DAC908 Datasheet, PDF (1/15 Pages) Burr-Brown (TI) – 8-Bit, 165MSPS DIGITAL-TO-ANALOG CONVERTER

®
DAC908
DAC908
For most current data sheet and other product
information, visit www.burr-brown.com
DAC908
TM _{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 D/A
converters 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
optimized 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 communica-
tion systems.
The DAC908 has a high impedance (200kΩ) 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 refer-
ence and edge-triggered input latches, offering a complete
converter solution. Both +3V and +5V CMOS logic families
can be interfaced to the DAC908.
The reference structure of the DAC908 allows for additional
flexibility by utilizing the on-chip reference, or applying an
external reference. The full-scale output current can be adjusted
over a span of 2mA to 20mA, with one external resistor, while
maintaining the specified dynamic performance.
The DAC908 is available in the SO-28 and TSSOP-28 pack-
ages.
+V_A
DAC908
FSA
REF_IN
INT/EXT
BW
+V_D
Current
Sources
LSB
Switches
Segmented
Switches
I_OUT
I_OUT
BYP
+1.24V Ref.
AGND
CLK
Latches
PD
8-Bit Data Input
D7...D0
DGND
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©_{1999 Burr-Brown Corporation}
PDS-₁1507B
®
DAC908 ^{Printed in U.S.A. April, 2000}