Linear Technology DC1774A-C Demo Manual

DESCRIPTION
Demonstration circuit 1774A-C features the LTC
gain block amplifier. The LTC6431-15 has a power gain of
15.5dB and it is part of the LTC643X-YY amplifier series.
DC1774A-C is part of the DC1774A demo boards fam-
ily supporting the LTC643X-YY family. The demo board
DC1774A-C is optimized for a frequency range from
100MHz to 1200MHz. It incorporates a minimum of
passive support components to configure the amplifier
PERFORMANCE SUMMARY
SYMBOL PARAMETER
Power Supply
V Operating Supply Range
CC
I Current Consumption
CC
POWER GAIN
FREQUENCY S21
(MHz) (dB)
100 15.1
200 15.4
240 15.6
300 15.5
400 15.5
500 15.4
600 15.3
700 15.2
800 15.0
900 14.8
1000 14.7
1100 14.5
1200 14.3
Notes: All figures are referenced to J7 (Input Port) and J10 (Output Port).
1. Two-tone test condition: Output power level = +2dBm/tone; Tone spacing = 1MHz.
2. Single-tone test condition: Output power level = +6dBm.
3. Small signal noise figure.
® 6431-15
Specifications are at T
OUTPUT OUTPUT
THIRD-ORDER THIRD-ORDER
1
INTERCEPT POINT INTERMODULATION
OIP3 OIM3
(dBm) (dBc)
46.6 –89.2
46.7 –89.5
46.7 –89.3
46.6 –89.3
46.1 –88.3
45.3 –86.6
43.5 –83.1
42.2 –80.4
41.1 –78.1
39.5 –74.9
38.7 –73.3
38.0 –71.9
38.0 –71.9
DEMO MANUAL DC1774A-C
50Ω Gain Block IF Amplifier
for various applications. The LTC6431-15 provides 50Ω
single-ended input and output impedance so that it can
be easily evaluated with most RF test equipment.
Design files for this circuit board are available at
http://www.linear.com/demo
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
= 25°C, V = 5V
A CC
CONDITIONS
All V Pins Plus +OUT
CC
Total Current
SECOND THIRD
HARMONIC HARMONIC
1 2
DISTORTION DISTORTION
HD2 HD3
(dBc) (dBc)
–58.0 –88.0
–58.0 –88.0
–59.0 –88.0
–60.0 –86.0
–57.0 –87.0
–55.6 –77.0
–53.6 –69.0
–51.9 –69.0
–49.2 –65.0
–46.7 –63.0
–45.0 –59
–40.8 –56.8
–38.4 –54.2
LTC6431-15
VALUE/UNIT
4.75V to 5.25V
90mA
OUTPUT 1dB
COMPRESSION
2
POINT NOISE FIGURE
P1dB NF
(dBm) (dB)
20.0 3.8
20.0 3.5
20.3 3.4
20.1 3.5
20.3 3.5
20.3 3.6
20.4 3.7
20.2 3.8
20.1 4.0
19.7 4.2
19.3 4.2
18.8 4.4
18.6 4.6
dc1774acf
3
1