AD5449 Analog Devices, AD5449 Datasheet - Page 6

• Manufacturer Part Number: AD5449
• Description: Dual 12-Bit, High Bandwidth Multiplying DAC with Serial Interface
• Manufacturer: Analog Devices

Specifications of AD5449

• Resolution (bits): 12bit
• Dac Update Rate: 2.47MSPS
• Dac Settling Time: 80ns
• Max Pos Supply (v): +5.5V
• Single-supply: Yes
• Dac Type: Current Out
• Dac Input Format: Ser,SPI

AD5429/AD5439/AD5449
SCLK
SYNC
SDIN
SDO
SYNC
SCLK
SDIN
SDO
NOTES
1. ALTERNATIVELY, DATA CAN BE CLOCKED INTO THE INPUT SHIFT REGISTER ON THE RISING EDGE OF SCLK AS
DETERMINED BY THE CONTROL BITS. IN THIS CASE, DATA WOULD BE CLOCKED OUT OF SDO ON THE FALLING
EDGE OF SCLK. TIMING IS AS ABOVE, WITH SCLK INVERTED.
t
4
DB15
DB15
(N)
t
5
INPUT WORD SPECIFIES
REGISTER TO BE READ
t
6
TO OUTPUT
UNDEFINED
Figure 5. Load Circuit for SDO Timing Specifications
PIN
Figure 4. Readback Mode Timing Diagram
t
2
Figure 3. Daisy-Chain Timing Diagram
50pF
C
L
200μA
200μA
t
1
Rev. D | Page 6 of 28
t
3
16
DB0
t
12
DB0
I
I
(N)
OL
OH
(N + 1)
DB15
DB15
(N)
DB15
DB15
V
OH
(MIN) + V
SELECTED REGISTER DATA
2
OL
(MAX)
CLOCKED OUT
NOP CONDITION
(N + 1)
DB0
DB0
(N)
t
7
32
DB0
DB0
t
8