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Part: 7805ALPRPD
Category:
Data Conversion
-> ADC (Analog to Digital Converters)
Description: 16-bit Latchup Protected ADC
Company: Maxwell Technologies
Datasheet: Download 7805ALPRPD datasheet File size : 415 kB
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Datasheet text preview:
16-Bit Latchup Protected ADC
7805ALP
VIN A GND 1 REF CAP A GND 2 D15(MSD) D14 D13 D12 D11 D10 D9 D8 D GND
1
28
VS DECPLNG BUSY CS R/C STATUS D 0 ( LS D) D1 D2 D3 D4 D5
7805ALP
14
15
D6 D7
Logic Diagram
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FEATURES:
· 16-bit organization · Latchup Protection TechnologyTM · RAD-PAK® radiation-hardened against natural space radiation · Total dose hardness: - > 50 krads(Si), depending upon space mission · Latchup converted to reset. - Rate based on cross section and mission. · Package: - 28 pin RAD-PAK® flat pack - 28 pin RAD-PAK® DIP · 100 kHz min sampling rate · Standard ± 10V input range · Advance CMOS technology - 86 dB min SINAD with 20 kHz input - Single 5V supply operation - Utilizes internal or external reference - Full parallel data output - Power dissipation: 132 mW max
DESCRIPTION:
Maxwell Technologies' 7805ALP high-speed analog-to-digital converter features a greater than 50 krad (Si) total dose tolerance, depending upon space mission. Using Mawell's radiation-hardened RAD-PAK® packaging technology, the 7805ALP incorporates the commercial ADS 7805 from Burr Brown. This device is latchup protected by Maxwell Technologies' LPTTM technology. The 7805ALP, 16-bit sampling A/D using state-of-the-art CMOS structure. The device contains a complete 16-bit capacitor-based SAR A/D with S/H, reference, clock, interface for microprocessor use, and threestate output drivers. The 7805ALP is specified at a 100 kHz sampling rate, and guaranteed over the full temperature range. Laser-trimmed scaling resistors provide an industry-standard ± 10V input range, while the innovative design allows operation from a single 5V supply, with power dissipation of under 132 mW. Maxwell Technologies' patented RAD-PAK® packaging technology incorporates radiation shielding in the microcircuit package. It eliminates the need for box shielding while providing the required radiation shielding for a lifetime in orbit or space mission.
07.01.02 Rev 7
(858) 503-3300 Fax: (858) 503-3301- www.maxwell.com
All data sheets are subject to change without notice
1
©2001 Maxwell Technologies All rights reserved.
16-Bit Latchup Protected ADC
TABLE 1. 7805ALP PINOUT DESCRIPTION
PIN NUMBER 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 NAME VIN AGND1 R EF C AP AGND2 D15 (MSB) D14 D13 D12 D11 D10 D9 D8 DGND D7 D6 D5 D4 D3 D2 D1 D0 (LSB) STATUS* R/C CS BUSY DECPLNG VS 0 0 0 0 0 0 0 0 0 I I 0 0 0 0 0 0 0 0 0 DIGITAL I/O DESCRIPTION Analog input. Analog ground. Used internally as ground reference point. Reference input/output. 2.2 µF tantalum capacitor to ground
7805ALP
Reference buffer capacitor. 2.2 µF tantalum capacitor to ground. Analog ground. Data bit 15. Most Significant Bit (MSB) of conversion results. When STATUS is HIGH*, D15 must not be driven high. Data bit 14. When STATUS is HIGH*, D14 must not be driven high. Data bit 13. When STATUS is HIGH*, D13 must not be driven high. Data bit 12. When STATUS is HIGH*, D12 must not be driven high. Data bit 11. When STATUS is HIGH*, D11 must not be driven high. Data bit 10. When STATUS is HIGH*, D10 must not be driven high. Data bit 9. When STATUS is HIGH*, D9 must not be driven high. Data bit 8. When STATUS is HIGH*, D8 must not be driven high. Digital Ground Data bit 7. When STATUS is HIGH*, D7 must not be driven high. Data bit 6. When STATUS is HIGH*, D6 must not be driven high. Data bit 5. When STATUS is HIGH*, D5 must not be driven high. Data bit 4. When STATUS is HIGH*, D4 must not be driven high. Data bit 3. When STATUS is HIGH*, D3 must not be driven high. Data bit 2. When STATUS is HIGH*, D2 must not be driven high. Data bit 1. When STATUS is HIGH*, D1 must not be driven high. Data bit 0. Least Significant Bit (LSB) of conversion results. When STATUS is HIGH*, D0 must not be driven high. STATUS when HIGH indicates latchup protection is active and output data is invalid. Capacitive loading should not exceed 1000 pF. With CS LOW and BUSY HIGH, a falling edge of R/C initiates a new conversion. When STATUS is HIGH*, CS and R/C must not be driven high. Internally OR'd with R/C. If R/C LOW, a falling edge on CS initiates a new conversion. When STATUS is HIGH*, CS and R/C must not be driven high. At the start of a conversion, BUSY goes LOW and stays LOW until the conversion is completed and the digital outputs have been updated. Supply voltage high speed decoupling pin. Decouple to ground with 1.0 µF ceramic capacitor. Supply input. Nominally 5V. Decouple to ground with 10 µF tantalum capacitor.
