DAC14135MT ,14-Bit, 135MSPS D/A ConverterElectrical CharacteristicsPARAMETERS CONDITIONS TEMP RATINGS UNITSNOTESMIN TYP MAX RESOLUTION Full ..
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DAC14135MT
14-Bit, 135MSPS D/A Converter
General DescriptionThe 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 f
out
: 85dBc
SFDR @ 5MHz f
out
: 79dBc
SFDR @ 20MHz f
out
: 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
C14135
14-bit,
135MSPS D/A Con
ver
ter
W-CDMA ACPR Power (dB)
Frequency (MHz)
2468 10 12 14 16
Four-Tone SFDR
Power (dB)
Frequency (MHz)
510 15 20 25 30
Fs = 135MSPS
Fout1 = 6.2MHz
Fout2 = 9.31MHz
Fout3 = 18.8MHz
Fout4 = 21.95MHz
Ampl. = 0dBFS
Fs = 32.768MSPS
ACPR Lower
72.1dB
ACPR Upper
73dB
SFDR > 70dBc
