Datasheet

ADS7830
SBAS302C –DECEMBER 2003–REVISED OCTOBER 2012 www.ti.com
Table 2. Channel Selection Control Addressed by Command BYTE
CHANNEL SELECTION CONTROL
SD C2 C1 C0 CH0 CH1 CH2 CH3 CH4 CH5 CH6 CH7 COM
0 0 0 0 +IN –IN — — — — — — —
0 0 0 1 — — +IN –IN — — — — —
0 0 1 0 — — — — +IN –IN — — —
0 0 1 1 — — — — — — +IN –IN —
0 1 0 0 –IN +IN — — — — — — —
0 1 0 1 — — –IN +IN — — — — —
0 1 1 0 — — — — –IN +IN — — —
0 1 1 1 — — — — — — –IN +IN —
1 0 0 0 +IN — — — — — — — –IN
1 0 0 1 — — +IN — — — — — –IN
1 0 1 0 — — — — +IN — — — –IN
1 0 1 1 — — — — — — +IN — –IN
1 1 0 0 — +IN — — — — — — –IN
1 1 0 1 — — — +IN — — — — –IN
1 1 1 0 — — — — — +IN — — –IN
1 1 1 1 — — — — — — — +IN –IN
INITIATING CONVERSION READING DATA
Provided the master has write-addressed it, the Data can be read from the ADS7830 by read-
ADS7830 turns on the A/D converter section and addressing the part (LSB of address byte set to ‘1’)
begins conversions when it receives BIT 4 of the and receiving the transmitted byte. Converted data
command byte shown in the Command Byte. If the can only be read from the ADS7830 once a
command byte is correct, the ADS7830 will return an conversion has been initiated as described in the
ACK condition. preceding section.
Each 8-bit data word is returned in one byte, as
shown below, where D7 is the MSB of the data word,
and D0 is the LSB.
MSB 6 5 4 3 2 1 LSB
DATA D7 D6 D5 D4 D3 D2 D1 D0
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