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All data sheets are subject to change without notice
(858) 503-3300- Fax: (858) 503-3301- www.maxwell.com
12-Bit Buffered Multiplying
7545A
©2001 Maxwell Technologies
All rights reserved.
Digital to Analog Converter
02.05.02 Rev 4
REF
V
V
DD
DGND
AGND
OUT1
DB11-DBO
INPUT DATA LATCHES
DAC
12
12
12-BIT MULTIPYING
R
FB
R
WR
CS
FEATURES:
•RAD-PAK® patented shielding against natural space radia-
tion
Total dose hardness:
- > 100 krad (Si), depending upon space mission
Excellent single event effects
- SEL
TH
: > 120 MeV/mg/cm
2
- SEU
TH
: > 120 MeV/mg/cm
2
using all 1’s
Package:
- 20 pin RAD-PAK® Flat Pack
- 20 pin RAD-PAK® DIP
Low gain temperature coefficient:
- 5 ppm/
°
C typ.
Fast interface timing
Single +5 V to +15 V supply
DESCRIPTION:
Maxwell Technologies’ 7545A is a 12-bit CMOS-buffered mul-
tiplying DAC with internal data latches, which features a
greater than 100 krad (Si) total dose tolerance, depending
upon space mission. The 7545A features a WR pulse width of
100 ns which allows interfacing to a much wider range of fast
8-bit and 16-bit microprocessors. It is loaded by a single 12-bit
wide word under the control of the CS and WR inputs; tying
these control inputs low makes the input latches transparent
allowing unbuffered operation of the DAC. The 7545A is par-
ticularly suitable for single supply operations and applications
with wide temperature variations.
Maxwell Technologies' patented RAD-PAK® packaging technol-
ogy incorporates radiation shielding in the microcircuit pack-
age. It eliminates the need for box shielding while providing
the required radiation shielding for a lifetime in orbit or space
mission. In a GEO orbit, RAD-PAK provides greater than 100
krad (Si) radiation dose tolerance. This product is available
with screening up to Class S.