Product Features

AM422-1 Voltage to Current Converter IC for 3-Wire Operation

AM422 is a low cost monolithic voltage– to–current converter specially designed for analog signal transmission. The AM422 is available in a 3– or 2–wire version, which allows applications with flexible input voltage ranges to be used for a standard output current. Output current range and current offset level are freely adjustable by external resistors. The IC consists of three basic sections: an operational amplifier input stage for single ended input signals (0.5–4.5V, 0–10V, or other), a programmable 4.5 to 10V reference for transducer excitation, and a current output, freely adjustable in a wide current range (4–20mA, 0–20mA, other). With the broad spectrum of possible input signals the AM422 is a flexible and multipurpose voltage–to–current converter for single ended transducers or voltage transmission.

General Documents

• Datasheet AM422-1
• IC package catalog

Part Descriptions

AM422-1 is a compact voltage-to-current converter IC for 3-wire operation with integrated protection functions and voltage source. It converts a single-ended input voltage into a current output signal with adjustable offset and gain. The IC is especially suitable for price sensitive industrial applications with single-ended input signals.

Features of AM422 Voltage/Current Converter

• Wide Supply Voltage Range: 6...35V
• Wide Operating Temperature Range:–40°C...+85°C
• Adjustable Voltage Reference:4.5 to 10V
• Operational Amplifier Input: 0.5...4.5V, 0...5V, other
• Adjustable Offset Current
• Available as Three– (0/4...20mA) or Two–Wire Version (4...20mA)
• Adjustable Output Current Range
• Protection Against Reverse Polarity
• Protected Current Output

Applications of AM422 Voltage/Current Converter

• Sensor signal-conditioner
• Industrial current output driver
• Protected V/I-converter IC
• Analog back end for µC
• Voltage driven current source
• Industrial process control