Overview
The AD7401AYRWZ, produced by Analog Devices Inc., is a second-order, sigma-delta (Σ-Δ) modulator designed to convert an analog input signal into a high-speed, 1-bit data stream. This device features on-chip digital isolation using Analog Devices' iCoupler® technology, ensuring high performance and reliability. It operates from a 5 V power supply and accepts a pseudo-differential input signal of ±250 mV (±320 mV full scale). The AD7401A is packaged in a 16-lead SOIC and has an operating temperature range of −40°C to +125°C, making it suitable for various industrial and automotive applications.
Key Specifications
| Parameter | Value | Unit | Conditions |
|---|---|---|---|
| Supply Voltage (VDD1) | 4.5 V to 5.5 V | V | Relative to GND1 |
| Analog Input Range | ±250 mV (±320 mV full scale) | mV | Pseudo-differential input |
| Data Rate | Up to 20 MHz | MHz | |
| Operating Temperature Range | −40°C to +125°C | °C | |
| Input-to-Output Momentary Withstand Voltage | 5000 V rms for 1 minute | V | UL 1577 |
| Minimum External Air Gap (Clearance) | 7.8 mm | mm | Measured from input terminals to output terminals |
| Minimum External Tracking (Creepage) | 7.8 mm | mm | Measured from input terminals to output terminals |
| Minimum Internal Gap (Internal Clearance) | 0.017 mm | mm | Insulation distance through insulation |
Key Features
- On-chip digital isolation using iCoupler® technology for high performance and reliability.
- Second-order sigma-delta modulator converting analog input to a high-speed 1-bit data stream.
- Pseudo-differential analog input with a range of ±250 mV (±320 mV full scale).
- No external sample-and-hold circuitry required due to continuous sampling by the analog modulator.
- Serial I/O interface with 5 V or 3.3 V supply (VDD2) and digital isolation.
- On-chip reference and watchdog functionality.
- 16-lead SOIC package with an operating temperature range of −40°C to +125°C.
Applications
- AC motor controls
- Shunt current monitoring
- Data acquisition systems
- Analog-to-digital and opto-isolator replacements
- Automotive applications
Q & A
- What is the primary function of the AD7401AYRWZ?
The AD7401AYRWZ is a second-order sigma-delta modulator that converts an analog input signal into a high-speed 1-bit data stream.
- What is the operating temperature range of the AD7401AYRWZ?
The operating temperature range is −40°C to +125°C.
- What type of isolation does the AD7401AYRWZ use?
The device uses on-chip digital isolation based on Analog Devices' iCoupler® technology.
- What is the range of the pseudo-differential analog input?
The pseudo-differential analog input range is ±250 mV (±320 mV full scale).
- Does the AD7401AYRWZ require external sample-and-hold circuitry?
No, the device does not require external sample-and-hold circuitry due to continuous sampling by the analog modulator.
- What are the safety and regulatory approvals for the AD7401AYRWZ?
The device has UL recognition for 5000 V rms for 1 minute per UL 1577, CSA Component Acceptance Notice #5A, and VDE Certificate of Conformity DIN V VDE V 0884-10 (VDE V 0884-10):2006-12.
- What is the data rate of the AD7401AYRWZ?
The data rate is up to 20 MHz.
- What package type is the AD7401AYRWZ available in?
The device is available in a 16-lead SOIC package.
- What are some common applications of the AD7401AYRWZ?
Common applications include AC motor controls, shunt current monitoring, data acquisition systems, and automotive applications.
- Does the AD7401AYRWZ have an on-chip reference?
