MAX2077 Ver la hoja de datos (PDF) - Maxim Integrated
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MAX2077 Datasheet PDF : 19 Pages
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Octal-Channel Ultrasound Front-End
Pin Description
PIN
56 TQFN 68 TQFN
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
10
9
11
10
12
11
13
12
14
13
15
14
16
15
17
16
18
17
19
18
20
19
21
20
22
21, 51
23, 64
22
24
23, 35, 49 25, 44, 63
24
26
25
27
26
32
NAME
INC2
ZF3
IN3
INC3
ZF4
IN4
INC4
AG
ZF5
IN5
INC5
ZF6
IN6
INC6
ZF7
IN7
INC7
ZF8
IN8
INC8
VCC2
VREF
VCC1
VG+
VG-
DOUT
FUNCTION
Channel 2 Clamp Input. Connect to a coupling capacitor. See the Typical Application
Circuits for details.
Channel 3 Active Impedance Matching Line. AC-couple to source with a 10nF capacitor.
Channel 3 Positive Differential Input
Channel 3 Clamp Input. Connect to a coupling capacitor. See the Typical Application
Circuits for details.
Channel 4 Active Impedance Matching Line. AC-couple to source with a 10nF capacitor.
Channel 4 Positive Differential Input
Channel 4 Clamp Input. Connect to a coupling capacitor. See the Typical Application
Circuits for details.
AC Ground. Connect a low-ESR 1μF capacitor to ground.
Channel 5 Active Impedance Matching Line. AC-couple to source with a 10nF capacitor.
Channel 5 Positive Differential Input
Channel 5 Clamp Input. Connect to a coupling capacitor. See the Typical Application
Circuits for details.
Channel 6 Active Impedance Matching Line. AC-couple to source with a 10nF capacitor.
Channel 6 Positive Differential Input
Channel 6 Clamp Input. Connect to a coupling capacitor. See the Typical Application
Circuits for details.
Channel 7 Active Impedance Matching Line. AC-couple to source with a 10nF capacitor.
Channel 7 Positive Differential Input
Channel 7 Clamp Input. Connect to a coupling capacitor. See the Typical Application
Circuits for details.
Channel 8 Active Impedance Matching Line. AC-couple to source with a 10nF capacitor.
Channel 8 Positive Differential Input
Channel 8 Clamp Input. Connect to a coupling capacitor. See the Typical Application
Circuits for details.
4.75V Power Supply. Connect to an external 4.75V power supply. Connect all 4.75V supply
pins together externally and bypass with 100nF capacitors as close as possible to the pin.
External 2.5V Reference Supply. Connect to a low-noise power supply. Bypass to GND with
a 0.1μF capacitor as close as possible to the pins. Note that noise performance of the
device is dependent on the noise contribution from VREF. Use a supply with noise lower
than 5nV/Hz from 1kHz to 20MHz.
3.3V Power Supply. Connect to an external 3V power supply. Connect all 3.3V supply pins
together externally and bypass with 100nF capacitors as close as possible to the pin.
VGA Analog Gain Control Differential Input. Set the differential voltage to -3V for maximum
gain and to +3V for minimum gain.
Serial Port Data Output. Data output for ease of daisy-chain programming. The level is 3.3V
CMOS.
10 ______________________________________________________________________________________
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