USB-1208LS User's Guide Specifications
Table 1. Accuracy, differential mode
Range Accuracy (LSB)
±20 V 5.1
±10 V 6.1
±5 V 8.1
±4 V 9.1
±2.5 V 12.1
±2 V 14.1
±1.25 V 20.1
±1 V 24.1
Table 2. Accuracy, single-ended mode
Range Accuracy (LSB)
±10 V 4.0
Table 3. Accuracy components, differential mode - all values are (±)
Range % of Reading Gain Error at FS
(mV)
Offset (mV) Accuracy at FS (mV)
±20 V 0.2 40 9.766 49.766
±10 V 0.2 20 9.766 29.766
±5 V 0.2 10 9.766 19.766
±4 V 0.2 8 9.766 17.766
±2.5 V 0.2 5 9.766 14.766
±2 V 0.2 4 9.766 13.766
±1.25 V 0.2 2.5 9.766 12.266
±1 V 0.2 2 9.766 11.766
Table 4. Accuracy components, single-ended mode - all values are (±)
Range % of Reading Gain Error at FS
(mV)
Offset (mV) Accuracy at FS (mV)
±10 V 0.2 20 19.531 39.531
Analog output
Parameter Conditions Specification
D/A converter type PWM
Resolution 10-bits, 1 in 1024
Maximum output range 0 -5 Volts
Number of channels 2 voltage output
Throughput Software paced 100 S/s single channel mode
50 S/s dual channel mode
Power on and reset voltage Initializes to 000h code
No load Vs
1 mA load 0.99 * Vs
Maximum voltage (Note 3)
5 mA load 0.98 * Vs
Output drive Each D/A OUT 30 mA
Slew rate 0.14 V/mS typ
Note 3: Vs is the USB bus +5V power. The maximum analog output voltage is equal to Vs at no-load.
V is system dependent and may be less than 5 volts.
4-2
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