AD6650ABCZ Analog Devices Inc, AD6650ABCZ Datasheet - Page 38

• Manufacturer Part Number: AD6650ABCZ
• Description: DIVERSITY IF-TO-BASEBAND GSM/EDGE NARROW-BAND RECEIVER
• Manufacturer: Analog Devices Inc

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