max5307 Maxim Integrated Products, Inc., max5307 Datasheet - Page 9

• Manufacturer Part Number: max5307
• Description: Low-power, Low-glitch, Octal 12-bit Voltage-output Dacs With Serial Interface
• Manufacturer: Maxim Integrated Products, Inc.

Figure 1. Functional Block Diagram
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.
The MAX5306/MAX5307 digital inputs are double-
buffered. Depending on the command issued through
Low-Power, Low-Glitch, Octal 12-Bit Voltage-
(MAX5307) CLR
(MAX5306) DOUT
_______________________________________________________________________________________
LDAC
SCLK
V
DIN
DD
CS
SERIAL TO PARALLEL
SHIFT REGISTER
MAX5306
MAX5307
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 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.
The MAX5306/MAX5307 include three software-con-
trolled shutdown modes that reduce the supply current
to less than 1µA. In two of the three shutdown modes
(shutdown 2 and 3) the outputs are independently con-
REGISTER
REGISTER
REGISTER
REGISTER
REGISTER
REGISTER
REGISTER
REGISTER
DAC
DAC
DAC
DAC
DAC
DAC
DAC
DAC
REF
DAC
DAC
DAC
DAC
DAC
DAC
DAC
DAC
1
2
3
4
5
6
8
7
Shutdown Modes
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8
9