Rainbow Electronics MAX1068 - Manual (Page 15)

MAX1067/MAX1068
Multichannel, 14-Bit, 200ksps Analog-to-Digital
Converters
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BIT7 BIT6 BIT5
CH SEL2 CH SEL1 CH SEL0
CHANNEL
AIN_
0 0 0 0
0 0 1 1
0 1 0 2
0 1 1 3
1 0 0 4
1 0 1 5
1 1 0 6
1 1 1 7
Table 2. Channel Select
BIT4 BIT3
ACTION
SCAN1 SCAN0
Single channel, no scan 0 0
Sequentially scan channels 0 through N
(N
≤ 3)
0 1
Sequentially scan channels 2 through N
(2
≤ N ≤ 3)
1 0
Scan channel N 4 times 1 1
Table 3. MAX1067 Scan Mode, Internal
Clock Only
BIT4 BIT3
ACTION
SCAN1 SCAN0
Single channel, no scan 0 0
Sequentially scan channels 0 through N
(N
≤ 7)
0 1
Sequentially scan channels 4 through N
(4
≤ N ≤ 7)
1 0
Scan channel N 8 times 1 1
Table 4. MAX1068 Scan Mode, Internal
Clock Only (Not for DSP Mode)
BIT2 BIT1
REF/PD_
SEL1
REF/PD
SEL0
REFERENCE
REFERENCE MODE
(INTERNAL REFERENCE)
TYPICAL
SUPPLY
CURRENT
TYPICAL WAKE-
UP TIME
(C REF = 1µF)
0 0 Internal
Internal reference and reference buffer stay
on between conversions
1mA NA
0 1 Internal
Internal reference and reference buffer off
between conversions
0.6µA 5ms
1 0 Internal
Internal reference on, reference buffer off
between conversions
0.43mA 5ms
1 1 External Internal reference and buffer always off 0.6µA NA
Table 5. Power-Down Modes
BIT0
INT/EXT
CLK
CLOCK MODE
0 External clock
1 Internal clock
Table 6. Clock Modes