Integral Linearity error (Bipolar)
±1.5 LSB
No missing codes guaranteed
16 bits
Gain drift (A/D specs)
±7 ppm/°C
Zero drift (A/D specs)
±2 ppm/°C
Input leakage current
250 nA max
Input impedance
10 MegOhms min
Absolute maximum input voltage
±35V
Digital Input / Output
Digital Type
Output
74LS197
Input
74LS244
Configuration
4 fixed input, 4 fixed output
Number of channels
8
Output High
2.7 volts @ -0.4 mA min
Output Low
0.5 volts @ 8 mA max
Input High
2.0 volts min, 7 volts absolute max
Input Low
0.8 volts max, -0.5 volts absolute min
Counter Section
Counter type
82C54
Configuration
3 down counters, 16 bits each
Counter 0 - Independent, user configurable
Source: Programmable - Internal 100 kHz or external (CTR0 Clock In)
Gate:
External (DIn2)
Output: Available at user connector (CTR0 Out)
Counter 1 - ADC Pacer Lower Divider
Source: 1 or 10 MHz oscillator (jumper-selectable)
Gate:
Tied to Counter 2 gate, programmable source.
Output: Chained to Counter 2 Clock.
Counter 2 - ADC Pacer Upper Divider
Source: Counter 1 Output.
Gate:
Tied to Counter 1 gate, programmable source.
Output: ADC Pacer clock, hard-wired to user connector, Ctr2 out.
Clock input frequency
10 MHz max
High pulse width (clock input)
30 ns min
Low pulse width (clock input)
50 ns min
Gate width high
50 ns min
Gate width low
50 ns min
Input low voltage
0.8V max
Input high voltage
2.0V min
Output low voltage
0.4V max
Output high voltage
3.0V min
Environmental
Operating temperature range
0 to 50°C
Storage temperature range
-20 to 70°C
Humidity
0 to 90% non-condensing
Power Consumption
+5V
1.4A typical, 2.1A max
-24-
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