max5309 Maxim Integrated Products, Inc., max5309 Datasheet - Page 9

• Manufacturer Part Number: max5309
• Description: Low-power, Low-glitch, Octal 10-bit Voltage-output Dacs With Serial Interface
• Manufacturer: Maxim Integrated Products, Inc.

20ns before the next write sequence since a write
sequence is initiated on a falling edge of CS. If CS
goes high prior to completing 16 cycles of SCLK, the
input data is discarded. To initiate a new data transfer,
drive CS low again. The serial clock (SCLK) can be
either high or low between CS write pulses. Figure 4
shows the timing diagram for the complete 3-wire serial
interface transmission.
Figure 1. Functional Diagram
Low-Power, Low-Glitch, Octal 10-Bit Voltage-
(MAX5308) DOUT
(MAX5309) CLR
SCLK
_______________________________________________________________________________________
V
DIN
LDAC
CS
DD
SHIFT REGISTER
TO PARALLEL
MAX5308
MAX5309
SERIAL
Output DACs with Serial Interface
GND
REGISTER
REGISTER
REGISTER
REGISTER
REGISTER
REGISTER
REGISTER
REGISTER
INPUT
INPUT
INPUT
INPUT
INPUT
INPUT
INPUT
INPUT
1
2
3
4
5
6
7
8
The MAX5308/MAX5309 digital inputs are double-
buffered. Depending on the command issued through
the serial interface, the input register(s) can be loaded
without affecting the DAC register(s), the DAC regis-
ter(s) can be loaded directly, or all eight registers can
be updated simultaneously from the input registers.
REGISTER
REGISTER
REGISTER
REGISTER
REGISTER
REGISTER
REGISTER
REGISTER
DAC
DAC
DAC
DAC
DAC
DAC
DAC
DAC
DAC
DAC
DAC
DAC
DAC
DAC
DAC
DAC
REF
1
2
3
4
5
6
8
7
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8
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