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參數(shù)資料
型號(hào): TLC2543MDBREP
廠商: TEXAS INSTRUMENTS INC
元件分類: ADC
英文描述: 11-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO20
封裝: GREEN, PLASTIC, SSOP-20
文件頁數(shù): 6/28頁
文件大小: 524K
代理商: TLC2543MDBREP
www.ti.com
Data Input
Data Input Address Bits
12-BIT ANALOG-TO-DIGITAL CONVERTER
WITH SERIAL CONTROL AND 11 ANALOG INPUTS
SGLS125A – JULY 2002 – REVISED NOVEMBER 2006
The data input is internally connected to an 8-bit serial-input address and control register. The register defines
the operation of the converter and the output data length. The host provides the data word with the MSB first.
Each data bit is clocked in on the rising edge of the I/O CLOCK sequence (see Table 2 for the data
input-register format).
Table 2. Input-Register Format
INPUT DATA BYTE
ADDRESS BITS
L1
L0
LSBF
BIP
FUNCTION SELECT
D7
D0
D6
D5
D4
D3
D2
D1
(MSB)
(LSB)
Select input channel
AIN0
0
AIN1
0
1
AIN2
0
1
0
AIN3
0
1
AIN4
0
1
0
AIN5
0
1
0
1
AIN6
0
1
0
AIN7
0
1
AIN8
1
0
AIN9
1
0
1
AIN10
1
0
1
0
Select test voltage
(Vref+ – Vref–)/2
1
0
1
Vref–
1
0
Vref+
1
0
1
Software power down
1
0
Output data length
8 bits
0
1
12 bits
X(1)
0
16 bits
1
Output data format
MSB first
0
LSB first (LSBF)
1
Unipolar (binary)
0
Bipolar (BIP) 2s complement
1
(1)
The four MSBs (D7–D4) of the data register address one of the 11 input channels, a reference-test voltage, or the power-down mode.
The address bits affect the current conversion, which is the conversion that immediately follows the current I/O cycle. The reference
voltage is nominally equal to Vref+– Vref–.
The four MSBs (D7–D4) of the data register address 1 of the 11 input channels, a reference-test voltage, or the
power-down mode. The address bits affect the current conversion, which is the conversion that immediately
follows the current I/O cycle. The reference voltage is nominally equal to Vref+– Vref–.
14
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