max5121beee Maxim Integrated Products, Inc., max5121beee Datasheet - Page 16

• Manufacturer Part Number: max5121beee
• Description: 3v/5v, 12-bit, Serial Voltage-output Dacs With Internal Reference
• Manufacturer: Maxim Integrated Products, Inc.

Any number of MAX5120/MAX5121s can be daisy-
chained simply by connecting the serial data output pin
(DOUT) of one device to the digital input pin (DIN) of
the following device in the chain (Figure 12).
+3V/+5V, 12-Bit, Serial Voltage-Output DACs
with Internal Reference
Table 5. Unipolar Code Table (Gain = 1.6384V/V)
Table 6. Bipolar Code Table for Figure 11
Figure 12. Daisy-Chaining Multiple Devices with the Digital I/Os DIN/DOUT
16
MSB
MSB
______________________________________________________________________________________
1111 1111 1111
1000 0000 0001
1000 0000 0000
0111 1111 1111
0000 0000 0001
0000 0000 0000
1111 1111 1111
1000 0000 0001
1000 0000 0000
0111 1111 1111
0000 0000 0001
0000 0000 0000
DAC CONTENTS
DAC CONTENTS
LSB
LSB
SCLK
DIN
CS
MAX5120
MAX5121
Daisy-Chaining Devices
I
SUB-BIT
SUB-BIT
DOUT
SO
S0
0
0
0
0
0
0
0
0
0
0
0
0
+1.2207mV
+2.49878V
SCLK
DIN
CS
MAX5120
MAX5120
-1.2207µV
-2.49878V
+4.0950V
+2.049V
+2.048V
+2.047V
+1mV
-2.5V
MAX5120
MAX5121
INTERNAL REFERENCE
0V
INTERNAL REFERENCE
0V
II
DOUT
Another configuration allows several MAX5120/
MAX5121 DACs to share one common DIN signal line
(Figure 13). In this configuration, the data bus is com-
mon to all devices; data is not shifted through a daisy-
chain. However, more I/O lines are required in this
configuration, because each IC needs a dedicated CS
line.
+1.24939V
+610.35µV
-610.35µV
-1.24939V
MAX5121
MAX5121
+2.0475V
+1.0245V
+1.0235V
+1.024V
+0.5mV
-1.25V
ANALOG OUTPUT
ANALOG OUTPUT
0V
0V
SCLK
DIN
CS
MAX5120
MAX5121
III
DOUT
V
V
V
V
+V
+V
+V
+V
REF
REF
REF
REF
EXTERNAL REFERENCE
EXTERNAL REFERENCE
+V
V
REF
REF
REF
REF
REF
REF
·
·
·
·
[ {2 · (4095 / 4096)} - 1]
[ {2 · (2049 / 4096)} - 1]
[ {2 · (2048 / 4096)} - 1]
[ {2 · (2047 / 4096)} - 1]
(4095 / 4096)
(2049 / 4096)
(2048 / 4096)
(2047 / 4096)
·
(1 / 4096)
[ {2 · (14096)} - 1]
-V
0V
REF
TO OTHER
SERIAL DEVICES
·
1.6384
·
·
·
·
1.6384
1.6384
1.6384
1.6384