Overview
The AD420ARZ-32, produced by Analog Devices Inc., is a comprehensive digital to current loop output converter designed to meet the demands of the industrial control market. This single-chip solution provides high precision and full integration, making it an ideal choice for generating current loop signals. The AD420 is available in compact 24-pin SOIC and PDIP packages and operates over an industrial temperature range of -40°C to +85°C.
Key Specifications
| Parameter | Specification |
|---|---|
| Current Output Range | 4 mA to 20 mA, 0 mA to 20 mA, or 0 mA to 24 mA |
| Resolution and Monotonicity | 16-bit |
| Integral Nonlinearity | ±0.012% max |
| Offset | ±0.05% max (trimmable) |
| Total Output Error | ±0.15% max (trimmable) |
| Power Supply Range | 12 V to 32 V |
| Output Loop Compliance | 0 V to VCC - 2.75 V |
| Serial Data Input Rate | 3.3 MBPS (3-wire mode), 150 kBPS (asynchronous mode) |
| On-Chip Reference | +5 V, 25 ppm/°C max |
| Package Types | 24-Lead SOIC, 24-Lead PDIP |
Key Features
- Flexible serial digital interface supporting 3-wire mode with SPI or MICROWIRE microcontrollers, and asynchronous mode.
- On-chip loop fault detection and asynchronous CLEAR function.
- On-chip 5 V reference with a temperature stability of 25 ppm/°C max.
- Serial data out pin for daisy-chaining multiple AD420s.
- BOOST pin to accommodate an external transistor for reducing power dissipation.
- Trimable offset and total output error using external potentiometers.
- Full-scale settling to 0.1% within 3 ms.
Applications
The AD420ARZ-32 is primarily used in industrial control systems, process control, and automation. It is suitable for applications requiring precise current loop signals, such as in chemical processing, power generation, and distribution systems. Additionally, it can be used in any environment where reliable and accurate current loop communication is essential.
Q & A
- What are the current output ranges of the AD420ARZ-32?
The AD420ARZ-32 can generate current outputs in the ranges of 4 mA to 20 mA, 0 mA to 20 mA, or 0 mA to 24 mA.
- What is the resolution and monotonicity of the AD420ARZ-32?
The AD420ARZ-32 has a 16-bit resolution and monotonicity.
- What is the power supply range for the AD420ARZ-32?
The power supply range for the AD420ARZ-32 is from 12 V to 32 V.
- Does the AD420ARZ-32 support daisy-chaining?
Yes, the AD420ARZ-32 supports daisy-chaining through its serial data out pin in 3-wire mode.
- What is the purpose of the BOOST pin on the AD420ARZ-32?
The BOOST pin allows connection to an external transistor to reduce power dissipation on the chip.
- Can the offset and total output error of the AD420ARZ-32 be trimmed?
Yes, the offset and total output error can be trimmed using external potentiometers.
- What is the temperature stability of the on-chip reference?
The on-chip 5 V reference has a temperature stability of 25 ppm/°C max.
- What are the package types available for the AD420ARZ-32?
The AD420ARZ-32 is available in 24-Lead SOIC and 24-Lead PDIP packages.
- What is the operating temperature range of the AD420ARZ-32?
The operating temperature range is from -40°C to +85°C.
- Does the AD420ARZ-32 have on-chip loop fault detection?
Yes, the AD420ARZ-32 includes on-chip loop fault detection.
