Datasheet
LTC6946
2
6946fa
PIN CONFIGURATION ABSOLUTE MAXIMUM RATINGS
Supply Voltages
V
+
(V
REF
+
, V
REFO
+
, V
RF
+
, V
D
+
) to GND ..................3.6V
V
CP
+
, V
VCO
+
to GND .............................................5.5V
Voltage on CP Pin .................GND – 0.3V to V
CP
+
+ 0.3V
Voltage on All Other Pins ..........GND – 0.3V to V
+
+ 0.3V
Operating Case Temperature Range (T
C
)
(Note 2) .................................................. –40°C to 105°C
Operating Junction Temperature ........................... 125°C
Storage Temperature Range .................. –65°C to 150°C
(Note 1)
9 10
TOP VIEW
29
GND
UFD PACKAGE
28-LEAD (4mm s 5mm) PLASTIC QFN
11 12 13
28 27 26 25 24
14
23
6
5
4
3
2
1
V
REFO
+
REFO
STAT
CS
SCLK
SDI
SDO
V
D
+
V
VCO
+
GND
CM
A
CM
B
CM
C
GND
TB
TUNE
REF
–
REF
+
V
REF
+
CP
V
CP
+
GND
MUTE
GND
RF
–
RF
+
V
RF
+
BB
7
17
18
19
20
21
22
16
8
15
T
JMAX
= 125°C, θ
JC
= 7°C/W,
EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION CASE TEMPERATURE RANGE
LTC6946IUFD-1#PBF LTC6946IUFD-1#TRPBF 69461
28-Lead (4mm × 5mm) Plastic QFN
–40°C to 105°C
LTC6946IUFD-2#PBF LTC6946IUFD-2#TRPBF 69462
28-Lead (4mm × 5mm) Plastic QFN
–40°C to 105°C
LTC6946IUFD-3#PBF LTC6946IUFD-3#TRPBF 69463
28-Lead (4mm × 5mm) Plastic QFN
–40°C to 105°C
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
AVAILABLE OPTIONS
VCO FREQUENCY
RANGE (GHz)
PACKAGE STYLE OUTPUT FREQUENCY RANGE vs OUTPUT DIVIDER SETTING (GHz)
QFN-28 (UFD28) 0 DIV = 6 0 DIV = 5 0 DIV = 4 0 DIV = 3 0 DIV = 2 0 DIV = 1
2.240 to 3.740 LTC6946IUFD-1 0.373 to 0.623 0.448 to 0.748 0.560 to 0.935 0.747 to 1.247 1.120 to 1.870 2.240 to 3.740
3.080 to 4.910 LTC6946IUFD-2 0.513 to 0.818 0.616 to 0.982 0.770 to 1.228 1.027 to 1.637 1.540 to 2.455 3.080 to 4.910
3.840 to 5.790 LTC6946IUFD-3 0.640 to 0.965 0.768 to 1.158 0.960 to 1.448 1.280 to 1.930 1.920 to 2.895 3.840 to 5.790
Overlapping Frequency Bands