Typical operating characteristics (continued) – Rainbow Electronics MAX2062 User Manual
Page 7
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MAX2062
Dual 50MHz to 1000MHz High-Linearity,
Serial/Parallel-Controlled Analog/Digital VGA
Typical Operating Characteristics (continued)
(Typical Application Circuit, V
CC
= V
CC_AMP_1
= V
CC_AMP_2
= V
CC_RG
= 5.0V, attenuators are set for maximum gain, RF ports are
driven from 50I sources, AMPSET = 0, PD_1 = PD_2 = 0, P
IN
= -20dBm, f
RF
= 350MHz, and T
C
= +25NC, unless otherwise noted.)
GAIN OVER DIGITAL ATTENUATOR
SETTING vs. RF FREQUENCY
MAX2062 toc04
RF FREQUENCY (MHz)
GAIN OVER DIGITAL ATTENUATOR SETTING (dB)
850
650
450
250
-8
2
12
22
-18
50
1050
DIGITAL ATTENUATOR RELATIVE
ERROR vs. RF FREQUENCY
MAX2062 toc05
RF FREQUENCY (MHz)
RELATIVE ERROR (dB)
850
650
250
450
-0.75
-0.50
-0.25
0
0.50
0.25
0.75
1.00
-1.00
50
1050
ERROR FROM 23dB TO 24dB
DIGITAL ATTENUATOR ABSOLUTE
ERROR vs. RF FREQUENCY
MAX2062 toc06
RF FREQUENCY (MHz)
ABSOLUTE ERROR (dB)
850
650
250
450
-0.75
-0.50
-0.25
0
0.50
0.25
0.75
1.00
-1.00
50
1050
INPUT MATCH OVER DIGITAL ATTENUATOR
SETTING vs. RF FREQUENCY
MAX2062 toc07
RF FREQUENCY (MHz)
0dB
INPUT MATCH OVER DIGITAL ATTENUATOR SETTING (dB)
800
600
400
200
-40
-30
-20
-10
0
-50
0
1000
1dB
31dB
4dB
2dB
8dB, 16dB
OUTPUT MATCH OVER DIGITAL
ATTENUATOR SETTING vs. RF FREQUENCY
MAX2062 toc08
RF FREQUENCY (MHz)
OUTPUT MATCH OVER DIGITAL ATTENUATOR SETTING (dB)
800
600
400
200
-40
-30
-20
-10
0
-50
0
1000
0dB, 1dB, 4dB, 8dB
16dB, 31dB
2dB
CHANNEL-TO-CHANNEL ISOLATION
vs. RF FREQUENCY
MAX2062 toc09
RF FREQUENCY (MHz)
CHANNEL-TO-CHANNEL ISOLATION (dB)
850
650
450
250
70
60
50
40
30
20
80
50
1050
BOTH DIGITAL ATTENUATORS = 31dB
BOTH DIGITAL ATTENUATORS = 0dB
BOTH ANALOG ATTENUATORS = 0dB
REVERSE ISOLATION OVER DIGITAL
ATTENUATOR SETTING vs. RF FREQUENCY
MAX2062 toc10
RF FREQUENCY (MHz)
REVERSE ISOLATION OVER DIGITAL
ATTENUATOR SETTING (dB)
850
650
450
250
70
60
50
40
30
80
50
1050
DIGITAL ATTENUATOR 31dB
DIGITAL ATTENUATOR 0dB
DIGITAL ATTENUATOR PHASE CHANGE
BETWEEN STATES vs. RF FREQUENCY
MAX2062 toc11
RF FREQUENCY (MHz)
DIGITAL ATTENUATOR PHASE CHANGE
BETWEEN STATES (DEGREES)
850
650
250
450
-20
-10
0
10
30
20
40
50
-30
50
1050
REFERENCED TO HIGH GAIN STATE
POSITIVE PHASE = ELECTRICALLY SHORTER
GAIN OVER ANALOG ATTENUATOR
SETTING vs. RF FREQUENCY
MAX2062 toc12
RF FREQUENCY (MHz)
GAIN OVER ANALOG ATTENUATOR SETTING (dB)
850
650
250
450
-13
-8
-3
2
12
7
17
22
-18
50
1050
DAC CODE 0
DAC CODE 255
DAC CODE 32
DAC CODE 128
DAC CODE 64