MAX5590 datasheet(18/33 Pages) MAXIM

18 / 33 page

Buffered, Fast-Settling, Octal, 12/10/8-Bit,

Voltage-Output DACs

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SCLK

DIN

D11

D10

DIN

SCLK

DVDD

COMMAND TAKES EFFECT HERE

ONLY IF SCLK COUNT = N ✕ 16

COMMAND TAKES EFFECT HERE

ONLY IF SCLK COUNT = N ✕ 16

MICROWIRE OR SPI (CPOL = 0, CPHA = 0) 8-BIT CONTROL DATA OR 12-BIT DAC DATA WRITE:

CS MUST REMAIN LOW BETWEEN BYTES ON A 16-BIT WRITE OPERATION

SPI (CPOL = 1, CPHA = 1) 8-BIT CONTROL DATA OR 12-BIT DAC DATA WRITE:

CS MUST REMAIN LOW BETWEEN BYTES ON A 16-BIT WRITE OPERATION

DIN

SCLK

MAX5590–

MAX5595

VDD

MICROWIRE

I/O

SCLK

DIN

DVDD

MAX5590–

MAX5595

VDD

SPI OR QSPI

SCK

MOSI

SS OR I/O

DSP

D11

D10

SCLK

DIN

D11

D10

D11

D10

DIN

SCLK

DGND

COMMAND TAKES EFFECT HERE

ONLY IF SCLK COUNT = N ✕ 16

COMMAND TAKES EFFECT HERE

ONLY IF SCLK COUNT = N ✕ 16

DSP OR SPI (CPOL = 0, CPHA = 0) 8-BIT CONTROL DATA OR 12-BIT DAC DATA WRITE:

DSP OR SPI (CPOL = 1, CPHA = 0) 8-BIT CONTROL DATA OR 12-BIT DAC DATA WRITE:

DIN

SCLK

MAX5590–

MAX5595

VSS

DSP

TCLK, SCLK, OR CLKX

DT OR DX

TFS OR FSX

SCLK

DIN

DGND

MAX5590–

MAX5595

VSS

SPI OR QSPI

SCK

MOSI

SS OR I/O

DSP

CS MUST REMAIN LOW BETWEEN BYTES ON A 16-BIT WRITE OPERATION

Figure 3. MICROWIRE and SPI Single DAC Writes (CPOL = 0, CPHA = 0 or CPOL = 1, CPHA = 1)

Figure 4. DSP and SPI Single DAC Writes (CPOL = 0, CPHA = 1 or CPOL = 1, CPHA = 0)

Serial-Interface Programming Commands

Tables 2a, 2b, and 2c provide all of the serial-interface

programming commands for the MAX5590–MAX5595.

Table 2a shows the basic DAC programming com-

mands, Table 2b gives the advanced-feature program-

ming commands, and Table 2c provides the 24-bit

read commands. Figures 3 and 4 provide the serial-

interface diagrams for read and write operations.

Loading Input and DAC Registers

The MAX5590–MAX5595 contain a 16-bit shift register

that is followed by a 12-bit input register and a 12-bit

DAC register for each channel (see the Functional

Diagrams). Tables 3, 4, and 5 highlight a few of the

commands that handle the loading of the input and

DAC registers. See Table 2a for all DAC programming

commands.

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