AXM-
A75 User’s Manual
Multifunction I/O Mezzanine Board
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Gain Error (all gains)
3
.................... 0.01
typical, 0.1
maximum
Gain vs. Temperature .................... 3 ppm/°C typical
10 pm/°C maximum
Difference Amplifier
Device ............................................ TI INA159
Gain Error ...................................... ±0.005% typical
±0.024% maximum
Gain Error vs. Temperature .......... ±1 ppm/°C typical
Offset Error ................................... ±100 µV typical
±500 µV maximum
Offset Voltage vs. Temperature .... ±1.5 µV/°C typical
Reference Divider Accuracy .......... ±0.002% typical
±0.024% maximum
Voltage Reference REF3240
Device ............................................ TI REF3240
Accuracy ........................................ 0.01% typical
±0.2% maximum
Output Voltage Temperature Drift 4 ppm/°C typical
7 ppm/°C maximum
Thermal Hysteresis
4
...................... 100 ppm first cycle
25 ppm additional cycles
Noise ............................................. 78 µV RMS typical
Analog to Digital Converter
ADC ................................................ ADI AD7686
A/D Resolution .............................. 16-bits
Data Format .................................. straight binary
No Missing Codes .......................... no missing codes 15-bits
A/D Integral Linearity Error ...........
0.6 LSB typical
2 LSB maximum
Offset Error ...................................
0.1 mV typical
10 V range
1.6 mV maximum
Gain Error Temperature Drift .......
0.3 ppm/°C typical
Offset Temperature Drift ..............
0.3 ppm/°C typical
Full Scale Error ..............................
0.5
maximum
A/D Conversion Time .................... 2
S maximum
Conversion Rate ............................ 500 kHz maximum
Input Noise .................................... 2 LSB rms typical
3
Software calibration eliminates these error components
4
Acromag does not temperature cycle this product before shipping to customers. If the product is operated at the
extremes of its temperature range, the voltage reference could drift by the amount specified for first cycle.