7846RPFE(2001) View Datasheet(PDF) - MAXWELL TECHNOLOGIES
Part Name
Description
Manufacturer
7846RPFE Datasheet PDF : 11 Pages
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7846
16-Bit Digital to Analog Converter
VREF+ 7
R
R
R
VREF- 8
16
Segment
Switch
Matrix
4
VCC
21
-+A2
12-bit DAC
- A1
12
+
DAC Latch
12
I/O Latch
9
10
3
VSS
DB15 DB0
Logic Diagram
VDD
4
R
R
- A3
+
6 RIN
5 VOUT
Control
Logic
23 CS
22 R/W
25 LDAC
24 CLR
20
DGND
FEATURES:
• RAD-PAK® technology-hardened against natural space radi-
ation
• Total dose hardness:
- > 100 krad (Si), depending upon space mission
• Excellent Single Event Effects
- SELTH > 114 MeV/mg/cm2
- 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 VREF+ and
VREF- 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.
1000602
12.19.01 Rev 3
(619) 503-3300 - Fax: (619) 503-3301- www.maxwell.com
All data sheets are subject to change without notice 1
©2001 Maxwell Technologies
All rights reserved.
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