Datasheet AD8283 (Analog Devices)

Radar Receive Path AFE: 6-Channel LNA/PGA/AAF with ADC Data Sheet AD8283 FEATURES FUNCTIONAL BLOCK DIAGRAM 6 channels of LNA, PGA, AAF 8x 3x 8x 3x N DD1 DD3 XA AS 1 channel of direct-to-ADC W DD1 DD3 EF SEL Z AV AV PD MU DV DV VR RBI Programmable gain amplifier (PGA) Includes low noise preamplifier (LNA) INA+ REFERENCE SPI-programmable gain = 16 dB to 34 dB in 6 dB steps LNA PGA INA– AAF Antialiasing filter (AAF) INB+ LNA PGA Programmable third-order low-pass elliptic filter (LPF) from INB– AAF 1 MHz to 12 MHz DSYNC INC+ LNA PGA Analog-to-digital converter (ADC) AAF INC– 12-BIT 12 bits of accuracy up to 72 MSPS MUX DRV D[0:11] ADC IND+ LNA PGA AAF SNR = 67 dB IND– SFDR = 68 dB INE+ LNA PGA AAF Low power, 170 mW per channel at 12 bits/72 MSPS INE– Low noise, 3.5 nV/√Hz maximum of input referred INF+ LNA PGA voltage noise AAF INF– Power-down mode INADC+ INADC– 72-lead, 10 mm × 10 mm, LFCSP package Specified from −40°C to +105°C SPI Qualified for automotive applications AD8283 APPLICATIONS K
001
CS L IO K+ K– AUX SC SD CL CL
9795- 0
Automotive radar
Figure 1.
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, Fabricated in an advanced CMOS process, the AD8283 is flexibility, and ease of use. It contains six channels of a low noise available in a 10 mm × 10 mm, RoHS-compliant, 72-lead preamplifier (LNA) with a programmable gain amplifier (PGA) LFCSP. It is specified over the automotive temperature range and an antialiasing filter (AAF) plus one direct-to-ADC of −40°C to +105°C. channel, all integrated with a single 12-bit analog-to-digital converter (ADC).
Table 1. Related Devices Part No. Description
Each channel features a gain range of 16 dB to 34 dB in 6 dB AD8285 4-Channel LNA/PGA/AAF, pseudosimultaneous increments and an ADC with a conversion rate of up to 72 MSPS. channel sampling with ADC The combined input-referred noise voltage of the entire channel AD8284 4-Channel LNA/PGA/AAF, sequential channel is 3.5 nV/√Hz at maximum gain. The channel is optimized for sampling with ADC dynamic performance and low power in applications where a ADA8282 4-Channel LNA/PGA small package size is critical.
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Document Outline Features Applications Functional Block Diagram General Description Table of Contents Revision History Specifications AC Specifications Digital Specifications Switching Specifications Absolute Maximum Ratings ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Theory of Operation Radar Receive Path AFE Channel Overview Low Noise Amplifier (LNA) Recommendation Antialiasing Filter (AAF) Mux and Mux Controller ADC Clock Input Considerations Clock Duty Cycle Considerations Clock Jitter Considerations SDIO Pin SCLK Pin CS Pin RBIAS Pin Voltage Reference Power and Ground Recommendations Exposed Paddle Thermal Heat Slug Recommendations Serial Peripheral Interface (SPI) Hardware Interface Memory Map Reading the Memory Map Table Logic Levels Reserved Locations Default Values Application Diagrams Outline Dimensions Ordering Guide Automotive Products