MAX2078CTK(2009) 查看數據表（PDF） - Maxim Integrated
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MAX2078CTK Datasheet PDF : 25 Pages
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Octal-Channel Ultrasound Front-End
with CW Doppler Mixers
Typical Operating Characteristics (continued)
(Typical Application Circuit, VREF = 2.475V to 2.525V, VCC1 = 3.13V to 3.47V, VCC2 = 4.5V to 5.25V, TA = 0°C to +70°C, VGND = 0V,
NP = 0, PD = 0, CLP = 0, D43/D42/D41/D40 = 1/0/1/0 (RIN = 200Ω, LNA gain = 18.5dB), D45/D44 = 1/1(fC = 18MHz), fRF = fLO/16 =
5MHz, capacitance to GND at each of the VGA differential outputs is 25pF, differential capacitance across VGA outputs is 15pF,
RL = 1kΩ differential, RS = 200Ω, CI_, CQ_ pulled up to 11V through four separate 0.1% 162Ω resistors, the rise/fall time of the LVDS
clock driving the LO_ is required to be 0.5ns, reference noise less than 10nV/√Hz from 1kHz to 20MHz, DOUT loaded with 10MΩ
and 60pF. Typical values are at VCC1 = 3.3V, VCC2 = 5V, TA = +25°C, unless otherwise noted.)
TWO-TONE ULTRASOUND-SPECIFIC IMD3
vs. FREQUENCY
0
VOUT = 1VP-P
GAIN = 26dB
ADJACENT CHANNEL-TO-CHANNEL
CROSSTALK vs. GAIN
-50
VOUT = 1VP-P
fRF = 10MHz
ADJACENT CHANNEL-TO-CHANNEL
CROSSTALK vs. FREQUENCY
0
VOUT = 1VP-P
GAIN = 20dB
-20
-55
ADJACENT CHANNEL 1
-30
-40
-60
ADJACENT CHANNEL 1
ADJACENT CHANNEL 2
-60
-60
-65
ADJACENT CHANNEL 2
-80
0
5
10
15
20
FREQUENCY (MHz)
LARGE-SIGNAL BANDWIDTH
vs. FREQUENCY
30
VOUT = 1VP-P
GAIN = 20dB
20
15MHz
10
18MHz
9MHz
0
10MHz
-10
-70
8
17
26
35
44
GAIN (dB)
COMMON-MODE OUTPUT VOLTAGE
vs. GAIN
1.9
1.8
1.7
1.6
-90
1
10
100
FREQUENCY (MHz)
DIFFERENTIAL OUTPUT IMPEDANCE
vs. FREQUENCY
180
80 MAX2078 toc18
60
120
REAL
40
60
20
IMAGINARY
-20
1
10
FREQUENCY (MHz)
1.5
100
8
17
26
35
44
GAIN (dB)
0
0
0
10
20
30
40
50
FREQUENCY (MHz)
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