LT6106 36V Low Cost High Side Current Sense in a SOT-23 FEATURESDESCRIPTION n Gain Configurable with Two Resistors The LT®6106 is a versatile high side current sense ampli- n Low Offset Voltage: 250µV Maximum fier. Design flexibility is provided by the excellent device n Output Current: 1mA Maximum characteristics: 250µV maximum offset and 40nA maxi- n Supply Range: 2.7V to 36V, 44V Absolute Maximum mum input bias current. Gain for each device is set by two n Low Input Bias Current: 40nA Maximum resistors and allows for accuracy better than 1%. n PSRR: 106dB Minimum The LT6106 monitors current via the voltage across an n Low Supply Current: 65µA Typical, V+ = 12V external sense resistor (shunt resistor). Internal circuitry n Operating Temperature Range: –40°C to 125°C converts input voltage to output current, allowing for a n Low Profile (1mm) ThinSOT™ Package small sense signal on a high common mode voltage to n AEC-Q100 Qualified for Automotive Applications be translated into a ground referenced signal. The low DC APPLICATIONS offset allows for monitoring very small sense voltages. As a result, a small valued shunt resistor can be used, which n Current Shunt Measurement minimizes the power loss in the shunt. n Battery Monitoring The wide 2.7V to 44V input voltage range, high accuracy n Power Management and wide operating temperature range make the LT6106 n Motor Control ideal for automotive, industrial and power management n Lamp Monitoring applications. The very low power supply current of the n Overcurrent and Fault Detection LT6106 also makes it suitable for low power and battery operated applications. All registered trademarks and trademarks are the property of their respective owners. TYPICAL APPLICATION3V to 36V, 5A Current Sense with AV = 10Measurement Accuracy vs Load Current 3V TO 36V 0.6 LIMIT OVER TEMPERATURE 0.4 0.2 100Ω 0.02Ω 0 TYPICAL PART AT TA = 25°C +IN –IN –0.2 + – LOAD –0.4 V+ V– LIMIT OVER TEMPERATURE –0.6 –0.8 ACCURACY (% OF FULL SCALE) 5A FULL SCALE RIN = 100Ω –1.0 RSENSE = 0.02Ω ROUT = 1k AV = 10 V+ = 3V OUT V –1.2 LT6106 OUT 200mV/A 0 1 2 3 4 5 1k LOAD CURRENT (A) 6106 TA01b 6106 TA01a Rev. C Document Feedback For more information www.analog.com 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Typical Performance Characteristics Pin Functions Block Diagram Applications Information Package Description Revision History Typical Application Related Parts
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