ZXCT1051E5TA Diodes Incorporated

ZXCT1051 Precision wide input range current monitor Description The ZXCT1051 is a wide input range current The ZXCT1051 provides a fixed gain of 10 monitor, which operates over a range of input thereby removing the need for an additional voltages from ground up to V -2V. As a result resistor. CC the ZXCT1051 can be used on the high or low side of the load. The very low offset voltage enables a typical accuracy of 1% for sense voltages of only 30mV, giving better tolerances for small sense resistors necessary at higher currents. Features Applications Accurate down to end current sensing Power supply Output voltage scaling x10 DC motor and solenoid control 0 to V -2V sense input range Battery management CC 2.7 to 20V supply range Over current monitor 50 A quiescent current Power management 1% typical accuracy Short circuit detection SOT23-5 package Pin connections Typical application circuit V - R SENSE SENSE V + SENSE V V - CC SENSE V - V + SENSE SENSE GND V CC ZXCT1051 V V + OUT SENSE V OUT GND V OUT Ordering information Order code Package Partmark Reel size Tape width Quantity (inches) (mm) per reel ZXCT1051E5TA SOT23-5 1051 7 8 3,000 Issue 2 - November 2006 1 www.zetex.com Zetex Semiconductors plc 2006ZXCT1051 Absolute maximum ratings V max. 20V CC Voltage on V - and V + -0.6 to V SENSE SENSE CC Voltage on all other pins -0.6V and V +0.6V CC V (V +) - (V -) 500mV SENSE SENSE SENSE Operating temperature, T -40 to 125C amb Storage temperature -55 to 150C Maximum junction temperature 150C Package power dissipation 300mW at T = 25C (de-rate to zero at 150C) amb Operation above the absolute maximum rating may cause device failure. Operation at the absolute maximum ratings, for extended periods, may reduce device reliability. Recommended operating conditions Parameter Min. Max. Units V Common-mode sense input range 0 V -2 V SENSE+ CC V Supply voltage range 2.7 20 V CC V Differential sense input voltage range 0 0.3 V SENSE V Output voltage range 0 V - 2 V OUT CC T Ambient temperature range -40 125 C amb Pin function table Pin Name Description 1V This is the analog supply and provides power to internal circuitry CC 2 GND Ground pin 3 OUT Output voltage pin. 4V + This is the positive input of the current monitor and has an input range from SENSE 0V up to V 2V. CC 5V - This is the negative input of the current monitor and has an input range SENSE from 0V up to V 2V. The current through this pin varies with differential CC sense voltage. Issue 2 - November 2006 2 www.zetex.com Zetex Semiconductors plc 2006