max5133beee Maxim Integrated Products, Inc., max5133beee Datasheet - Page 12

• Manufacturer Part Number: max5133beee
• Description: 5v/3v, 13-bit, Serial, Force/sense Dacs With 10ppm/ ? Internal Reference
• Manufacturer: Maxim Integrated Products, Inc.

+5V/+3V, 13-Bit, Serial, Force/Sense DACs
with 10ppm/°C Inter nal Reference
Table 1. Serial-Interface Programming Commands
X = Don’t care
The MAX5132/MAX5133 3-wire serial interface is com-
patible with SPI, QSPI, PIC16/PIC17 (Figure 4) and
MICROWIRE (Figure 5) interface standards. The 2-
byte-long serial input word contains three control bits
and 13 data bits in MSB-first format (Table 2).
The MAX5132/MAX5133’s digital inputs are double
buffered, which allows the user to:
The 16-bit input word may be sent in two 1-byte pack-
ets (SPI-, MICROWIRE- and PIC16/PIC17-compatible),
with CS low during this period. The control bits C2, C1,
and C0 (Table 1) determine:
The general timing diagram in Figure 6 illustrates how
data is acquired. CS must be low for the part to receive
data. With CS low, data at DIN is clocked into the regis-
ter on the rising edge of SCLK. When CS transitions
high, data is latched into the input and/or DAC registers,
depending on the setting of the three control bits C2,
C1, and C0. The maximum serial-clock frequency guar-
anteed for proper operation is 10MHz for the MAX5132
and 6.6MHz for the MAX5133. Figure 7 depicts a more
detailed timing diagram of the serial interface.
12
the clock edge on which DOUT transitions,
the state of the user-programmable logic output,
the configuration of the device after shutdown.
load the input register without updating the DAC
register,
update the DAC register with data from the input
register,
update the input and DAC registers concurrently.
C2
0
0
0
0
1
1
1
1
1
______________________________________________________________________________________
(SPI/QSPI/MICROWIRE/PIC16/PIC17)
C1
0
0
1
1
0
0
1
1
1
Serial-Interface Configuration
16-BIT SERIAL WORD
C0
0
1
0
1
1
0
0
1
1
D12 ............... D0
XXXXXXXXXXXXX
XXXXXXXXXXXXX
XXXXXXXXXXXXX
XXXXXXXXXXXXX
XXXXXXXXXXXXX
1XXXXXXXXXXXX
00XXXXXXXXXXX
13-Bit DAC Data
13-Bit DAC Data
No operation.
Load input register; DAC register unchanged.
Simultaneously load input and DAC registers; exit shutdown.
Update DAC register from input register; exit shutdown.
Shutdown DAC (provided 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).
Figure 4. SPI/QSPI Interface Connections (PIC16/PIC17)
Figure 5. MICROWIRE Interface Connections
( ) PIC16/PIC17 ONLY
MAX5132
MAX5133
MAX5132
MAX5133
SCLK
SCLK
DIN
DIN
CS
CS
FUNCTION
CPOL = 0, CPHA = 0
(CKE = 1, CKP = 0, SMP = 0,
SSPM3 - SSPMO = 0001)
SO
I/O
SK
MOSI
SCK
I/O
(PIC16/PIC17)
MICROWIRE
SPI/QSPI
PORT
PORT
V
SS
DD