Measurement-computing USB-3110 Bedienungsanleitung PDF herunterladen (Seite 18)

Chapter 4

Specifications

Typical for 25 °C unless otherwise specified.

Specifications in italic text are guaranteed by design.

Analog voltage output

Table 1. Analog voltage output specifications

Parameter

Conditions

Specifications

Digital to Analog converter

DAC8554

Number of channels

Resolution

16 bits

Output ranges

Calibrated

±10 V, 0 to 10 V

Software configurable

Un-calibrated

±10.2 V, -0.04 to 10.08 V

Software configurable

Output Transient

±10 V to (0 to 10 V) or

(0 to 10 V) to ±10 V range

selection (Note 1)

Duration 5 µS typ.

Amplitude 5 V p-p typ.

Host PC is reset, powered up,

suspended or a reset command is

issued to device. (Note 2)

Duration 2 S typ.

Amplitude 2 V p-p typ.

Initial power on.

Duration 50 mS typ.

Amplitude 5 V peak typ

Differential non-linearity

(Note 3)

Calibrated

±1.25 LSB typ.

-2 LSB to +1 LSB max.

Un-calibrated

±0.25 LSB typ.

±1 LSB max.

Current output (Note 4)

VOUTx pins

±40 mA max.

Output short-circuit protection

(Note 4)

VOUTx connected to AGND

100 mS max.

Output coupling

Power on and reset state

DACs clear to zero-scale: 0 V, ±50 mV typ.

Output Range: 0-10V

Output noise

0 to 10 V range

14.95 µVrms typ.

±10 V range

31.67 µVrms typ.

Settling time

to 1 LSB accuracy

25 µS typ.

Slew rate

0 to10 V range

2.0 V/µS typ.

±10 V range

4.0 V/µS typ.

Throughput

single channel

100 Hz max., system dependent

multi-channel

100 Hz/#ch max., system dependent

Note 1: The USB-3110 output voltage level defaults to 0V whenever the output voltage range is

reconfigured.

The USB-3110 output voltage level will also default to 0V:

1. Whenever the host PC is reset, shut down or suspended

2. If a reset command is issued to the device.

Note 2: The duration of this particular output transient is highly dependent on the enumeration process of

the host PC. Typically the output of the USB-3110 is stable after 2 seconds.

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