AD9915 AD [Analog Devices], AD9915 Datasheet - Page 37

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

Data Sheet
Register
Name (Serial
Address)
Digital Ramp
Rising Digital
Falling Digital
Digital Ramp
Lower
Upper
Profile 0 (P0)
Upper
Limit
Register
(0x05)
Ramp Step
Size
Register
(0x06)
Ramp Step
Size
Register
(0x07)
Rate
Register
(0x08)
Frequency
Jump
Register
(0x09)
Frequency
Jump
Register
(0x0A)
Frequency
Tuning
Word 0
Register
(0x0B)
Bit Range
(Parallel
Address)
[7:0]
(0x14)
[15:8]
(0x15)
[23:16]
(0x16)
[31:24]
(0x17)
[7:0]
(0x18)
[15:8]
(0x19)
[23:16]
(0x1A)
[31:24]
(0x1B)
[7:0]
(0x1C)
[15:8]
(0x1D)
[23:16]
(0x1E)
[31:24]
(0x1F)
[7:0]
(0x20)
[15:8]
(0x21)
[23:16]
(0x22)
[31:24]
(0x23)
[7:0]
(0x24)
[15:8]
(0x25)
[23:16]
(0x26)
[31:24]
(0x27)
[7:0]
(0x28)
[15:8]
(0x29)
[23:16]
(0x2A)
[31:24]
(0x2B)
[7:0]
(0x2C)
[15:8]
(0x2D)
[23:16]
(0x2E)
[31:24]
(0x2F)
Bit 7
(MSB)
Bit 6
Bit 5
Falling digital ramp decrement step size[23:16]
Falling digital ramp decrement step size[31:24]
Falling digital ramp decrement step size[15:8]
Rising digital ramp increment step size[23:16]
Rising digital ramp increment step size[31:24]
Rising digital ramp increment step size[15:8]
Falling digital ramp decrement step size[7:0]
Rising digital ramp increment step size[7:0]
Rev. A | Page 37 of 48
Digital ramp negative slope rate[15:8]
Digital ramp positive slope rate[15:8]
Digital ramp negative slope rate[7:0]
Digital ramp positive slope rate[7:0]
Lower frequency jump point[23:16]
Lower frequency jump point[31:24]
Upper frequency jump point[23:16]
Upper frequency jump point[31:24]
Lower frequency jump point[15:8]
Upper frequency jump point[15:8]
Bit 4
Lower frequency jump point[7:0]
Upper frequency jump point[7:0]
Frequency Tuning Word 0[23:16]
Frequency Tuning Word 0[31:24]
Frequency Tuning Word 0[15:8]
Digital ramp upper limit[23:16]
Digital ramp upper limit[31:24]
Frequency Tuning Word 0[7:0]
Digital ramp upper limit[15:8]
Digital ramp upper limit[7:0]
Bit 3
Bit 2
Bit 1
Bit 0
(LSB)
AD9915
Default
Value
(Hex)
0x00
0x00
0x00
0x00
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
1