AM402

DataSheet.in CURRENT CONVERTER IC FEATURES Wide Supply Voltage Range: 6...35V Wide Operating Temperature Range: –40°C...+85°C Adjustable Reference Voltage Source: 4.5 to 10V Wide Common Mode Range Instrumentation Amplifier Adjustable Gain and Offset Two–Wire Output: 4...20mA Three–Wire Output: 0/4...20mA Adjustable Output Current Range Protection Against Reverse Polarity Current Shutdown with Overvoltage Shutdown with Excessive Temperature AM402 GENERAL DESCRIPTION AM402 is a monolithically integrated current converter which has been specially developed for the processing of differential bridge signals. AM402 is suitable for two- and threewire applications and has four function blocks. A high-precision instrumentation amplifier (IA) serves as an input stage. A reference voltage source, which can be adjusted to values of between 4.5 and 10V, excites external components and a voltage-controlled current output stage converts the voltage signal. It is thus possible to generate output currents which correspond to the normal industrial standards (0/4–20mA, 12 ± 8mA). DELIVERY APPLICATIONS Industrial Process Control Sensor Signal Converter (e.g. pressure) Programmable Current Source DIL16 packages (samples) SO16(n) packages Dice on 5“ blue foil BLOCK DIAGRAM GAIN− GAIN GAIN+ 10 11 12 VSET 13 VREF 16 AM402 Reference Voltage 1 2 3 9 IN+ 8 IN− 14 GND 7 SET Instrumentation Amplifier V I RS+ VCC RS− OUT 5 Figure 1 analog microelectronics Anal...