12-Bit, 80Msps, 3.3V IF-Sampling ADC

The MAX1209 is a 3.3V, 12-bit, 80Msps Analog-to-digital converter (ADC) featuring a fully differential wideband track-and-hold (T/H) input Amplifier driving a low-noise internal quantizer. The Analog input stage accepts sin- gle-ended or differential signals. The MAX1209 is opti- mized for low power, small size, and high dynamic performance. Excellent dynamic performance is main- tained from baseband to input frequencies of 175MHz and beyond, making the MAX1209 ideal for intermediate- frequency (IF) sampling applications. Powered from a single 3.0V to 3.6V supply, the MAX1209 consumes only 366mW while delivering a typical signal-to-noise (SNR) performance of 66.5dB at an input frequency of 175MHz. In addition to low oper- ating power, the MAX1209 features a 3W power-down mode to conserve power during idle periods. A flexible reference structure allows the MAX1209 to use the internal 2.048V bandgap reference or accept an externally applied reference. The reference structure allows the full-scale Analog input range to be adjusted from 0.35V to 1.15V. The MAX1209 provides a com- mon-mode reference to simplify design and reduce exter- nal component count in differential Analog input circuits. The MAX1209 supports both a single-ended and differ- ential input Clock drive. Wide variations in the Clock duty cycle are compensated with the ADCs internal duty-cycle equalizer (DCE). ADC conversion results are available through a 12-bit, parallel, CMOS-compatible output bus. The digital out- put format is pin selectable to be either twos comple- ment or Gray code. A data-valid indicator eliminates external components that are normally required for reli- able digital interfacing. A separate digital power input accepts a wide 1.7V to 3.6V supply, allowing the MAX1209 to Interface with various Logic levels. The MAX1209 is available in a 6mm x 6mm x 0.8mm, 40-pin thin QFN package with exposed paddle (EP), and is specified for the extended industrial (-40C to +85C) temperature range MAX12553 MAX1209 MAX1211 MAX1208 MAX1207 MAX1206 By Maxim Integrated Products