MAX2078CTK(2009) Ver la hoja de datos (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
AC ELECTRICAL CHARACTERISTICS—VGA MODE (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,
V/C = 1, NP = 0, PD = 0, D43/D42/D41/D40 = 1/0/1/0 (RIN = 200Ω, LNA gain = 18.5dB), D45/D44 = 1/1(fC = 18MHz), fRF = 5MHz,
capacitance to GND at each of the VGA differential outputs is 25pF, differential capacitance across VGA outputs is 15pF, RL = 1kΩ
differential, reference noise less than 10nV/√Hz from 1kHz to 20MHz, DOUT loaded with 10MΩ and 60pF. Typical values are at VCC1
= 3.3V, VCC2 = 4.75V, TA = +25°C, unless otherwise noted.) (Note 2)
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
3V Supply Modulation Ratio
Gain = 28dB, VG+ - VG- = 0.4V, VOUT = 1VP-P,
fRF = 5MHz, fMOD = 1kHz, VMOD = 50mVP-P, ratio of
output sideband at 5.001MHz, 1VP-P
-73
dBc
4.75V/5V Supply Modulation
Ratio
Gain = 28dB, VG+ - VG- = 0.4V, VOUT = 1VP-P,
fRF = 5MHz, fMOD = 1kHz, VMOD = 50mVP-P, ratio of
output sideband at 5.001MHz, 1VP-P
-82
dBc
Gain Control Lines Common-
Mode Rejection Ratio
Overdrive Phase Delay
Output Impedance
Gain = 28dB, VG+ - VG- = 0.4V, fMOD = 5MHz,
VMOD = 50mVP-P, VOUT = 1.0VP-P
VG+ - VG- = -3V, delay between VIN = 300mVP-P and
VIN = 30mVP-P differential
Differential
-74
dBc
5
ns
100
Ω
AC ELECTRICAL CHARACTERISTICS—CW MODE
(Typical Application Circuit, V/C = 0, PD = 0, NP = 0, CLP = 0, D43/D42/D41/D40 = 1/0/1/0 (RIN = 200Ω, LNA gain = 18.5dB), fRF =
fLO/16 = 5MHz, 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 (Note 9). Typical values are at VCC1
= 3.3V, VCC2 = 4.75V, TA = +25°C, unless otherwise noted.) (Note 2)
PARAMETER
CONDITIONS
MIN
CW DOPPLER MIXER
Mixer RF Frequency Range
0.9
LO Frequency Range
LO+ and LO-
16
Mixer Output Frequency Range
DC
FULL-POWER MODE
Noise Figure
No carrier
Noise Figure at 100mVP-P Input
100mVP-P at input, fRF = fLO/16 = 1.25MHz, measured at
1kHz offset
TYP MAX UNITS
7.6
MHz
120 MHz
100
kHz
3.4
dB
3.6
dB
Noise Figure at 200mVP-P Input
200mVP-P at input, fRF = fLO/16 = 1.25MHz, measured at
1kHz offset
4.1
dB
SNR at 100mVP-P Input
100mVP-P at input, fRF = fLO/16 = 1.25MHz, measured at
1kHz offset
-148.3
dBc/Hz
SNR at 200mVP-P Input
200mVP-P at input, fRF = fLO/16 = 1.25MHz, measured at
1kHz offset
-153.8
dBc/Hz
6 _______________________________________________________________________________________
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