Measurement-computing USB-1208LS User Manual download pdf (Page 20)

USB-1208LS User's Guide Specifications

Table 2. 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 3. Accuracy, single-ended mode

Range

Accuracy (LSB)

±10 V

4.0

Table 4. 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

9.766

49.766

±10 V

0.2

9.766

29.766

±5 V

0.2

9.766

19.766

±4 V

0.2

9.766

17.766

±2.5 V

0.2

9.766

14.766

±2 V

0.2

9.766

13.766

±1.25 V

0.2

2.5

9.766

12.266

±1 V

0.2

9.766

11.766

Table 5. 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

19.531

39.531

Analog output

Table 6. Analog output specifications

Parameter

Conditions

Specification

D/A converter type

PWM

Resolution

10-bits, 1 in 1024

Maximum output range

0 V to 5 V

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

Maximum voltage (Note 3)

No load

1 mA load

0.99 * Vs

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.

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