TLC2543-EP Datasheet, PDF (14/25 Pages) Texas Instruments – 12-BIT ANALOG-TO-DIGITAL CONVERTER WITH SERIAL CONTROL AND 11 ANALOG INPUTS

TLC2543-EP
12-BIT ANALOG-TO-DIGITAL CONVERTER
WITH SERIAL CONTROL AND 11 ANALOG INPUTS
SGLS125A – JULY 2002 – REVISED NOVEMBER 2006
www.ti.com
Data Input
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
FUNCTION SELECT
Select input channel
AIN0
AIN1
AIN2
AIN3
AIN4
AIN5
AIN6
AIN7
AIN8
AIN9
AIN10
Select test voltage
(V_ref+ – V_ref–)/2
V_ref–
V_ref+
Software power down
Output data length
8 bits
12 bits
16 bits
Output data format
MSB first
LSB first (LSBF)
Unipolar (binary)
Bipolar (BIP) 2s complement
D7
(MSB)
ADDRESS BITS
D6
D5
0
0
0
0
0
0
0
0
1
0
0
1
0
1
0
0
1
0
0
1
1
0
1
1
1
0
0
1
0
0
1
0
1
1
0
1
1
1
0
1
1
0
1
1
1
INPUT DATA BYTE
L1
L0
D4
D3
D2
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
0
1
X ⁽¹⁾
0
1
1
LSBF
D1
BIP
D0
(LSB)
0
1
0
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 V_ref+– V_ref–.
Data Input Address Bits
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 V_ref+– V_ref–.
14
Submit Documentation Feedback