Instruction Manual

MAX2036
Ultrasound VGA Integrated
with CW Octal Mixer
_______________________________________________________________________________________ 7
Typical Operating Characteristics
(Figure 7, V
CC
= V
REF
= 4.75V to 5.25V, V
GND
= 0, PD = 0, VG_CLAMP_MODE = 1, f
RF
= 5MHz, capacitance to GND at each of the
VGA differential outputs is 60pF, differential capacitance across the VGA outputs is 10pF, R
L
= 1kΩ, T
A
= 0°C to +70°C. Typical val-
ues are at V
CC
= V
REF
= 5V, V
CM
= 3.0V, T
A
= +25°C, unless otherwise noted.)
OVERDRIVE PHASE DELAY
vs. FREQUENCY
MAX2036 toc01
V
IN1
= 35mV
P-P
DIFFERENTIAL
V
IN2
= 87.5mV
P-P
DIFFERENTIAL
GAIN = 20dB
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0 2.5 5.0 7.5 10.0 12.5 15.0
OVERDRIVE PHASE DELAY (ns)
FREQUENCY (MHz)
17.5 20.0
POWER-SUPPLY MODULATION RATIO
MAX2036 toc02
V
OUT
= 1.5V
P-P
DIFFERENTIAL
V
MOD
= 50mV
P-P
, f
CARRIER
= 5MHz,
GAIN = 20dB
-30
-40
-50
-60
-70
-80
-90
0 25 50 75 100 125 150
PSMR (dBc)
FREQUENCY (kHz)
175 200
TWO-TONE ULTRASOUND-SPECIFIC
IMD3 vs. GAIN
MAX2036 toc03
-30
-40
-50
-60
-70
-80
-20
-10
0
-15 -5 5 15 25 35 45
IMD3 (dBc)
GAIN (dB)
V
OUT
= 1V
P-P
DIFFERENTIAL
GAIN = 20dB
f = 2MHz, 5MHz
f = 10MHz
OVERLOAD RECOVERY TIME
MAX2036 toc07
OUTPUT OVERLOAD TO 100mV
P-P
f = 5MHz
DIFFERENTIAL
INPUT
200mV/div
DIFFERENTIAL
OUTPUT
500mV/div
SECOND-HARMONIC DISTORTION
vs. GAIN
MAX2036 toc04
-30
-40
-50
-60
-70
-100
-90
-80
-20
-10
0
-15 -5 5 15 25 35 45
HD2 (dBc)
GAIN (dB)
f = 2MHz
V
OUT
= 1V
P-P
DIFFERENTIAL
f = 5MHz
f = 12MHz
THIRD-HARMONIC DISTORTION
vs. GAIN
MAX2036 toc05
-30
-40
-50
-60
-70
-100
-90
-80
-20
-10
0
-15 -5 5 15 25 35 45
HD3 (dBc)
GAIN (dB)
V
OUT
= 1V
P-P
DIFFERENTIAL
f = 12MHz
f = 5MHz
f = 2MHz
OVERLOAD RECOVERY TIME
MAX2036 toc06
OUTPUT OVERLOAD TO 1V
P-P
f = 5MHz
DIFFERENTIAL
INPUT
200mV/div
DIFFERENTIAL
OUTPUT
500mV/div