Radar Receive Path AFE:
6-Channel LNA/PGA/AAF with ADC
Data Sheet
AD8283
FEATURES
FUNCTIONAL BLOCK DIAGRAM
6 channels of LNA, PGA, AAF
1 channel of direct-to-ADC
Programmable gain amplifier (PGA)
Includes low noise preamplifier (LNA)
SPI-programmable gain = 16 dB to 34 dB in 6 dB steps
Antialiasing filter (AAF)
Programmable third-order low-pass elliptic filter (LPF) from
1 MHz to 12 MHz
Analog-to-digital converter (ADC)
12 bits of accuracy up to 72 MSPS
SNR = 67 dB
INA+
INA–
REFERENCE
LNA
LNA
LNA
LNA
LNA
PGA
PGA
PGA
PGA
PGA
AAF
AAF
AAF
INB+
INB–
DSYNC
D[0:11]
INC+
INC–
12-BIT
ADC
MUX
DRV
IND+
IND–
AAF
AAF
AAF
SFDR = 68 dB
INE+
INE–
Low power, 170 mW per channel at 12 bits/72 MSPS
Low noise, 3.5 nV/√Hz maximum of input referred
voltage noise
INF+
INF–
LNA
PGA
INADC+
INADC–
Power-down mode
72-lead, 10 mm × 10 mm, LFCSP package
Specified from −40°C to +105°C
Qualified for automotive applications
SPI
AD8283
APPLICATIONS
Automotive radar
Adaptive cruise control
Collision avoidance
Blind spot detection
Self-parking
Figure 1.
Electronic bumper
GENERAL DESCRIPTION
The AD8283 is designed for low cost, low power, compact size,
flexibility, and ease of use. It contains six channels of a low noise
preamplifier (LNA) with a programmable gain amplifier (PGA)
and an antialiasing filter (AAF) plus one direct-to-ADC
channel, all integrated with a single 12-bit analog-to-digital
converter (ADC).
Fabricated in an advanced CMOS process, the AD8283 is
available in a 10 mm × 10 mm, RoHS-compliant, 72-lead
LFCSP. It is specified over the automotive temperature range
of −40°C to +105°C.
Table 1. Related Devices
Part No.
Description
Each channel features a gain range of 16 dB to 34 dB in 6 dB
increments and an ADC with a conversion rate of up to 72 MSPS.
The combined input-referred noise voltage of the entire channel
is 3.5 nV/√Hz at maximum gain. The channel is optimized for
dynamic performance and low power in applications where a
small package size is critical.
AD8285
4-Channel LNA/PGA/AAF, pseudosimultaneous
channel sampling with ADC
4-Channel LNA/PGA/AAF, sequential channel
sampling with ADC
AD8284
ADA8282 4-Channel LNA/PGA
Rev. C
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