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USB-2416 User's Guide Specifications

Analog input calibration

Table 20. Analog input calibration specifications

Parameter Specifications

Recommended warm-up time 45 minutes minimum

Calibration Firmware calibration

Calibration interval 1 year

Calibration reference +10.000 V, ±5 mV maximum. Actual measured values stored in EEPROM

Tempco: 5 ppm/°C maximum

Long term stability: 30 ppm/1000 hours

Digital input/output

Table 21. Digital input specifications

Number of I/O 8 channels

Configuration Each DIO bit can be independently read from (DIN) or written to (DOUT).

The DIN bits can be read at any time whether the DOUT is active or tri-stated.

Input voltage range 0 to +15 V

Input type CMOS (Schmitt trigger)

Input characteristics 47 kΩ pull-up/pull-down resistor, 28 kΩ series resistor

Maximum input voltage range 0 to +20 V maximum (power on/off, relative to DGND pins 93 and 94)

Pull-up/pull-down

configuration

All pins pulled up to +5 V via individual 47 kΩ resistors (the JP1 shorting block

default position is pins 1 and 2).

Pull down capability is available by placing the JP1 shorting block across pins 2 and 3.

Transfer rate (software paced) 500 port reads or single bit reads per second typical.

Input high voltage 1.3 V minimum, 2.2 V maximum

Input low voltage 1.5 V maximum, 0.6 V minimum

Schmitt trigger hysteresis 0.4 V minimum, 1.2 V maximum

Note 2: DGND pins (pins 93, 94) are recommended for use with digital input and digital output pins. The DGND and GND

pins are common and are isolated from earth ground.

Table 22. Digital output specifications

Number of I/O 8 channels

Configuration Each DIO bit can be independently read from (DIN) or written to (DOUT).

The DIN bits may be read at any time whether the DOUT is active or tri-stated

Output characteristics 47k Ω pull-up, open drain (DMOS transistor)

Pull-up configuration All pins pulled up to +5 V via individual 47 kΩ resistors (the JP1 shorting block

default position is pins 1 and 2).

Transfer rate (software paced) Digital output – 500 port writes or single-bit writes per second typical.

Output voltage range 0 to +5 V (no external pull up resistor, internal 47 kΩ pull-up resistors connected to

+5V by default)

0 to +15 V maximum (Note 5)

Drain to source breakdown

voltage

+50 V minimum

Off state leakage current

(Note 6)

0.1 µA

Sink current capability 150 mA maximum (continuous) per output pin,

150 mA maximum (continuous) for all eight channels

DMOS transistor on-resistance

(drain to source)

4 Ω

Note 3: Each DMOS transistor’s source pin is internally connected to GND.

Note 4: DGND pins (pins 93, 94) are recommended for use with digital input and digital output pins. The DGND and GND

pins are common and are isolated from earth ground.

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