Rainbow Electronics MAX2038 - Manual (Page 7)

MAX2038
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
= 1k Ω, T
A
= 0 °C to +70°C. Typical
values are at V
CC
= V
REF
= 5V, T
A
= +25 °C, unless otherwise noted.)
0
1.0
0.5
2.0
1.5
3.0
2.5
3.5
4.5
4.0
5.0
0 5.0 7.5 2.5 10.0 12.5 15.0 17.5 20.0
OVERDRIVE PHASE DELAY
vs. FREQUENCY
MAX2038 toc01
FREQUENCY (MHz)
OVERDRIVE PHASE DELAY (ns)
V IN1 = 35mV P-P DIFFERENTIAL
V
IN2
= 87.5mV
P-P
DIFFERENTIAL
GAIN = 20dB
-100
-90
-80
-70
-60
-50
-40
0 75 50 25 100 125 150 175 200
POWER-SUPPLY MODULATION RATIO
MAX2038 toc02
FREQUENCY (kHz)
PSMR (dBc)
V OUT = 1.5V P-P DIFFERENTIAL
V MOD = 50mV P-P , f CARRIER = 5MHz,
GAIN = 10dB
-80
-70
-60
-50
-40
-30
-20
-10
0
-15 -5 5 15 25 35
TWO-TONE ULTRASOUND-SPECIFIC
IMD3 vs. GAIN
MAX2038 toc03
GAIN (dB)
IMD3 (dBc)
V
OUT
= 1V
P-P
DIFFERENTIAL
f = 10MHz
f = 2MHz
f = 5MHz
OVERLOAD RECOVERY TIME
MAX2038 toc07
DIFFERENTIAL
OUTPUT
2.0V/div
DIFFERENTIAL
INPUT
2.0V/div
400ns/div
f = 5MHz
OUTPUT 100mV
P-P
TO OVERLOAD
AND BACK TO 100mV P-P
-100
-80
-90
-60
-70
-40
-50
-30
-10
-20
0
-15 5 -5 15 25 35
SECOND HARMONIC DISTORTION
vs. GAIN
MAX2038 toc04
GAIN (dB)
HD2 (dBc)
V OUT = 1V P-P DIFFERENTIAL
f = 12MHz
f = 2MHz
f = 5MHz
-100
-80
-90
-60
-70
-40
-50
-30
-10
-20
0
-15 5 -5 15 25 35
THIRD HARMONIC DISTORTION
vs. GAIN
MAX2038 toc05
GAIN (dB)
HD3 (dBc)
V OUT = 1V P-P DIFFERENTIAL
f = 12MHz
f = 2MHz
f = 5MHz
OVERLOAD RECOVERY TIME
MAX2038 toc06
DIFFERENTIAL
OUTPUT
1.0V/div
DIFFERENTIAL
INPUT
1.0V/div
400ns/div
f = 5MHz
OUTPUT 1V P-P TO OVERLOAD AND BACK TO 1V P-P