max5500 Maxim Integrated Products, Inc., max5500 Datasheet - Page 10

• Manufacturer Part Number: max5500
• Description: Low-power, Quad, 12-bit Voltage-output Dacs With Serial Interface
• Manufacturer: Maxim Integrated Products, Inc.

Low-Power, Quad, 12-Bit
Voltage-Output DACs with Serial Interface
Figure 5. Serial-Interface Timing Diagram
Figure 6. Detailed Serial-Interface Timing Diagram
Drive power-down lockout, PDL, low to disable software
shutdown. When in shutdown, transitioning PDL from
high to low wakes up the device with the output set to
the state prior to shutdown. Use PDL to asynchronously
wake up the device.
The MAX5500/MAX5501 can be daisy chained by con-
necting DOUT of one device to DIN of another device
(Figure 7).
10
______________________________________________________________________________________
DOUT
SCLK
DIN
CS
(MODE 0)
(MODE 1)
DOUT
SCLK
DOUT
DIN
CS
t
CSO
Power - Down Lockout (PDL)
A1
A1
A1
t
CSS
t
Daisy Chaining Devices
1
MSB FROM
PREVIOUS WRITE
DS
MSB FROM
PREVIOUS WRITE
A0
t
A0
DH
A0
C1
C1
C1
C0 D11 D10 D9
C0
C0
t
CL
D11 D10 D9
D11 D10 D9
t
CH
DATA PACKET (N-1)
DATA PACKET (N-1)
DATA PACKET (N)
D8
D8
D8
8
D7
D7
D7
9
D6
Each DOUT output of the MAX5500/MAX5501 includes
an internal active pullup. The sink/source capability of
DOUT determines the time required to discharge/charge
a capacitive load. See the serial-data-out V
specifications in the Electrical Characteristics.
Figure 8 shows an alternate method of connecting sev-
eral MAX5500/MAX5501 devices. In this configuration,
the data bus is common to all devices. Data is not shift-
ed through a daisy chain. More I/O lines are required in
this configuration because a dedicated chip-select
input (CS) is required for each IC.
D6
D6
D5
D5
D5
t
DO1
D4
D4
D4
t
CP
D3
t
DO2
D3
D3
D2
D2
D2
D1
D1
D1
D0
D0
D0
t
CSH
16
A1
A1
DATA PACKET (N)
DATA PACKET (N)
COMMAND
EXECUTED
t
CS1
t
CSW
OH
and V
OL