Rainbow Electronics MAX3580 - Manual (Page 7)

MAX3580
Direct-Conversion TV Tuner
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70
80
100
90
110
150 170 180 190 200 160 210 220 230 240 250
VHF-III BAND VOLTAGE GAIN
vs. FREQUENCY
MAX3580 toc01
FREQUENCY (MHz)
GAIN (dB)
T
A
= +25 °C
T A = 0 °C
T A = +85 °C T A = +55 °C
70
80
100
90
110
450 550 600 650 700 500 750 800 850 900
UHF BAND VOLTAGE GAIN
vs. FREQUENCY
MAX3580 toc02
FREQUENCY (MHz)
GAIN (dB)
T A = +25 °C
T A = 0 °C
T A = +85 °C
T A = +55 °C
10
40
30
20
50
60
70
80
90
100
110
0 1.0 0.5 1.5 2.0 2.5 3.0
VOLTAGE GAIN
vs. RF_AGC CONTROL VOLTAGE
MAX3580 toc03
RF_AGC CONTROL VOLTAGE (V)
GAIN (dB)
T
A
= +25 °C, +55°C
T A = -40 °C
T A = +85 °C
BB_AGC = 2.85V
-120
-100
-110
-80
-90
-60
-70
-50
PHASE NOISE vs. OFFSET FREQUENCY
MAX3580 toc04
OFFSET FREQUENCY (kHz)
PHASE NOISE (dBm/Hz)
0.1 1 10 100 1000
620MHz
220MHz
NOISE FIGURE vs. VHF FREQUENCY
FREQUENCY (MHz)
NOISE FIGURE (dB)
MAX3580 toc05
150 175 200 225 250
0
5
10
15
20
T A = -40 °C T A = +25 °C
T
A
= +55 °C
T A = +85 °C
0
5
15
10
20
450 550 600 650 700 500 750 800 850 900
NOISE FIGURE vs. UHF FREQUENCY
MAX3580 toc06
FREQUENCY (MHz)
NOISE FIGURE (dB)
T A = +25 °C
T A = -40 °C
T A = +85 °C
T A = +55 °C
Typical Operating Characteristics
(Typical values are at V CC = +3.3V, T A = +25°C, unless otherwise noted.)
0
10
5
20
15
25
30
VHF MODE NOISE FIGURE
vs. VOLTAGE GAIN
MAX3580 toc07
VOLTAGE GAIN (dB)
NOISE FIGURE (dB)
60 70 75 65 80 85 90
T
A
= +25 °C, +55°C
T A = -40 °C
T A = +85 °C
f RF = 220MHz
BB_AGC = 2.85V