MAX5580A Ver la hoja de datos (PDF) - Maxim Integrated
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MAX5580A Datasheet PDF : 34 Pages
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Buffered, Fast-Settling, Quad,
12-/10-/8-Bit, Voltage-Output DACs
Serial-Interface Programming Commands
Tables 2a, 2b, and 2c provide all the serial-interface
programming commands for the MAX5580–MAX5585.
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 serial-inter-
face diagrams for write operations.
Loading Input and DAC Registers
The MAX5580–MAX5585 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.
MICROWIRE
VDD
VDD
SK
SO
I/O
MAX5580–
DVDD MAX5585
DSP
SCLK
DIN
CS
SPI OR QSPI
VDD
VDD
SCK
MOSI
SS OR I/O
MAX5580–
DVDD MAX5585
DSP
SCLK
DIN
CS
MICROWIRE OR SPI (CPOL = 0, CPHA = 0) 8-BIT CONTROL DATA OR 12-BIT DAC DATA WRITE:
CS
CS MUST REMAIN LOW BETWEEN BYTES ON A 16-BIT WRITE OPERATION
COMMAND TAKES EFFECT HERE
ONLY IF SCLK COUNT = N ✕ 16
SCLK
DIN
C3 C2 C1 C0 D11 D10 D9 D8
D7 D6 D5 D4 D3 D2 D1 D0
SPI (CPOL = 1, CPHA = 1) 8-BIT CONTROL DATA OR 12-BIT DAC DATA WRITE:
CS
CS MUST REMAIN LOW BETWEEN BYTES ON A 16-BIT WRITE OPERATION
COMMAND TAKES EFFECT HERE
ONLY IF SCLK COUNT = N ✕ 16
SCLK
DIN
C3 C2 C1 C0 D11 D10 D9 D8
D7 D6 D5 D4 D3 D2 D1 D0
Figure 3. MICROWIRE and SPI Single DAC Writes (CPOL = 0, CPHA = 0 or CPOL = 1, CPHA = 1)
DSP
VSS
TCLK, SCLK, OR CLKX
DT OR DX
TFS OR FSX
MAX5580–
DGND MAX5585
DSP
SCLK
DIN
CS
SPI OR QSPI
VSS
SCK
MOSI
SS OR I/O
MAX5580–
DGND MAX5585
DSP
SCLK
DIN
CS
DSP OR SPI (CPOL = 0, CPHA = 0) 8-BIT CONTROL DATA OR 12-BIT DAC DATA WRITE:
CS
CS MUST REMAIN LOW BETWEEN BYTES ON A 16-BIT WRITE OPERATION
COMMAND TAKES EFFECT HERE
ONLY IF SCLK COUNT = N ✕ 16
SCLK
DIN
C3 C2 C1 C0 D11 D10 D9 D8
D7 D6 D5 D4 D3 D2 D1 D0
DSP OR SPI (CPOL = 1, CPHA = 0) 8-BIT CONTROL DATA OR 12-BIT DAC DATA WRITE:
CS
CS MUST REMAIN LOW BETWEEN BYTES ON A 16-BIT WRITE OPERATION
SCLK
COMMAND TAKES EFFECT HERE
ONLY IF SCLK COUNT = N ✕ 16
DIN
C3 C2 C1 C0 D11 D10 D9 D8
D7 D6 D5 D4 D3 D2 D1 D0
Figure 4. DSP and SPI Single DAC Writes (CPOL = 0, CPHA = 1 or CPOL = 1, CPHA = 0)
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