Overview
The AD421BRZRL, produced by Analog Devices Inc., is a highly integrated, loop-powered digital to analog converter (DAC) designed specifically for smart industrial control transmitters. This device converts digital data into a 4 mA to 20 mA current output, making it ideal for applications requiring precise current control. The AD421BRZRL features a 16-bit resolution and monotonicity, ensuring high accuracy and reliability in industrial control systems.
Key Specifications
| Parameter | Value | Units | Conditions/Comments |
|---|---|---|---|
| Resolution | 16-bit | ||
| Integral Nonlinearity | ±0.01% | ||
| Current Output Range | 4 mA to 20 mA | ||
| Full-Scale Settling Time | 8 ms (typ) | Settling time to ±0.1%, C1 = C2 = 10 nF, C3 = 3.3 nF | |
| Output Impedance | 25 MΩ (typ) | ||
| Voltage Regulator Output | +3 V, +3.3 V, or +5 V | Pin selectable | |
| Precision Reference Voltages | +1.25 V, +2.5 V | ||
| Quiescent Current | 750 μA (max) | ||
| Package | 16-lead SOIC and PDIP | 0.3 inch-wide | |
| Operating Temperature Range | -40°C to +85°C |
Key Features
- HART Compatibility: Fully compatible with standard HART circuitry and other similar FSK protocols.
- Programmable Alarm Current Capability: Allows the transmitter to send out-of-range currents to indicate a transducer fault.
- High Speed Serial Interface: Enables fast data transfer and communication.
- Selectable Voltage Regulator: Provides +3 V, +3.3 V, or +5 V regulated output voltage, and +1.25 V and +2.5 V precision reference voltages.
- Low Quiescent Current: Maximum of 750 μA, making it energy-efficient.
- Compact Packaging: Available in 16-lead SOIC and PDIP packages, ideal for space-constrained applications.
Applications
The AD421BRZRL is designed for use in smart industrial control transmitters, particularly in applications requiring precise 4 mA to 20 mA current output. It is suitable for various industrial control systems, including those involving process control, automation, and instrumentation. The device's HART compatibility and programmable alarm features make it an excellent choice for systems that require reliable and accurate communication and fault detection.
Q & A
- What is the resolution of the AD421BRZRL?
The AD421BRZRL has a 16-bit resolution.
- What is the current output range of the AD421BRZRL?
The current output range is 4 mA to 20 mA.
- What is the full-scale settling time of the AD421BRZRL?
The full-scale settling time is typically 8 ms.
- Is the AD421BRZRL HART compatible?
Yes, the AD421BRZRL is fully compatible with standard HART circuitry and other similar FSK protocols.
- What are the available voltage regulator output options for the AD421BRZRL?
The voltage regulator output can be set to +3 V, +3.3 V, or +5 V.
- What are the precision reference voltages provided by the AD421BRZRL?
The device provides +1.25 V and +2.5 V precision reference voltages.
- What is the maximum quiescent current of the AD421BRZRL?
The maximum quiescent current is 750 μA.
- In what packages is the AD421BRZRL available?
The AD421BRZRL is available in 16-lead SOIC and PDIP packages.
- What is the operating temperature range of the AD421BRZRL?
The operating temperature range is -40°C to +85°C.
- Does the AD421BRZRL have programmable alarm current capability?
Yes, the AD421BRZRL features a programmable alarm current capability to indicate transducer faults.
