7672 MAXWELL | Alldatasheet

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All data sheets are subject to change without notice (858) 503-3300 - Fax: (858) 503-3301 - www.maxwell.com 12-Bit A/D Converter 7672 ©2002 Maxwell Technologies All rights reserved.

08.09.02 Rev 13

FEATURES:

  • 12-bit high speed A/D converter
  • R AD-PAK® radiation-hardened against natural space radia- tion
  • 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 DESCRIPTION: Maxwell Technologies’ 7672 high-speed 12-bit analog-to- digital converter microcircuit features a greater than 100 krad (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 refer- ence 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 refer- ence can be used. For optimal pr ecision, a high accuracy ref- erence 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 micro- processors. Maxwell Technologies' patented R AD-PAK® packaging technol- ogy incorporates radiation shie lding in the microcircuit pack- age. It eliminates the need for box shielding while providing the required radiation shielding fo r a lifetime in orbit or space mission. In a GEO orbit, R AD-PAK provides greater than 100 krad (Si) radiation dose toleranc e. This product is available with screening up to Class S. 12-BIT DAC+ - + SUCCESSIVE APPROXIMATION REGISTER CONTROL LOGIC CLOCK OSCILLATOR 12-BIT LATCH THREE-STATE OUTPUT DRIVERS 2 1 24 4 11 12 13 163 VREF AIN1 AIN2 VDD VSS BUSY CS RD CLK OUT CLK IN D0D3DGNDD4D11AGND Logic Diagram

TABLE 1. 7672 PINOUT DESCRIPTION

1 AIN1 Analog Input

3 AGND Analog Ground

12 DGND Digital Ground

17 CLKIN Clock Input

18 CLKOUT Clock Output

20 CS CHIP SELECT

21 BUSY BUSY

22 V SS Negative Supply, -12V

23 V DD Positive Supply, +5V

24 AIN2 Analog Input

TABLE 2. 7672 ABSOLUTE MAXIMUM RATINGS

TABLE 3. 7672 RECOMMENDED OPERATING CONDITIONS TABLE 4. 7672 DC ELECTRICAL CHARACTERISTICS

TABLE 5. 7672 TIMING CHARACTERISTICS 1,2

  1. 1LSB = FS/4096; T A = 25 °C; Performance over power supply tolerance is guaranteed by power supply rejection test.
  2. All inputs are 0V to +5V swing with t r = tr = 5ns (10 to 90% of +5V) and timed from a voltage level of +1.6V.
  3. t3 and t6 are measured with the load circuits of Figure 1 and are defined as the time required for an output to cross +0.8 or
  4. t7 is defined as the time required for the data lines to change 0.5V when loaded with the circuit of Figure 2.

TABLE 4. 7672 DC ELECTRICAL CHARACTERISTICS

FIGURE 1. LOAD CIRCUITS FOR ACCESS TIME FIGURE 2. LOAD CIRCUIT FOR BUS RELINQUISH TIME

FIGURE 4. ANALOG INPUT RANGE CONFIGURATIONS

FIGURE 5. UNIPOLAR OPERATING USING A REFERENCE

8All data sheets are subject to change without notice ©2002 Maxwell Technologies All rights reserved. 12-Bit A/D Converter 7672 Note: All dimensions in inches

24 PIN RAD-PAK® DUAL IN LINE PACKAGE

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 -- -- N2 4

9All data sheets are subject to change without notice ©2002 Maxwell Technologies All rights reserved. 12-Bit A/D Converter 7672 Note: All dimensions in inches

24 PIN RAD-PAK® FLAT PACKAGE

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 -- N2 4

10All data sheets are subject to change without notice ©2002 Maxwell Technologies All rights reserved. 12-Bit A/D Converter 7672 Important Notice: These data sheets are created using the chip manufacturer’s published specifications. Maxwell Technologies verifies functionality by testing key parameters either by 100% testing, sample testing or characterization. The specifications presented within these data sheets represent the latest and most accurate information available to date. However, these specifications are subject to change without notice and Maxwell Technologies assumes no responsibility for the use of this information. Maxwell Technologies’ products are not authorized for use as critical components in life support devices or systems without express written approval from Maxwell Technologies. Any claim against Maxwell Technologies must be made within 90 days from the date of shipment from Maxwell Tech- nologies. Maxwell Technologies’ liability shall be limited to replacement of defective parts.

11All data sheets are subject to change without notice ©2002 Maxwell Technologies All rights reserved. 12-Bit A/D Converter 7672 Feature Option Details7672 RP F X Screening Flow Package Radiation Feature Base Product Nomenclature Monolithic S = Maxwell Class S B = Maxwell Class B I = Industrial (testing @ -55°C, +25°C, +125°C) E = Engineering (testing @ +25°C D = Dual In-line Package (DIP) F = Flat Pack RP = R AD-PAK® package 12-Bit A/D Converter -XX Access Time 05 = 5 us