Measurement-computing USB-1208HS-4AO Manuel d'utilisateur télécharger pdf (Page 18)

USB-1208HS-4AO User's Guide Specifications

Analog output

Table 5. Analog output specifications

Parameter Condition Specification

D/A converter Texas Instruments DAC7553

Number of channels 4 independent

Resolution 12 bits

Output range Calibrated ±10 V

Uncalibrated ±10.2 V

Output transient Host PC is reset, powered on, suspended, or

a reset command is issued to device.

Duration: 3 ms typ

Amplitude: 6 V p-p typ

D/A update rate Software paced 33 to 5000 S/s typ, system dependent

Hardware paced 1 MHz max (per channel)

Sample clock source Internal D/A clock or AOCKI

Monotonicity 12 bits

Output current ±3 mA max per channel

Output short-circuit

protection

Output connect to GND Unlimited duration (10 mA typ)

Output coupling DC

Power up and reset state 0 V

Output noise 0.53 mV rms

Settling time (to 0.05%) 20 V output step, (RL=5 kΩ, CL=200 pf) 5 µS max

Absolute accuracy ±0.1%

Slew rate 6.7 V/µs typ

Offset error drift 10 ppm/°C typ

Gain error drift 65 ppm/°C typ

Digital input/output

Table 6. Digital I/O specifications

Parameter Specification

Digital type CMOS

Number of I/O 16

Configuration Each bit may be configured as input (power on default) or output

Pull-up configuration The port has 47 kΩ resistors configurable as pull-up or pull-down with an internal

jumper. The default setting is pull-down.

Digital I/O transfer rate

(system-paced)

33 to 8000 port reads/writes or single bit reads/writes per second typ, system dependent.

Input high voltage 2.0 V min

5.5 V absolute max

Input low voltage 0.8 V max

–0.5 V absolute min

0 V recommended min

Output high voltage 4.4 V min (IOH = –50 µA)

3.76 V min (IOH = –24 mA)

Output low voltage 0.1 V max (IOL = 50 µA)

0.44 V max (IOL = 24 mA)

Output current ±24 mA max per terminal (refer to Power section for additional information)

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 24 25

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