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DAC908UG4 Arkusz danych(PDF) 1 Page - Texas Instruments

Numer części DAC908UG4
Szczegółowy opis  8-Bit, 165MSPS DIGITAL-TO-ANALOG CONVERTER
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Producent  TI1 [Texas Instruments]
Strona internetowa  http://www.ti.com
Logo TI1 - Texas Instruments

DAC908UG4 Arkusz danych(HTML) 1 Page - Texas Instruments

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DAC908
SBAS109B – JUNE 2003
www.ti.com
Copyright © 2002-2003, Texas Instruments Incorporated
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.
DAC
908
DAC908
8-Bit, 165MSPS
DIGITAL-TO-ANALOG CONVERTER
FEATURES
q SINGLE +5V OR +3V OPERATION
q HIGH SFDR: 5.04MHz Output at 100MSPS: 67dBc
q LOW GLITCH: 3pV-s
q LOW POWER: 170mW at +5V
q INTERNAL REFERENCE:
Optional Ext. Reference
Adjustable Full-Scale Range
Multiplying Option
APPLICATIONS
q MEDICAL INSTRUMENTATION
Ultrasound (DBF)
q VIDEO, DIGITAL TV
q WAVEFORM GENERATION
Direct Digital Synthesis (DDS)
Arbitrary Waveform Generation (ARB)
q TEST INSTRUMENTATION
q COMMUNICATIONS
DESCRIPTION
The DAC908 is a high-speed, Digital-to-Analog Converter (DAC)
offering an 8-bit resolution option within the SpeedPlus family of
high-performance converters. Featuring pin compatibility among
family members, the DAC900, DAC902, and DAC904 provide a
component selection option to an 10-, 12-, and 14-bit resolution,
respectively. All models within this family of DACs support update
rates in excess of 165MSPS with excellent dynamic performance,
and are especially suited to fulfill the demands of a variety of
applications.
The advanced segmentation architecture of the DAC908 is opti-
mized to provide a high Spurious-Free Dynamic Range (SFDR) for
single-tone, as well as for multi-tone signals—essential when used
for the transmit signal path of communication systems.
The DAC908 has a high impedance (200k
Ω) current output with a
nominal range of 20mA and an output compliance of up to 1.25V.
The differential outputs allow for both a differential or single-
ended analog signal interface. The close matching of the current
outputs ensures superior dynamic performance in the differential
configuration, which can be implemented with a transformer.
Utilizing a small geometry CMOS process, the monolithic DAC908
can be operated on a wide, single-supply range of +2.7V to +5.5V.
Its low power consumption allows for use in portable and battery-
operated systems. Further optimization can be realized by lowering
the output current with the adjustable full-scale option.
For noncontinuous operation of the DAC908, a power-down mode
results in only 45mW of standby power.
The DAC908 comes with an integrated 1.24V bandgap reference
and edge-triggered input latches, offering a complete converter
solution. Both +3V and +5V CMOS logic families can be inter-
faced to the DAC908.
The reference structure of the DAC908 allows for additional
flexibility by utilizing the on-chip reference, or applying an exter-
nal reference. The full-scale output current can be adjusted over a
span of 2mA to 20mA, with one external resistor, while maintain-
ing the specified dynamic performance.
The DAC908 is available in the SO-28 and TSSOP-28 packages.
TM
Current
Sources
LSB
Switches
Segmented
Switches
+1.24V Ref.
Latches
8-Bit Data Input
D7...D0
DAC908
FSA
BW
+VD
+VA
AGND
CLK
DGND
REFIN
INT/EXT
IOUT
IOUT
BYP
PD
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.


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