MAX5154AEEE View Datasheet(PDF) - Maxim Integrated
Part Name
Description
Manufacturer
MAX5154AEEE Datasheet PDF : 16 Pages
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Low-Power, Dual, 12-Bit Voltage-Output DACs
with Serial Interface
Table 1. Serial-Interface Programming Commands
16-BIT SERIAL WORD
A0 C1 C0
D11.......................D0
(MSB)
(LSB)
S0
FUNCTION
001
12-bit DAC data
0
Load input register A; DAC registers are unchanged.
101
12-bit DAC data
0
Load input register B; DAC registers are unchanged.
010
12-bit DAC data
0
Load input register A; all DAC registers are updated.
110
12-bit DAC data
0
Load input register B; all DAC registers are updated.
011
12-bit DAC data
0
Load all DAC registers from the shift register
(start up both DACs with new data.).
100
111
xxxxxxxxxxxx
xxxxxxxxxxxx
0
Update both DAC registers from their respective input registers
(start up both DACs with data previously stored in the input registers).
0
Shut down both DACs (provided PDL = 1).
000
000
000
000
0 0 1 x xxxxxxxx
1 0 1 x xxxxxxxx
1 1 0 x xxxxxxxx
1 1 1 x xxxxxxxx
0
Update DAC register A from input register A
(start up DAC A with data previously stored in input register A).
0
Update DAC register B from input register B
(start up DAC B with data previously stored in input register B).
0
Shut down DAC A (provided PDL = 1).
0
Shut down DAC B (provided PDL = 1).
000
0 1 0 x xxxxxxxx
0
UPO goes low (default).
000
0 1 1 x xxxxxxxx
0
UPO goes high.
000
1 0 0 1 xxxxxxxx
0
Mode 1, DOUT clocked out on SCLK’s rising edge.
000
1 0 0 0 xxxxxxxx
0
Mode 0, DOUT clocked out on SCLK’s falling edge (default).
000
0 0 0 x xxxxxxxx
0
No operation (NOP).
x = Don’t care
Note: D11, D10, D9, and D8 become control bits when A0, C1, and C0 = 0. S0 is a sub bit, always zero.
SCLK
MAX5154 DIN
MAX5155
CS
SK
MICROWIRE
SO
PORT
I/O
Figure 2. Connections for Microwire
saved, allowing the MAX5154/MAX5155 to recall the
output state prior to entering shutdown when returning
to normal mode. Exit shutdown by recalling the previ-
ous condition or by updating the DAC with new infor-
mation. When returning to normal operation (exiting
shutdown), wait 20µs for output stabilization.
Serial Interface
The MAX5154/MAX5155 3-wire serial interface is com-
patible with both Microwire (Figure 2) and SPI/QSPI
(Figure 3) serial-interface standards. The 16-bit serial
input word consists of an address bit, two control bits,
12 bits of data (MSB to LSB), and one sub bit as shown
in Figure 4. The address and control bits determine the
MAX5154/ MAX5155’s response, as outlined in Table 1.
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