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Series Information for 1B22AN - Analog Devices


  • feature
    Internal Isolated Loop Supply Drives 1000 u2340 Load Pin Programmable Inputs: 0 V to +5 V or 0 V to +10 V Pin Programmable Outputs: 4 to 20 mA or 0 to 20 mA High CMV Isolation: 1500 V RMS Normal-Mode Output Protection: 240 V RMS High Accuracy Low Offset Tempco: u2d1e300 nA/u2d17C Low Gain Tempco: u2d1e50 ppm/u2d17C Low Nonlinearity: u2d1e0.02% High CMR: 90 dB min Small Package: 1.0" u2d1b 2.10" u2d1b 0.35" Meets IEEE STD 472: CMV Transient Protection (SWC)
1B22AN image
Not RoHS Compliant



The 1B22 is an isolated voltage-to-current converter that 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. With programmable inputs and outputs, the 1B22 provides an unbeatable combination of versatility and performance in a compact plastic package. Functionally, the V/I converter consists of four basic sections: input conditioning, modulator/demodulator, isolated loop supply and current source (Figure 1). The 1B22 is pin program- mable for 0 V to +5 V or 0 V to +10 V inputs and 0 to 20 mA or 4 to 20 mA outputs using an internal resistor network. It can also be set by an external resistor to accept 0 V to +1 V to 0 V to +10 V inputs. Transformer coupling provides 1500 V rms galvanic isolation between the inputs and the current loop. Nonlinearity is an excellent ±0.05% max. Loop power is generated internally through a dc/dc converter and is also isolated from the input side (1500 V rms). Loop compliance voltage is dependent on the voltage supplied to the 1B22, and with VLOOP = 28 V, it is sufficient to drive a 1000 Ω load. The 1B22 is fully specified over –25°C to +85°C and operates over the industrial (–40°C to +85°C) temperature range. DESIGN FEATURES AND USER BENEFITS Isolated Loop Power: Internal loop supply completely isolates the loop from the input terminals (1500 V rms) and provides the capability to drive 0 Ω to 1000 Ω loads. This elimi- nates the need for an external dc/dc converter. Ease of Use: The 1B22 offers complete isolated voltage-to- current conversion with minimum external parts required to get a conditioned current signal. No external buffers or drivers are required. High CMV Isolation: The 1B22 features high input to output galvanic isolation to eliminate ground loops and offer protection against damage from transients and fault voltages. The isolation barrier will withstand continuous CMV of 1500 V rms and meets the IEEE Standard for Common-Mode Voltage Transient Pro- tection (STD 472-SWC). Small Size: The 1B22 package size (1.0" × 2.1" DIP) makes it an excellent choice in multichannel systems for maximum chan- nel density. The 0.35" height also facilitates applications with limited board clearance.


IC Function:
Supply Voltage Min:
Supply Voltage Max:
IC Package Type:
No. of Pins:
Operating Temperature Min:
Operating Temperature Max:
Product Range:
Automotive Qualification Standard:
No SVHC (07-Jul-2017)

Alternate Descriptions

Newark Electronics
VOLTAGE-TO-CURRENT CONVERTER, 12 DIP; IC Function:Voltage to Current Converter; Supply Voltage Min:14.25V; Supply Voltage Max:15.75V; IC Package Type:DIP; No. of Pins:12Pins; Operating Temperature Min:-40°C; Product Range:-; MSL:- RoHS Compliant: No