LT6109 - High Side Current Sense Amplifier with Reference and Comparators
Features
- Current Sense Amplifier
– Fast Step Response: 500ns
– Low Offset Voltage: 350μV Maximum
– Low Input Bias Current: 300nA Maximum - Internal 400mV Precision Reference
- Internal Latching Comparators with Reset
– Fast Response Time: 700ns
– Total Threshold Error: ±2% Maximum
– Two Comparator Polarity Options - Wide Supply Range: 2.7V to 60V
- Supply Current: 550μA
- Low Shutdown Current: 5μA
- Specified for –40°C to 125°C Temperature Range
- Available in 10-Lead MSOP Package
Typical Application
Description
The LT®6109 is a complete high side current sense device that incorporates a precision current sense amplifier, an integrated voltage reference and two comparators. Two versions of the LT6109 are available. The LT6109-1 has the comparators connected in opposing polarity and the LT6109-2 has the comparators connected in the same polarity. In addition, the current sense amplifier and comparator outputs are directly accessible. The amplifier gain and comparator trip points are configured by external resistors. The open-drain comparator outputs allows for easy interface to other system components.
The combined system propagation delay of the LT6109 is typically only 1.4μs, allowing for quick reaction to overcurrent and undercurrent conditions. The 1MHz bandwidth allows the LT6109 to be used for error detection in critical applications such as motor control. The high threshold accuracy of the comparators, combined with the ability to latch both comparators, ensures the LT6109 can capture high speed events.
The LT6109 is fully specified for operation from –40°C to 125°C, making it suitable for industrial and automotive applications. The LT6109 is available in a small 10-lead MSOP.
Packaging
For complete and up to date package information and drawings, please refer to our packaging page
MS-10
Order Info
- Part numbers ending in PBF are lead free. Please contact LTC marketing for information on lead based finish parts.
- 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 | Pins | Temp | Price (1-99) | Price (1k)* | RoHS Data |
|---|---|---|---|---|---|---|
| LT6109HMS-1#PBF | MSOP | 10 | H | $2.91 | $2.07 | View |
| LT6109HMS-1#TRPBF | MSOP | 10 | H | $2.13 | View | |
| LT6109HMS-2#PBF | MSOP | 10 | H | $2.91 | $2.07 | View |
| LT6109HMS-2#TRPBF | MSOP | 10 | H | $2.13 | View | |
| LT6109IMS-1#PBF | MSOP | 10 | I | $2.59 | $1.84 | View |
| LT6109IMS-1#TRPBF | MSOP | 10 | I | $1.90 | View | |
| LT6109IMS-2#PBF | MSOP | 10 | I | $2.59 | $1.84 | View |
| LT6109IMS-2#TRPBF | MSOP | 10 | I | $1.90 | View | |
| Buy Now • Request Samples | ||||||
Demo Boards
Linear Technology demo boards are offered free of charge to qualified customers. Contact your local sales office or distributor to request 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 |
|---|---|---|---|
| DC1659A-A | LT6109-1 | High Side Current Sense with Reference and Comparators | $50.00 | |
| DC1659A-B | LT6109-2 | High Side Current Sense with Reference and Comparators | $50.00 | |
| Buy Now | |||
Applications
- Overcurrent, Undercurrent and Fault Detection
- Current Shunt Measurement
- Battery Monitoring
- Motor Control
- Automotive Monitoring and Control
- Remote Sensing
- Industrial Control
Simulate
LTspice IV is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. To download LTspice IV and other FREE simulation tools, please visit our Design Simulation page.
Related models available in LTspice IV
LT6109-1
LT6109-2
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.