7672 Datasheet, PDF (1/11 Pages) Maxwell Technologies – 12-Bit A/D Converter

7672
12-Bit A/D Converter
V_REF
2
+
-
12-BIT DAC
AIN1
1
AIN2
24
+
-
23 VDD
22 VSS
3
4
AGND D11
SUCCESSIVE APPROXIMATION
REGISTER
21 BUSY
12-BIT LATCH
CONTROL
LOGIC
20 CS
THREE-STATE
OUTPUT DRIVERS
11
12
13
16
D4
DGND
D3
D0
Logic Diagram
19 RD
CLOCK
OSCILLATOR
18 CLK OUT
17 CLK IN
FEATURES:
• 12-bit high speed A/D converter
• RAD-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
- SEU_TH > 5.8 Mev/mg/cm²
- SEU_Sat = -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 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 precision, 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 RAD-PAK® packaging technol-
ogy incorporates radiation shielding in the microcircuit pack-
age. 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-to-
digital converter microcircuit features a greater than 100 k0r8a.0d9.02 Rev 13
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All data sheets are subject to change without notice 1
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