Radar Receive Path AFE:

4-Channel LNA and PGA

Data Sheet

ADA8282

Rev. 0

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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

FUNCTIONAL BLOCK DIAGRAM

+OUTA

–OUTA

+INA

–INA

LNA

PGA

3nV√Hz

+24dB

–6dB TO +12dB

+OUTB

–OUTB

+INB

–INB

LNA

PGA

3nV√Hz

+24dB

–6dB TO +12dB

+OUTC

–OUTC

+INC

–INC

LNA

PGA

3nV√Hz

+24dB

–6dB TO +12dB

+OUTD

–OUTD

+IND

–IND

LNA

PGA

3nV√Hz

+24dB

–6dB TO +12dB

ADA8282

POWER

MODE

SPI

GAIN

SELECT

VIO AVDD RESET

SCLK SDI SDO

CS

Figure 1.

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 combinetoforma 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.

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.