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Maxwell Technologies' 7672 high-speed 12-bit analog-todigital (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.
7672 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
Digital Output Voltage to DGND
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
JC
--
3.24
°C/W
Storage Temperature Range
TSTG
-65
+150
°C
Operating Temperature Range
TA
-55
+125
°C
7672 Features
• 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