows the LT6118 to be used for error detection in critical applications such as motor control. The high threshold accuracy of the comparator, combined with the ability to latch the comparator, ensures the LT6118 can capture high speed events.
The LT6118 is fully specified for operation from –40°C to 125°C, making it suitable for industrial and automotive applications. The LT6118 is available in the small 8-lead MSOP and 8-lead DFN packages.
- Overcurrent and Fault Detection
- Current Shunt Measurement
- Battery Monitoring
- Motor Control
- Automotive Monitoring and Control
- Industrial Control
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
Demonstration circuit 2193A features the LT6118, a high side current sense amplifier with a comparator and a 400mV reference.
The demo board circuit amplifies the voltage across an onboard current sense resistor, to provide a precision unipolar voltage output that is proportional to the sensed current. The board has one on-board latching comparator and an integrated 400mV reference that sets the threshold for the comparator.
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:
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.