max5152bmje Maxim Integrated Products, Inc., max5152bmje Datasheet - Page 10

• Manufacturer Part Number: max5152bmje
• Description: Low-power, Dual, 13-bit Voltage-output Dacs With Configurable Outputs
• Manufacturer: Maxim Integrated Products, Inc.

The MAX5152/MAX5153 feature a software-program-
mable shutdown mode that reduces the typical supply
current to 2µA. The two DACs can be shut down inde-
pendently or simultaneously by using the appropriate
programming word. For instance, enter shutdown mode
(for both DACs) by writing an input control word of
111XXXXXXXXXXXXX (Table 1). In shutdown mode, the
reference inputs and amplifier outputs become high
impedance, and the serial interface remains active.
Data in the input registers is saved, allowing the
MAX5152/MAX5153 to recall the output state prior to
entering shutdown when returning to normal mode. Exit
shutdown by recalling the previous condition or by
updating the DAC with new information. When returning
to normal operation (exiting shutdown), wait 20µs for
output stabilization.
Low-Power, Dual, 13-Bit Voltage-Output DACs
with Configurable Outputs
Table 1. Serial-Interface Programming Commands
“x” = don’t care
Note: When A0, C1, and C0 = “0”, D12, D11, D10, and D9 become control bits.
10
A0
______________________________________________________________________________________
0
1
0
1
0
1
1
0
0
0
0
0
0
0
0
0
C1
0
0
1
1
1
0
1
0
0
0
0
0
0
0
0
0
16-BIT SERIAL WORD
C0
1
1
0
0
1
0
1
0
0
0
0
0
0
0
0
0
D 1 2 . . . . . . . . . . . . . . . . D 0
MSB
0 0 1 x xxxxxxxxx
1 0 1 x xxxxxxxxx
1 1 0 x xxxxxxxxx
1 1 1 x xxxxxxxxx
0 1 0 x xxxxxxxxx
0 1 1 x xxxxxxxxx
1 0 0 1 xxxxxxxxx
1 0 0 0 xxxxxxxxx
0 0 0 x xxxxxxxxx
13 bits of DAC data
13 bits of DAC data
13 bits of DAC data
13 bits of DAC data
13 bits of DAC data
xxxxxxxxxxxxx
xxxxxxxxxxxxx
Power-Down Mode
LSB
Load input register A; DAC register is unchanged.
Load input register B; DAC register is unchanged.
Load input register A; all DAC registers are updated.
Load input register B; all DAC registers are updated.
Load all DAC registers from the shift register (start up both DACs with new
data).
Update both DAC registers from their respective input registers
(start up both DACs with data previously stored in the input registers).
Shut down both DACs if PDL = 1.
Update DAC register A from input register A (start up DAC A with data previ-
ously stored in input register A).
Update DAC register B from input register B (start up DAC B with data previ-
ously stored in input register B).
Shut down DAC A when PDL = 1.
Shut down DAC B when PDL = 1.
UPO goes low (default).
UPO goes high.
Mode 1, DOUT clocked out on SCLK’s rising edge.
Mode 0, DOUT clocked out on SCLK’s falling edge (default).
No operation (NOP).
The MAX5152/MAX5153 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,
and 13 bits of data (MSB to LSB) as shown in Figure 4.
The address and control bits determines the response
of the MAX5152/MAX5153, as outlined in Table 1.
The MAX5152/MAX5153’s digital inputs are double
buffered, which allows any of the following: loading the
input register(s) without updating the DAC register(s),
updating the DAC register(s) from the input register(s),
or updating the input and DAC registers concurrently.
The address and control bits allow for the DACs to act
independently.
FUNCTION
Serial Interface