MAX5705 datasheet(21/26 Pages) MAXIM

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MAX5703/MAX5704/MAX5705

Ultra-Small, Single-Channel, 8-/10-/12-Bit Buffered Output

Voltage DACs with Internal Reference and SPI Interface

Maxim Integrated

Table 5. POWER (0100) Command Format

Table 6. Selectable DAC Output Impedance in Power-Down Mode

POWER Command

The MAX5703/MAX5704/MAX5705 feature a software-

controlled POWER mode command (B[23:20] = 0100).

In power-down, the DAC output is disconnected from

the buffer and is grounded with either one of the two

selectable internal resistors or set to high impedance.

See Table 5 and Table 6 for the selectable internal

resistor values in power-down mode. In power-down

mode, the DAC register retains its value so that the

output is restored when the device powers up. The serial

interface remains active in power-down mode with all

registers accessible.

In power-down mode, the internal reference can be

powered down or it can be set to remain powered-on for

external use. Also, in power-down mode, parts using the

external reference do not load the REF pin. See Table 5.

B23 B22 B21 B20 B19 B18 B17 B16 B15 B14 B13 B12 B11 B10 B9

B7 B6

X PD1 PD0 X

POWER

COMMAND

Don’t Care

Power

Mode:

00 =

Normal

01 = 1kI

10 =

100kI

11 = Hi-Z

Don’t Care

DEFAULT VALUES

COMMAND BYTE

DATA HIGH BYTE

DATA LOW BYTE

PD1 (B7)

PD0 (B6)

OPERATING MODE

Normal operation

Power-down with internal 1kI pulldown resistor to GND.

Power-down with internal 100kI pulldown resistor to GND.

Power-down with high-impedance output.

MAX5705 Datasheet(PDF) 21 Page - Maxim Integrated Products

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