AD9915 AD [Analog Devices], AD9915 Datasheet - Page 40

• Manufacturer Part Number: AD9915
• Description: 2.5 GSPS Direct Digital Synthesizer with 12-Bit DAC
• Manufacturer: AD [Analog Devices]

Register
Name (Serial
Address)
Profile 7 (P7)
USR0 (0x1B)
1
2
AD9915
A master reset is required after power up. The master reset returns the internal registers to their default values.
The DAC CAL enable bit must be manually set and then cleared after each power-up and every time REF CLK or the internal system clock is changed. This initiates an
internal calibration routine to optimize the setup and hold times for internal DAC timing. Failure to calibrate degrades ac performance or makes the part
nonfunctional.
Phase/
Amplitude
Register
(0x1A)
Bit Range
(Parallel
Address)
[7:0]
(0x68)
[15:8]
(0x69)
[23:16]
(0x6A)
[31:24]
(0x6B)
[7:0]
(0x6C)
[15:8]
(0x6D)
[23:16]
(0x6E)
[31:24]
(0x6F)
Bit 7
(MSB)
Reserved
Bit 6
CAL with
SYNC
Open
Bit 5
Requires register default value settings (0x08)
Requires register default value settings (0x00)
SYNC_OUT delay ADJ[2:0]
Rev. A | Page 40 of 48
Bit 4
Amplitude Scale Factor 7[7:0]
Phase Offset Word 7[15:8]
Phase Offset Word 7[7:0]
Open
Bit 3
Amplitude Scale Factor 7[11:8]
Bit 2
SYNC_IN delay ADJ[2:0]
Bit 1
Bit 0
(LSB)
PLL lock
Data Sheet
Default
Value
(Hex)
N/A
N/A
N/A
N/A
0x00
0x08
0x00
Read
only
1