7672 - ADC, 12 Bit, 100 kSPS - 11 Pages

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7672 - ADC, 12 Bit, 100 kSPS

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7672 12-Bit A/D Converter VREF AIN1 AIN2 2 1 24 + - 23 SUCCESSIVE APPROXIMATION REGISTER 12-BIT LATCH CONTROL LOGIC THREE-STATE OUTPUT DRIVERS CLOCK OSCILLATOR 3 4 11 12 13 D11 D4 DGND D3 BUSY 20 CS RD 18 CLK OUT 17 CLK IN 16 AGND VSS 21 + - 22 19 12-BIT DAC VDD D0 Logic Diagram • 12-bit high speed A/D converter • RAD-PAK® radiation-hardened against natural space radiation • Total dose hardness: - > 100 krad (Si), depending upon space mission • Excellent Single Event Effect - SEL > 120 Mev/mg/cm2 - SEUTH > 5.8 Mev/mg/cm2 - SEUSat = -1E-4 cm2/Device • Package: - 24 pin RAD-PAK® flat package - 24 pin RAD-PAK® DIP • Fast conversion times: - 7672-05: 5 µs • Low 110 mW typical power consumption - Corrects all single-bit errors - Detects all double and some triple-bit errors • High-speed BiCMOS technology - Choice of +5V and +10V input ranges - Operates with +5V and -12V power supplies - Fast 125 ns bus-access time (Si) total dose tolerance, depending upon space mission. The 7672 uses an accurate high-speed DAC and comparator to achieve conversion time as low as 5 µs while dissipating only 110 mW of power. The 7672 is designed to be used with an external reference voltage. This allows the user to choose a reference whose performance suits the application or to drive multiple 7672s from a single system reference, since the reference input is buffered and draws very little current. For digital signal processing applications where absolute accuracy and temperature coefficients may be unimportant, a low cost reference can be used. For optimal precision, a high accuracy reference where an absolute 12-bit accuracy can be obtained over a wide temperature range may be used. Analog input range is pin-selectable for 0 to +5V, 0 to +10V, or ±5V, making the ADC ideal for data acquisition and analog input/output cards. A high-speed digital interface (125 ns data access time) with three state data outputs is compatible with most microprocessors. 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. 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. DESCRIPTION: Maxwell Technologies’ 7672 high-speed 12-bit analog-todigital converter microcircuit features a greater than 100 krad Rev 13 08.09.02 (858) 503-3300 - Fax: (858) 503-3301 - www.maxwell.com All data sheets are subject to change without notice 1 ©2002 Maxwell Technologies All rights reserved. Memory FEATURES:

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7672 12-Bit A/D Converter TABLE 1. 7672 PINOUT DESCRIPTION PIN SYMBOL DESCRIPTION 1 AIN1 Analog Input 2 VREF Voltage-Reference Input 3 AGND Analog Ground 4-11 D11-D4 Three-State Data Outputs 12 DGND Digital Ground 13-16 D3-D0 Three-State Data Outputs 17 CLKIN Clock Input 18 CLKOUT Clock Output 19 RD READ Input 20 CS CHIP SELECT 21 BUSY 22 VSS Negative Supply, -12V 23 VDD Positive Supply, +5V 24 AIN2 Analog Input BUSY Memory TABLE 2. 7672 ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL MIN MAX UNITS Positive Supply Voltage to DGND VDD -0.3 7.0 V Negative Supply Voltage to DGND VSS -17 +0.3c V AGND...

