Rainbow Electronics MAX5131 - Manual (Page 16)

MAX5130/MAX5131
Daisy-Chaining Devices
Any number of MAX5130/MAX5131s 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).
Another configuration allows several MAX5130/
MAX5131 DACs to share one common DIN signal line
(Figure 13). In this configuration, the data bus is
common 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.
+3V/+5V, 13-Bit, Serial Voltage-Output DACs
with Internal Reference
16 ______________________________________________________________________________________
+V REF (4097 / 8192) · 1.6384 1 0000 0000 0001 +2.0485V
+4.0955V
+1.02425V
+2.04775V
+V REF (4095 / 8192) · 1.6384 0 1111 1111 1111 +2.0475V
+2.0480V
+1.02375V
+1.02400V +V REF (4096 / 8192) · 1.6384 1 0000 0000 0000
0V 0 0000 0000 0000 0V
+0.5mV
0V
+0.25mV
+V REF (8191 / 8192) · 1.6384 1 1111 1111 1111
ANALOG OUTPUT
+V REF (1 / 8192) · 1.6384 0 0000 0000 0001
INTERNAL REFERENCE
DAC CONTENTS
MSB LSB
MAX5130 MAX5131
EXTERNAL REFERENCE
V REF
· [ {2 · (4097 / 8192)} - 1] 1 0000 0000 0001 +610.35µV
+2.49939V
+305.18µV
+1.24969V
DAC CONTENTS
MSB LSB
V REF
· [ {2 · (4095 / 8192)} - 1] 0 1111 1111 1111 -610.35µV
0V
-305.18µV
0V
MAX5130
V REF
· [ {2 · (4096 / 8192)} - 1] 1 0000 0000 0000
MAX5130
-V
REF
0 0000 0000 0000 -2.5V
-2.49939V
-1.25V
-1.24969V
EXTERNAL REFERENCE
V REF
· [ {2 · (8191 / 8192)} - 1] 1 1111 1111 1111
ANALOG OUTPUT
V REF
· [ {2 · (1 / 8192)} - 1] 0 0000 0000 0001
INTERNAL REFERENCE
Table 5. Unipolar Code Table (Gain = +1.6384V/V)
Table 6. Bipolar Code Table for Figure 11
TO OTHER
SERIAL DEVICES
MAX5130
MAX5131
DIN
SCLK
CS
MAX5130
MAX5131 MAX5130
MAX5131
DIN DOUT DOUT DOUT
SCLK
CS
I II III
DIN
SCLK
CS
Figure 12. Daisy-Chaining Multiple Devices with the Digital I/Os DIN/DOUT