Max3580 direct-conversion tv tuner, Typical operating characteristics (continued) – Rainbow Electronics MAX3580 User Manual
Page 9
MAX3580
Direct-Conversion TV Tuner
_______________________________________________________________________________________
9
-45
-55
-65
-75
0
20
10
30
40
50
STOPBAND NOISE vs. FREQUENCY
MAX3580 tpc15
FREQUENCY (MHz)
STOPBAND NOISE (dBm)
BB_BW <3:0> = "1011"
8MHz CHANNEL MODE
BB_BW <3:0> = "1001"
7MHz CHANNEL MODE
0
10
5
20
15
25
30
VHF MODE NOISE FIGURE
vs. BB_AGC VOLTAGE
MAX3580 toc16
BB_AGC VOLTAGE (V)
NOISE FIGURE (dB)
0
1.0
1.5
0.5
2.0
2.5
3.0
T
A
= +25
°C
T
A
= +55
°C
T
A
= -40
°C
T
A
= +85
°C
220MHz
RF_AGC = 2.85V
0
10
5
20
15
25
30
UHF MODE NOISE FIGURE
vs. BB_AGC VOLTAGE
MAX3580 toc17
BB_AGC VOLTAGE (V)
NOISE FIGURE (dB)
0
1.0
1.5
0.5
2.0
2.5
3.0
620MHz
RF_AGC = 2.85V
T
A
= +25
°C
T
A
= -40
°C
T
A
= +55
°C
T
A
= +85
°C
0
10
5
15
30
35
25
20
40
100
300 400 500 600
200
700 800 900 1000
RF PORT-TO-PORT ISOLATION
MAX3580 toc18
FREQUENCY (MHz)
GAIN (dB)
RFIN2 TO RFIN
RFIN TO RFIN2
4
3
2
1
0
-60
-30
-50
-40
-20
-10
0
POWER-DETECTOR OUTPUT VOLTAGE
vs. RF INPUT POWER
MAX3580 tpc19
RF INPUT POWER (dBm)
POWER-DETECTOR OUTPUT VOLTAGE (V)
10k
Ω PULLUP TO 3.0V
"111"
"000"
0
-5
-10
-15
450
675
525
600
750
825
900
RF INPUT RETURN LOSS
vs. UHF FREQUENCY
MAX3580 toc20
UHF FREQUENCY (MHz)
RETURN LOSS (dB)
Zo = 75
Ω
Typical Operating Characteristics (continued)
(Typical values are at V
CC
= +3.3V, T
A
= +25°C, unless otherwise noted.)
0
-5
-10
-15
-20
150
200
175
225
250
RF INPUT RETURN LOSS
vs. VHF FREQUENCY
MAX3580 toc21
VHF FREQUENCY (MHz)
RETURN LOSS (dB)
Zo = 75
Ω
200
195
190
185
3.0
3.3
3.1
3.2
3.4
3.5
3.6
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX3580 toc22
V
CC
(V)
I
CC
(mA)
T
A
= +55
°C
T
A
= +85
°C
T
A
= -40
°C
T
A
= 0
°C
T
A
= +25
°C