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DAC14135MTX fiches techniques PDF

National Semiconductor - 14-bit/ 135MSPS D/A Converter

Numéro de référence DAC14135MTX
Description 14-bit/ 135MSPS D/A Converter
Fabricant National Semiconductor 
Logo National Semiconductor 





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DAC14135MTX fiche technique
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DAC14135
14-bit, 135MSPS D/A Converter
November 1999
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.
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
W-CDMA ACPR
-30
-40
-50 ACPR Lower
72.1dB
-60
Fs = 32.768MSPS
ACPR Upper
73dB
-70
-80
-90
-100
-110
-120
2 4 6 8 10 12 14 16
Frequency (MHz)
Four-Tone SFDR
0
SFDR > 70dBc
-20
-40
Fs = 135MSPS
Fout1 = 6.2MHz
Fout2 = 9.31MHz
Fout3 = 18.8MHz
Fout4 = 21.95MHz
Ampl. = 0dBFS
-60
-80
-100
5 10 15 20 25 30
Frequency (MHz)
© 1999 National Semiconductor Corporation
Printed in the U.S.A.
http://www.national.com

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