參數(shù)資料
型號(hào)： 7846ARPFS
廠商： MAXWELL TECHNOLOGIES
元件分類： DAC
英文描述： 16-Bit Digital to Analog Converter
中文描述： PARALLEL, WORD INPUT LOADING, 9 us SETTLING TIME, 16-BIT DAC, DFP28
封裝： RAD PAK, LDFP-28
文件頁(yè)數(shù)： 1/11頁(yè)
文件大?。?/td> 256K
代理商： 7846ARPFS
1
M
All data sheets are subject to change without notice
(619) 503-3300 - Fax: (619) 503-3301- wwwmaxwell.com
16-Bit Digital to Analog Converter
7846A
2003 Maxwell Technologies
All rights reserved.
05.29.03 REV 5
F
EATURES
:
R
AD
-P
AK
technology-hardened against natural
space radiation
Total dose hardness:
- > 100 krad (Si), depending upon space mssion
Excellent Single Event Effects
- SEL
TH
> 114 MeV/mg/cm
2
- SEU < 8 MeV/mg/cm
2
Package:
-28 pin R
AD
-P
AK
Flat Pack
Mcroprocessor compatible with readback capability
16-Bit monotonicity over temperature
±2 LSBs integral linearity error
Unipolar or bipolar output
Multiplying capability
Low power (100 mW typical)
D
ESCRIPTION
:
Maxwell Technologies’ 7846A 16-Bit DAC converter mcrocir-
cuit features a greater than 100 krad (Si) total dose tolerance,
depending upon space mssion. The 7846A has V
REF+
and
V
REF-
reference inputs and an on-chip output amplifier which
gives the option of unipolar or bipolar output. The 7846A uses
a segmented architecture. The 4 MSBs in the DAC latch
select one of the segments in a 16-resistor string. Both taps of
the segment are buffered by amplifiers and fed to a 12-bit
DAC, which provides a further 12 bits of resolution. This archi-
tecture ensures 16-bit monotonicity. Excellent integral linearity
results fromtight matching between the input offset voltages
of the two buffer amplifiers. In addition to the excellent accu-
racy specifications, the 7846A also offers a comprehensive
mcroprocessor interface. There are 16 data I/O pins, plus
control lines (CS, R/W, LDAC and CLR). R/W and CS have
readback function which allows writing to and reading fromthe
I/O latch.
Maxwell Technologies' patented R
AD
-P
AK
packaging technol-
ogy incorporates radiation shielding in the mcrocircuit pack-
age. It elimnates the need for box shielding while providing
the required radiation shielding for a lifetime in orbit or space
mssion. In a GEO orbit, R
AD
-P
AK
provides greater than 100
krad (Si) radiation dose tolerance. This product is available
with screening up to Class S.
16
Segment
Switch
Matrix
Control
Logic
A2
+
A1
+
A3
+
I/O Latch
DAC Latch
12-bit DAC
-
-
-
R
R
6
5
23
22
25
24
20
3
10
9
8
7
21
4
V
DD
V
CC
V
REF+
V
REF-
V
SS
Logic Diagram
DB15
DB0
DGND
CLR
LDAC
R/W
CS
V
OUT
R
IN
12
12
4
R
R
R
7846A
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