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7872 Datasheet

  • 7872

  • 14-Bit A/D Converter

  • 11頁

  • MAXWELL

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7872
14-Bit A/D Converter
AGND
C
REF
REF OUT
V
IN
V
DD
V
DD
12
11
13
R
R
14
TRACK/HOLD
9
16
COMP
3V
REFERENCE
14-BIT DAC
CLK
3
CLOCK
SAR + COUNTER
CONTROL
CONVST
1
2
CONTROL
LOGIC
4
SERIAL
INTERFACE
5
SCLK
6
SDATA
8
DGND
15
V
SS
SSTRB
Logic Diagram
Memory
F
EATURES
:
鈥?14-bit resolution and accuracy
鈥?Total dose hardness:
- > 100 krad (Si), depending upon space mission
鈥?Single event effects:
- SEL > 104 MeV/mg/cm
2
- SEU
TH
= 1.4 MeV/mg/cm
2
- SEU
Sat
= 1E-3 cm
2
/Device
鈥?Package:
- 16 pin R
AD
-P
AK
廬 flat package
- 16 pin R
AD
-P
AK
廬 dual-in-line package
鈥?Fast Conversion Times: 10 碌 s
鈥?Low 50 mW typical power consumption
鈥?High speed LC
2
MOS technology
- Analog input range of 鹵3V
- 83 KSPS throughput rate
- Operates with +5V/-5V power supplies
- 80 dB SNR at 10 kHz input frequency
- 2 s complement coding
- Serial output
D
ESCRIPTION
:
Maxwell Technologies鈥?7872 high-speed 14-bit ADC microcir-
cuit features a greater than 100 krad (Si) total dose tolerance;
depending upon orbit. The 7872 consists of a track/hold ampli-
fier, successive-approximation ADC, 3V buried Zener refer-
ence and versatile interface logic. It features a self-contained,
laser- trimmed internal clock, so no external clock timing com-
ponents are required. For minimum noise possible, the on-
chip clock may be overridden to synchronize the device oper-
ation to the digital system. The 7872 is a serial output device.
It is capable of interfacing to all modern microprocessors and
digital signal processors. The 7872 operates from 鹵5V power
supplies, accepts bipolar input signals of 鹵3V and is able to
convert full power signals up to 41.5 kHz. It is also fully speci-
fied for dynamic performance parameters including distortion
and signal-to-noise ratio.
Maxwell Technologies' patented R
AD
-P
AK
廬 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, R
AD
-P
AK
provides greater than 100
krad (Si) radiation dose tolerance. This product is available
with screening up to Class S.
5.21.02 Rev 4
All data sheets are subject to change without notice
1
(858) 503-3300 - Fax: (858) 503-3301 - www.maxwell.com
漏2001 Maxwell Technologies
All rights reserved.

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