MAX512CSD+T Maxim Integrated Products, MAX512CSD+T Datasheet - Page 11

• Manufacturer Part Number: MAX512CSD+T
• Description: IC DAC 8BIT TRIPLE SERIAL 14SOIC
• Manufacturer: Maxim Integrated Products

Specifications of MAX512CSD+T

• Settling Time: 70µs
• Number Of Bits: 8
• Data Interface: Serial
• Number Of Converters: 3
• Voltage Supply Source: Dual ±
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 14-SOIC (3.9mm Width), 14-SOL
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power Dissipation (max): -

X
*
Table 2 lists the serial-input data format. The 16-bit
input word consists of an 8-bit control byte and an 8-bit
data byte. The 8-bit control byte is not decoded inter-
nally. Every control bit performs one function. Data is
clocked in starting with Q2 (uncommitted bit), followed
by the remaining control bits and the data byte. The
LSB of the data byte (B0) is the last bit clocked into the
shift register (Figure 2).
Example of a 16-bit input word:
The example above performs the following functions:
Table 2. Serial-Interface Programming Commands
Q2 Q1 SC SB SA LC LB LA B7 B6 B5 B4 B3 B2 B1 B0
Loaded
in First
Q2
X
X
X
*
*
*
*
*
*
*
*
*
*
• 80hex (128 decimal) loaded into DAC registers
• Content of the DAC C register remains unchanged.
• DAC A and DAC B are active.
• DAC C is shut down.
• LOUT is reset to 0.
Don’t care.
Not shown for clarity. The functions of loading and shutting down the DACs and programming the logic can be combined in a single command.
A and B.
0
Q1
0
1
*
*
*
*
*
*
*
*
*
*
1
Serial-Input Data Format and Control Codes
Low-Cost, Triple, 8-Bit Voltage-Output DACs
SC
0
1
0
0
1
0
*
*
*
*
*
*
*
CONTROL
0
SB
0
0
1
0
1
*
*
*
*
*
*
*
______________________________________________________________________________________
0
SA
0
0
0
1
1
*
*
*
*
*
*
*
1
LC
1
0
1
0
0
1
*
*
*
*
*
*
*
1
LB
0
0
1
0
1
*
*
*
*
*
*
*
0
LA
0
0
0
1
1
0
*
*
*
*
*
*
*
0
MSB
B7
X
X
X
X
X
X
X
X
0
B6
X
X
X
X
X
X
X
X
0
Loaded
in Last
B5
0
X
X
X
X
X
X
X
X
8-Bit DAC Data
8-Bit DAC Data
8-Bit DAC Data
8-Bit DAC Data
0
B4
X
X
X
X
X
X
X
X
DATA
B3
X
X
X
X
X
X
X
X
The digital inputs are compatible with CMOS logic.
Supply current increases slightly when toggling the
logic inputs through the transition zone between
(0.3)(V
The latched digital output (LOUT) has a 1.6mA source
capability while maintaining a (V
With a 1.6mA sink current, the output voltage is guaran-
teed to be no more than 0.4V. The output can be used
for digital auxiliary control. Please note that the digital
output remains fully active during shutdown mode.
The MAX512/MAX513 serial interface is compatible with
Microwire, SPI, and QSPI. For SPI and QSPI, clear the
CPOL and CPHA bits (CPOL = 0 and CPHA = 0).
CPOL = 0 sets the inactive state of clock to zero and
CPHA = 0 changes data at the falling edge of SCLK.
This setting allows both SPI and QSPI to run at full clock
speeds (0.5MHz and 4MHz, respectively). If a serial port
is not available on your µP, three bits of a parallel port
can be used to emulate a serial port by bit manipulation.
Minimize digital feedthrough at the voltage outputs by
operating the serial clock only when necessary.
B2
X
X
X
X
X
X
X
X
with Serial Interface
DD
B1
X
X
X
X
X
X
X
X
) and (0.7)(V
LSB
B0
X
X
X
X
X
X
X
X
No Operation to DAC Registers
Load Register to DAC C
Load Register to DAC B
Load Register to DAC A
Load All DAC Registers
All DACs Active
Shut Down DAC C
Shut Down DAC B
Shut Down DAC A
Shut Down All DACs
Reset LOUT
Set LOUT
DD
).
Microprocessor Interfacing
FUNCTION
DD
- 0.4V) output level.
Digital Output
Digital Inputs
11