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7809LP Schematic ( PDF Datasheet ) - Maxwell Technologies

Teilenummer 7809LP
Beschreibung 16-Bit Latchup Protected Analog to Digital Converter
Hersteller Maxwell Technologies
Logo Maxwell Technologies Logo 




Gesamt 23 Seiten
7809LP Datasheet, Funktion
7809LP
16-Bit Latchup Protected
Analog to Digital Converter
20 k
R1IN
10 k
R2IN
5 k
R3IN
20 k
CAP
REF
R/C
Buffer
CS POWER DOWN
Successive Approximation Register and Control Logic
CDAC
Clock
Comparator
Serial Data
Out
BUSY
Data
Clock
Serial
Data
Internal
+2.5V Ref.
4 k
Logic Diagram
FEATURES:
• RAD-PAK® radiation-hardened against natural
• space radiation
• Total dose hardness:
- > 100 krad (Si), depending upon space mission
• Latch-up Protection Technology (LPTTM)
• SEL converted into a reset
- Rate based on cross section and mission
• Same footprint as ADS7809
• Package: 24 pin RAD-PAK flat package
• 100 kHz min sampling rate
• ±10 V and 0 V to 5 V input range
• DNL: 15-bits “No Missing Codes”
• 83 dB min SINAD with 20 kHz input
• Single +5 V supply operation
• Utilizes internal or external reference
• Serial output
• Power dissipation: 132 mW max
DESCRIPTION:
Maxwell Technologies’ 7809LP high-speed 16-bit analog to
digital converter features a greater than 100 kilorad (Si) total
dose tolerance depending upon space mission. Using Max-
well’s radiation-hardened RAD-PAK® packaging technology, the
7809LP has the same footprint as ADS7809 and is latchup
protected by Maxwell Technologies’ Latchup Protection Tech-
nology (LPTTM). It is a 24 pin, 16-bit sampling analog-to-digital
converter using state-of-the-art CMOS structures. The
7809LP contains a 16-bit capacitor based SAR A/D with S/H,
reference, clock, interface for microprocessor use, and serial
output drivers. The 7809LP is specified at a 100kHz sampling
rate, and guaranteed over the full temperature range. Laser-
trimmed scaling resistors provide various input ranges include
±10 V and 0 to 5 V, while the innovative design allows opera-
tion from a single +5 V supply, with power dissipation of under
132 mW.
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 50
krad (Si) radiation dose tolerance. This product is available
with screening up to Maxwell Technologies self-defined Class
K.
01.11.05 Rev 7
(858) 503-3300- Fax: (858) 503-3301 - www.maxwell.com
All data sheets are subject to change without notice 1
©2005 Maxwell Technologies
All rights reserved.






7809LP Datasheet, Funktion
16-Bit Latchup Protected Analog to Digital Converter 7809LP
TABLE 9. 7809LP REFERENCE
(SPECIFIED PERFORMANCE -40 TO +85°C)
PARAMETER
CONDITIONS
MIN TYP MAX UNIT
Internal Reference Voltage
No Load
2.48 2.5 2.52
V
Internal Reference Source Current (Must be
ext. buffer)
-- 1 -- µ A
External Reference Voltage Range for Speci-
fied Linearity 1
2.3 2.5 2.7
V
External Reference Current Drain
Ext. 2.5000V Ref
--
-- 100 µ A
1. Tested by application of signal.
TABLE 10. 7809LP DIGITAL OUTPUTS
(SPECIFIED PERFORMANCE -40 TO +85°C)
PARAMETER
SUBGROUPS
CONDITIONS
MIN TYP MAX
Data Format
Data Coding
Pipeline Delay
Serial 16-bits
Binary Two’s Complement or Straight Binary
Conversion results only available after completed conversion
Data Clock
Selectable for internal or external data clock
Internal (Output Only When
9, 10, 11 EXT/INT Low
--
2.3
--
Transmitting Data)
EXT/INT High
0.1
--
10
External (Can Run Continually)
VOL
VOH
Leakage Current 1
Output Capacitance 1
1, 2, 3
1, 2, 3
1, 2, 3
ISINK = 1.6 mA
ISOURCE = 500 µ A
High-Z State,
VOUT = 0V to VDIG
High-Z State
--
4
--
--
-- 0.4
-- --
-- ±10
15 --
1. Not tested.
UNIT
MHz
V
µA
pF
PARAMETER
VDIG
VANA
IDIG
IANA
Power Dissipation
PWRD LOW
PWRD HIGH
TABLE 11. 7809LP POWER SUPPLIES
(SPECIFIED PERFORMANCE -40 TO +85°C)
SUBGROUPS
CONDITIONS
MIN TYP MAX UNIT
1, 2, 3
Must be < VANA
4.75
5
5.25
V
1, 2, 3
4.75 5 5.25 V
1, 2, 3
-- 0.3 -- mA
1, 2, 3
-- 16 -- mA
1, 2, 3
VANA = VDIG = 5V
fs = 100 kHz
--
--
mW
-- 132
-- 100
01.11.05 Rev 7
All data sheets are subject to change without notice 6
©2005 Maxwell Technologies
All rights reserved.

6 Page









7809LP pdf, datenblatt
16-Bit Latchup Protected Analog to Digital Converter 7809LP
FIGURE 5. OFFSET/GAIN CIRCUITS FOR UNIPOLAR INPUT RANGES
01.11.05 Rev 7
All data sheets are subject to change without notice 12
©2005 Maxwell Technologies
All rights reserved.

12 Page





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