MAX531AESD データシートの表示（PDF） - Maxim Integrated
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MAX531AESD Datasheet PDF : 16 Pages
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+5V, Low-Power, Voltage-Output,
Serial 12-Bit DACs
SCLK
MAX531 DIN
MAX538
MAX539 CS
DOUT
SK
SO
MICROWIRE
PORT
I/O
SI
THE DOUT-SI CONNECTION IS NOT REQUIRED FOR WRITING TO THE
DEVICE, BUT MAY BE USED FOR VERIFYING DATA TRANSFER .
Figure 4. Microwire Connection
+5V
REFIN
VDD
REFOUT
BIPOFF
33µF
AGND MAX531
RFB
DGND
VOUT
VOUT
SCLK
MAX531 DIN
MAX538
MAX539 CS
SCK
MOSI SPI
PORT
I/O
DOUT
MISO
CPOL = 0, CPHA = 0
THE DOUT-MISO CONNECTION IS NOT REQUIRED FOR WRITING TO THE
DEVICE, BUT MAY BE USED FOR VERIFYING DATA TRANSFER .
Figure 5. SPI/QSPI Connection
+5V
VDD
REFIN
REFOUT
33µF
BIPOFF MAX531
RFB
AGND
DGND
VOUT
VOUT
VSS
0V TO -5V
G = +1
Figure 6. Unipolar Configuration (0V to +2.048V Output)
Table 1. Unipolar Binary Code Table
(0V to VREFIN Output), Gain = +1
INPUT
1111 1111 1111
1000 0000 0001
1000 0000 0000
0111 1111 1111
0000 0000 0001
OUTPUT
4095
(VREFIN) 4096
2049
(VREFIN) 4096
2048
(VREFIN) 4096 = +VREFIN / 2
2047
(VREFIN) 4096
1
(VREFIN) 4096
0000 0000 0000
OV
G = +2
VSS
0V TO -5V
Figure 7. Unipolar Configuration (0V to +4.096V Output)
Table 2. Unipolar Binary Code Table
(0V to 2VREFIN Output), Gain = +2
INPUT
1111 1111 1111
1000 0000 0001
1000 0000 0000
0111 1111 1111
0000 0000 0001
0000 0000 0000
OUTPUT
4095
+2 (VREFIN) 4096
2049
+2 (VREFIN) 4096
+2
(VREFIN)
2048
4096
=
+VREFIN
2047
+2 (VREFIN) 4096
+2
(VREFIN)
1
4096
OV
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