Datasheet
MAX2037
Ultrasound Variable-Gain Amplifier
8 _______________________________________________________________________________________
Pin Description
PIN NAME FUNCTION
1, 2, 5, 6, 7, 10,
11, 12, 19, 20,
21, 24, 25, 26,
29, 30, 31, 34,
35, 36, 41, 43,
44, 45, 47, 48,
51, 55, 58, 59,
64, 65, 66, 69,
73, 76, 79, 80,
81, 83, 84, 85,
88–92, 96, 97,
98
GND Ground
3 VGIN3- VGA Channel 3 Inverting Differential Input
4 VGIN3+ VGA Channel 3 Noninverting Differential Input
8 VGIN4- VGA Channel 4 Inverting Differential Input
9 VGIN4+ VGA Channel 4 Noninverting Differential Input
13 EXT_C1 External Compensation. Connect a 4.7µF capacitor to ground.
14 EXT_C2 External Compensation. Connect a 4.7µF capacitor to ground.
15 EXT_C3 External Compensation. Connect a 4.7µF capacitor to ground.
16, 39, 42, 46,
54, 72, 82, 87
V
CC
5V Power Supply. Bypass each V
CC
supply to ground with 0.1µF capacitors as close to the
pins as possible.
17 VGIN5- VGA Channel 5 Inverting Differential Input
18 VGIN5+ VGA Channel 5 Noninverting Differential Input
22 VGIN6- VGA Channel 6 Inverting Differential Input
23 VGIN6+ VGA Channel 6 Noninverting Differential Input
27 VGIN7- VGA Channel 7 Inverting Differential Input
28 VGIN7+ VGA Channel 7 Noninverting Differential Input
32 VGIN8- VGA Channel 8 Inverting Differential Input
33 VGIN8+ VGA Channel 8 Noninverting Differential Input
37, 93 V
REF
5V Reference Supply. Bypass to GND with a 0.1µF capacitor as close to the pins as
possible. Note that noise performance of the device is dependent on the noise contribution
from the supply to V
REF
. Use a low noise supply for V
REF
. V
CC
and V
REF
can be connected
together to share the same supply voltage if the supply for V
CC
exhibits low noise.
38 EXT_RES External Resistor. Connect a 7.5kΩ resistor to ground.
40 PD
Power-Down Switch. Drive PD high to set the device in power-down mode. Drive PD low for
normal operation.
49 VGOUT8+ VGA Channel 8 Noninverting Differential Output
50 VGOUT8- VGA Channel 8 Inverting Differential Output
52 VGOUT7+ VGA Channel 7 Noninverting Differential Output
53 VGOUT7- VGA Channel 7 Inverting Differential Output
56 VGOUT6+ VGA Channel 6 Noninverting Differential Output
57 VGOUT6- VGA Channel 6 Inverting Differential Output
60 VGOUT5+ VGA Channel 5 Noninverting Differential Output