Real Time Devices AD1200 User Manual page 80

AD1200/ADA1200 Characteristics rypical @ 2so c
lnterface
Switch-selectable base address, l/O mapped
Jumper-selectable interrupts & DMA channel
Analog lnput
16 single-ended inputs
Input impedance, each channel........
.............>10 megohms
Gain............. .................... resistor configurable
Input ranges .............i5, 110, or 0 to +10 vohs
Guaranteed linearity across input ranges
.....t5, t9.5, and 0 to +9.5 vohs
Overvoltage protection
..135 Vdc
Settling time (gain = 1) .....
...5 Fsec, max
A/D Converter...............
..AD678
Type ............ ........... Successive approximation
Resolution
..........12 bits (2.214 mV @ 10V;4.88 mV @ 20V)
Linearity
.11 bit, typ
Conversion speed ..........
................5
psec, typ
Throughput
125 kHz
Pacer Clock
Range (using on-board I MHz clock) ...........
..............9
minutes to 5 psec
Digital l/O .............
CMOS 82C55
Number of lines
......................16
Logic compatibility ............ .............TTUCMOS
(Conf ig u rable with optional l/O pull-up/pul l-down resistors)
High-fevel output voltage................... ....................4.2V, min
Low-level output voltage ..................
..................0.45V, max
High-level input voltage ..2.2V, min; 5.5V, max
Low-level input voltage
.-0.3V, min; 0.8V, max
Input load currenl
............+10
pA
Input capacitance,
C(|N)@F=1MHz ................
..................10
pF
Output capacitance,
C(OUT)<@F=1MHz .......20 pF
D/A Converter (ADA1200 Only)
......AD7237
Analog outputs
..,,......2 channels
Resolution
...12 bits
Output ranges
.....0 to +5, t5, or 0 to +10 vohs
Guaranteed linearity across output ranges ....................0
to +5, t5, and 0 to +9.2 vohs
Relative accuracy......
t1 bit, max
Full-scale accuracy
.t5 bits, max
Non-linearity.
.............11 bit, max
Settling time .............
..................10
psec, max
Timer/Counters ...........
cMos 82cs4
Three 16-bit down counlers (2 cascaded, 1 independent)
6 programmable operating modes
Counter input source
...........External clock (8 MHz, max) or
on-board 8-MHz clock
Counter outputs
Available externally; used as PC interrupts
Counter gate source..
........External
gate or always enabled
Miscellaneous lnputs/Outputs (PC bus-sourced)
t5 volts,112 volts, ground
Current Requirements
140 mA @ +5 vohs; 32 mA @ +12 volts; 30 mA @ -12 volts
A-3