Datasheet

AD7176-2 Data Sheet
Rev. A | Page 22 of 68
Channel Map Configuration
The AD7176-2 has four independent channels (see Block C in
Figure 28). The user can select which of the four setups is used
for each channel. This allows for per channel configuration.
Channel Map Register
The channel map register is used to select which of the five
analog input pins are used as either the positive analog input or
the negative analog input for that channel. This register also
contains a channel enable/disable bit and the setup selection
bits, which are used to pick which of the four available setups
are used for this channel.
When the AD7176-2 is operating in continuous conversion
mode with more than one channel enabled, the channel
sequencer cycles through the enabled channels in sequential
order, from Channel Map 0 to Channel Map 3. If a channel is
disabled, it is skipped by the sequencer. Details of the channel
map register for Channel 0 are shown in Table 15.
Table 15. Channel Map Register
Reg Name Bits Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Reset RW
0x10 CHMAP0 [15:8] CH_EN0 RESERVED SETUP_SEL0 RESERVED AINPOS0[4:3] 0x8001 RW
[7:0] AINPOS0[2:0] AINNEG0