Measurement Computing 6224 - Manual (Page 38)

6224 User’s Manual Specifications 9-1
Specifications
– 6224
9
The following specifications are typical for the range –40 to 50°C, unless otherwise noted.
Input Characteristics
Number of analog channels ................................................ 12
Bridge completion
Full and half ................................................................ Internal
Quarter ......................................................................... External
ADC resolution ................................................................... 24 bits
Type of ADC ...................................................................... Delta-sigma (with analog pre-filtering)
Sampling mode ................................................................... Simultaneous
Data rates ( ) ..................................................................... (50kS/s)/ = 1, 2, ... 31.
Multiple device, channel sync skew 1 .................................. 1 Sample Period
Single device, channel-to-channel
matching (calibrated) .................................................... 350nS (max)
Master timebase (internal)
Frequency ........................................................................... 12.8 MHz
Accuracy ............................................................................. 100 ppm max
Nominal full-scale range 25 mV/V
Scaling coefficient ............................................................. 2.9802 nV/V per LSB
Overvoltage protection between any two terminals ........... 30 V
Accuracy
Measurement Conditions*
Percent of
Reading Offset
Calibrated, max (–40 to 50 °C) 0.20% 0.0625 mV/V
Calibrated, typ (25 °C, ±5 °C) 0.05% 0.0125 mV/V
* Excluding offset null or shunt calibration.
Gain drift………………………………… ......................... 10 ppm/°C max
Offset drift
2.5 V excitation ................................... ....................... 0.6
µV/V per °C
3.3 V excitation ................................... ....................... 0.5
µV/V per °C
5 V excitation ...................................... ....................... 0.3
µV/V per °C
10 V excitation .................................... ....................... 0.2
µV/V per °C
Channel-to-channel matching (calibrated)
1
Input Signal Frequency (fin)
Gain
Typical Maximum
0 to 1 kHz 0.15% 0.3%
1 to 20 kHz 0.4% 1.1%
Phase nonlinearity
0 to 1 kHz 0.001°
0 to 20 kHz 0.1°
Input delay ......................................................................... 4.8
µs + 38.4/
Refer to the synchronization section of chapter 1 for information regarding multiple devices.