MAX2038(2009) Ver la hoja de datos (PDF) - Maxim Integrated
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MAX2038 Datasheet PDF : 23 Pages
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Ultrasound VGA Integrated
with CW Octal Mixer
Typical Operating Characteristics (continued)
(Figure 7, VCC = VREF = 4.75V to 5.25V, VGND = 0, PD = 0, VG_CLAMP_MODE = 1, fRF = 5MHz, capacitance to GND at each of the
VGA differential outputs is 60pF, differential capacitance across the VGA outputs is 10pF, RL = 1kΩ, TA = 0°C to +70°C. Typical
values are at VCC = VREF = 5V, TA = +25°C, unless otherwise noted.)
LARGE-SIGNAL BANDWIDTH
vs. FREQUENCY
0
VOUT = 0.5VP-P DIFFERENTIAL
-5 VG_CTL = +2VP-P DIFFERENTIAL
-10
-15
-20
-25
-30
-35
-40
0.1
1
10
100
1000
FREQUENCY (MHz)
HARMONIC DISTORTION
vs. DIFFERENTIAL OUTPUT VOLTAGE
0
VOUT = 1VP-P DIFFERENTIAL
-10 f = 5MHz, GAIN = 10dB
-20
-30
THIRD HARMONIC
-40
-50
-60
-70
-80
SECOND HARMONIC
-90
-100
0
0.5 1.0 1.5 2.0 2.5 3.0
DIFFERENTIAL OUTPUT VOLTAGE (VP-P)
HARMONIC DISTORTION
vs. DIFFERENTIAL OUTPUT LOAD RESISTANCE
-40
-45
VOUT = 1VP-P DIFFERENTIAL
f = 5MHz, GAIN = 10dB
-50
-55
-60
THIRD HARMONIC
-65
-70
-75
SECOND HARMONIC
-80
-85
-90
-95
-100
200 500 800 1100 1400 1700 2000
DIFFERENTIAL OUTPUT LOAD (Ω)
HARMONIC DISTORTION
vs. DIFFERENTIAL OUTPUT LOAD CAPACITANCE
-40
-45
VOUT = 1VP-P DIFFERENTIAL
f = 5MHz, GAIN = 10dB
-50
-55
THIRD HARMONIC
-60
-65
-70
-75
-80
SECOND HARMONIC
-85
-90
-95
-100
5
25
45
65
85 105
DIFFERENTIAL OUTPUT LOAD (pF)
HARMONIC DISTORTION
vs. FREQUENCY
0
-10
VOUT = 1VP-P DIFFERENTIAL
GAIN = 10dB
-20
-30
THIRD HARMONIC
-40
-50
-60
-70
SECOND HARMONIC
-80
-90
-100
0
10
20
30
40
50
FREQUENCY (MHz)
TWO-TONE ULTRASOUND-SPECIFIC IMD3
vs. FREQUENCY
0
VOUT = 1VP-P DIFFERENTIAL
-10 GAIN = 10dB
-20
-30
-40
-50
-60
-70
0
5
10
15
20
25
FREQUENCY (MHz)
GAIN ERROR HISTOGRAM
50
SAMPLE SIZE = 202 UNITS,
45 fIN_ = 5MHz, GAIN = 10dB
40
35
30
25
20
15
10
5
0
GAIN ERROR (dB)
OUTPUT COMMON-MODE OFFSET VOLTAGE
vs. GAIN
20
15
10
5
0
-5
-10
-15
-20
-15
-5
5
15
25
35
GAIN (dB)
DIFFERENTIAL OUTPUT IMPEDANCE
MAGNITUDE vs. FREQUENCY
200
180
160
140
120
100
80
60
0.1
1
10
100
FREQUENCY (MHz)
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