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参数资料
| 型号： | 7846RPFI |
| 厂商： | MAXWELL TECHNOLOGIES |
| 元件分类： | DAC |
| 英文描述： | PARALLEL, WORD INPUT LOADING, 16-BIT DAC, DFP28 |
| 封装： | RAD-PAK, LDFP-28 |
| 文件页数： | 1/11页 |
| 文件大小： | 214K |
| 代理商： | 7846RPFI |
1
Memory
All data sheets are subject to change without notice
(619) 503-3300 - Fax: (619) 503-3301- www.maxwell.com
16-Bit Digital to Analog Converter
7846
2002 Maxwell Technologies
All rights reserved.
02.19.02 Rev 4
FEATURES:
RAD-PAK technology-hardened against natural space radi-
ation
Total dose hardness:
- > 100 krad (Si), depending upon space mission
Excellent Single Event Effects
- SEL
TH > 114 MeV/mg/cm
2
- SEU < 8 MeV/mg/cm2
Package:
-28 pin RAD-PAK Flat Pack
Microprocessor 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)
DESCRIPTION:
Maxwell Technologies’ 7846 16-Bit DAC converter microcircuit
features a greater than 100 krad (Si) total dose tolerance,
depending upon space mission. The 7846 has V
REF+ and
V
REF- reference inputs and an on-chip output amplifier which
gives the option of unipolar or bipolar output. The 7846 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 architecture
ensures 16-bit monotonicity. Excellent integral linearity results
from tight matching between the input offset voltages of the
two buffer amplifiers. In addition to the excellent accuracy
specifications, the 7846 also offers a comprehensive micro-
processor 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 from the I/O latch.
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.
16
Segment
Switch
Matrix
Control
Logic
A2
A1
A3
I/O Latch
DAC Latch
12-bit DAC
-
+
-
+
-
+
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
DB15
DB0
DGND
CLR
LDAC
R/W
CS
V
OUT
R
IN
12
4
R
Logic Diagram
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