Overview
The AD420AN-32, produced by Analog Devices Inc., 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, and low-cost single-chip solution for generating current loop signals. The AD420AN-32 is available in a 24-lead SOIC and PDIP package and operates over the industrial temperature range of −40°C to +85°C.
Key Specifications
| Parameter | Value |
|---|---|
| Output Current Range | 4 mA to 20 mA, 0 mA to 20 mA, or 0 mA to 24 mA |
| Resolution | 16-bit |
| Integral Nonlinearity | ±0.012% max |
| Offset Error | ±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-Wire Mode) | No minimum, up to 3.3 MBPS |
| Serial Data Input Rate (Asynchronous Mode) | No minimum, up to 150 kBPS |
| Settling Time | 3 ms |
| Package Type | 24-lead SOIC and PDIP |
| Operating Temperature Range | −40°C to +85°C |
Key Features
- High precision digital to current loop output converter
- Flexible serial digital interface (SPI, Serial)
- On-chip loop fault detection and 5 V reference (25 ppm/°C max)
- Asynchronous CLEAR function
- Programmable output current ranges: 4 mA to 20 mA, 0 mA to 20 mA, or 0 mA to 24 mA
- Optional voltage output: 0 V to 5 V, 0 V to 10 V, ±5 V, or ±10 V with an external buffer amplifier
- Internal filtering capacitors for stable operation
Applications
The AD420AN-32 is primarily used in industrial control systems, including but not limited to:
- Process control systems requiring precise current loop signals
- Industrial automation and control systems
- Measurement and instrumentation systems
- Control systems in chemical, oil, and gas industries
Q & A
- What is the primary function of the AD420AN-32?
The AD420AN-32 is a digital to current loop output converter, designed to generate precise current loop signals for industrial control applications. - What are the available output current ranges for the AD420AN-32?
The AD420AN-32 can be programmed to output current ranges of 4 mA to 20 mA, 0 mA to 20 mA, or 0 mA to 24 mA. - What is the resolution of the AD420AN-32?
The AD420AN-32 has a 16-bit resolution. - What is the maximum integral nonlinearity of the AD420AN-32?
The maximum integral nonlinearity is ±0.012%. - What is the power supply range for the AD420AN-32?
The power supply range is from 12 V to 32 V. - Does the AD420AN-32 have on-chip loop fault detection?
Yes, the AD420AN-32 includes on-chip loop fault detection. - What is the settling time of the AD420AN-32?
The settling time is 3 ms. - In what package types is the AD420AN-32 available?
The AD420AN-32 is available in 24-lead SOIC and PDIP packages. - What is the operating temperature range of the AD420AN-32?
The operating temperature range is −40°C to +85°C. - Can the AD420AN-32 provide voltage output in addition to current output?
Yes, the AD420AN-32 can provide voltage output with the addition of a single external buffer amplifier.
