AD6650/PCB Analog Devices Inc, AD6650/PCB Datasheet - Page 38

• Manufacturer Part Number: AD6650/PCB
• Description: BOARD EVAL FOR AD6650 W/SOFTWARE
• Manufacturer: Analog Devices Inc

Specifications of AD6650/PCB

• Rohs Status: RoHS non-compliant
• Module/board Type: Evaluation Board
• For Use With/related Products: AD6650

AD6650
Reg.
(Hex)
1B
1C
1D
1E
1F
20
21
22
23 to
3F
40 to
6F
70 to
FF
Mnemonic
RCF Taps (N
RCF Scale
BIST for A-I
BIST for A-Q
BIST for B-I
BIST for B-Q
Serial Control
AutoCalibration Control
Reserved
Coefficient Memory
Reserved
7: B Data Serial Ouput
8: Fine DCC Data to BIST
6 to 5: I_SDFS Control
4: SOWL
3: SBM
2 to 0: SDIV [2:0]
3: Reserved
2: Reserved
1: DAC Power-Down
Disable
0: Enable
Select
Taps
− 1)
Bit
Width
6
2
24
24
24
24
9
1
1
2
1
1
3
4
1
1
1
1
16-bit data available, I/DATA_I.
16-bit data available, Q/DATA_Q.
16-bit data available, I/DATA_I.
16-bit data available, Q/DATA_Q.
Data is available through the I/Q BIST
Port B data serial output select.
Serial port control functions.
Serial output word length.
Serial bus master.
New calibration sequence control registers.
Autocalibration enable.
Description
1 to 48.
0, −6 dB, −12 dB, and −18 dB gain adjust to
prevent coefficients from clipping the MAC.
Power-up value is 9’bxxxxx0xxx for Bit 3 to
make it a serial slave.
registers when Bit 8 is high.
Serial divider.
Power-up value is 4’b0000.
Reserved.
Reserved.
Power down VGA DACs during the power-up
sequence to calibrate the dc offset.
Common coefficients for Channel A and
Channel B.
Rev. A | Page 38 of 44
Additional Information
Code
0
1
.
.
46
47
Code
0
1
2
3
Code
0
1
0
1
2
3
0
1
0
1
0
.
.
7
Must be written 0
Must be written 1
Code
0
1
0
1
48 × 20 bit RAM
Taps
1
2
.
.
47
48
Scale Factor
−18 dB
−12 dB
−6 dB
0 dB
Results
Use SDO0 for
B data
Use SDO1 for
B data
AI pulse
AI, BI pulses
AI, AQ, BI,
BQ pulses
High for
SDO0 valid
16-bit words
24-bit words
Serial slave
Serial bus
master
Divide-by-1
.
.
Divide-by-8
Results
Power down
DACs
DACs on
Disabled
Enabled