DPS9245

( DataSheet : www.DataSheet4U.com ) DPS9245 High-Resolution ADC with PGA Datasheet The DPS9245 is a versatile, analog front end that combines a highresolution 5 megasamples per second (MS/s) 16-bit Analog-to-Digital Converter (ADC), a built-in reference, and a Programmable Gain Amplifier (PGA) with resistive input impedance in a 44-pin package. Figure 1 DPS9245 Block Diagram REFCLK RESETB Differential Analog In (INP, INM) Low-Noise PGA (7 Settings) OVR_RNG S/H and ADC 16 Data AD[15:0] OE GAIN[2:0] VREF The chip includes a digitally-calibrated, pipeline ADC that is calibrated upon assertion of a simple reset signal. The combination of a low-noise, high-linearity, high-input impedance buffer (with programmable gain), wideband S/H, on-board voltage references, and simple digital interface (16-bit parallel output word synchronous with the master sampling clock), makes the chip extremely easy to use in a wide variety of systems. The analog inputs should be driven differentially, and can be AC-coupled or DC-coupled to a source. Typical applications include high-performance data acquisition systems, automatic test equipment, and wideband digital communications receivers present in systems such as wireless basestations. The performance of the device with respect to linearity and noise should be considered separately, as indicated by the THD and SNR specifications provided in this document. November 2000 Copyright © 1999, 2000 by LSI Logic Corporation. All rights reserved. 1 ww...