FEATURES
12-bit ADC, 1us per channel conversion time 6 Analog Input Channels, CM range 0.5V to 27.5V 6 Temperature Measurements Inputs. On Chip Voltage Regulator Cell Balancing Interface Daisy Chain Interface 3 ppm Reference Low Quiescent Current High Input Impedance Serial Interface with Alert Function 1 SPI interface for up to 300 channels On Chip Registers for Channel Sequencing VDD Operating Range 7.5V to 30V Temperature Range -40 oC to 105oC 48 lead LQFP and LFCSP Packages Lithium Ion Battery Monitoring System AD7280 FUNCTIONAL BLOCK DIAGRAM V DD SCLKhi SDINhi SDOUThi ALERThi CShi PDhi CNVSThi CB1 CB6 AD7280 Vin(6) Vin(5) Vin(4) Vin(3) Vin(2) Vin(1) Vin(0) MUX + - DAIS Y CHAIN INTER FACE CEL L BALANCING INTER FACE REGUL ATOR VREG DGND DVCC + - 12 BIT ADC AVCC VDRIVE VT(6) VT(5) VT(4) VT(3) VT(2) VT(1) VT TERM CLOCK CONTRO L LOGIC & SELF TEST SCLK SDIN SDO UT ALERT CS PD CNVST MASTER VREF CREF REFGND 2.5V REF LIMIT REG SQN LOGIC DATA MEMO RY SPI INTER FACE VSS AGND APPLICATIONS
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