Data Sheet ACPL-C87AT/ACPL-C87BT Automotive High Precision DC Voltage Isolation Sensor Description Features The Broadcom ACPL-C87AT/C87BT isolation sensors Unity gain utilize superior optical coupling technology, with sigma-delta 0.5% (ACPL-C87BT) and 1% (ACPL-C87AT) gain (-) analog-to-digital converter, chopper stabilized tolerance 25C amplifiers, and a fully differential circuit topology to provide 0.3 mV Input offset voltage unequaled isolation-mode noise rejection, low offset, high 0.05% non linearity gain accuracy and stability. 25 ppm/C gain drift vs. temperature 100 kHz bandwidth ACPL-C87AT (1% gain tolerance) and ACPL-C87BT 0 to 2V nominal input range (0.5% gain tolerance) are designed for high precision DC Qualified to AEC-Q100 Grade 1 test guidelines voltage sensing in electronic motor drives, DC/DC and Operating temperature: 40C to +125C AC/DC converter and battery monitoring system. The Shutdown feature (active high) ACPL-C87AT/C87BT features high input impedance and operate with full span of analog input voltage up to 2.46V. 15 kV/s common-mode rejection at V = 1 kV CM The shutdown feature provides power saving and can be Working voltage, V = 1414 V IORM peak controlled from external source, such as microprocessor. Compact, surface mount stretched SO8 package Worldwide safety approval: The high common-mode transient immunity (15 kV/s) of UL 1577 (5000 V /1 minute) RMS the ACPL-C87AT/C87BT maintains the precision and CSA stability needed to accurately monitor DC rail voltage in high IEC/EN/DIN EN 60747-5-5 noise motor control environments. This galvanic safe isolation solution is delivered in a compact, surface mount Applications stretched SO-8 (SSO-8) package that meets worldwide Automotive BMS battery pack voltage sensing regulatory safety standards. Automotive DC/DC converter voltage sensing 2 Broadcom R Coupler isolation products provide the Automotive motor inverter DC bus voltage sensing reinforced insulation and reliability needed for critical Automotive AC/DC (charger) DC output voltage automotive and high temperature industrial applications. sensing Isolation interface for temperature sensing General-purpose voltage sensing and monitoring CAUTION Take normal static precautions in handling and assembly of this component to prevent damage and/or degradation which may be induced by ESD. Broadcom AV02-3564EN October 29, 2018ACPL-C87AT/ACPL-C87BT Data Sheet Automotive High Precision DC Voltage Isolation Sensor Functional Diagram Figure 1: Functional Diagram V V DD1 DD2 8 1 V 2 7 V IN OUT+ 0.1 P F 0.1 P F SHDN 3 6 V OUT- 5 4 GND1 SHIELD GND2 A 0.1-F bypass capacitor must be connected between pin 1 and pin 4, and pin 5 and pin 8 as shown. Figure 2: Functional Diagram 2 V V DD1 DD2 V IN V = V V OUT OUT+ OUT- V 0 2 V V OUT+ IN 0 2 V V OUT- SHDN Isolation GND1 GND2 Figure 3: Typical Voltage Sensing Circuit 5 V 15 V V+ MEV1S1505DC 5 V IN OUT Gate Driver 1 nF R1 M 0.1 P F 20 k: 39 : Gate 0.1 P F R4 20 k: Driver R5 20 k: V OUT R2 10 nF V- 1 nF 20 k: ACPL-C87AT/BT Broadcom AV02-3564EN 2