Datasheet

MAX11100
16-Bit, +5V, 200ksps ADC with 10µA Shutdown
14Maxim Integrated
Data can be output in three 8-bit sequences or con-
tinuously. The bytes contain the results of the conversion
padded with eight leading zeros before the MSB. If the
serial clock has not been idled after the LSB (D0) and CS
has been kept low, DOUT sends trailing zeros.
SPI and MICROWIRE Interfaces
When using the SPI (Figure 10a) or MICROWIRE (Figure 10b)
interfaces, set CPOL = 0 and CPHA = 0. Conversion
begins with a falling edge on CS (Figure 10c). Three con-
secutive 8-bit readings are necessary to obtain the entire
16-bit result from the ADC. DOUT data transitions on
the serial clock’s falling edge. The first 8-bit data stream
contains all leading zeros. The second 8-bit data stream
contains the MSB through D8. The third 8-bit data stream
contains D7 through D0.
Figure 10c. SPI/MICROWIRE Interface Timing Sequence (CPOL = CPHA = 0)
Figure 10a. SPI Connections
Figure 10b. MICROWIRE Connections
DOUT*
CS
SCLK
1ST BYTE READ
2ND BYTE READ
*WHEN CS IS HIGH, DOUT = HIGH-Z
MSB
HIGH-Z
3RD BYTE READ
LSB
D1 D0D7 D6 D5 D4 D3 D2
2420
1612
8
641
D15 D14 D13 D12 D11 D10 D9 D8 D7
00000000
TIMING NOT TO SCALE.
SCLK
DOUT
I/O
SCK
MISO
SPI
V
DD
SS
MAX11100
CS
MAX11100
CS
MICROWIRE
SCLK
DOUT
I/O
SK
SI