Overview
The AD7400AYRWZ, 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 based on Analog Devices' iCoupler® technology, ensuring robust and reliable performance in various applications. The AD7400A operates from a 5 V power supply and accepts a differential input signal of ±250 mV (±320 mV full-scale), eliminating the need for external sample-and-hold circuitry. It is available in a 16-lead SOIC package and supports an operating temperature range of −40°C to +125°C.
Key Specifications
| Parameter | Value | Unit | Conditions |
|---|---|---|---|
| Analog Input Range | ±250 mV (±320 mV full-scale) | mV | |
| Offset Drift | 1.5 μV/°C typical | μV/°C | |
| Gain Error | ±1.5 mV (−40°C to +85°C), ±2 mV (−40°C to +125°C) | mV | |
| Gain Error Drift vs. Temperature | 23 μV/°C | μV/°C | −40°C to +125°C |
| Power Supply (VDD1) | 4.5 V to 5.5 V | V | |
| Power Supply (VDD2) | 3 V to 5.5 V | V | |
| Current Consumption (IDD1) | 11 mA to 13 mA at VDD1 = 5.5 V | mA | VDD1 = 5.5 V |
| Current Consumption (IDD2) | 4.5 mA to 6 mA at VDD2 = 5.5 V, 3 mA to 3.5 mA at VDD2 = 3.3 V | mA | VDD2 = 5.5 V or VDD2 = 3.3 V |
| Operating Temperature Range | −40°C to +125°C | °C | |
| Insulation Voltage | 5000 V rms for 1 minute | V rms | UL 1577 |
Key Features
- On-chip digital isolation using iCoupler® technology
- Second-order sigma-delta (Σ-Δ) modulator
- Differential analog input range of ±250 mV (±320 mV full-scale)
- Low power operation: 15.5 mA typical at 5.5 V
- On-board reference and on-board digital isolator
- High-speed CMOS with monolithic air core transformer technology
- Serial I/O interface with 5 V or 3 V supply (VDD2)
- Operating temperature range of −40°C to +125°C
- 16-lead SOIC package
- Safety and regulatory approvals: UL recognition, CSA Component Acceptance Notice #5A, VDE Certificate of Conformity
Applications
- AC motor controls
- Shunt current monitoring
- Data acquisition systems
- Analog-to-digital and opto-isolator replacements
Q & A
- What is the primary function of the AD7400AYRWZ?
The AD7400AYRWZ is a second-order sigma-delta (Σ-Δ) modulator that converts an analog input signal into a high-speed, 1-bit data stream with on-chip digital isolation.
- What is the analog input range of the AD7400AYRWZ?
The analog input range is ±250 mV (±320 mV full-scale).
- What is the operating temperature range of the AD7400AYRWZ?
The operating temperature range is −40°C to +125°C.
- What type of package is the AD7400AYRWZ available in?
The AD7400AYRWZ is available in a 16-lead SOIC package.
- What are some of the key safety and regulatory approvals for the AD7400AYRWZ?
The device has UL recognition, CSA Component Acceptance Notice #5A, and VDE Certificate of Conformity.
- What is the typical current consumption of the AD7400AYRWZ at 5.5 V?
The typical current consumption is 11 mA to 13 mA for VDD1 and 4.5 mA to 6 mA for VDD2.
- Does the AD7400AYRWZ require external sample-and-hold circuitry?
No, the analog input is sampled continuously by the analog modulator, eliminating the need for external sample-and-hold circuitry.
- What is the data rate of the output stream from the AD7400AYRWZ?
The data rate is 10 MHz.
- How is the original information reconstructed from the output stream?
The original information can be reconstructed with an appropriate digital filter.
- What are some common applications of the AD7400AYRWZ?
Common applications include AC motor controls, shunt current monitoring, data acquisition systems, and analog-to-digital and opto-isolator replacements.