Memory
07.01.02 REV 7
(858) 503-3300 Fax:(858)503-3301 www.maxwell.com
All data sheets are subject to change without notice
2
©2001 Maxwell Technologies All rights reserved.
16-Bit Latchup Protected ADC
TABLE 2. 7805ALP ABSOLUTE MAXIMUM RATINGS
(VS=5V, TA = -40 TO +85 °C UNLESS OTHERWISE SPECIFIED)
7805ALP
SYMBOL Analog Inputs VI N CAP REF D GND AG ND1 AG ND2 VS
MIN -25 VS 9 -0.3 -0.3 -0.3 --0.3 --
TYP ------7 ----
MAX 25 AGND2 - 0.3 -0.3 0.3 0.3 VS + 0.3 825 165 V
Ground Voltage Difference
V
Supply Input Digital Inputs Internal Power Dissipation Maximum Junction Temperature
V V mW
°C
TJ
--
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TABLE 3. 7805ALP ANALOG INPUTS (VS= 5V, TA = -40 TO +85 °C UNLESS OTHERWISE SPECIFIED)
PARAMETER Voltage Ranges 1 Impedance Capacitance 1. Tested by application of signal. SUB GROUP 1, 2, 3 MIN - 10 --TYP ±10 23 35 MAX 10 --UNIT V k pF
TABLE 4. 7805ALP THROUGHPUT SPEED (VS = 5V, TA = -40 TO +85 °C UNLESS OTHERWISE SPECIFIED)
PARAMETER Conversion Time Complete Cycle (Acquire and Convert) Throughput Rate 1. Not tested.
1
SUB GROUP S 9, 10, 11 9, 10, 11 9, 10, 11
MIN --100
TYP 7.6 ---
MAX 8 10 --
UNIT µs µs kHz
TABLE 5. 7805ALP AC ACCURACY SPECIFICATIONS
( VS = 5V, TA = -40 TO +85 °C UNLESS OTHERWISE SPECIFIED) TEST CONDITIONS fIN = 45 kHz fIN = 45 kHz
1,2
PARAMETER Spurious-Free Dynamic Range 1,2 Total Harmonic Distortion
SUB GROUP S 4, 5, 6 4, 5, 6
MIN 90 --
TYP ---
MAX -- 90
UNIT dB dB
07.01.02 REV 7
(858) 503-3300 Fax:(858)503-3301 www.maxwell.com
All data sheets are subject to change without notice
3
©2001 Maxwell Technologies All rights reserved.
16-Bit Latchup Protected ADC
TABLE 5. 7805ALP AC ACCURACY SPECIFICATIONS
(VS= 5V, TA = -40 TO +85 °C UNLESS OTHERWISE SPECIFIED) TEST CONDITIONS fIN = 45 kHz -60dB Input Signal-to-Noise
1,2 3
7805ALP
SUB GROUP S 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 MIN 83 -83 -TYP -30 -250 MAX ----dB kHz UNIT dB
PARAMETER Signal-to-(Noise + Distortion) 1,2
fIN = 45 kHz
Full-Power Bandwidth
1. All specifications in dB are referred to a full-scale 10V input. 2. Guaranteed by design. 3. Full-power bandwidth defined as full-scale input frequency at which signal-to-(noise + distortion) degrades to 60 dB or 10 bits of accuracy.
