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Application Note
Design Note
Reliability Data
Product Selector Card
LT Journal
- October 2007 - Measure Microamps to Amps or Reduce Power Dissipation by 99%, You Decide!
- September 2009 - 3mm × 3mm, 16-Bit ADC Brings Accurate, Precise High Side Current Sensing to Tight Spaces
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Features
- Supply Range:
4V to 60V, 70V Maximum (LTC6102)
5V to 100V, 105V Maximum (LTC6102HV) - ±10μV Input Offset Maximum
- ±50nV/°C Input Offset Drift Maximum
- Fast Response: 1μs Step Response
- Gain Configurable with Two Resistors
- Low Input Bias Current: 3nA Maximum
- PSRR 130dB Minimum
- Output Currents up to 1mA
- Operating Temperature Range: –40°C to 125°C
- Disable Mode (LTC6102-1 Only): 1μA Maximum
- Available in 8-Lead MSOP and 3mm × 3mm DFN Packages
Typical Application
Description
The LTC®6102/LTC6102HV are versatile, high voltage, highside current sense amplifiers. Their high supply voltage rating allows their use in many high side applications, while the low drift and offset ensure accuracy across a wide range of operating conditions. The LTC6102-1 is a version of the LTC6102 that includes a low power disable mode to conserve system standby power.
The LTC6102/LTC6102HV monitor current via the voltage across an external sense resistor (shunt resistor). Internal circuitry converts input voltage to output current, allowing a small sense signal on a large common mode voltage to be translated to a ground-referred signal. Low DC offset allows the use of very low shunt resistor values and large gain-setting resistors. As a result, power loss in the shunt is reduced.
The wide operating supply and high accuracy make the LTC6102 ideal for a large array of applications, from automotive, to industrial and power management. A maximum input sense voltage of 2V allows a wide range of currents and voltages to be monitored. Fast response makes the LTC6102 the perfect choice for load current warnings and shutoff protection control.
All versions of the LTC6102 are available in 8-lead MSOP and 3mm × 3mm DFN packages.
3x3 DFN-8,MS-8
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) |
Price (1k)* |
|---|---|---|---|---|---|
| LTC6102CDD#PBF | DFN | 8 | C | $2.44 | $1.72 |
| LTC6102CDD#TRPBF | DFN | 8 | C | $1.78 | |
| LTC6102CDD-1#PBF | DFN | 8 | C | $2.54 | $1.82 |
| LTC6102CDD-1#TRPBF | DFN | 8 | C | $2.60 | $1.88 |
| LTC6102CMS8#PBF | MSOP | 8 | C | $2.44 | $1.72 |
| LTC6102CMS8#TRPBF | MSOP | 8 | C | $1.78 | |
| LTC6102CMS8-1#PBF | MSOP | 8 | C | $2.54 | $1.82 |
| LTC6102CMS8-1#TRPBF | MSOP | 8 | C | $2.60 | $1.88 |
| LTC6102HDD#PBF | DFN | 8 | H | $3.24 | $2.27 |
| LTC6102HDD#TRPBF | DFN | 8 | H | $2.33 | |
| LTC6102HDD-1#PBF | DFN | 8 | H | $3.30 | $2.37 |
| LTC6102HDD-1#TRPBF | DFN | 8 | H | $3.36 | $2.43 |
| LTC6102HMS8#PBF | MSOP | 8 | H | $3.24 | $2.27 |
| LTC6102HMS8#TRPBF | MSOP | 8 | H | $2.33 | |
| LTC6102HMS8-1#PBF | MSOP | 8 | H | $3.30 | $2.37 |
| LTC6102HMS8-1#TRPBF | MSOP | 8 | H | $3.36 | $2.43 |
| LTC6102HVCDD#PBF | DFN | 8 | C | $2.93 | $2.06 |
| LTC6102HVCDD#TRPBF | DFN | 8 | C | $2.12 | |
| LTC6102HVCMS8#PBF | MSOP | 8 | C | $2.93 | $2.06 |
| LTC6102HVCMS8#TRPBF | MSOP | 8 | C | $2.12 | |
| LTC6102HVHDD#PBF | DFN | 8 | H | $3.89 | $2.72 |
| LTC6102HVHDD#TRPBF | DFN | 8 | H | $2.78 | |
| LTC6102HVHMS8#PBF | MSOP | 8 | H | $3.89 | $2.72 |
| LTC6102HVHMS8#TRPBF | MSOP | 8 | H | $2.78 | |
| LTC6102HVIDD#PBF | DFN | 8 | I | $3.41 | $2.38 |
| LTC6102HVIDD#TRPBF | DFN | 8 | I | $2.44 | |
| LTC6102HVIMS8#PBF | MSOP | 8 | I | $3.41 | $2.38 |
| LTC6102HVIMS8#TRPBF | MSOP | 8 | I | $2.44 | |
| LTC6102IDD#PBF | DFN | 8 | I | $2.83 | $1.98 |
| LTC6102IDD#TRPBF | DFN | 8 | I | $2.04 | |
| LTC6102IDD-1#PBF | DFN | 8 | I | $2.90 | $2.08 |
| LTC6102IDD-1#TRPBF | DFN | 8 | I | $2.96 | $2.14 |
| LTC6102IMS8#PBF | MSOP | 8 | I | $2.83 | $1.98 |
| LTC6102IMS8#TRPBF | MSOP | 8 | I | $2.04 | |
| LTC6102IMS8-1#PBF | MSOP | 8 | I | $2.90 | $2.08 |
| LTC6102IMS8-1#TRPBF | MSOP | 8 | I | $2.96 | $2.14 |
| LTC6102HMS8#TR | MSOP | 8 | H | $4.66 | |
| LTC6102HMS8-1 | MSOP | 8 | H | $6.60 | $4.74 |
| LTC6102HVHMS8 | MSOP | 8 | H | $7.78 | $5.44 |
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 |
|---|---|---|---|
| DC1113A | LTC6102 Current Sense Demo Board | $50.00 | |
| DC1536A | LTC6102-1 Current Sense Demo Board with Enable Feature | $50.00 | |
| DC907A-B | LTC6102, LT6100, LT1787, LTC2054, and LTC2439-1 (Requires DC590B) | Demo Board | $150.00 |
Companion Boards
| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC590B | Isolated USB Serial Controller for Linear Technology QuikEval-Compatible Demo Boards | $50.00 |