ADA8282 Datasheet, PDF (16/21 Pages) Analog Devices – Radar Receive Path AFE - 4-Channel LNA and PGA

ADA8282
Data Sheet
BASIC CONNECTIONS FOR A TYPICAL
series with the bypassing paths. AC couple the inputs and
APPLICATION
outputs for each channel as shown in Figure 30. Pull the RESET pin
The ADA8282 is typically configured to operate with a nominal
3.3 V power supply, using the EPAD as the analog ground
low with a 10 kΩ resistor and drive it with 3.3 V GPIO logic.
The SPI pins can be directly connected to the SPI bus.
connection. Place the bypass capacitors as close as possible to
the power supply pins to minimize the length of metal traces in
GPIO: +3.3V/0V
+3.3V
10kΩ
0.1µF
SPI BUS
+3.3V
0.1µF
INPUT A
SOURCE
INPUT B
SOURCE
INPUT C
SOURCE
INPUT D
SOURCE
0.1µF
0.1µF
0.1µF
0.1µF
0.1µF
0.1µF
0.1µF
0.1µF
+INA
–INA
+INB
1
2
–INB ³
+INC ⁴
–INC ⁵
+IND ⁶
–IND ⁷
8
ADA8282
EPAD TIED
TO GROUND
+OUTA
24
23
–OUTA
+OUTB
22 _–OUTB
21 _+OUTC
20 _–OUTC
19 _+OUTD
18 _–OUTD
17
0.1µF
0.1µF
0.1µF
0.1µF
0.1µF
0.1µF
0.1µF
0.1µF
TO ADC
TO ADC
TO ADC
TO ADC
0.1µF
0.1µF
+3.3V
+3.3V
Figure 30. Typical Component Connections
Rev. 0 | Page 16 of 21