MAX11100 Datasheet, PDF (14/19 Pages) Maxim Integrated Products – 16-Bit, +5V, 200ksps ADC with 10μA Shutdown

MAX11100
16-Bit, +5V, 200ksps ADC with 10µA Shutdown
I/O
SCK
MISO
SPI
VDD
SS
Figure 10a. SPI Connections
I/O
SK
SI
MICROWIRE
CS
SCLK
DOUT
MAX11100
CS
SCLK
DOUT
MAX11100
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 10b. MICROWIRE Connections
SCLK
CS
1ST BYTE READ
1
4
6
8
DOUT*
0
0
0
0
0
0
0
0
*WHEN CS IS HIGH, DOUT = HIGH-Z
3RD BYTE READ
20
2ND BYTE READ
12
16
D15 D14 D13 D12 D11 D10 D9 D8 D7
MSB
24
TIMING NOT TO SCALE.
D7 D6 D5 D4 D3 D2 D1 D0
LSB
HIGH-Z
Figure 10c. SPI/MICROWIRE Interface Timing Sequence (CPOL = CPHA = 0)
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