參數(shù)資料
型號(hào)： TPIC8300IPWRQ1
廠商： TEXAS INSTRUMENTS INC
元件分類： 模擬信號(hào)調(diào)理
英文描述： SPECIALTY ANALOG CIRCUIT, PDSO16
封裝： PLASTIC, TSSOP-16
文件頁(yè)數(shù)： 44/47頁(yè)
文件大小： 546K
代理商： TPIC8300IPWRQ1
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
Copyright 2009, Texas Instruments Incorporated
Product Folder Link(s): TPIC83000-Q1
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