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參數(shù)資料
| 型號： | TLC2543QEP |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 12-BIT ANALOG-TO-DIGITAL CONVERTER WITH SERIAL CONTROL AND 11 ANALOG INPUTS |
| 中文描述： | 12位模擬數(shù)字轉換串行控制和11個模擬輸入 |
| 文件頁數(shù)： | 13/25頁 |
| 文件大?。?/td> | 364K |
| 代理商： | TLC2543QEP |
www.ti.com
Power Up and Initialization
After power up, CS must be taken from high to low to begin an I/O cycle. EOC is initially high, and the input data
register is set to all zeroes. The contents of the output data register are random, and the first conversion result
should be ignored. To initialize during operation, CS is taken high and is then returned low to begin the next I/O
cycle. The first conversion after the device has returned from the power-down state may not read accurately due
to internal device settling.
TLC2543-EP
12-BIT ANALOG-TO-DIGITAL CONVERTER
WITH SERIAL CONTROL AND 11 ANALOG INPUTS
SGLS125A–JULY 2002–REVISED NOVEMBER 2006
PRINCIPLES OF OPERATION (continued)
Table 1. Operational Terminology
Entire I/O CLOCK sequence that transfers address and control data into the data register and
clocks the digital result from the previous conversion from DATA OUT
The conversion cycle starts immediately after the current I/O cycle. The end of the current I/O
cycle is the last clock falling edge in the I/O CLOCK sequence. The current conversion result
is loaded into the output register when conversion is complete.
The current conversion result is serially shifted out on the next I/O cycle.
Conversion cycle just prior to the current I/O cycle
I/O period that follows the current conversion cycle
Current (N) I/O cycle
Current (N) conversion cycle
Current (N) conversion result
Previous (N – 1) conversion cycle
Next (N + 1) I/O cycle
Example: In the 12-bit mode, the result of the current conversion cycle is a 12-bit serial-data stream clocked out
during the next I/O cycle. The current I/O cycle must be exactly 12 bits long to maintain synchronization, even
when this corrupts the output data from the previous conversion. The current conversion is begun immediately
after the twelfth falling edge of the current I/O cycle.
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