7672 12-Bit A/D Converter VREF AIN1 AIN2 2 1 24 + - 12-BIT DAC + - SUCCESSIVE APPROXIMATION REGISTER 12-BIT LATCH CONTROL LOGIC THREE-STATE OUTPUT DRIVERS CLOCK OSCILLATOR 3 4 11 12 13 16 AGND D11 D4 DGND D3 D0 23 VDD 22 VSS 21 BUSY 20 CS 19 RD 18 CLK OUT 17 CLK IN 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 08.09.02 Rev 13 (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: 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 to DGND -- -0.3 VDD +0.3 V AIN1, AIN2 to AGND -- -15 +15 V Digital Input Voltage to DGND VIN -0.3 VDD +0.3 V VOUT -0.3 VDD +0.3 V VREF to AGND -- VSS -0.3 VDD +0.3 V Power Dissipation to +75°C PD -- 1000 mW Power Dissipation above 75°C (Derate) -- -- 10 mW/°C Thermal Impedance ΘJC -- 3.24 °C/W Storage Temperature Range TSTG -65 +150 °C TA -55 +125 °C Digital Output Voltage to DGND Operating Temperature Range 08.09.02 REV 13 All data sheets are subject to change without notice 2 ©2002 Maxwell Technologies All rights reserved. 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 V Output High Voltage VOH ISOURCE = -200 µA 1, 2, 3 4.0 -- V Input Leakage Current IIN (CS,RD) VIN = VDD or GND (CLKIN) VIN = VDD or GND 1, 2, 3 --- ±10 ±20 µA Output Leakage Current ILKG (D0-D11) VOUT = VDD or GND 1, 2, 3 -- ±10 µA Input Capacitance 1 CIN -- 10 pF COUT -- 15 pF 1, 2, 3 --- 7 -12 mA Floating State Output Capacitance2 Power Supply Current IDD ISS Power Supply Rejection, VDD PSRR (VDD) VDD = 4.75 to 5.25 volts VSS = -12V 1, 2, 3 -- ±1 LSB Power Supply Rejection, VSS PSRR (VSS) VSS = -10.8 to -13.2 volts VDD = 5V 1, 2, 3 -- ±1 LSB 1, 2, 3 --- ±3.5 ±1.75 mA Analog Input Current (AIN1 or AIN2) IAIN VREF Input Range 1 VREF 1, 2, 3 -5.05 -4.95 V VREF Input Current IREF 1, 2, 3 -- ±3 µA Resolution RES TA = -55 to +125°C 1, 2, 3 12 -- bits Integral Nonlinearity INL TA = +25 °C TA = -55 to +125°C 1 2, 3 --- ±1 ±1 LSB Differential Nonlinearity DNL 12 bits, no missing codes TA = -55 to +125°C 1, 2, 3 -- ±0.9 LSB Unipolar Offset Error UOE TA = +25°C TA = -55 to +125°C 1 2, 3 --- ±5 ±6 LSB Unipolar Gain Error UGE TA = +25 °C TA = -55 to +125°C 1 2, 3 --- ±5 ±7 LSB Unipolar Range: 0 to 5 V, 10V Bipolar Range: ±5V 08.09.02 REV 13 All data sheets are subject to change without notice Memory Input Low Voltage 3 ©2002 Maxwell Technologies All rights reserved. 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 Clk, 3 12.5 clks, TA = -55 to +125 °C 9, 10, 11 tCONV -- 5.0 us Conversion Time, Asynchronous Clk, 12-13 clks, TA = -55 to +125 °C 9, 10, 11 tCONV 4.8 5.2 us CS to RD Setup Time TA = -55 to +125 °C 9, 10, 11 t1 0 -- ns RD to BUSY Delay CL = 50 pF, TA = +25 °C CL = 50 pF, TA = -55 to +125 °C 9 10, 11 t2 --- 190 270 ns Data Access Time 4 CL = 100 pF, TA = +25 °C CL = 100 pF, TA = -55 to +125 °C 9 10, 11 t3 --- 125 170 ns RD Pulse Width TA = -55 to +125 °C 9, 10, 11 t4 t3 -- ns CS to RD Hold Time TA = -55 to +125 °C 9, 10, 11 t5 0 -- ns Data Setup Time After BUSY4 CL = 100 pF, TA = +25 °C CL = 100 pF, TA = -55 to +125 °C 9 10, 11 t6 -- --- 70 100 ns Bus Relinguish Time5 (TA = +25 °C) (-55 < TA < +125 °C) 9 10, 11 t7 --- 75 90 ns Delay Between Read Operations (-55 < TA < +125 °C) 9, 10, 11 t8 200 -- ns Memory SUBGROUPS 1. 1LSB = FS/4096; TA = 25 °C; Performance over power supply tolerance is guaranteed by power supply rejection test. 2. All inputs are 0V to +5V swing with tr = tr = 5ns (10 to 90% of +5V) and timed from a voltage level of +1.6V. 3. Functionally tested. 4. 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 +2.4. 5. t7 is defined as the time required for the data lines to change 0.5V when loaded with the circuit of Figure 2. 08.09.02 REV 13 All data sheets are subject to change without notice 4 ©2002 Maxwell Technologies All rights reserved. 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. 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. 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. 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. 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. 7672 12-Bit A/D Converter 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 Technologies. Maxwell Technologies’ liability shall be limited to replacement of defective parts. Memory 08.09.02 REV 13 All data sheets are subject to change without notice 10 ©2002 Maxwell Technologies All rights reserved. 7672 12-Bit A/D Converter Product Ordering Options Model Number 7672 RP F X -XX Option Details Feature 05 = 5 us Screening Flow Monolithic S = Maxwell Class S B = Maxwell Class B I = Industrial (testing @ -55°C, +25°C, +125°C) E = Engineering (testing @ +25°C) Package D = Dual In-line Package (DIP) F = Flat Pack Radiation Feature RP = RAD-PAK® package Base Product Nomenclature 12-Bit A/D Converter 08.09.02 REV 13 All data sheets are subject to change without notice Memory Access Time 11 ©2002 Maxwell Technologies All rights reserved.