AD9276

The AD9276 is designed for low cost, low power, small size,and ease of use. It contains eight channels of a variable gain amplifier (VGA) with a low noise preamplifier (LNA); an antialiasing filter (AAF); a 12-bit, 10 MSPS to 80 MSPS analog-todigital converter (ADC); and an I/Q demodulator with programmable phase rotation.

Features of the AD9276 are:(1)dual-mode active input impedance matching; (2)bandwidth (BW) > 100 MHz; (3)full-scale (FS) output: 4.4 V p-p differential; (4)individual programmable phase rotation; (5)flexible power-down modes; (6)overload recovery in <10 ns; (7)programmable second-order LPF from 8 MHz to 18 MHz.Each channel features a variable gain range of 42 dB, a fully differential signal path, an active input preamplifier termination,a maximum gain of up to 52 dB, and an ADC with a conversion rate of up to 80 MSPS. The channel is optimized for dynamic performance and low power in applications where a small package size is critical.

The absolute maximum ratings of the AD9276 can be summarized as:(1)AVDD1 to GND:-0.3V to +2.0V;(2)storage temperature range:-65 to +150;(3)junction temperature:150;(4)operating temperature range:-40 to 85;(5)DRVDD to GND:-0.3 V to +2.0 V;(6)AVDD1 to DRVDD :-2.0 V to +2.0 V.Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.The ADC contains several features designed to maximize flexibility and minimize system cost, such as a programmable clock, data alignment, and programmable digital test pattern generation. The digital test patterns include built-in fixed patterns, built-in pseudorandom patterns, and custom user-defined test patterns entered via the serial port interface.

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