A Product Line of Diodes Incorporated ZXCT1082/83/84/85/86/87 PRECISION HIGH VOLTAGE HIGH-SIDE CURRENT MONITORS Description Pin Assignments The ZXCT1082 and ZXCT1083 are high side unipolar current sense monitors. These devices eliminate the need to V OUT 1 5 CC disrupt the ground plane when sensing a load current. The ZXCT1082/1084/1086 have 60V maximum operating GND 2 voltage and ZXCT1083/1085/1087 have 40V maximum operating voltage. S+34 S- The wide common-mode input voltage range and low quiescent currents coupled with SOT25 packages make them suitable for a range of applications including automotive and systems operating from industrial 24-28V Typical Application Circuits rails. R SENSE Their quiescent current is only 0.6A thereby minimizing V V SUPPLY LOAD current sensing error. S+ S- The ZXCT1082 and ZXCT1083 use three external ZXCT1084/1085 transconductance/gain setting resistors which increase versatility by permitting wide gain ranges and optimization of ZXCT1086/1087 V CC Load bandwidths. OUT GND The ZXCT1084/5/6/7 are fixed gain voltage output counterparts of the ZXCT1082/3. ZXCT1084/85: V = 25 x V OUT SENSE Features ZXCT1086/87: V = 50 x V OUT SENSE Wide supply and common-mode voltage range o 2.7V to 60V ZXCT1082/84/86 R SENSE o 2.7V to 40V ZXCT1083/85/87 V V Independent supply and input common-mode voltage SUPPLY LOAD Low quiescent current (0.6A). R AEC-Q100 Grade 1 qualified GT R GT Extended industrial temperate range -40 to 125C S+ S- Package SOT25 V ZXCT1082/1083 CC Load Applications OUT GND Automotive current measurement R G Industrial applications current measurement Battery management Over current monitor ZXCT1082/83: V = V * R OUT SENSE G Power Management R Current sources GT 1 of 13 June 2011 ZXCT1082/83/84/85/86/87 Diodes Incorporated www.diodes.com Document number: DS32162 Rev. 2 - 2 A Product Line of Diodes Incorporated ZXCT1082/83/84/85/86/87 Pin Description Description PIN Name Common ZXCT1082/3 ZXCT1084/5/6/7 1 OUT Output pin. Current output. Voltage output 2 GND Ground pin. This is the positive input of the An external resistor, R , should GT Should be directly connected to current monitor. It has a wide be connected from S+ to the input 3 S+ common-mode input range. The the input side (V ) of the SUPPLY side (V ) of the sense SUPPLY current through this pin varies with sense resistor. resistor differential sense voltage. Should be directly connected to This is the negative input of the An external resistor, R , should GT 4 S- current monitor. It has a wide be connected from S- to the load the load side (V ) of the sense LOAD common-mode input range. resistor. side (V ) of the sense resistor. LOAD 5 This is the analogue supply and provides power to internal circuitry. V CC Absolute Maximum Ratings Parameter Rating Unit Voltage on S- and S+ ZXCT1082, ZXCT1084, ZXCT1086 -0.3 to 65 V ZXCT1083, ZXCT1085, ZXCT1087 -0.3 to 45 Voltage on V CC ZXCT1082, ZXCT1084, ZXCT1086 -0.3 to 65 V ZXCT1083, ZXCT1085, ZXCT1087 -0.3 to 45 Voltage on OUT -0.3 to V V S- Differential Input Voltage, V - V 800 mV S+ S- () Input current into S+ or S- 12 mA Storage Temperature -55 to 150 C Maximum Junction Temperature 150 C 300 at T = 25C A Package Power Dissipation mW (De-rate to zero at 150C) ESD Rating Human Body Model 2 kV Machine Model 200 V Operation above the absolute maximum rating may cause device failure. Operation at the absolute maximum ratings, for extended periods, may reduce device reliability. () The differential input voltage limit, V - V may be exceeded provided that the input current limit into S+ or S- is not exceeded S+ S- Recommended Operating Conditions Symbol Parameter Min Max Units ZXCT1083/1085/1087 Common-Mode Input Range 2.7 40 V V IN ZXCT1082/1084/1086 Common-Mode Input Range 2.7 60 ZXCT1083/1085/1087 Supply Voltage Range 2.7 40 V V CC ZXCT1082/1084/1086 Supply Voltage Range 2.7 60 V Differential Sense Input Voltage Range 0 0.5 V SENSE V Output Voltage Range 0 V -1 V OUT S- T Ambient Temperature Range -40 125 C A 2 of 13 June 2011 ZXCT1082/83/84/85/86/87 Diodes Incorporated www.diodes.com Document number: DS32162 Rev. 2 - 2