Rainbow Electronics MAX1039 - Manual (Page 18)

MAX1036–MAX1039
2.7V to 5.5V, Low-Power, 4-/12-Channel
2-Wire Serial 8-Bit ADCs
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CS3 1 CS2 1 CS1 CS0 AIN0 AIN1 AIN2 AIN3 2 AIN4 AIN5 AIN6 AIN7 AIN8 AIN9 AIN10 AIN11 2
0 0 0 0 + -
0 0 0 1 - +
0 0 1 0 + -
0 0 1 1 - +
0 1 0 0 + -
0 1 0 1 - +
0 1 1 0 + -
0 1 1 1 - +
1 0 0 0 + -
1 0 0 1 - +
1 0 1 0 + -
1 0 1 1 - +
1 1 0 0 RESERVED
1 1 0 1 RESERVED
1 1 1 0 RESERVED
1 1 1 1 RESERVED
Table 4. Channel Selection in Pseudo-Differential Mode (SGL / DIF = 0)
Note 1: For MAX1036/MAX1037, CS3 and CS2 are internally set to zero.
Note 2: When SEL1 =1, a pseudo-differential read between AIN2 and AIN3/REF (MAX1036/MAX1037) or AIN10 and AIN11/REF
(MAX1038/MAX1039) returns the difference between GND and AIN2 or AIN10, respectively. For example, a differential read of
1011 returns the negative difference between AIN10 and GND.
Note 3: When scanning multiple channels (SCAN0 = 0), CS0 = 0 causes the even-numbered channel-select bits to be scanned,
while CS0 = 1 causes the odd-numbered channel-select bits to be scanned. For example, if the MAX1038/MAX1039
SCAN[1:0] = 00 and CS[3:0] = 1010, a differential read returns AIN0–AIN1, AIN2–AIN3, AIN4–AIN5, AIN6–AIN7,
AIN8–AIN9, and AIN10–AIN11. If the MAX1038/MAX1039 SCAN[1:0] = 00 and CS[3:0] = 1011, a differential read returns
AIN1–AIN0, AIN3–AIN2, AIN5–AIN4, AIN7–AIN6, AIN9–8, and AIN11–AIN10.