LT6108 - High Side Current Sense Amplifier with Reference and Comparator
The LT®6108 is a complete high side current sense device that incorporates a precision current sense amplifier, an integrated voltage reference and a comparator. Two versions of the LT6108 are available. The LT6108-1 has a latching comparator and the LT6108-2 has a non-latching comparator. In addition, the current sense amplifier and comparator inputs and outputs are directly accessible. The amplifier gain and comparator trip point are configured by external resistors. The open-drain comparator output allows for easy interface to other system components.
The overall propagation delay of the LT6108 is typically only 1.4μs, allowing for quick reaction to overcurrent conditions. The 1MHz bandwidth allows the LT6108 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 LT6108 can capture high speed events.
The LT6108 is fully specified for operation from –40°C to 125°C, making it suitable for industrial and automotive applications. The LT6108 is available in the small 8-lead MSOP and 8-lead DFN packages.
Features
Typical Application  | Applications
Packaging    |
| Part Number | Package | Temp | Price(1-99) | Price (1k)* |
|---|---|---|---|---|
| LT6108AHMS8-1#PBF | MS-8 | H | $2.63 | $1.89 |
| LT6108AHMS8-1#TRPBF | MS-8 | H | $1.95 | |
| LT6108AHMS8-2#PBF | MS-8 | H | $2.63 | $1.89 |
| LT6108AHMS8-2#TRPBF | MS-8 | H | $1.95 | |
| LT6108AIMS8-1#PBF | MS-8 | I | $2.35 | $1.69 |
| LT6108AIMS8-1#TRPBF | MS-8 | I | $1.75 | |
| LT6108AIMS8-2#PBF | MS-8 | I | $2.35 | $1.69 |
| LT6108AIMS8-2#TRPBF | MS-8 | I | $1.75 | |
| LT6108HDCB-1#PBF | 2x3 DFN-8 | H | $2.42 | |
| LT6108HDCB-1#TRMPBF | 2x3 DFN-8 | H | $2.42 | $1.79 |
| LT6108HDCB-1#TRPBF | 2x3 DFN-8 | H | $1.74 | |
| LT6108HDCB-2#PBF | 2x3 DFN-8 | H | $2.42 | |
| LT6108HDCB-2#TRMPBF | 2x3 DFN-8 | H | $2.42 | $1.79 |
| LT6108HDCB-2#TRPBF | 2x3 DFN-8 | H | $1.74 | |
| LT6108HMS8-1#PBF | MS-8 | H | $2.36 | $1.68 |
| LT6108HMS8-1#TRPBF | MS-8 | H | $1.74 | |
| LT6108HMS8-2#PBF | MS-8 | H | $2.36 | $1.68 |
| LT6108HMS8-2#TRPBF | MS-8 | H | $1.74 | |
| LT6108IDCB-1#PBF | 2x3 DFN-8 | I | $2.16 | |
| LT6108IDCB-1#TRMPBF | 2x3 DFN-8 | I | $2.16 | $1.60 |
| LT6108IDCB-1#TRPBF | 2x3 DFN-8 | I | $1.55 | |
| LT6108IDCB-2#PBF | 2x3 DFN-8 | I | $2.16 | |
| LT6108IDCB-2#TRMPBF | 2x3 DFN-8 | I | $2.16 | $1.60 |
| LT6108IDCB-2#TRPBF | 2x3 DFN-8 | I | $1.55 | |
| LT6108IMS8-1#PBF | MS-8 | I | $2.10 | $1.49 |
| LT6108IMS8-1#TRPBF | MS-8 | I | $1.55 | |
| LT6108IMS8-2#PBF | MS-8 | I | $2.10 | $1.49 |
| LT6108IMS8-2#TRPBF | MS-8 | I | $1.55 |
Demo Boards
| Part Number | Description | Price |
|---|---|---|
| DC1699A-A | LT6108-1 | High Side Current Sense Amplifier w/ Reference and a Comparator | $50.00 |
| DC1699A-B | LT6108-2 | High Side Current Sense Amplifier w/ Reference and a Comparator | $50.00 |
