HFA3783 Datasheet, PDF (11/34 Pages) Intersil Corporation – I/Q Modulator/Demodulator and Synthesizer

HFA3783
PLL Synthesizer and DC Offset Clock Programming Table (Continued)
REGISTER
DEFINITION
SERIAL
BITS LSB 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 MSB
Operational 1
0 M(0) 0 M(2) M(3) M(4) M(5) M(6) M(7) M(8) 0
0
0
0 M(13) M(14) M(15) X X
Mode
Offset
1
Calibration
1 C(0) C(1) C(2) C(3) C(4) C(5) C(6) 0 0 0
0 C(11)
X (Don’t Care)
NOTES:
6. The Serial data is clocked on the Rising Edge of the serial clock, MSB first. The serial Interface is active when LE is LOW. The serial Data is
latched into defined registers on the rising edge of LE.
7. The M register or Operational Mode needs to be loaded first. Registers R, A/B and Offset Calibration follow M loading in any sequence.
Reference Frequency Counter/Divider
BIT
DESCRIPTION
R(0-14)
Least significant bit R(0) to most significant bit R(14) of the divide by R counter. The Reference signal frequency is divided down
by this counter and is compared with a divided LO by a phase detector.
LO Frequency Counters/Dividers
BIT
DESCRIPTION
A(0-6)
B(0-10)
Least significant bit A(0) to most significant bit A(6) of a 7-bit Swallow counter and LSB B(0) to MSB B(10) of the 11 bits divider.
The LO frequency is divided down by [P_*B+A], where P is the prescaler divider set by bit M(2). This divided signal frequency is
compared by a phase detector with the divided Reference signal.
Operational Modes
BIT
DESCRIPTION
M(0)
(PLL_PE), Phase Lock Loop Power Enable. 1 = Enable, 0 = Power Down. Serial port always on.
M(2)
Prescaler Select. 0 = 16/17, 1 = 32/33
M(3)
M(4)
Charge Pump Current Setting.
M(4)
0
M(3)
0
OUTPUT SINK/SOURCE
0.25mA
0
1
0.50mA
1
0
0.75mA
1
1
1.00mA
M(5)
M(6)
Charge Pump Sign.
M(7)
M(8)
M(13)
LD Pin Multiplex Operation.
M(6)
0
0
M(13)
0
0
M(5)
0
1
M(8)
0
1
Source Current if LO/ [P_*B+A] < Ref/R
Source Current if LO/ [P_*B+A] > Ref/R
M(7)
OUTPUT AT PIN LD
X
Lock Detect Operation
X
Short to GND
1
0
X
Serial Register Read Back
1
1
0
Ref. Divided by R Waveform
1
1
1
LO Divided by [P_*B+A]
Waveform
M(14)
M(15)
Charge Pump Operation/Test.
M(15)
0
M(14)
0
OPERATION/TEST
Normal Operation
0
1
Charge Pump Constant Current Source
1
0
Charge Pump Constant Current Sink
1
1
High Impedance State
11