Rainbow Electronics MAX11645 - Manual (Page 15)

MAX11644/MAX11645
Low-Power, 1-/2-Channel, I
2
C, 12-Bit ADCs
in Ultra-Tiny 1.9mm x 2.2mm Package
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BIT 7
(MSB)
BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1
BIT 0
(LSB)
REG SCAN1 SCAN0 X X X CS0 SGL/DIF
BIT NAME DESCRIPTION
7 REG Register bit. 1 = setup byte (see Table 1), 0 = configuration byte.
6 SCAN1
5 SCAN0
Scan select bits. Two bits select the scanning configuration (Table 5). Default to 00 at power-up.
4 X
3 X
2 X
1 CS0
Channel select bit. CS0 selects which analog input channels are to be used for conversion
(Tables 3 and 4). Default to 0000 at power-up.
0 SGL/DIF
1 = single-ended, 0 = differential (Tables 3 and 4). Defaults to 1 at power-up. See the Single-
Ended/Differential Input section.
Table 2. Configuration Byte Format
CS0 AIN0 AIN1 GND
0 + -
1 + -
X = Don’t care.
Table 3. Channel Selection in Single-Ended Mode (SGL/DIF = 1)
CS0 AIN0 AIN1
0 + -
1 - +
Table 4. Channel Selection in Differential Mode (SGL/DIF = 0)