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DAC14135MT Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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DAC14135MT Datasheet(HTML) 1 Page - National Semiconductor (TI) |
1 / 12 page © 1999 National Semiconductor Corporation http://www.national.com Printed in the U.S.A. N General Description The DAC14135 is a monolithic 14-bit, 135MSPS digital-to-analog converter. The device has been optimized for use in cellular base stations and other applications where high resolution, high sampling rate, wide dynamic range, and compact size are required. The DAC14135 has many integrated features including a proprietary segmented DAC core, differential current outputs, a band-gap voltage reference, and TTL/CMOS compatible inputs. The converter features an 85dBc spurious free dynamic range (SFDR) at low frequencies and a 70dBc SFDR with 20MHz output signals. The 48-pin TSSOP package provides an extremely small footprint for applications where space is a critical consider- ation. The DAC14135 operates from a single +5V power supply. The digital power supply can also operate from +3.3V for lower power consumption and compatibility with +3.3V data inputs. The DAC14135 is fabricated in a 0.5µm CMOS process and is speci- fied over the industrial temperature range of -40°C to +85°C. National Semiconductor thoroughly tests each part to verify full compliance with the guaranteed specifications. DAC14135 14-bit, 135MSPS D/A Converter Features • 135 MSPS • Wide dynamic range SFDR @ 1MHz fout: 85dBc SFDR @ 5MHz fout: 79dBc SFDR @ 20MHz fout: 70dBc • Differential Current Outputs • Low power consumption: 185mW • Very small package: 48-pin TSSOP • TTL/CMOS (+3.3V or +5V) inputs Applications • Cellular Basestations: GSM, WCDMA, DAMPS, etc. • Multi-carrier Basestations • Multi-standard Basestations • Direct digital synthesis (DDS) • ADSL modems • HFC modems November 1999 W-CDMA ACPR Frequency (MHz) -120 -40 -80 -90 -100 -30 2468 10 12 14 16 -110 Four-Tone SFDR Frequency (MHz) -100 -20 -40 -60 0 510 15 20 25 30 -80 Fs = 135MSPS Fout1 = 6.2MHz Fout2 = 9.31MHz Fout3 = 18.8MHz Fout4 = 21.95MHz Ampl. = 0dBFS Fs = 32.768MSPS -50 -60 -70 ACPR Lower 72.1dB ACPR Upper 73dB SFDR > 70dBc |
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