LT1787 - Precision, High Side Current Sense Amplifiers
Features
- Input Offset Voltage: 75µV (Max)
- 60V Supply Operation (LT1787HV)
- 12-Bit Dynamic Range
- Operating Current: 60µA
- User-Selectable External Sense Resistor
- Bidirectional High Side Current Sensing
- Unidirectional or Bidirectional Output
- Input Noise Filtering
- Available in 8-Lead SO and MSOP Packages
- –40°C to 125°C Operating Temperature Range
Typical Application
Description
The LT1787 is a complete micropower precision high side current sense amplifier. The LT1787 monitors bidirectional currents via the voltage across an external sense resistor. A current or voltage output indicates the direction and magnitude of the sense current. The LT1787 delivers greater than a 12-bit dynamic range with ultralow 40µV input offset voltage compared to a typical 250mV full-scale input voltage. A fixed gain of 8 is set by onboard precision resistors. Input signal filtering is easily implemented with a capacitor between the FIL– and FIL+ pins. The LT1787HV operates from 2.5V to 60V total supply voltage and the LT1787 operates from 2.5V to 36V total supply voltage. Both versions have a PSRR in excess of 120dB. The LT1787/LT1787HV draw only 60µA and are available in 8-lead SO and MSOP packages.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 |
|---|---|---|---|---|---|
| LT1787CMS8#PBF | MS-8 | MS8 | C | 05-08-1660 | Yes |
| LT1787CMS8#TRPBF | MS-8 | MS8 | C | 05-08-1660 | Yes |
| LT1787CS8#PBF | SO-8 | S8 | C | 05-08-1610 (S8) | Yes |
| LT1787CS8#TRPBF | SO-8 | S8 | C | 05-08-1610 (S8) | Yes |
| LT1787HS8#PBF | SO-8 | S8 | H | 05-08-1610 (S8) | Yes |
| LT1787HS8#TRPBF | SO-8 | S8 | H | 05-08-1610 (S8) | Yes |
| LT1787HVCMS8#PBF | MS-8 | MS8 | C | 05-08-1660 | Yes |
| LT1787HVCMS8#TRPBF | MS-8 | MS8 | C | 05-08-1660 | Yes |
| LT1787HVCS8#PBF | SO-8 | S8 | C | 05-08-1610 (S8) | Yes |
| LT1787HVCS8#TRPBF | SO-8 | S8 | C | 05-08-1610 (S8) | Yes |
| LT1787HVHS8#PBF | SO-8 | S8 | H | 05-08-1610 (S8) | Yes |
| LT1787HVHS8#TRPBF | SO-8 | S8 | H | 05-08-1610 (S8) | Yes |
| LT1787HVIMS8#PBF | MS-8 | MS8 | I | 05-08-1660 | Yes |
| LT1787HVIMS8#TRPBF | MS-8 | MS8 | I | 05-08-1660 | Yes |
| LT1787HVIS8#PBF | SO-8 | S8 | I | 05-08-1610 (S8) | Yes |
| LT1787HVIS8#TRPBF | SO-8 | S8 | I | 05-08-1610 (S8) | Yes |
| LT1787IMS8#PBF | MS-8 | MS8 | I | 05-08-1660 | Yes |
| LT1787IMS8#TRPBF | MS-8 | MS8 | I | 05-08-1660 | Yes |
| LT1787IS8#PBF | SO-8 | S8 | I | 05-08-1610 (S8) | Yes |
| LT1787IS8#TRPBF | SO-8 | S8 | I | 05-08-1610 (S8) | 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 | |
|---|---|---|---|---|---|---|
| LT1787CMS8#PBF | MS-8 | C | $2.60 | $2.25 | Yes | |
| LT1787CMS8#TRPBF | MS-8 | C | $2.31 | Yes | ||
| LT1787CS8#PBF | SO-8 | C | $2.40 | $2.05 | Yes | |
| LT1787CS8#TRPBF | SO-8 | C | $2.11 | Yes | ||
| LT1787HS8#PBF | SO-8 | H | $3.20 | $2.70 | Yes | |
| LT1787HS8#TRPBF | SO-8 | H | $2.75 | Yes | ||
| LT1787HVCMS8#PBF | MS-8 | C | $3.55 | $3.05 | Yes | |
| LT1787HVCMS8#TRPBF | MS-8 | C | $3.11 | Yes | ||
| LT1787HVCS8#PBF | SO-8 | C | $3.35 | $2.90 | Yes | |
| LT1787HVCS8#TRPBF | SO-8 | C | $2.96 | Yes | ||
| LT1787HVHS8#PBF | SO-8 | H | $4.10 | $3.60 | Yes | |
| LT1787HVHS8#TRPBF | SO-8 | H | $3.65 | Yes | ||
| LT1787HVIMS8#PBF | MS-8 | I | $4.45 | $3.85 | Yes | |
| LT1787HVIMS8#TRPBF | MS-8 | I | $3.91 | Yes | ||
| LT1787HVIS8#PBF | SO-8 | I | $3.95 | $3.45 | Yes | |
| LT1787HVIS8#TRPBF | SO-8 | I | $3.51 | Yes | ||
| LT1787IMS8#PBF | MS-8 | I | $3.15 | $2.75 | Yes | |
| LT1787IMS8#TRPBF | MS-8 | I | $2.81 | Yes | ||
| LT1787IS8#PBF | SO-8 | I | $2.95 | $2.55 | Yes | |
| LT1787IS8#TRPBF | SO-8 | I | $2.61 | 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 |
|---|---|---|---|
| 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 | |||
Applications
- Battery Monitoring
- Power Monitoring
- Portable Phones
- Cellular Phones
- Portable Test/Measurement Systems
- Battery-Operated Systems
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Design Tools
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LT1787
Technical Support
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- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.
