Rainbow Electronics MAX2036 User Manual
Page 5
MAX2036
Ultrasound VGA Integrated
with CW Octal Mixer
_______________________________________________________________________________________
5
AC ELECTRICAL CHARACTERISTICS—CW MIXER MODE (continued)
(Figure 7, V
CC
= V
REF
= 4.75V to 5.25V, T
A
= 0°C to +70°C, V
GND
= 0, LOW_PWR = 0, M4_EN = 0, CW_FILTER = 1, TMODE = 0,
PD = 0, CW_VG = 0, CW_M1 = 0, CW_M2 = 0, VG_CLAMP_MODE = 1, f
RF
= f
LO
/16 = 5MHz, capacitance to GND at each of the
VGA differential outputs is 60pF, differential capacitance across the VGA outputs is 10pF, R
L
= 1kΩ, CW mixer outputs pulled up to
+11V through four separate ±0.1% 115Ω resistors, differential mixer inputs are driven from a low-impedance source. Typical values
are at V
CC
= V
REF
= 5V, T
A
= +25°C, unless otherwise noted.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Maximum Output Voltage at
Clamp ON
VG_CLAMP_MODE = 0,
VG_CTL set for +20dB of gain,
350mV
P-P
differential input
2.2
V
P-P
d i ffer enti al
Maximum Output Voltage at
Clamp OFF
VG_CLAMP_MODE = 1,
VG_CTL set for +20dB of gain,
350mV
P-P
differential input
3.4
V
P-P
d i ffer enti al
CW MIXER MODE
Mixer RF Frequency Range
0.9
7.6
MHz
Mixer LO Frequency Range
1
7.5
MHz
Mixer IF Frequency Range
100
kHz
Maximum Input Voltage Range
1.8
V
P-P
d i ffer enti al
CW_FILTER = 0
633
Differential Input Resistance
CW_FILTER = 1
1440
Ω
M od e 3, f
RF
= f
LO
/4 = 1.25M H z, m easur ed at a
1kH z offset fr eq uency; cl utter tone at 0.9V
P - P
d i ffer enti al m easur ed at the m i xer i np ut
6
Input-Referred Noise Voltage
Mode 3, RF terminated into 50
Ω;
f
LO
/4 = 1.25MHz, measured at 1kHz offset
4.6
nV/√
Hz
Third-Order Intermodulation
Distortion
IMD3
Mode 1, f
RF1
= 5MHz at 0.9V
P-P
differential
input, Doppler tone f
RF2
= 5.01MHz at 25dBc
from clutter tone, f
LO
/16 = 5MHz (Note 10)
-50
dBc
M i xer O utp ut V ol tag e C om p l i ance
(Note 11)
4.75
12.00
V
Channel-to-Channel Phase
Matching
Measured under zero beat conditions,
f
RF
= 5MHz, f
LO
/16 = 5MHz (Note 12)
±3
Degrees
Channel-to-Channel Gain
Matching
Measured under zero beat conditions,
f
RF
= 5MHz, f
LO
/16 = 5MHz (Note 12)
±2
dB
CW_FILTER = 1
f
RF
= 1.1MHz at 1V
P - P
d i ffer enti al ,
f
LO
/16 = 1MHz
2.8
Transconductance
(Note 13)
CW_FILTER = 0
(low LPF cutoff
frequency)
f
RF
= 1.1MHz at 1V
P - P
d i ffer enti al ,
f
LO
/16 = 1MHz
2.8
mS