LT6100 - Precision, Gain Selectable High Side Current Sense Amplifier
Features
- Input Offset Voltage: 300µV (Max)
- Sense Inputs Up to 48V
- 0.5% Gain Accuracy
- Pin Selectable Gain: 10, 12.5, 20, 25, 40, 50V/V
- Separate Power Supply: 2.7V to 36V
- Operating Current: 60µA
- Sense Input Current (VCC Powered Down): 1nA
- Reverse Battery Protected to -48V
- Buffered Output
- Noise Filtering Input
- -40°C to 125°C Operating Temperature Range
- Available in 8-Lead DFN and MSOP Packages
AEC-Q100 data available for specific packages
Typical Application
Description
The LT6100 is a complete micropower, precision, high side current sense amplifier. The LT6100 monitors unidirectional currents via the voltage across an external sense resistor. Fixed gains of 10, 12.5, 20, 25, 40, 50V/V are obtained by simply strapping or floating two gain select pins. Gain accuracy is better than 0.5% for all gains.The LT6100 sense inputs have a voltage range that extends from 4.1V to 48V, and can withstand a differential voltage of the full supply. This makes it possible to monitor the voltage across a MOSFET switch or a fuse. The part can also withstand a reverse battery condition on the inputs.
Input offset is a low 300µV. CMRR and PSRR are in excess of 105dB, resulting in a wide dynamic range. A filter pin is provided to easily implement signal filtering with a single capacitor.
The LT6100 has a separate supply input, which operates from 2.7V to 36V and draws only 60µA. When VCC is powered down, the sense pins are biased off. This prevents loading of the monitored circuit, irrespective of the sense voltage. The LT6100 is available in an 8-lead DFN and MSOP package.
Packaging
CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.
For complete and up to date package information and drawings, please refer to our packaging page
| Part Number | Package | Code | Temp | Package Drawing |
RoHS |
|---|---|---|---|---|---|
| LT6100CDD#PBF | 3x3 DFN-8 | DD | C | 05-08-1698 | Yes |
| LT6100CDD#TRPBF | 3x3 DFN-8 | DD | C | 05-08-1698 | Yes |
| LT6100CMS8#PBF | MS-8 | MS8 | C | 05-08-1660 | Yes |
| LT6100CMS8#TRPBF | MS-8 | MS8 | C | 05-08-1660 | Yes |
| LT6100HDD#PBF | 3x3 DFN-8 | DD | H | 05-08-1698 | Yes |
| LT6100HDD#TRPBF | 3x3 DFN-8 | DD | H | 05-08-1698 | Yes |
| LT6100HMS8#PBF | MS-8 | MS8 | H | 05-08-1660 | Yes |
| LT6100HMS8#TRPBF | MS-8 | MS8 | H | 05-08-1660 | Yes |
| LT6100IDD#PBF | 3x3 DFN-8 | DD | I | 05-08-1698 | Yes |
| LT6100IDD#TRPBF | 3x3 DFN-8 | DD | I | 05-08-1698 | Yes |
| LT6100IMS8#PBF | MS-8 | MS8 | I | 05-08-1660 | Yes |
| LT6100IMS8#TRPBF | MS-8 | MS8 | I | 05-08-1660 | Yes |
Order Info
- Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
- Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
- Please refer to our general ordering information or the product datasheet for more details
Package Variations and Pricing
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LT6100CDD#PBF | 3x3 DFN-8 | C | $1.69 | $1.18 | Yes | |
| LT6100CDD#TRPBF | 3x3 DFN-8 | C | $1.28 | Yes | ||
| LT6100CMS8#PBF | MS-8 | C | $1.69 | $1.18 | Yes | |
| LT6100CMS8#TRPBF | MS-8 | C | $1.24 | Yes | ||
| LT6100HDD#PBF | 3x3 DFN-8 | H | $2.11 | $1.48 | Yes | |
| LT6100HDD#TRPBF | 3x3 DFN-8 | H | $1.58 | Yes | ||
| LT6100HMS8#PBF | MS-8 | H | $2.11 | $1.48 | Yes | |
| LT6100HMS8#TRPBF | MS-8 | H | $1.54 | Yes | ||
| LT6100IDD#PBF | 3x3 DFN-8 | I | $1.94 | $1.36 | Yes | |
| LT6100IDD#TRPBF | 3x3 DFN-8 | I | $1.46 | Yes | ||
| LT6100IMS8#PBF | MS-8 | I | $1.94 | $1.36 | Yes | |
| LT6100IMS8#TRPBF | MS-8 | I | $1.42 | Yes | ||
| Buy Now • Request Samples | ||||||
Demo Boards
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC1114A | LT6100 Current Sense Demo Board | $50.00 | |
| DC907A-B | LTC6102, LT6100, LT1787, LTC2054, and LTC2439-1 (Requires DC590B) | Demo Board | $150.00 | |
| Buy Now | |||
Companion Boards
| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC590B | Isolated USB Serial Controller for Linear Technology QuikEval-Compatible Demo Boards | $50.00 | |
| Buy Now | |||
Designed for Automotive and Transportation Applications
AEC-Q100 data is available for these specific part numbers. Please contact your local sales representative for more information regarding reliability reports or to inquire about parts that are not included. For more information, view our Automotive and Transportation page
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LT6100HDD#PBF | 3x3 DFN-8 | H | $2.11 | $1.48 | Yes | |
| LT6100HDD#TRPBF | 3x3 DFN-8 | H | $1.58 | Yes | ||
| LT6100HMS8#PBF | MS-8 | H | $2.11 | $1.48 | Yes | |
| LT6100HMS8#TRPBF | MS-8 | H | $1.54 | Yes | ||
| LT6100IDD#PBF | 3x3 DFN-8 | I | $1.94 | $1.36 | Yes | |
| LT6100IDD#TRPBF | 3x3 DFN-8 | I | $1.46 | Yes | ||
| LT6100IMS8#PBF | MS-8 | I | $1.94 | $1.36 | Yes | |
| LT6100IMS8#TRPBF | MS-8 | I | $1.42 | Yes | ||
| Buy Now • Request Samples | ||||||
Applications
- Battery Monitoring
- Fuse Monitoring
- Portable and Cellular Phones
- Portable Test/Measurement Systems
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Design Tools
LTspice
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LT6100
Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.
