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TPIC83000IPWRQ1 Datasheet(PDF) 6 Page - Texas Instruments |
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TPIC83000IPWRQ1 Datasheet(HTML) 6 Page - Texas Instruments |
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6 / 44 page  TPIC83000-Q1 SLDS171 – NOVEMBER 2009 www.ti.com DETAILED FUNCTIONAL DESCRIPTION Pre-Amplifier (Front End) Due to initial large offset in the pressure sensor output, the analog front end has an offset correction as needed. Fault Detection Sensor inputs SIP, SIN The following faults are detected and a fault bit set in a register. The minimum fault detection filter time is 5 ms. There are 1- μA pulldown current source on the SIP and SIN terminals. Fault detection capabilities of this device are for both SIP and SIN sensor inputs. The following type of faults are reported and sent to the DIAG bits. • Shorts to Vcc • Shorts to Gnd • Open piezo-resistive or strain gauge (i.e., open-circuit between SIP and SIN inputs) ADC The ADC is a 14-bit with resolution of ±3 LSB (10 bit). Digital I/O • I/O data transfer via DI/DO pins. • Refer to data format communications between microprocessor to IC: Mode selection (microprocessor → IC) chart. • DI/DO interface become active only when specified data format and protocol are used. • Start bit is used to initiate the communication: DI/DO repeats Rx-Tx-Rx-Tx, to realize one pin Tx-Rx communication. When sensor, temperature, diagnostics, and trimming data are requested, DI/DO remain in Rx mode until all frames are sent. • DI/DO output current capability is 5 mA at low level. Memory • EEPROM : Read/Write cycle is less than 25 times • Data retention: 15 years at 90°C • Data fault detection (CRC8) • Fault write/erase prevention EEROM Write • Generate programming voltage after receiving the write RQ. • Output Diag during the write • EEROM write sequence 1. Send data to appropriate bank or field 2. Send WE = 1 (a) Calculate new CRC (b) Set charge pump on (c) Reload all registers from EEPROM (d) Check CRC value 3. Read Diag register to confirm PROG_OK = 1 4. Send WE = 0 ( ≥ 15 ms must elapse for write sequence to complete before microprocessor can disable EEPROM write) 6 Submit Documentation Feedback Copyright © 2009, Texas Instruments Incorporated Product Folder Link(s): TPIC83000-Q1 |
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