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USB-202 User's Guide Specifications

Noise performance

For the peak to peak noise distribution test, the input channel is connected to AGND at the input terminal block,

and 12,000 samples are acquired at the maximum throughput.

Table 3. Noise performance specifications

Range

Counts

LSBrms

±10 V

0.76

Analog input calibration

Table 4. Analog input calibration specifications

Parameter

Specification

Recommended warm-up time

15 minutes min

Calibration method

Factory

Calibration interval

1 year

Analog output

Table 5. Analog output specifications

Parameter

Condition

Specification

Resolution

12 bits, 1 in 4,096

Output range

0 V to 5.0 V

Number of channels

Throughput (Note 1)

Software paced

250 S/s single channel typ, PC dependent

Power on and reset voltage

Initializes to 000h code

0 V, ±10 mV

Output drive

Each D/A OUT

5 mA, sourcing

Slew rate

0.8 V/ µs typ

Note 1: Maximum throughput when scanning is machine dependent.

Table 6. Analog output accuracy, all values are (±); accuracy tested at no load

Range

Accuracy (LSB)

0 V to 5.0 V

5.0 typ, 45.0 max

Table 7. Analog output accuracy components, all values are (±)

Range

% of FSR

Gain Error at FS (mV)

Offset (mV)

(Note 2)

Accuracy at FS (mV)

0 V to 5.0 V

0.08 typ, 0.72 max

4.0 typ, 36.0 max

1.0 typ, 9.0 max

5.0 typ, 45.0 max

Note 2: Zero-scale offsets may result in a fixed zero-scale error producing a "dead-band” digital input code

region. In this case, changes in digital input code at values less than 0x040 may not produce a

corresponding change in the output voltage. The offset error is tested and specified at code 0x040.

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