AD8283 Datasheet, PDF (1/28 Pages) Analog Devices – Radar Receive Path AFE: 6-Channel LNA/PGA/AAF with ADC

Radar Receive Path AFE:
6-Channel LNA/PGA/AAF with ADC
AD8283
FEATURES
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 80 MSPS
SNR = 67 dB
SFDR = 68 dB
Low power, 170 mW per channel at 12 bits/80 MSPS
Low noise, 3.5 nV/√Hz maximum of input referred
voltage noise
Power-down mode
72-lead, 10 mm × 10 mm, LFCSP package
Specified from −40°C to +105°C
Qualified for automotive applications
APPLICATIONS
Automotive radar
Adaptive cruise control
Collision avoidance
Blind spot detection
Self-parking
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).
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 80 MSPS.
The combined input-referred noise voltage of the entire channel
FUNCTIONAL BLOCK DIAGRAM
INA+
INA–
INB+
INB–
INC+
INC–
IND+
IND–
INE+
INE–
INF+
INF–
INADC+
INADC–
LNA PGA _AAF
LNA PGA _AAF
LNA PGA AAF
LNA PGA _AAF
LNA PGA _AAF
LNA PGA AAF
SPI
REFERENCE
MUX
12-BIT
ADC
DRV
AD8283
DSYNC
D[0:11]
Figure 1.
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.
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.
Rev. 0
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