LTC6103 Dual High Voltage, High Side Current Sense Amplifi er FEATURESDESCRIPTION ■ Two Independent Current Sense Amplifi ers The LTC®6103 is a versatile, high voltage, high side, dual ■ Wide Supply Range: 4V to 60V, 70V Absolute current sense amplifi er. The two internal amplifi ers are Maximum independent except that they share the same V– terminal. ■ Low Offset Voltage: 450µV Maximum Design fl exibility is provided by the excellent device char- ■ Fast Response: 1µs Response Time acteristics: 450µV maximum offset, and only 275µA of ■ Gain Confi gurable with External Resistors current consumption (typical at 12V) for each amplifi er. ■ Low Input Bias Current: 170nA Maximum The LTC6103 operates on supplies from 4V to 60V. ■ PSRR: 110dB Minimum (6V to 60V) The LTC6103 monitors current via the voltage across an ■ Output Current: 1mA Maximum external sense resistor (shunt resistor). Internal circuitry ■ Low Supply Current: 275µA per Amplifi er, VS = 12V converts input voltage to output current, allowing for a ■ Specifi ed for –40°C to 125°C Temperature Range small sense signal on a high common mode voltage to be ■ Available in an 8-lead MSOP Package translated into a ground referenced signal. Low DC offset al- APPLICATIONS lows the use of a small shunt resistor and large gain-setting resistors. As a result, power loss in the shunt is minimal. ■ Current Shunt Measurement The wide operating supply range and high accuracy make ■ Battery Monitoring the LTC6103 ideal for an extensive variety of applications ■ Remote Sensing from automotive to industrial and power management. ■ Power Management The fast response makes the LTC6103 the perfect choice ■ High Voltage Level Translator for load current warnings and shutoff protection control. With very low supply current, the LTC6103 is suitable for power sensitive applications. The LTC6103 is available in an 8-lead MSOP package. , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATIONTwo 16-Bit Current Sense Channels Connected Directly to the LTC2436-1 ADC V + + A VB Step Response VSENSE VSENSE ILOAD – + + – ILOAD V – SENSE ∆V – SENSE = 100mV LOAD R R LOAD IN IN 100Ω 100Ω 5.5V 8 7 6 5 –INA –INB +INB 5V 1 5V +INA µF + – – + V V 2 1 SA SB IOUT = 100µA 6 T CH1 A = 25°C 13 V+ = 12V 7 12 R OUTA V– OUTB IN = 100Ω LTC6103 4 LTC2436-1 TO µP VOUT R 1 4 2 11 0.5V OUT = 5k IOUT = 0µA V + SENSE = V+ 5 0V CH0 500ns/DIV 6103 TA01b ROUT ROUT 3,8,9,10,14,15,16 4.99k 4.99k 6103 TA01a 6103f 1
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