TABLE 6. 7805ALP SAMPLING DYNAMICS ( VS = 5V, TA = -40 TO +85 °C UNLESS OTHERWISE SPECIFIED)
PARAMETER Aperture Delay Transient Response Overvoltage Recovery 1 1. Recovers to specified performance after 2 x fS input overvoltage. FS Step TEST CONDITIONS MIN ---TYP 40 2 150 MAX ---U NIT nS µS nS
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TABLE 7. 7805ALP REFERENCE (VS = 5V, TA = -40 TO +85 °C UNLESS OTHERWISE SPECIFIED)
PARAMETER Internal Reference Voltage Internal Reference Source Current (Must use external buffer) Internal Reference Drift External Reference Voltage Range for Specified Linearity 1 External Reference Current Drain 2 1. Tested by application of signal. 2. Not tested. SU B G R O U P 1, 2, 3 MIN 2.48 ----TYP 2.5 1 8 2.5 -MAX 2.52 ---100 UNIT V µA ppm/°C V µA
TABLE 8. 7805ALP DIGITAL OUTPUTS (VS = 5V, TA = -40 TO +85 °C UNLESS OTHERWISE SPECIFIED)
PARAMETER Data Formatting Data Coding TEST CONDITIONS SU B G R O U P MIN TYP MAX U NIT (Parallel 16-bits Binary Two's Complement) Binary Two's Complement
07.01.02 REV 7
(858) 503-3300 Fax:(858)503-3301 www.maxwell.com
All data sheets are subject to change without notice
4
©2001 Maxwell Technologies All rights reserved.
16-Bit Latchup Protected ADC
TABLE 8. 7805ALP DIGITAL OUTPUTS (VS = 5V, TA = -40 TO +85 °C UNLESS OTHERWISE SPECIFIED)
PARAMETER VO L VO H Leakage Current Output Capacitance TEST CONDITIONS (ISINK = 1.6mA) 4.0 (ISOURCE = -400 µA) High-Z State, VOUT = 0V to VS High-Z State SU B G R O U P 1, 2, 3 1, 2, 3 1, 2, 3 MIN -4.0 --TYP ---10
7805ALP
MAX 0 .4 -±5 -U NIT V V µA pF
TABLE 9. 7805ALP POWER SUPPLIES (VS = 5V, TA = -40 TO +85 °C UNLESS OTHERWISE SPECIFIED)
PARAMETER VS IS Power Dissipation fS = 100 kHz 1, 2, 3 TEST CONDITIONS SUB GROUP MIN 4.8 --TYP 5 20.3 102 MAX 5.25 -132.0 UNIT V mA mW
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TABLE 10. 7805ALP DIGITAL TIMING (VS = 5V, TA = -40 TO +85 °C UNLESS OTHERWISE SPECIFIED)
PARAMETER Bus Access Time Bus Relinquish Time SU B G R O U P 9, 10, 11 9, 10, 11 MIN --TYP --MAX 83 83 UNIT nS nS
TABLE 11. 7805ALP TEMPERATURE (VS = 5V, TA = -40 TO +85 °C UNLESS OTHERWISE SPECIFIED)
PARAMETER Specified Performance Derated Performance 1 Storage 1. Tested by application of signal. MIN -40 -55 -65 TYP ---MAX 85 125 150 U NIT
°C °C °C
(VS = 5V, TA = -40 TO +85 °C UNLESS OTHERWISE SPECIFIED) DESCRIPTION Convert pulse width Data valid delay after R/C low BUSY delay from R/C low SYMBOL t1 t2 t3
07.01.02 REV 7
(858) 503-3300 Fax:(858)503-3301 www.maxwell.com
TABLE 12. 7805ALP CONVERSION TIMING1
SU B G R O U P 9, 10, 11 9, 10, 11 9, 10, 11
MIN 40 ---
TYP ----
MAX 7000 8 85
UNIT ns µs ns
All data sheets are subject to change without notice
5
©2001 Maxwell Technologies All rights reserved.
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