IC-GD Datasheet, PDF (2/55 Pages) IC-Haus GmbH – UNIVERSAL I/O INTERFACE

iC-GD
UNIVERSAL I/O INTERFACE
preliminary
Rev A1, Page 2/55
DESCRIPTION
iC-GD is an interface IC with two independent chan-
nels each of which is configurable for a variety of
measurement and control signal transmission tasks.
Both channels, each with 4 pins, can be addressed
via the SPI interface and configured by an external
EEPROM or SPI.
When configured as low-side or high-side drivers,
each channel is capable of high driving currents (at
least 500 mA) with integrated current measurement
and current limitation. Drivers are short-circuit proof
by shut-down in case of overtemperature or overload.
The high/low-side drivers can be connected in parallel
for higher currents and feature an active freewheeling
circuit and reverse polarity protection.
Operated as an analog output, the iC-GD provides
voltages in the range of ±10 V or currents in the range
of 0 or 4 to 20 mA with a resolution of 14 bits.
When configured as an analog input, a 14-bit ADC
processes differential voltages in the range of ±10 V,
±1 V, ±100 mV, ±10 mV or currents in the range of
±20 mA or 4 to 20 mA.
The analog inputs can be bandwidth-limited over a
wide range from 2 kHz to 0.5 Hz by means of a con-
figurable input filter. Additionally a fast mode with an
8 kHz limit is available.
Pt temperature sensors (in 2-, 3- and 4-wire tech-
nology) and various thermocouples can also be con-
nected to provide the absolute temperature with a
resolution of 0.1 K after calibration.
After calibration an integrated temperature sensor
also supplies the absolute chip temperature with a
resolution of 1 K.
In digital input mode, two 32-bit counters are available
which can be configured for counting direction, start
value, end value or used in combination as a single
gated counter. An LED signals the state of the digital
input even without the iC-GD being powered.
The digital output can be operated as a pulse-width
modulator with a resolution of either 125 ns or 16 µs
and a cycle time of up to 8.192 ms or 1.048 s.
If all pins of a channel are not used, it is possible
to use certain functions of a channel simultaneously.
Thus, for example, the high-side or low-side driver or
the digital input respectively can be operated indepen-
dent of voltage and current measurement or voltage
output.
A variety of monitoring functions are available, includ-
ing supply voltage, cable breaks and overload condi-
tions to provide comprehensive system diagnostics.
The iC-GD is calibrated via SPI and via the relevant
pins.
Each IC holds a unique serial number for identifica-
tion.