Features

• 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

Typical Application

Description

The LT®6118 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.