1B22AN

1B22 is an isolated voltage-to-current converter. It incorporates transformer isolation to achieve high performance and automated surface mount manufacturing for low cost and increased reliability. Designed for industrial applications, it is especially suited for harsh environments with extremely high common-mode interference. Functionally, the V/I converter consists of four basic sections: input conditioning, modulator/demodulator, isolated loop supply and current source. This device is pin programmable for 0V to +5V or 0V to +10V inputs and 0 to 20mA or 4 to 20mA outputs using an internal resistor network. It can be set by an external resistor to accept 0 V to +1V to 0V to +10V inputs. Transformer coupling provides 1500V rms galvanic isolation between the inputs and the current loop. It is used in application such as multichannel process control, D/A converter—current loop interface, analogue transmitters and controllers, remote data acquisition systems etc.

• Internal isolated loop supply drives 1000 ohm load
• High CMV isolation is 1500V RMS maximum
• Normal-mode output protection is 240V RMS
• Low offset tempco is 300nA/C
• Low gain tempco is 50ppm/C
• Low nonlinearity is 0.02% maximum
• High CMR is 90dB minimum
• Quiescent current is ±7.5mA
• Operating temperature is -40°C to +85°C

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party