LT6100 Precision, Gain Selectable High Side Current Sense Amplifier FEATURES DESCRIPTION n Input Offset Voltage: 300V (Max) The LT 6100 is a complete micropower, precision, high n Sense Inputs Up to 48V side current sense amplifier. The LT6100 monitors unidi- n 0.5% Gain Accuracy rectional currents via the voltage across an external sense n Pin Selectable Gain: 10, 12.5, 20, 25, 40, 50V/V resistor. Fixed gains of 10, 12.5, 20, 25, 40, 50V/V are n Separate Power Supply: 2.7V to 36V obtained by simply strapping or floating two gain select n Operating Current: 60A pins. Gain accuracy is better than 0.5% for all gains. n Sense Input Current (V Powered Down): 1nA CC The LT6100 sense inputs have a voltage range that extends n Reverse Battery Protected to 48V from 4.1V to 48V, and can withstand a differential voltage n Buffered Output of the full supply. This makes it possible to monitor the n Noise Filtering Input voltage across a MOSFET switch or a fuse. The part can n 40C to 125C Operating Temperature Range also withstand a reverse battery condition on the inputs. n Available in 8-Lead DFN and MSOP Packages Input offset is a low 300V. CMRR and PSRR are in ex- cess of 105dB, resulting in a wide dynamic range. A filter APPLICATIONS pin is provided to easily implement signal filtering with a n Battery Monitoring single capacitor. n Fuse Monitoring The LT6100 has a separate supply input, which operates n Portable and Cellular Phones from 2.7V to 36V and draws only 60A. When V is CC n Portable Test/Measurement Systems powered down, the sense pins are biased off. This pre- L, LT, LTC, LTM, Linear Technology, the Linear logo and Over-The-Top are registered vents loading of the monitored circuit, irrespective of the trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. sense voltage. The LT6100 is available in an 8-lead DFN and MSOP package. TYPICAL APPLICATION 0A to 33A High Side Current Monitor with 12kHz Frequency Rolloff Input Offset Voltage vs V Sense Input Voltage S 4.4V TO 48V 3V 1.5 V = 100mV SUPPLY SENSE 2 7 6 = 3V V CC 1.0 = 25C T A V A4 A2 LT6100 CC + 0.5 V 8 S V 0 OUT 5 R V = 2.5V SENSE OUT 3m I = 33A SENSE V 1 S 0.5 1.0 V EE FIL LOAD 6100 TA01a 4 3 220pF 1.5 CONFIGURED FOR GAIN = 25V/V 0 5 10 15 20 25 30 35 40 45 50 V SENSE INPUT VOLTAGE (V) S 6100 TA01b 6100fd 1 For more information www.linear.com/LT6100 INPUT OFFSET VOLTAGE (mV)LT6100 ABSOLUTE MAXIMUM RATINGS (Notes 1, 2) Differential Sense Voltage ...................................... 48V Specified Temperature Range (Note 5) + Total V , V to V ............................................... 48V LT6100C ................................................ 0C to 70C S S EE Total V Supply Voltage from V ......................... 36V LT6100I ..............................................40C to 85C CC EE Output Voltage ............................... (V ) to (V + 36V) LT6100H .......................................... 40C to 125C EE EE Output Short-Circuit Duration (Note 3) ........ Continuous Storage Temperature Range ........................................... Operating Temperature Range (Note 4) DFN .................................................... 65C to 125C LT6100C ............................................40C to 85C MSOP ................................................ 65C to 150C LT6100I ..............................................40C to 85C Lead Temperature (Soldering, 10 sec) LT6100H .......................................... 40C to 125C MSOP .............................................................. 300C PACKAGE/ORDER INFORMATION TOP VIEW + TOP VIEW V 1 8 V S S + V 1 8 V S S V 2 7 A4 CC V 2 7 A4 9 CC FIL 3 6 A2 FIL 3 6 A2 V 4 5 V EE OUT V 4 5 V EE OUT MS8 PACKAGE 8-LEAD PLASTIC MSOP DD PACKAGE T = 150C, = 250C/W 8-LEAD (3mm 3mm) PLASTIC DFN JMAX JA T = 125C, = 43C/W JMAX JA EXPOSED PAD (PIN 9) IS V , MUST BE SOLDERED TO PCB EE ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE LT6100CDD PBF LT6100CDD TRPBF LBMW 0C to 70C 8-Lead (3mm 3mm) Plastic DFN LT6100IDD PBF LT6100IDD TRPBF LBMW 40C to 85C 8-Lead (3mm 3mm) Plastic DFN LT6100HDD PBF LT6100HDD TRPBF LBMW 8-Lead (3mm 3mm) Plastic DFN 40C to 125C LT6100CMS8 PBF LT6100CMS8 TRPBF LTBMV 8-Lead Plastic MS8 0C to 70C LT6100IMS8 PBF LT6100IMS8 TRPBF LTBMV 8-Lead Plastic MS8 40C to 85C LT6100HMS8 PBF LT6100HMS8 TRPBF LTBMV 8-Lead Plastic MS8 40C to 125C Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.Consult LTC Marketing for information on nonstandard lead based finish parts. For more information on lead free part marking, go to: