GP214D Datasheet, PDF (5/15 Pages) List of Unclassifed Manufacturers – 1.4GHz DUAL PLL

GP214D
1.4GHz DUAL PLL
OPTIONAL CONTROL
The control register enables various functions shown in the table below.
LSB
Channel 1
Channel 2
MSB
Bit1 Bit2 Bit3 Bit4 Bit5 Bit6 Bit7 Bit8 Bit9 Bit10 Bit11 Bit12 Bit13 Bit14
T
Test
Mode
CP
Charge
Pump
Polarity
CP1 CP2
Charge Pump
Output Current
SB1
Ch 1
Standby
CP1 CP2
Charge Pump
Output Current
SB2
Ch2
Standby
SBR
Ref.
Divider
Standby
LD1 LD2
Lock
Detector
SW
Filter
Switch
GC2 GC1
Group Code
“0”, “0”
▪ Test mode selection (T)
H: test mode, L: normal mode
▪ Output polarity of charge pump (CP)
CP is set to “0” at normal and changed to “1” when reverse operation, according to the dependence of
VCO output frequency upon VCO input voltage. “Normal” denotes proportional response in the frequency
to the VCO input voltage.
▪ Charge pump output current (CP1 and CP2)
Charge pump employs circuits characterized by constant output current. The output current can be
selected for the best performance.
Control Bits
CP1
CP2
0
0
0
1
1
0
1
1
Charge Pump
Output Current
±1600µA
±200µA
±400µA
±800µA
Version 1.2 (Jan. 2006)
5
GAINTECH INCORPORATED