ADS7890 Datasheet | Burr-Brown

FEATURES D 1.25 MHz Sample Rate, 14-Bit Resolution D Zero Latency D Unipolar, Pseudo Differential Input, Range: - 0 V to 2.5 V D SPIE patible Serial Interface D 77.5 d B SNR and - 95 d B THD at 0.5 MHz I/P D Power Dissipation 45 m W at 1.25 MSPS D Nap Mode (10 m W Power Dissipation) D Power Down (10 m W) D Internal Reference D Internal Reference Buffer D 48-Pin TQFP Package APPLICATIONS D Optical Networking (DWDM, MEMS Based Switching) D Spectrum Analyzers D High Speed Data Acquisition Systems D High Speed Close-Loop Systems D Telemunication DESCRIPTION The ADS7890 is a 14-bit 1.25-MSPS A-to-D converter with 2.5-V internal reference. The device includes a capacitor based SAR A/D converter with inherent sample and hold. The device offers a 14-bit serial SPI or DSP patible interface. The device has a pseudo-differential input stage. The - IN swing of ±200 m V is useful to pensate for ground voltage mismatch between the ADC and sensor and also to cancel mon-mode noise. The device operates at lower power when used at lower conversion rates because of the nap feature . The device is available in a 48-pin TQFP package. +IN + - IN _ REFIN REFOUT CDAC parator Output Latches and 3-State Drivers CLOCK 2.5 V Internal Reference Conversion and Control Logic PWD/RST SCLK BUSY CS FS Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. SPI is a trademark of Motorola, Inc. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright  2003, Texas Instruments Incorporated SLAS409 - DECEMBER 2003 .ti. This integrated circuit can be damaged by ESD. Texas Instruments remends that all integrated circuits be handled...