Rainbow Electronics MAX5123 - Manual (Page 17)

MAX5122/MAX5123
+5V/+3V, 12-Bit, Serial, Force/Sense DACs
with 10ppm/°C Internal Reference
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V REF (2049 / 4096) 2 1000 0000 0001 0
0
V REF (2047 / 4096) 2 0111 1111 1111 0
0 V REF (2048 / 4096) 2 1000 0000 0000
0 0000 0000 0000 0
0
V REF (4095 / 4096) 2 1111 1111 1111
V REF (1 / 4096) 2 0000 0000 0001
DAC CONTENTS
SUB-BIT
S0
EXTERNAL REFERENCE
MAX5122/MAX5123
V REF [ {2 (2049 / 4096)} - 1] 1000 0000 0001 0
0
+610.35µV
+1.24939V
DAC CONTENTS
V REF [ {2 (2047 / 4096)} - 1] 0111 1111 1111 0
0
-610.35µV
0V V REF [ {2 (2048 / 4096)} - 1] 1000 0000 0000
-V REF 0000 0000 0000 0
0
-1.25V
-1.24939V
V REF [ {2 (4095 / 4096)} - 1] 1111 1111 1111
V REF [ {2 (1 / 4096)} - 1] 0000 0000 0001
Table 5. Unipolar Code Table (Gain = +1.6384V/V)
Table 6. Bipolar Code Table (Figure 10)
+2.50122V
+4.99878V
+1.25061V
+2.49939V
+2.49878V
+2.5V
+1.24939V
+1.25V
MAX5122 MAX5123
0V
+1.2207mV
0V
+610.35µV
INTERNAL REFERENCE
MSB LSB
ANALOG OUTPUT
ANALOG OUTPUT
+1.2207mV
+2.49878V
-1.2207mV
0V
-2.5V
-2.49878V
TO OTHER
SERIAL DEVICES
MAX5122
MAX5123
DIN
SCLK
CS
MAX5122
MAX5123 MAX5122
MAX5123
DIN DOUT DOUT DOUT
SCLK
CS
I II III
DIN
SCLK
CS
Figure 11. Daisy-Chaining Multiple Devices with the Digital I/Os DIN/DOUT
INTERNAL REFERENCE SUB-BIT
S0 MAX5123
EXTERNAL REFERENCE
MAX5122/MAX5123 MAX5122
MSB LSB