Datasheet
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 50Ω 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
= 1.13kΩ, P
OUT
= 5dBm,
f
IN
= 70MHz, 50Ω 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
= 1.13kΩ, 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)
603510-15
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)
27024060 90 120 180150 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)
27024060 90 120 180150 210
35
30
25
20
15
10
5
0
40
30 300
GAIN vs. RF FREQUENCY (ALL STATES)
MAX2055 toc04
FREQUENCY (MHz)
GAIN (dB)
27024060 90 120 180150 210
-5
0
5
10
15
20
25
-10
30 300
GAIN vs. RF FREQUENCY
MAX2055 toc05
FREQUENCY (MHz)
GAIN (dB)
27024060 90 120 180150 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)
27024060 90 120 180150 210
12
14
16
18
20
22
24
10
30 300
V
CC
= 5.25V
V
CC
= 5.0V
V
CC
= 4.75V