MAX2037 Maxim Integrated Products, MAX2037 Datasheet - Page 7

• Manufacturer Part Number: MAX2037
• Description: Ultrasound Variable Gain Amplifier
• Manufacturer: Maxim Integrated Products

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(Figure 2, V
VGA differential outputs is 60pF, differential capacitance across the VGA outputs is 10pF, R
values are at V
-100
-40
-45
-50
-55
-60
-65
-70
-75
-80
-85
-90
-95
vs. DIFFERENTIAL OUTPUT LOAD RESISTANCE
200
V
f = 5MHz, GAIN = 10dB
OUT
CC
500
= 1V
DIFFERENTIAL OUTPUT LOAD (Ω)
HARMONIC DISTORTION
CC
= V
P-P
800
DIFFERENTIAL
= V
-10
-20
-30
-40
-50
-60
-70
-10
-15
-20
REF
20
15
10
-5
0
5
0
OUTPUT COMMON-MODE OFFSET VOLTAGE
_______________________________________________________________________________________
-15
TWO-TONE ULTRASOUND-SPECIFIC IMD3
REF
0
1100
= 4.75V to 5.25V, GND = 0V, PD = 0, VG_CLAMP_MODE = 1, f
V
GAIN = 10dB
OUT
SECOND HARMONIC
= 5V, T
THIRD HARMONIC
= 1V
1400
-5
5
P-P
vs. FREQUENCY
DIFFERENTIAL
FREQUENCY (MHz)
A
1700
10
= +25°C, unless otherwise noted.)
vs. GAIN
5
GAIN (dB)
Ultrasound Variable-Gain Amplifier
2000
15
15
-100
20
25
-40
-45
-50
-55
-60
-65
-70
-75
-80
-85
-90
-95
vs. DIFFERENTIAL OUTPUT LOAD CAPACITANCE
Typical Operating Characteristics (continued)
5
V
f = 5MHz, GAIN = 10dB
OUT
25
35
= 1V
DIFFERENTIAL OUTPUT LOAD (pF)
25
HARMONIC DISTORTION
P-P
DIFFERENTIAL
45
SECOND HARMONIC
65
THIRD HARMONIC
200
180
160
140
120
100
80
60
50
45
40
35
30
25
20
15
10
5
0
85
0.1
SAMPLE SIZE = 202 UNITS,
f
IN_
DIFFERENTIAL OUTPUT IMPEDANCE
= 5MHz, GAIN = 10dB
MAGNITUDE vs. FREQUENCY
105
GAIN ERROR HISTOGRAM
RF
= 5MHz, capacitance to GND at each of the
FREQUENCY (MHz)
1
GAIN ERROR (dB)
-100
-10
-20
-30
-40
-50
-60
-70
-80
-90
L
0
= 1kΩ, T
0
V
GAIN = 10dB
OUT
10
= 1V
10
HARMONIC DISTORTION
P-P
A
vs. FREQUENCY
DIFFERENTIAL
FREQUENCY (MHz)
= 0°C to +70°C. Typical
20
100
SECOND HARMONIC
30
THIRD HARMONIC
40
50
7