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7672 12-Bit A/D Converter TABLE 3. 7672 RECOMMENDED OPERATING CONDITIONS PARAMETER SUBGROUPS SYMBOL MIN MAX UNITS Positive Supply Voltage 1 VDD 4.75 5.25 V Negative Supply Voltage 1 VSS -13.2 -10.8 V VREF Input Range 1 VREF -5.05 -4.95 V Power Dissipation VDD = 5V, VSS = -12V 1 PD -- 179 mW TABLE 4. 7672 DC ELECTRICAL CHARACTERISTICS (VDD = 5V ±5%, VSS = -12V ±10%, VREF = -5V, TA = -55 TO 125 °C UNLESS OTHERWISE SPECIFIED) PARAMETER SYMBOL TEST CONDITION SUBGROUPS MIN MAX UNITS VIL 1, 2, 3 -- 0.8 V Input High Voltage VIH 1, 2, 3 2.4 -- V Output Low Voltage VOL ISINK = 1.6 mA 1, 2, 3 -- 0.4...

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7672 12-Bit A/D Converter TABLE 4. 7672 DC ELECTRICAL CHARACTERISTICS (VDD = 5V ±5%, VSS = -12V ±10%, VREF = -5V, TA = -55 TO 125 °C UNLESS OTHERWISE SPECIFIED) PARAMETER SYMBOL TEST CONDITION SUBGROUPS MIN MAX UNITS Bipolar Zero Error BZE TA = +25°C TA = -55 to +125°C 1 2, 3 --- ±5 ±6 LSB Bipolar Gain Error BGE TA = +25°C TA = -55 to +125°C 1 2, 3 --- ±5 ±7 LSB 1. Guaranteed by design. TABLE 5. 7672 TIMING CHARACTERISTICS 1,2 (VDD = 5V ±5%, VSS = -12V ±10%, VREF = -5V, TA = -55 TO 125 °C UNLESS OTHERWISE SPECIFIED) PARAMETER TEST CONDITION SYMBOL MIN MAX UNITS Conversion Time, Synchronous...

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7672 12-Bit A/D Converter FIGURE 1. LOAD CIRCUITS FOR ACCESS TIME FIGURE 2. LOAD CIRCUIT FOR BUS RELINQUISH TIME Memory 08.09.02 REV 13 All data sheets are subject to change without notice 5 ©2002 Maxwell Technologies All rights reserved.

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7672 12-Bit A/D Converter FIGURE 3. FIGURE 4. ANALOG INPUT RANGE CONFIGURATIONS Memory 08.09.02 REV 13 All data sheets are subject to change without notice 6 ©2002 Maxwell Technologies All rights reserved.

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7672 12-Bit A/D Converter FIGURE 5. UNIPOLAR OPERATING USING A REFERENCE Memory 08.09.02 REV 13 All data sheets are subject to change without notice 7 ©2002 Maxwell Technologies All rights reserved.

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7672 12-Bit A/D Converter Memory 24 PIN RAD-PAK® DUAL IN LINE PACKAGE DIMENSION SYMBOL MIN NOM MAX A -- 0.167 0.200 b 0.014 0.018 0.026 b2 0.045 0.050 0.065 c 0.008 0.010 0.018 D -- 1.200 1.280 E 0.510 0.594 0.620 eA 0.600 BSC eA/2 0.300 BSC e 0.100 BSC L 0.135 0.145 0.155 Q 0.015 0.030 0.045 S1 0.005 0.025 -- S2 0.005 -- -- N 24 D24-02 Note: All dimensions in inches 08.09.02 REV 13 All data sheets are subject to change without notice 8 ©2002 Maxwell Technologies All rights reserved.

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7672 12-Bit A/D Converter Memory 24 PIN RAD-PAK® FLAT PACKAGE DIMENSION SYMBOL MIN NOM MAX A 0.153 0.170 0.183 b 0.015 0.017 0.022 c 0.004 0.005 0.009 D -- 0.596 0.640 E 0.350 0.400 0.420 E1 -- -- 0.450 E2 0.180 0.236 -- E3 0.030 0.082 -- e 0.050 BSC L 0.315 0.325 0.335 Q 0.026 0.050 0.056 S1 0.005 0.015 -- N 24 F24-01 Note: All dimensions in inches 08.09.02 REV 13 All data sheets are subject to change without notice 9 ©2002 Maxwell Technologies All rights reserved.

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