Linear Technology LTC6957HMS-2 Demoboard: Low Phase Noise, Dual Output Buffer/Driver/Logic Converter with LVDS Outputs D DC1765A-B Data Sheet
Product codes
DC1765A-B
LTC6957-1/LTC6957-2/
LTC6957-3/LTC6957-4
36
6957f
For more information
www.linear.com/LTC6957-1
LINEAR TECHNOLOGY CORPORATION 2013
LT 0313 • PRINTED IN USA
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
Typical applicaTion
relaTeD parTs
PART NUMBER
DESCRIPTION
COMMENTS
4ns, 150MHz Dual Comparator
General Purpose Comparator with Flexible Supply Voltages
16-Bit, 160Msps ADC
High Speed and High Resolution Requires Low Phase Noise Clocks
40MHz to 900MHz Quadrature Demodulator
24dBm IIP3 at 240MHz, 9dB NF, 4dB Conversion Gain
5MHz to 1600MHz Direct I/Q Modulator
27.7dBm OIP3 at 140MHz, –160dBm/Hz, –50.4dBc Image Rejection, –55dBm
Carrier Suppression
350MHz to 6GHz PLL Synthesizer
Integer-N PLL, –226dBc/Hz Normalized In-Band Phase Noise Floor
373MHz to 3.74GHz PLL + VCO
Integer-N PLL, –157dBc/Hz Wideband Output Phase Noise Floor, –226dBc/Hz
Normalized In-Band Phase Noise Floor, < –100dBc Spurious Output
513MHz to 4.91GHz PLL + VCO
640MHz to 5.79GHz PLL + VCO
10MHz Frequency Reference Input Stage with Dual CMOS Outputs
10MHz REFERENCE INPUT POWER
WITH REFERENCE TO 50Ω (dBm)
–10
–170
PHASE NOISE AT 100kHz OFFSET (dBc
/Hz)
–165
–160
–155
–140
–8 –6 –4 –2 0
2
4
6
8
69571234 TA03b
–145
–150
10
FILTA = L, FILTB = L
FILTA = H, FILTB = L
FILTA = L, FILTB = H
FILTA = H, FILTB = H
OPTIMUM FILT SETTINGS
6957 TA03a
LTC6957-3
12
11
10
9
8
7
FILTA
V
+
IN
+
IN
–
GND
FILTB
SD1OUT
V
DD
OUT1
OUT2
GNDOUT
SD2
1
2
3
4
5
6
R1
100Ω
R1
100Ω
HSMS-281C
COILCRAFT
WBC16-1T
3.3V
3.3V
•
•
0.1µF
0.1µF
0.1µF
0.1µF
R2
604k
10MHz
REF IN
–10dBm to
24dBm
0.1µF
CMOS OUT1,
10MHz
CMOS OUT2,
CMOS OUT2,
10MHz
TO PHASE NOISE MEASUREMENT
0.1µF
FILTB
FILTA
100Ω
0.1µF
100Ω
Additive Phase Noise
vs Input Amplitude