AD420 DATASHEET PDF

The AD is a complete digital to current loop output converter, designed to meet the needs of the industrial control market. It provides a high precision, fully integrated, low cost single-chip solution for generating current loop signals in a compact pin SOIC or PDIP package. The 3. It can be used in three-wire or asynchronous mode and a serial-out pin is provided to allow daisy chaining of multiple DACs on the current loop side of the isolation barrier.

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It provides a high precision, fully integrated, low cost single-chip solution for generating current loop signals in a compact lead SOIC or PDIP package.

The output current range can be programmed to 4 mA to 20 mA, 0 mA to 20 mA or to an overrange function of 0 mA to 24 mA. The 3. It can be used in 3-wire or asynchronous mode and a serial-out pin is provided to allow daisy chaining of multiple DACs on the current loop side of the isolation barrier. Full-scale settling to 0. The only external components that are required in addition to normal transient protection circuitry are two low cost capacitors which are used in the DAC out- put filter.

If the AD is used at extreme temperatures and supply voltages, an external output transistor can be used to minimize power dissipation on the chip via the BOOST pin. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use.

Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. The AD is a single chip solution for generating 4 mA to 20 mA or 0 mA to 20 mA signals at the controller end of the current loop. The AD is specified with a power supply range from 12 V to 32 V. The serial data out pin can be used to daisy chain any number of ADs together in 3-wire mode. At power-up, the AD initializes its output to the low end of the selected range.

One Technology Way, P. Box , Norwood, MA , U. Tel: All rights reserved. Technical Support www. Data Sheet.

Flexible serial digital interface 3. On-Chip loop fault detection. Maximum power supply range of 32 V. The AD is a complete digital to current loop output. It provides a high precision, fully integrated, low cost. The output current range can be programmed to 4 mA to. The AD can alternatively provide a voltage output. It can be used in 3-wire or asynchronous. The only external components that are. If the AD is used at extreme temperatures and supply. The on-chip voltage reference can be used to supply a precision.

Document Feedback. Information furnished by Analog Devices is believed to be accurate and reliable. However, no. Serial Input Bit. REF IN. I OUT. V OUT. Figure 1. The AD is a single chip solution for generating 4 mA to. The AD is specified with a power supply range from. The flexible serial input can be used in 3-wire mode. The serial data out pin can be used to daisy chain any. At power-up, the AD initializes its output to the low.

Technical Support. No Preview Available! Functional Block Diagram General Description Product Highlights Revision History Absolute Maximum Ratings ESD Caution Pin Configuration and Function Descriptions Timing Requirements Three-Wire Interface Asynchronous Interface Theory of Operation Applications Information Current Output H to Rev.

G to Rev. Changes to Figure Changes to Ordering Guide F to Rev. Updated Format Changes to Table Updated Outline Dimensions E to Rev. Driving Inductive Loads Voltage-Mode Output Optional Span and Zero Trim Asynchronous Interface Using Optocouplers Microprocessor Interface AD to Microwire Interface External Boost Function AD Protection Transient Voltage Protection Board Layout And Grounding Power Supplies and Decoupling Outline Dimensions Ordering Guide I Page 2 of Part Number.

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