MP7523/XRD7523
...the analog plus company
TM
15 V CMOS
Multiplying 8-Bit
Digital-to-Analog Converter
January 1996-2
FEATURES
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Full Four-Quadrant Multiplying
Low Feedthrough: 1/2 LSB @ 200 kHz
Fast Settling: 100 ns (typ.)
Low Power Dissipation
Low Cost
5 V/15 V Operation
Buffered Version: MP7524/XRD7524
APPLICATIONS
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Battery Operated Equipment
Low Power, Ratiometric A/D Converters
Digitally Controlled Gain Circuits
Digitally Controlled Attenuators
CRT Character Generation
Low Noise Audio Gain Control
GENERAL DESCRIPTION
The MP7523/XRD7523 is a low cost multiplying Digital-to-
Analog Converter. The device uses an advanced thin-film-on-
CMOS technology to provide 8-bit resolution with accuracy to
10-bits and very low power dissipation.
The MP7523/XRD7523’s excellent multiplying characteris-
tics and low cost allow it to be used in a wide ranging field of ap-
plications such as: low noise audio gain control, CRT character
generation, motor speed control, digitally controlled attenuators,
etc.
SIMPLIFIED BLOCK DIAGRAM
V
DD
2R
V
REF
4R
4R
4R
4R
2R
2R
R
FB
4R
4R
4R
R
I
OUT1
I
OUT2
2 to 3 Decoder
Switch Drivers & Switches
R = 10k
BIT 1
MSB
BIT 8
LSB
3 Segment D/A Converter with Termination to DGND
Logical “1” at Digital Input Steers Current to I
OUT1
Rev. 3.00
E1996
EXAR Corporation, 48720 Kato Road, Fremont, CA 94538
z
(510) 668-7000
z
(510) 668-7010
EXAR [ EXAR CORPORATION ]
