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PDF 7820 Data sheet ( Hoja de datos )
| Número de pieza | 7820 | |
| Descripción | Microprocessor Compatible 8-Bit ADC | |
| Fabricantes | Maxwell Technologies | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de 7820 (archivo pdf) en la parte inferior de esta página. Total 18 Páginas | ||
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7820
Microprocessor-compatible
8-Bit ADC
FEATURES:
• 1.36 µ s Conversion Time
• Built-in-Track-and-Hold Function
• Single +5 Volt Supply
• No External Clock Required
• Tri-State Output Buffered
• Total Ionization Dose:
- > 50 krads (Si), depending upon space mission.
• Excellent Single Event Effects
- SEL > 80 MeV/mg/cm2
• Package:
- 20 pin Rad-Pak DIP
Logic Diagram
DESCRIPTION:
The 7820 is a microprocessor compatible 8-bit Analog-to-Digi-
tal Converter with a 0V to +5V input supply range with a single
+5 Volt supply.
The 7820 incorporates internal sample-and-hold circuitry
which eliminates the need for an external S/H for signals with
slew rates less than 100 mV/µ s.
The 7820 was designed to be easiliy interfaced with micropro-
cessors, appearing as either a memory location or I/O port
without the need for external interfacing. All outputs are
latched and tri-state buffered.
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, the RAD-PAK®package provides
greater than 50 krad (Si) radiation dose tolerance. This prod-
uct is available with screening up to Class S.
09.09.03 Rev 3
(858) 503-3300 - Fax: (858) 503-3301 - www.maxwell.com
All data sheets are subject to change without notice 1
©2003 Maxwell Technologies
All rights reserved.
1 page  
Microprocessor-compatible 8-Bit ADC
7820
PARAMETER
TABLE 4. 7820 AC ELECTRICAL CHARACTERISTICS1
(VDD = +5V; VREF(+) = +5V; VREF(-) = GND = 0V, UNLESS OTHERWISE SPECIFIED) (RD MODE (PIN 7 = 0V))
(TA = -55 TO 125 ° C UNLESS OTHERWISE SPECIFIED)
SUBGROUPS
SYMBOL
MIN
MAX
CS to RD/WR Setup Time
CS to RD/WR Hold Time
CS to Delay Time (Pull-up Resistor = 5kΩ
Conversion Time (RD Mode)
Data Access Time (RD Mode)
RD to INT Delay (RD Mode)
Data Hold Time
Delay Time Between Conversions
Write Pulse Width
9, 10, 11
9, 10, 11
9, 10, 11
9, 10, 11
9, 10, 11
9, 10, 11
9, 10, 11
9, 10, 11
9, 10, 11
tCSS
tCSH
tRDY
tCRD
tACCD
tINTH
tDH
tp
tWR
0 --
0 --
-- 100
-- 2.5
-- tCRD + 50
-- 225
-- 100
600 --
600 --
-- 50
Delay Time Between WR and RD Pulses
9, 10, 11
tRD
700
--
Data Access Time (WR-RD Mode)
9, 10, 11
tACC1
--
250
RD to INT Delay
9, 10, 11
tR1
--
225
WR to INT Delay
9, 10, 11
tINTL
--
1700
Data Access Time (WR-RD Mode)
9, 10, 11
tACC2
--
110
WR to INT Delay (Stand-Alone Operation)
9, 10, 11
tIHWR
--
150
Data Access Time After INT (Stand-Alone Operation
9, 10, 11
tID
--
75
1. Sample tested at 25°C to ensure compliance. Only on process design change.
UNIT
ns
ns
ns
µs
ns
ns
ns
ns
ns
µs
ns
ns
ns
ns
ns
ns
ns
09.09.03 Rev 3
All data sheets are subject to change without notice 5
©2003 Maxwell Technologies
All rights reserved.
5 Page 
Microprocessor-compatible 8-Bit ADC
FIGURE 11. OUTPUT CURRENT VS. TEMPERATURE
7820
FIGURE 12. OPERATING SEQUENCE (WR-RD MODE)
09.09.03 Rev 3
All data sheets are subject to change without notice 11
©2003 Maxwell Technologies
All rights reserved.
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet 7820.PDF ] | |
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