Datasheet LT6108-1, LT6108-2 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | High Side Current Sense Amplifier with Reference and Comparator |
| Pages / Page | 30 / 1 — FEATURES. DESCRIPTION. APPLICATIONS. TYPICAL APPLICATION. Response to … |
| File Format / Size | PDF / 361 Kb |
| Document Language | English |
FEATURES. DESCRIPTION. APPLICATIONS. TYPICAL APPLICATION. Response to Overcurrent Event
Model Line for this Datasheet
- LT6108AHMS8-1#PBF LT6108AHMS8-1#PBF LT6108AHMS8-1#TRPBF LT6108AHMS8-1#TRPBF LT6108AHMS8-2#PBF LT6108AHMS8-2#PBF LT6108AHMS8-2#TRPBF LT6108AHMS8-2#TRPBF LT6108AIMS8-1#PBF LT6108AIMS8-1#PBF LT6108AIMS8-1#TRPBF LT6108AIMS8-1#TRPBF LT6108AIMS8-2#PBF LT6108AIMS8-2#PBF LT6108AIMS8-2#TRPBF LT6108AIMS8-2#TRPBF LT6108HDCB-1#PBF LT6108HDCB-1#TRMPBF LT6108HDCB-1#TRMPBF LT6108HDCB-1#TRPBF LT6108HDCB-1#TRPBF LT6108HDCB-2#PBF LT6108HDCB-2#TRMPBF LT6108HDCB-2#TRMPBF LT6108HDCB-2#TRPBF LT6108HDCB-2#TRPBF LT6108HMS8-1#PBF LT6108HMS8-1#PBF LT6108HMS8-1#TRPBF LT6108HMS8-1#TRPBF LT6108HMS8-2#PBF LT6108HMS8-2#PBF LT6108HMS8-2#TRPBF LT6108HMS8-2#TRPBF LT6108IDCB-1#PBF LT6108IDCB-1#TRMPBF LT6108IDCB-1#TRMPBF LT6108IDCB-1#TRPBF LT6108IDCB-1#TRPBF LT6108IDCB-2#PBF LT6108IDCB-2#TRMPBF LT6108IDCB-2#TRMPBF LT6108IDCB-2#TRPBF LT6108IDCB-2#TRPBF LT6108IMS8-1#PBF LT6108IMS8-1#PBF LT6108IMS8-1#TRPBF LT6108IMS8-1#TRPBF LT6108IMS8-2#PBF LT6108IMS8-2#PBF LT6108IMS8-2#TRPBF LT6108IMS8-2#TRPBF
Text Version of Document
LT6108-1/LT6108-2 High Side Current Sense Amplifier with Reference and Comparator
FEATURES DESCRIPTION
n Current Sense Amplifier The LT®6108 is a complete high side current sense device – Fast Step Response: 500ns that incorporates a precision current sense amplifier, an – Low Offset Voltage: 125µV Maximum integrated voltage reference and a comparator. Two ver- – Low Gain Error: 0.2% Maximum sions of the LT6108 are available. The LT6108-1 has a n Internal 400mV Precision Reference latching comparator and the LT6108-2 has a non-latching n Internal Comparator comparator. In addition, the current sense amplifier and – Fast Response Time: 500ns comparator inputs and outputs are directly accessible. The – Total Threshold Error: ±1.25% Maximum amplifier gain and comparator trip point are configured – Latching or Non-Latching Comparator Option by external resistors. The open-drain comparator output n Wide Supply Range: 2.7V to 60V allows for easy interface to other system components. n Supply Current: 450µA The overal propagation delay of the LT6108 is typical y only n Low Shutdown Current: 5µA Maximum 1.4µs, allowing for quick reaction to overcurrent condi- n Specified for –40°C to 125°C Temperature Range tions. The 1MHz bandwidth allows the LT6108 to be used n Available in 8-Lead MSOP and 8-Lead (2mm × 3mm) for error detection in critical applications such as motor DFN Packages control. The high threshold accuracy of the comparator,
APPLICATIONS
combined with the ability to latch the comparator, ensures the LT6108 can capture high speed events. n Overcurrent and Fault Detection n The LT6108 is fully specified for operation from –40°C to Current Shunt Measurement n 125°C, making it suitable for industrial and automotive Battery Monitoring n applications. The LT6108 is available in the small 8-lead Motor Control n MSOP and 8-lead DFN packages. Automotive Monitoring and Control n Remote Sensing L, LT, LTC, LTM, TimerBlox, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective n Industrial Control owners.
