+5V, Low-Power, Voltage-Output,

Serial 12-Bit DACs

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11

MAX531

MAX538

MAX539

MICROWIRE

PORT

SCLK

DIN

CS

DOUT

SK

SO

I/O

SI

THE DOUT-SI CONNECTION IS NOT REQUIRED FOR WRITING TO THE

DEVICE, BUT MAY BE USED FOR VERIFYING DATA TRANSFER .

MAX531

MAX538

MAX539

SPI

PORT

SCLK

DIN

CS

DOUT

SCK

MOSI

I/O

MISO

THE DOUT-MISO CONNECTION IS NOT REQUIRED FOR WRITING TO THE

DEVICE, BUT MAY BE USED FOR VERIFYING DATA TRANSFER .

CPOL = 0, CPHA = 0

Figure 4. Microwire Connection

Figure 5. SPI/QSPI Connection

Figure 6. Unipolar Configuration (0V to +2.048V Output)

33µF

REFIN

REFOUT

AGND

DGND

BIPOFF

RFB

VOUT

0V TO -5V

+5V

G = +1

MAX531

33µF

REFIN

REFOUT

AGND

DGND

BIPOFF

RFB

VOUT

0V TO -5V

+5V

G = +2

MAX531

Table 1. Unipolar Binary Code Table

Figure 7. Unipolar Configuration (0V to +4.096V Output)

Table 2. Unipolar Binary Code Table

INPUT

OUTPUT

1111

1111

1111

1000

0000

0001

1000

0000

0000

0111

1111

1111

0000

0000

0001

0000

0000

0000

4095

4096

2049

4096

2048

4096

2047

4096

1

4096

OV

INPUT

OUTPUT

1111

1111

1111

1000

0000

0001

1000

0000

0000

0111

1111

1111

0000

0000

0001

0000

0000

0000

4095

4096

2049

4096

2048

4096

2047

4096

1

4096

OV