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ACS764 Datasheet(PDF) 7 Page - Allegro MicroSystems |
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ACS764 Datasheet(HTML) 7 Page - Allegro MicroSystems |
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7 / 22 page  Fully Integrated, Hall-Effect Based Current Sensor IC with I2C Digital Output and Low-Resistance Current Conductor ACS764 7 Allegro MicroSystems, LLC 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com I2C INTERFACE CHARACTERISTICS* Valid at an ambient temperature range of –20°C to 125°C and VCC = 3.3 V; unless otherwise noted Characteristics Symbol Test Conditions Min. Typ. Max. Unit Bus Free Time Between Stop and Start tBUF 1.3 – – μs Hold Time Start Condition thdSTA 0.6 – – μs Setup Time for Repeated Start Condition tsuSTA 0.6 – – μs SCL Low Time tLOW 1.3 – – μs SCL High Time tHIGH 0.6 – – μs Data Setup Time tsuDAT 100 – – ns Data Hold Time thdDAT 0 – 900 ns Setup Time for Stop Condition tsuSTO 0.6 – – μs Logic Input Low Level (SDA, SCL pins) VIL −− 0.3×VCC V Logic Input High Level (SDA, SCL pins) VIH 0.7×VCC −− V Logic Input Current IIN VIN = 0 V to VCC −1 − 1 μA Output Voltage (SDA pin) VOL RPU = 1 kΩ, CB = 100 pF −− 0.2 ×VCC V Logic Input Rise Time (SDA, SCL pins) tr −− 300 ns Logic Input Fall time (SDA, SCL pins) tf −− 300 ns SDA Output Rise Time tr RPU = 1 kΩ, CB = 100 pF −− 300 ns SDA Output Fall Time tf RPU = 1 kΩ, CB = 100 pF −− 300 ns Clock Frequency (SCL pin) fCLK −− 400 kHz SDA and SCL Bus Pull-up Resistor RPU − 1 − kΩ Total Capacitive Load for Each of SDA and SCL Buses CB −− 100 pF *I2C interface characteristics are ensured by designed but are not factory tested. SDA SCL tsuSTA thdSTA tsuDAT thdDAT tsuSTO tBUF tLOW tr tf tr tf tHIGH I2C Interface Timing Diagram |
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