Rainbow Electronics MAX2038 - Manual (Page 22)

MAX2038
Ultrasound VGA Integrated
with CW Octal Mixer
22 ______________________________________________________________________________________
12
μ
H
12
μ
H
ONE CHANNEL
ONE CHANNEL
TO 12-BIT IMAGING ADC
TO Q CHANNEL
CWD ADC
TO I CHANNEL
CWD ADC
CWD I/Q LO
CWD Q CHANNELS IN
0.1
μ
F
0.1
μ
F
LO DIVIDER
+V
MIX
+V
MIX
50
Ω
100nF
100nF 100nF
+V -V
+V
IN
100nF
100nF
ZIN IN CONTROL
D2, D1, D0
VG_CTL+
VG_CTL-
VGIN_+ VGIN_- CWIN_+ CWIN_- CW_VG
CW_FIL
TER
VGOUT_+ VGOUT_- CW_IOUT+ CW_IOUT
-
CW_QOUT
-
CW_QOUT+
THIRD-ORDER BUTTERWOR
TH
ANTI-ALIAS FIL
TER
V CC
V
REF
GND
115
Ω
115
Ω
115
Ω
115
Ω
MAX2038
50
Ω
CWD I CHANNELS IN
MAX2034
Figure 7. Typical Per-Channel Ultrasound Imaging Application