Overview
The AD420AR-32, manufactured by Analog Devices Inc., is a highly integrated digital-to-analog converter (DAC) designed to meet the demands of industrial control applications. This 16-bit DAC is specifically tailored for generating 4 mA to 20 mA or 0 mA to 20 mA current loop signals, which are standard in industrial control systems. It offers a compact and low-cost solution in a 24-lead SOIC or PDIP package, making it ideal for a variety of industrial automation and process control environments.
Key Specifications
| Parameter | Min | Typ | Max | Units | Comments |
|---|---|---|---|---|---|
| Operating Temperature Range | -40 | 85 | °C | ||
| Power Supply Range | 12 | 32 | V | ||
| Quiescent Current | 4.2 | 5.5 | mA | ||
| Output Current Range | 0 mA to 20 mA, 4 mA to 20 mA, 0 mA to 24 mA | Programmable | |||
| Integral Nonlinearity (INL) | ±0.012% | Max | |||
| Offset Error | ±0.05% | Max, trimmable | |||
| Total Output Error | ±0.15% | Max, trimmable | |||
| Data Interface | SPI, 3-wire mode, asynchronous mode | ||||
| Reference Type | External, Internal (+5 V, 25 ppm/°C max) | ||||
| Output Loop Compliance | 0 V | VCC - 2.75 V | |||
| Package | 24-lead SOIC, PDIP |
Key Features
- High Precision: 16-bit resolution with ±0.012% max integral nonlinearity and ±0.15% max total output error (trimmable).
- Flexible Output: Programmable output current range of 0 mA to 20 mA, 4 mA to 20 mA, or 0 mA to 24 mA.
- Serial Digital Interface: Supports 3-wire mode and asynchronous mode with data rates up to 3.3 Mbps and 150 kbps respectively.
- On-Chip Loop Fault Detection: Detects open circuits in the loop.
- Internal Reference: +5 V reference with 25 ppm/°C max temperature stability.
- Low Power Consumption: Quiescent current of 4.2 mA to 5.5 mA.
- Compact Packaging: Available in 24-lead SOIC and PDIP packages.
Applications
- Industrial Control Systems: Ideal for generating current loop signals in process control, automation, and measurement applications.
- Process Automation: Used in systems requiring precise control over analog outputs.
- Measurement and Instrumentation: Suitable for applications needing high accuracy and reliability in current output.
- Automotive and Aerospace: Can be used in various control and monitoring systems due to its robust specifications and wide operating temperature range.
Q & A
- What is the primary function of the AD420AR-32?
The AD420AR-32 is a digital-to-analog converter (DAC) designed to generate 4 mA to 20 mA or 0 mA to 20 mA current loop signals.
- What are the key specifications of the AD420AR-32's output current range?
The output current range can be programmed to 0 mA to 20 mA, 4 mA to 20 mA, or 0 mA to 24 mA.
- What is the resolution of the AD420AR-32?
The AD420AR-32 has a 16-bit resolution.
- What are the power supply requirements for the AD420AR-32?
The power supply range is from 12 V to 32 V.
- Does the AD420AR-32 have built-in loop fault detection?
Yes, it has on-chip loop fault detection that signals when an open circuit occurs in the loop.
- What types of packages are available for the AD420AR-32?
The AD420AR-32 is available in 24-lead SOIC and PDIP packages.
- What is the operating temperature range of the AD420AR-32?
The operating temperature range is from -40°C to 85°C.
- Can the AD420AR-32 be used with external references?
Yes, it supports both internal and external references.
- What is the maximum data rate for the serial interface of the AD420AR-32?
The maximum data rate is 3.3 Mbps in 3-wire mode and 150 kbps in asynchronous mode.
- Is the AD420AR-32 RoHS compliant?
No, the AD420AR-32 is not RoHS compliant.
