AD694ARZ-REEL
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Analog Devices Inc. AD694ARZ-REEL

Manufacturer No:
AD694ARZ-REEL
Manufacturer:
Analog Devices Inc.
Package:
Tape & Reel (TR)
Description:
IC TRANSMITTER 4-20MA 16-SOIC
Delivery:
Payment:
iso14001
iso45001
iso9001
iso13485

Product Introduction

Overview

The AD694ARZ-REEL, produced by Analog Devices Inc., is a monolithic current transmitter designed to drive a standard 4–20 mA current loop. This device is ideal for systems that require noise-immune signal transmission to control valves, actuators, and other devices commonly used in process control. The AD694 accepts high-level signal inputs and features an input buffer amplifier that can scale the input signal or buffer the output from a current mode DAC. It offers precalibrated input ranges of 0 V to 2 V and 0 V to 10 V, which can be selected by simple pin strapping, and other spans can be programmed using external resistors.

Key Specifications

ParameterMinTypMaxUnit
Input Voltage Range-0.2 VS-2.0 VVS - 2.5 VV
Input Bias Current1.5511.5nA
Offset Current± 0.1±11± 0.1nA
Offset Current Drift± 1.0± 5.0± 1.0pA/°C
Input Impedance55
Operating Current Range023mA
Output Voltage ComplianceVS – 36 VVS – 2 VV
Output Impedance (4–20 mA)40.050.0
Current Limit (@ 2 × FS Overdrive)241441mA
Slew Rate1.31.3mA/µs
Span and Zero Accuracy - 4 mA Offset Error @ 0 V Input± 10±201µA
Trim Range, 4 mA Zero2.04.8mA
Transfer Function Error from Nom, Input FS = 2 V, 10 V± 0.1±0.31% of Span

Key Features

  • Precalibrated input ranges: 0 V to 2 V and 0 V to 10 V, with the option to program other spans using external resistors.
  • Precision voltage reference programmable to 2.000 V or 10.000 V.
  • Single or dual supply operation with a wide power supply range of 4.5 V to 36 V.
  • Wide output compliance extending to within 2 V of VS.
  • Input buffer amplifier for scaling the input signal or buffering the output from a current mode DAC.
  • Open-loop alarm for detecting an open 4–20 mA loop or noncompliance of the output stage.
  • Optional external pass transistor to reduce self-heating errors.
  • High accuracy achieved through active laser trimming of thin film resistors.

Applications

The AD694ARZ-REEL is primarily used in process control systems to drive valves, actuators, and other devices. It is suitable for applications requiring noise-immune 4–20 mA signal transmission. Common use cases include industrial automation, control systems, and any environment where precise and reliable current loop control is necessary.

Q & A

  1. What is the primary function of the AD694ARZ-REEL?
    The primary function of the AD694ARZ-REEL is to drive a standard 4–20 mA current loop for controlling valves, actuators, and other devices in process control systems.
  2. What are the precalibrated input ranges of the AD694ARZ-REEL?
    The precalibrated input ranges are 0 V to 2 V and 0 V to 10 V.
  3. Can the AD694ARZ-REEL operate with a single or dual power supply?
    Yes, the AD694ARZ-REEL can operate with either a single or dual power supply.
  4. What is the power supply range for the AD694ARZ-REEL?
    The power supply range is from 4.5 V to 36 V.
  5. Does the AD694ARZ-REEL have an alarm feature?
    Yes, it has an open-loop alarm to detect an open 4–20 mA loop or noncompliance of the output stage.
  6. How does the AD694ARZ-REEL achieve high accuracy?
    High accuracy is achieved through active laser trimming of the thin film resistors.
  7. Can the AD694ARZ-REEL be used with an external pass transistor?
    Yes, an optional external pass transistor can be used to reduce self-heating errors.
  8. What is the typical nonlinearity of the AD694ARZ-REEL?
    The typical nonlinearity is 0.002%.
  9. What is the slew rate of the AD694ARZ-REEL?
    The slew rate is 1.3 mA/µs.
  10. What are common applications for the AD694ARZ-REEL?
    Common applications include industrial automation, control systems, and any environment requiring precise and reliable current loop control.

Product Attributes

Type:Current Transmitter
Input Type:Voltage
Output Type:Voltage
Current - Supply:23 mA
Operating Temperature:-40°C ~ 85°C
Mounting Type:Surface Mount
Package / Case:16-SOIC (0.295", 7.50mm Width)
Supplier Device Package:16-SOIC
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Similar Products

Part Number AD694ARZ-REEL AD694BRZ-REEL
Manufacturer Analog Devices Inc. Analog Devices Inc.
Product Status Active Active
Type Current Transmitter Current Transmitter
Input Type Voltage Voltage
Output Type Voltage Voltage
Current - Supply 23 mA 23 mA
Operating Temperature -40°C ~ 85°C -40°C ~ 85°C
Mounting Type Surface Mount Surface Mount
Package / Case 16-SOIC (0.295", 7.50mm Width) 16-SOIC (0.295", 7.50mm Width)
Supplier Device Package 16-SOIC 16-SOIC

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