
Chapter 4
Specifications
Typical for 25 °C unless otherwise specified.
Specifications in italic text are guaranteed by design.
Analog output
Table 1. Analog output specifications
D/A type AD660BN
Resolution 16-bits
Number of channels 6 Max, 2 Installed
Voltage ranges ±5
Offset error ±7 mV max
Gain error ±5 LSB max
Differential nonlinearity ±1LSB max
Integral nonlinearity ±1LSB max
Monotonicity Guaranteed monotonic to 15 bits over temperature
Gain drift ±15 ppm/°C max
Bipolar offset drift ±5 ppm/°C max
Unipolar offset drift ±3 ppm/°C max
Settling time (20 V step to .0008%) 13 µs max
Settling time (10 V step to .0008%) 6 µs typ
Current drive ±5 mA min
Output short-circuit current 25 mA typ
D/A pacing Software paced
Data transfer Programmed I/O
Throughput PC dependent
Miscellaneous
Double buffered output latches
Update DACs individually or simultaneously (jumper selectable)
Power up and reset, all DAC's cleared to 0 volts
Digital input / output
Table 2. DIO specifications
Digital type 8255 emulation
Output 74S244
Input 74LS373
Number of channels 24 I/O
Configuration 2 banks of 8, 2 banks of 4, programmable by bank as input or output
Output high 2.4 volts min @ –15 mA
Output low 0.5 volts max @ 64 mA
Input high 2.0 volts min, 7 volts absolute max
Input low 0.8 volts max, –0.5 volts absolute min
Power-up / reset state Input mode (high impedance)
15
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