
MAX1391/MAX1394
12
______________________________________________________________________________________
1.5V to 3.6V, 416ksps, 1-Channel True-Differential/
2-Channel Single-Ended, 8-Bit, SAR ADCs
ADC
STATE
BIPOLAR (AIN1)*
*INDICATES THE MAX1394
UNI (AIN2)*
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1
SCLK
HIGH-Z
DOUT
D7
D6
D5
D4
D3
D2
D1
D0
POWER-DOWN
POWER-
DOWN
SAMPLING INSTANT
UNI/BIP
(CH1/CH2)*
CS = OE
POWER-UP
AND ACQUIRE
(tACQ)
HOLD AND CONVERT
(tCONV)
Figure 8. Serial-Interface Timing for SPI/QSPI (CPOL = CPHA = 1) and MICROWIRE (G6 = 0, G5 = 1)
ADC
STATE
BIPOLAR (AIN1)*
UNI (AIN2)*
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1
SCLK
HIGH-Z
*INDICATES THE MAX1394
HIGH-Z
DOUT
D7
D6
D5
D4
D3
D2
D1
D0
POWER-DOWN
POWER-
DOWN
SAMPLING INSTANT
UNI/BIP
(CH1/CH2)*
CS = OE
POWER-UP
AND ACQUIRE
(tACQ)
HOLD AND CONVERT
(tCONV)
Figure 9. Serial-Interface Timing for SPI/QSPI (CPOL = CPHA = 0) and MICROWIRE (G6 = 0, G5 = 0)