Datasheet LT6119-1, LT6119-2 (Analog Devices)

LT6119-1/LT6119-2 Current Sense Amplifier, Reference and Comparators with POR
FeaTures DescripTion
n Current Sense Amplifier The LT®6119 is a complete high side current sense device – Fast Step Response: 500ns that incorporates a precision current sense amplifier, an – Low Offset Voltage: 200µV Maximum integrated voltage reference and two latching comparators. – Low Gain Error: 0.2% Maximum Two versions of the LT6119 are available. The LT6119-1 n Internal 400mV Precision Reference has the comparators connected in opposing polarity and n Internal Latching Comparators the LT6119-2 has the comparators connected in the same – Power-On Reset Capability polarity. The comparator latch functionality can be enabled – Fast Response Time: 500ns or disabled and the comparators can be configured to reset – Total Threshold Error: ±1.25% Maximum upon power-on. The input and the open-drain outputs of – Two Comparator Polarity Options the comparators are independent from the current sense n Wide Supply Range: 2.7V to 60V amplifier. The comparator trip points and amplifier gain n Supply Current: 550µA are configured with external resistors. n Specified for –40°C to 125°C Temperature Range The overall propagation delay of the LT6119 is typically n Available in 10-Lead MSOP Package only 1.4µs, allowing for quick reaction to overcurrent and undercurrent conditions. The 1MHz bandwidth allows the
applicaTions
LT6119 to be used for error detection in critical applica- tions such as motor control. The high threshold accuracy n Overcurrent, Undercurrent and Fault Detection of the comparators, combined with the ability to latch n Current Shunt Measurement both comparators, ensures the LT6119 can capture high n Battery Monitoring speed events. n Motor Control n Automotive Monitoring and Control The LT6119 is fully specified for operation from –40°C n Industrial Control to 125°C, making it suitable for industrial and automo- L, LT, LTC, LTM, TimerBlox, Linear Technology and the Linear logo are registered trademarks of tive applications. The LT6119 is available in a small Linear Technology Corporation. All other trademarks are the property of their respective owners. 10-lead MSOP.
Typical applicaTion Fast Acting Fault Protection with Power-On Reset and Early Warning Response to Overcurrent Event
0.1Ω IRF9640 12V TO LOAD VLOAD 6.2V* 1k 3.3V 100Ω 0.1µF 10V/DIV 24.9k SENSEHI SENSELO 0V V+ OUTA V 10k 1.62k 100k OUT ILOAD LT6119-2 LE 6.04k 200mA/DIV 100nF INC2 0mA 1k VOUTC1 2.37k 5V/DIV 250mA DISCONNECT 100mA WARNING OUTC2 0V 2N2700 OUTC1 INC1 VOUTC2 250mA DISCONNECT 100mA WARNING V– 5V/DIV 1.6k 0V 5µs/DIV 611912 TA01b *CMH25234B 611912 TA01a 611912f For more information www.linear.com/LT6119-1 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagrams Applications Information Typical Applications Package Description Typical Application Related Parts