Overview
The AD421BRZRL7, produced by Analog Devices Inc., is a complete, loop-powered, digital to 4 mA to 20 mA converter. It is specifically designed to meet the needs of smart transmitter manufacturers in the industrial control industry. This device is fully compatible with standard HART FSK protocol communication circuitry and features a high-speed serial interface capable of operating at 10 Mbps, facilitating simple connections to microprocessors and microcontrollers via a standard three-wire serial interface.
Key Specifications
| Parameter | Value | Units | Conditions/Comments |
|---|---|---|---|
| Resolution | 16 bits | Monotonicity ensured | |
| Integral Nonlinearity | 0.01% | ||
| Quiescent Current | 750 µA max | ||
| Voltage Regulator Output | +3 V, +3.3 V, +5 V | V | Pin selectable |
| Precision Reference | +1.25 V, +2.5 V | V | |
| Operating Temperature | -40°C to +85°C | °C | |
| Package Style | 16-lead wide SOIC | ||
| Full-Scale Settling Time | 8 ms typ | ms | To ±0.1%, C1 = C2 = 10 nF, C3 = 3.3 nF |
| Output Impedance | 25 MΩ typ | Ω |
Key Features
- 16-bit resolution and monotonicity, ensuring high accuracy in digital to analog conversion.
- Integral nonlinearity of 0.01%, providing precise output currents.
- Low quiescent current of 750 µA max, contributing to energy efficiency.
- Programmable alarm current capability, allowing the transmitter to indicate out-of-range conditions or transducer faults.
- Flexible high-speed serial interface operating at 10 Mbps, facilitating easy integration with microprocessors and microcontrollers.
- Selectable voltage regulator output of +3 V, +3.3 V, or +5 V, and precision reference voltages of +1.25 V and +2.5 V).
- Loop-powered design, capable of operating from VCC + 2 V min to the breakdown voltage of the pass transistor).
- Compatibility with standard HART FSK protocol communication circuitry without performance degradation).
Applications
The AD421BRZRL7 is suitable for a variety of applications, particularly in the industrial control industry. It is used in smart transmitter systems, where it converts digital data into 4 mA to 20 mA current signals. Other potential applications include medical systems, audio and video systems, automotive systems, and telecommunications systems, due to its high performance, low power consumption, and wide operating temperature range).
Q & A
- What is the primary function of the AD421BRZRL7?
The AD421BRZRL7 is a digital to 4 mA to 20 mA converter, designed to convert digital data into current signals for industrial control transmitters).
- What is the resolution of the AD421BRZRL7?
The AD421BRZRL7 has a 16-bit resolution with ensured monotonicity).
- What is the integral nonlinearity of the AD421BRZRL7?
The integral nonlinearity is 0.01%).
- What are the available voltage regulator outputs for the AD421BRZRL7?
The voltage regulator outputs can be set to +3 V, +3.3 V, or +5 V, and there are also precision reference voltages of +1.25 V and +2.5 V available).
- Is the AD421BRZRL7 compatible with HART protocol?
Yes, the AD421BRZRL7 is fully compatible with standard HART FSK protocol communication circuitry).
- What is the operating temperature range of the AD421BRZRL7?
The operating temperature range is -40°C to +85°C).
- What is the quiescent current of the AD421BRZRL7?
The quiescent current is 750 µA max).
- Does the AD421BRZRL7 have programmable alarm current capability?
Yes, the AD421BRZRL7 has programmable alarm current capability to indicate out-of-range conditions or transducer faults).
- What is the package style of the AD421BRZRL7?
The package style is a 16-lead wide SOIC).
- What is the full-scale settling time of the AD421BRZRL7?
The full-scale settling time is typically 8 ms to ±0.1%).
