Firmenblog über ADI AD5422BCPZ Single Channel 16-Bit Precision Integrated DAC For HART Network Connectivity

ADI AD5422BCPZ Single Channel 16-Bit Precision Integrated DAC For HART Network Connectivity

Shenzhen Mingjiada Electronics Co., Ltd., as a renowned distributor of electronic components, supplies the AD5422BCPZ single-channel, 16-bit precision digital-to-analogue converter (DAC), providing a reliable solution for industrial process control applications.

These fully integrated DACs incorporate a programmable current source and programmable voltage output, meeting the high-precision requirements of demanding industrial environments.

AD5422BCPZ Product Overview:

The AD5422BCPZ is a low-cost, high-precision digital-to-analogue converter specifically designed for industrial process control applications.

Employing advanced integrated circuit technology, the AD5422BCPZ fully integrates a programmable current source and programmable voltage output, significantly simplifying system design complexity.

The AD5422BCPZ provides enhanced 16-bit resolution, ensuring signal monotonicity.

The AD5422BCPZ supports a broad current output range, including industrial standard 4mA to 20mA, 0mA to 20mA, and an over-range-capable 0mA to 24mA.

The voltage output is provided via independent pins and configurable to 0V to 5V, 0V to 10V, ±5V, or ±10V output ranges, all offering 10% over-range capability.

Core Features and Technical Advantages of the AD5422BCPZ:

As a 16-bit precision DAC, the AD5422BCPZ incorporates multiple outstanding technical characteristics that enable exceptional performance in industrial applications.

High-Precision Output Performance

The AD5422BCPZ delivers exceptional accuracy in both current and voltage output modes:

Current output range is programmable to: 4 mA to 20 mA, 0 mA to 20 mA, or 0 mA to 24 mA (with 10% over-range capability)

Voltage output ranges configurable as: 0 V to 5 V, 0 V to 10 V, ±5 V, or ±10 V (all ranges offer 10% over-range)

Total Unadjusted Error (TUE) typically ±0.01%, ensuring output precision

Outstanding output drift characteristics: ±3 ppm/°C in current mode, ±2 ppm/°C in voltage mode

Integrated HART connectivity capability

The LFCSP version of the AD5422BCPZ features a dedicated CAP2 pin, enabling direct coupling of HART signals to the device's current output. This feature renders the device highly suitable for industrial communication networks based on the HART protocol, eliminating the need for additional complex interface circuitry.

Robust Protection Features

The AD5422BCPZ's analogue output incorporates short-circuit and open-circuit protection, capable of driving capacitive loads up to 1 μF. This robustness provides essential safeguards against unexpected conditions in industrial environments, enhancing system reliability.

AD5422BCPZ Technical Specifications:

Power Supply and Operating Conditions

The AD5422BCPZ features a wide supply voltage range:

Analogue supply (AVDD): 10.8 V to 40 V

Analogue ground (AVSS): -26.4 V to -3 V/0 V

Digital supply: 2.7 V to 5.5 V

Output loop compliance voltage: 0 V to AVDD - 2.5 V

Operating temperature range: -40°C to +105°C

Interface and Control

The AD5422BCPZ incorporates a flexible serial interface compatible with both SPI and MICROWIRE protocols, enabling operation in a three-wire mode. This proves particularly valuable in isolation applications, as it significantly reduces digital isolation requirements and associated costs.

The AD5422BCPZ also incorporates several practical features:

Power-on reset function: Ensures the device powers up in a known state

Asynchronous clear pin (CLEAR): Sets the output to zero-level/mid-level voltage output or the lower end of the selected current range

Fast settling time: Typically 25μs for voltage outputs and 40μs for current outputs

Architecture and Linearity

The AD5422BCPZ employs an R-2R ladder network architecture, achieving differential non-linearity (DNL) of ±1.3 LSB maximum, thereby guaranteeing excellent linearity performance.

AD5422BCPZ Functional Block Diagram：

AD5422BCPZ Applications:

The AD5422BCPZ plays a vital role in numerous industrial scenarios due to its high precision and reliability.

Within process control systems, the AD5422BCPZ delivers precise control signals to regulate actuators.

Programmable logic controllers (PLCs) utilise these DACs to generate analogue output signals, driving diverse field devices.

Actuator control applications rely on its high-precision output for accurate positioning and modulation.

Its capability to support HART network connectivity makes it an ideal choice for intelligent industrial sensors.

Furthermore, the AD5422BCPZ finds extensive application in diverse industrial automation equipment requiring high-precision digital-to-analogue conversion.