MP7529B
5 V CMOS
Dual Buffered Multiplying 8-Bit
Digital-to-Analog Converter
FEATURES
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Very Low Total Harmonic Distortion
Low Glitch Energy
Fast Settling Time
Four Quadrant Multiplication
On-Chip Latches for Both DACs
4.5 V to 5.5 V Operation
Low Power Consumption
TTL/5V CMOS Compatible
Latch-Up Free
15 V Operation: MP7529A
BENEFITS
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Quiet Operation in Audio Applications
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Easy Interface to Microprocessors
GENERAL DESCRIPTION
The MP7529B is a dual 8-bit Digital-to-Analog Converter
featuring excellent DAC to DAC matching, tracking and
specifically optimized for applications requiring low total
harmonic distortion. The MP7529B is manufactured using
advanced thin film resistors on a double metal CMOS process.
The MP7529B incorporates a unique bit decoding technique
yielding lower glitch energy, higher speed and excellent
accuracy over temperature and time.
Data is transferred to either of the two D/A Converter latches
via a common 8-bit TTL/5 V CMOS compatible input port. The
control input DAC A/DAC B determines which D/A is to be
loaded.
The device operates from a 4.5 V to 5.5 V power supply, and
is TTL-compatible over this range. Power dissipation is only 10
mW. Both DACs offer excellent four quadrant multiplication
characteristics, and include separate reference inputs and
feedback resistors. An improved latch-up resistant design
eliminates the need for external protective Schottky diodes in
most applications.
SIMPLIFIED BLOCK AND TIMING DIAGRAM
V
DD
V
REFA
DB7-DB0
DAC A/DAC B
CS
WR
R
FBB
D
Q
LATCH B
E
DAC B
I
OUTB
AGND
OUT
R
FBA
DB7-DB0
DAC A/DAC B
D
Q
LATCH A
E
DAC A
I
OUTA
CS
WR
DGND
V
REFB
Rev. 2.00
1
EXAR [ EXAR CORPORATION ]
