Typical operating characteristics, Ac electrical characteristics (continued) – Rainbow Electronics MAX2055 User Manual
Page 3
MAX2055
Digitally Controlled, Variable-Gain, Differential
ADC Driver/Amplifier
_______________________________________________________________________________________
3
Note 1: Guaranteed by design and characterization.
Note 2: All limits reflect losses of external components. Output measurements are taken at RF_OUT using the application circuit
shown in Figure 1.
Note 3: The amplitude and phase unbalance are tested with 50
Ω resistors connected from OUT+/OUT- to GND.
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Gain Flatness Over 50MHz
Bandwidth
Peak-to-peak for all settings
0.5
dB
Attenuator Switching Time
50% control to 90% RF
40
ns
Input Return Loss
f
R
= 30MHz to 300MHz, all gain conditions
15
dB
f
R
= 30MHz to 250MHz, all gain conditions
15
Output Return Loss
f
R
= 250MHz to 300MHz, all gain conditions
12
dB
AC ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1; V
CC
= +4.75V to +5.25V, GND = 0V, max gain (B0 = B1 = B2 = B3 = B4 = 0), R
1
= 1.13k
Ω, P
OUT
= 5dBm,
f
IN
= 70MHz, 50
Ω system impedance. Typical values are at V
CC
= +5V and T
A
= +25°C, unless otherwise noted.) (Notes 1, 2)
Typical Operating Characteristics
(Circuit of Figure 1, V
CC
= 5.0V, R
1
= 1.13k
Ω, max gain (B0 = B1 = B2 = B3 = B4 = 0), P
OUT
= 5dBm, T
A
= +25°C, unless other-
wise noted.)
SUPPLY CURRENT vs. TEMPERATURE
MAX2055 toc01
TEMPERATURE (
°C)
SUPPLY CURRENT (mA)
60
35
10
-15
220
230
240
250
260
270
210
-40
85
V
CC
= 5.25V
V
CC
= 5.0V
V
CC
= 4.75V
INPUT RETURN LOSS vs. RF FREQUENCY
(ALL STATES)
MAX2055 toc02
FREQUENCY (MHz)
INPUT RETURN LOSS (dB)
270
240
60
90 120
180
150
210
35
30
25
20
15
10
5
0
40
30
300
OUTPUT RETURN LOSS vs. RF FREQUENCY
(ALL STATES)
MAX2055 toc03
FREQUENCY (MHz)
OUTPUT RETURN LOSS (dB)
270
240
60
90 120
180
150
210
35
30
25
20
15
10
5
0
40
30
300
GAIN vs. RF FREQUENCY (ALL STATES)
MAX2055 toc04
FREQUENCY (MHz)
GAIN (dB)
270
240
60
90 120
180
150
210
-5
0
5
10
15
20
25
-10
30
300
GAIN vs. RF FREQUENCY
MAX2055 toc05
FREQUENCY (MHz)
GAIN (dB)
270
240
60
90 120
180
150
210
12
14
16
18
20
22
24
10
30
300
T
A
= +85
°C
T
A
= +25
°C
T
A
= -40
°C
GAIN vs. RF FREQUENCY
MAX2055 toc06
FREQUENCY (MHz)
GAIN (dB)
270
240
60
90 120
180
150
210
12
14
16
18
20
22
24
10
30
300
V
CC
= 5.25V
V
CC
= 5.0V
V
CC
= 4.75V