iC-GD is an interface IC with two independent channels 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 20mA with a resolution of 14 bits.
When configured as an analog input, a 14-bit ADC processes differential voltages in the range of ±10V, ±1V, ±100mV, ±10mV or currents in the range of ±20mA 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 configurable input filter. Additionally a fast mode with an 8 kHz limit is available.
Pt temperature sensors (in 2-, 3- and 4-wire technology) and various thermocouples can also be connected 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 independent of voltage and current measurement or voltage output.
A variety of monitoring functions are available, including supply voltage, cable breaks and overload conditions 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 identification.
Symmetry Electronics is an authorized iC-Haus distributor.
