Analog Devices AD9271BSVZRL-25

AFE General Purpose 8ADC 12-Bit 1.8V/3.3V 100-Pin TQFP EP T/R

ANALOG CIRCUIT; Temperature Grade: INDUSTRIAL; No. of Terminals: 100; Package Code: HTFQFP; Package Shape: SQUARE; Surface Mount: YES;

A/D Converter (A-D) IC; Resolution (Bits):12; Input Channels Per ADC:8; Input Channel Type:Single Ended; Data Interface:Serial, LVDS; Termination:SMD; Package/Case:100-TQFP; Leaded Process Compatible:Yes RoHS Compliant: Yes

The AD9271 is designed for low cost, low power, small size, and ease of use. It contains eight channels of a variable gain amplifier (VGA) with low noise preamplifier (LNA); an antialiasing filter (AAF); and a 12-bit, 10 MSPS to 50 MSPS analog-to-digital converter (ADC). Each channel features a variable gain range of 30 dB, a fully differential signal path, an active input preamplifier termination, a maximum gain of up to 40 dB, and an ADC with a conversion rate of up to 50 MSPS. The channel is optimized for dynamic performance and low power in applications where a small package size is critical. The LNA has a single-ended-to-differential gain that is selectable through the SPI. The LNA input noise is typically 1.2 nV/√Hz, and the combined input-referred noise of the entire channel is 1.4 nV/√Hz at maximum gain. Assuming a 15 MHz noise bandwidth (NBW) and a 15.6 dB LNA gain, the input SNR is roughly 86 dB. In CW Doppler mode, the LNA output drives a transconductance amp that is switched through an 8 × 6 differential crosspoint switch. The switch is programmable through the SPI. APPLICATIONS Medical imaging/ultrasound Automotive radar