ADA8282 Datasheet, PDF (1/21 Pages) Analog Devices – Radar Receive Path AFE - 4-Channel LNA and PGA

Data Sheet
FEATURES
4 channels of low noise amplifiers (LNAs) followed by
programmable gain amplifiers (PGAs)
Minimum −3 dB bandwidth of 5 MHz
Typical –3 dB bandwidth of 42.3 MHz
Typical slew rate of 28 V/µs
Differential input and output
Gain of 18 dB to 36 dB in 6 dB steps
Selectable low noise and low power modes
Input referred noise of 4.5 nV/√Hz at 18.3 mW per channel
Input referred noise of 3.8 nV/√Hz at 26.5 mW per channel
Input referred noise of 3.6 nV/√Hz at 34.8 mW per channel
Input referred noise of 3.4 nV/√Hz at 54.8 mW per channel
Channel to channel gain matching of ±0.25 dB
Absolute gain error of ±0.5 dB
SPI programmable
Power-down mode (SPI selectable)
3.1 V p-p differential output swing when using a 3.3 V supply
32-lead, 5 mm × 5 mm LFCSP package
Specified from −40°C to +125°C
Qualified for automotive applications
APPLICATIONS
Automotive radar
Adaptive cruise control
Collision avoidance
Blind spot detection
Self parking
Electronic bumpers
GENERAL DESCRIPTION
The ADA8282 is designed for applications that require low cost,
low power, compact size, and flexibility. The ADA8282 has four
parallel channels, eachincluding anLNA and a PGA. The LNA
and PGA combine to form a signal chainthat features a gain range
of 18 dB to 36 dB in 6 dB increments with a guaranteed
minimum bandwidth of 5 MHz.
Using the highest power settings, the combinedinput referred
voltage noise of the combined LNA and PGA channel is
3.4 nV/√Hz at maximum gain.
Radar Receive Path AFE:
4-Channel LNA and PGA
ADA8282
FUNCTIONAL BLOCK DIAGRAM
+INA
–INA
ADA8282
3nV√Hz LNA
PGA
+24dB –6dB TO +12dB
+OUTA
–OUTA
+INB
–INB
3nV√Hz LNA
PGA
+24dB –6dB TO +12dB
+OUTB
–OUTB
+INC
–INC
3nV√Hz LNA
PGA
+24dB –6dB TO +12dB
+OUTC
–OUTC
+IND
–IND
3nV√Hz LNA
PGA
+24dB –6dB TO +12dB
POWER GAIN
MODE SELECT
+OUTD
–OUTD
SPI
CS SCLK SDI SDO VIO AVDD RESET
Figure 1.
The ADA8282 can be configured in four power modes that
trade off power andnoise performance to optimize the overall
performance according to the end application.
Fabricated in an advanced complementary metal-oxide
semiconductor (CMOS) process, the ADA8282 is available in a
5 mm × 5 mm, RoHS-compliant, 32-leadLFCSP. It is specified
over the automotive temperature range of −40°C to +125°C.
Rev. 0
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