Rainbow Electronics MAX2038 - Manual (Page 8)

MAX2038
Ultrasound VGA Integrated
with CW Octal Mixer
8 _______________________________________________________________________________________
20
15
10
5
0
-5
-10
-15
-20
0.1 10 100 1 1000
LARGE-SIGNAL BANDWIDTH
vs. FREQUENCY
MAX2038 toc14
FREQUENCY (MHz)
GAIN (dB)
V OUT = 1.5V P-P DIFFERENTIAL
VG_CTL = +0.6V P-P DIFFERENTIAL
10
5
0
-5
-10
-15
-20
-25
-30
0.1 10 100 1 1000
LARGE-SIGNAL BANDWIDTH
vs. FREQUENCY
MAX2038 toc15
FREQUENCY (MHz)
GAIN (dB)
V OUT = 1.5V P-P DIFFERENTIAL
VG_CTL = +1.5V P-P
5
0
-5
-10
-15
-20
-25
-30
-35
0.1 10 100 1 1000
LARGE-SIGNAL BANDWIDTH
vs. FREQUENCY
MAX2038 toc16
FREQUENCY (MHz)
GAIN (dB)
V OUT = 1V P-P DIFFERENTIAL
VG_CTL = +1.7V P-P DIFFERENTIAL
-25
-5
-15
15
5
25
35
-2.5 -0.5 -1.5 0.5 1.5 2.5
GAIN vs. DIFFERENTIAL ANALOG
CONTROL VOLTAGE (VG_CTL)
MAX2038 toc11
VG_CTL (V P-P DIFFERENTIAL)
f = 5MHz
GAIN (dB)
40
35
30
25
20
15
10
5
0
0.1 10 100 1 1000
LARGE-SIGNAL BANDWIDTH
vs. FREQUENCY
MAX2038 toc12
FREQUENCY (MHz)
GAIN (dB)
V OUT = 1.5V P-P DIFFERENTIAL
VG_CTL = -2V P-P DIFFERENTIAL
30
25
20
15
10
5
0
-5
-10
0.1 10 100 1 1000
LARGE-SIGNAL BANDWIDTH
vs. FREQUENCY
MAX2038 toc13
FREQUENCY (MHz)
GAIN (dB)
V OUT = 1.5V P-P DIFFERENTIAL
VG_CTL = -1V
P-P
DIFFERENTIAL
-100
-90
-95
-80
-85
-75
-65
-70
-60
-15 5 -5 15 25 35
CHANNEL-TO-CHANNEL CROSSTALK
vs. GAIN
MAX2038 toc08
GAIN (dB)
CROSSTALK (dB)
V OUT = 1.5V P-P DIFFERENTIAL
f = 10MHz, ADJACENT CHANNELS
-30
-110
1 10 100
CHANNEL-TO-CHANNEL CROSSTALK
vs. FREQUENCY
-90
-100
MAX2038 toc09
FREQUENCY (MHz)
CROSSTALK (dB)
-70
-80
-60
-50
-40
V OUT = 1V P-P DIFFERENTIAL
GAIN = 10dB, ADJACENT CHANNELS
0
10
20
30
40
50
-15 5 -5 15 25 35
OUTPUT-REFERRED NOISE VOLTAGE
vs. GAIN
MAX2038 toc10
GAIN (dB)
f = 5MHz
OUTPUT-REFERRED NOISE VOLTAGE (nV/
√
Hz)
Typical Operating Characteristics (continued)
(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.)