Datasheet

MAX2037
Ultrasound Variable-Gain Amplifier
_______________________________________________________________________________________ 5
OVERLOAD RECOVERY TIME
MAX2037toc07
DIFFERENTIAL
OUTPUT
2.0V/div
DIFFERENTIAL
INPUT
2.0V/div
400ns/div
f = 5MHz
OUTPUT 100mV
P-P
TO OVERLOAD
AND BACK TO 100mV
P-P
-100
-90
-95
-80
-85
-75
-65
-70
-60
-15 5-5 15 25 35
CHANNEL-TO-CHANNEL CROSSTALK
vs. GAIN
MAX2037 toc08
GAIN (dB)
CROSSTALK (dB)
V
OUT
= 1.5V
P-P
DIFFERENTIAL
f = 10MHz, ADJACENT CHANNELS
-30
-110
1 10 100
CHANNEL-TO-CHANNEL CROSSTALK
vs. FREQUENCY
-90
-100
MAX2037toc09
FREQUENCY (MHz)
CROSSTALK (dB)
-70
-80
-60
-50
-40
V
OUT
= 1V
P-P
DIFFERENTIAL
GAIN = 10dB, ADJACENT CHANNELS
Typical Operating Characteristics (continued)
(Figure 2, V
CC
= V
REF
= 4.75V to 5.25V, V
GND
= 0, PD = 0, VG_CLAMP_MODE = 1, f
RF
= 5MHz, capacitance to GND at each of the
VGA differential outputs is 60pF, differential capacitance across the VGA outputs is 10pF, R
L
= 1kΩ, T
A
= 0°C to +70°C. Typical
values are at V
CC
= V
REF
= 5V, T
A
= +25°C, unless otherwise noted.)
-100
-80
-90
-60
-70
-40
-50
-30
-10
-20
0
-15 5-5 15 25 35
SECOND HARMONIC DISTORTION
vs. GAIN
MAX2037 toc04
GAIN (dB)
HD2 (dBc)
V
OUT
= 1V
P-P
DIFFERENTIAL
f = 12MHz
f = 2MHz
f = 5MHz
-100
-80
-90
-60
-70
-40
-50
-30
-10
-20
0
-15 5-5 15 25 35
THIRD HARMONIC DISTORTION
vs. GAIN
MAX2037 toc05
GAIN (dB)
HD3 (dBc)
V
OUT
= 1V
P-P
DIFFERENTIAL
f = 12MHz
f = 2MHz
f = 5MHz
OVERLOAD RECOVERY TIME
MAX2037toc06
DIFFERENTIAL
OUTPUT
1.0V/div
DIFFERENTIAL
INPUT
1.0V/div
400ns/div
f = 5MHz
OUTPUT 1V
P-P
TO OVERLOAD AND BACK TO 1V
P-P