AD9785 Analog Devices, AD9785 Datasheet - Page 43

• Manufacturer Part Number: AD9785
• Description: Dual 12-Bit 800 MSPS DAC with Low Power 32-Bit Complex NCO
• Manufacturer: Analog Devices

Specifications of AD9785

• Resolution (bits): 12bit
• Dac Update Rate: 800MSPS
• Dac Settling Time: n/a
• Max Pos Supply (v): +3.47V
• Single-supply: No
• Dac Type: Current Out
• Dac Input Format: Par

(PIN 13, PIN 14)
TXENABLE
(PIN 39)
SYNC_I
GENERATOR
SYSTEM CLOCK
PULSE
DELAY [4:0]
SYNC_I
GENERATOR
ENABLE
SYNC_I
RESET
RESET
Δ
ACCUMULATOR
t
NCO PHASE
Figure 60. Synchronization Receive Circuitry Block Diagram
Figure 61. Multichip Synchronization in Pulse Mode
CLOCK DRIVER
CLOCK DRIVER
TRANSMIT
PATH
LOW SKEW
LOW SKEW
NCO
DEMODULATOR
Rev. A | Page 43 of 64
PULSE MODE
SYNC ERROR
DETECTOR
DETECTOR
ENABLE
EDGE
CODE
MATCHED
LENGTH TRACES
MATCHED
LENGTH TRACES
PN CODE MODE ENABLE
CORRELATE
THRESHOLD [4:0]
SYNC TIMING
ERROR IRQ
STATE [3:0]
CLOCK
STATE
REFCLK
TXENABLE
SYNC_I
REFCLK
TXENABLE
SYNC_I
GENERATION
DACCLK
CLOCK
LD-STATE
0
1
AD9785/AD9787/AD9788
SYNC MODE
SELECT
•
•
•
INTERNAL
CLOCKS
OUT
OUT