TYPICAL APPLICATION Response to Overcurrent Event Circuit Fault Protection with Very Fast Latching Load Disconnect
0.1Ω IRF9640 12V TO LOAD VLOAD 6.2V* 1k 100Ω 0.1µF 10V/DIV SENSEHI SENSELO 0V V+ OUTA VOUT 3.3V LT6108-1 ILOAD 200mA/DIV RESET EN/RST 1k 10k 6.04k 0mA 250mA DISCONNECT 2N2700 OUTC INC VOUTC 250mA DISCONNECT V– 5V/DIV 0V 1.6k 610812 TA01a 610812 TA01b 5µs/DIV *CMH25234B 610812fa 1 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagrams Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
FEATURES DESCRIPTION
n Current Sense Amplifier The LT®6108 is a complete high side current sense device – Fast Step Response: 500ns that incorporates a precision current sense amplifier, an – Low Offset Voltage: 125µV Maximum integrated voltage reference and a comparator. Two ver- – Low Gain Error: 0.2% Maximum sions of the LT6108 are available. The LT6108-1 has a n Internal 400mV Precision Reference latching comparator and the LT6108-2 has a non-latching n Internal Comparator comparator. In addition, the current sense amplifier and – Fast Response Time: 500ns comparator inputs and outputs are directly accessible. The – Total Threshold Error: ±1.25% Maximum amplifier gain and comparator trip point are configured – Latching or Non-Latching Comparator Option by external resistors. The open-drain comparator output n Wide Supply Range: 2.7V to 60V allows for easy interface to other system components. n Supply Current: 450µA The overal propagation delay of the LT6108 is typical y only n Low Shutdown Current: 5µA Maximum 1.4µs, allowing for quick reaction to overcurrent condi- n Specified for –40°C to 125°C Temperature Range tions. The 1MHz bandwidth allows the LT6108 to be used n Available in 8-Lead MSOP and 8-Lead (2mm × 3mm) for error detection in critical applications such as motor DFN Packages control. The high threshold accuracy of the comparator,
APPLICATIONS
combined with the ability to latch the comparator, ensures the LT6108 can capture high speed events. n Overcurrent and Fault Detection n The LT6108 is fully specified for operation from –40°C to Current Shunt Measurement n 125°C, making it suitable for industrial and automotive Battery Monitoring n applications. The LT6108 is available in the small 8-lead Motor Control n MSOP and 8-lead DFN packages. Automotive Monitoring and Control n Remote Sensing L, LT, LTC, LTM, TimerBlox, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective n Industrial Control owners.
TYPICAL APPLICATION Response to Overcurrent Event Circuit Fault Protection with Very Fast Latching Load Disconnect
0.1Ω IRF9640 12V TO LOAD VLOAD 6.2V* 1k 100Ω 0.1µF 10V/DIV SENSEHI SENSELO 0V V+ OUTA VOUT 3.3V LT6108-1 ILOAD 200mA/DIV RESET EN/RST 1k 10k 6.04k 0mA 250mA DISCONNECT 2N2700 OUTC INC VOUTC 250mA DISCONNECT V– 5V/DIV 0V 1.6k 610812 TA01a 610812 TA01b 5µs/DIV *CMH25234B 610812fa 1 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagrams Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
