Datasheet

MAX5306/MAX5307
nected to ground through a 1kΩ or 100kΩ (default)
resistor for each DAC. The third shutdown (shutdown 1)
command leaves the DACs outputs high impedance.
Table 2 lists the three shutdown modes of operation as
well as the power-up command.
Serial-Data Output (DOUT)
The DOUT (MAX5306) follows DIN with a 16 clock
cycle delay. The DOUT is capable of driving 20pF load
with a 50ns (max) delay from the falling edge of SCLK.
DOUT is primarily used for daisy-chaining multiple
devices. Optionally, DOUT can be used to monitor the
serial interface for valid communications by connecting
DOUT to a microprocessor input.
Low-Power, Low-Glitch, Octal 12-Bit Voltage-
Output DACs with Serial Interface
10 ______________________________________________________________________________________
CONTROL BITS DATA BITS
C3 C2 C1 C0
DAC
8
DAC
7
DAC
6
DAC
5
DAC
4
DAC
3
DAC
2
DAC
1
D03 D02 D01 D00
DESC. FUNCTION
1111 1 1 X X
Power-
Up
Power-Up individual DAC
buffers indicated by data in
DAC1 through DAC8. A one
indicates the DAC output is
active. A zero does not affect
the DACs present state.
1111 0 1 X X
Shut-
down 1
Shutdown individual DAC
buffers indicated by data in
DAC1 through DAC8. A one
indicates the DAC output is
high-impedance. A zero does
not affect the DACs present
state.
1111 1 0 X X
Shut-
down 2
Shutdown individual DAC
buffers indicated by data in
DAC1 through DAC8. A one
indicates the DAC is shutdown
and the output is connected to
GND through a 1kΩ resistor. A
zero does not affect the DACs
present state.
1111 0 0 X X
Shut-
down 3
Shutdown individual DAC
buffers indicated by data in
DAC1 through DAC8. A one
indicates the DAC is shutdown
and the output is connected to
GND through a 100kΩ resistor.
A zero does not affect the
DACs present state.
Table 2. Serial Interface Power-up and Power-down Commands
X = Don’t Care