AD7606
Overvoltage Protection
Analog inputs support ±10V/±5V/±2.5V input range
Simultaneous Sampling
8 channels sample simultaneously, no channel delay
Integrated Sample & Hold
Integrated sample & hold amplifier ensures synchronization
Single Supply Operation
Simplifies power design, reduces system complexity
Product Overview
The AD7606 is an 8-channel simultaneous sampling analog-to-digital converter with 16-bit resolution and a sampling rate up to 200kSPS. This device is specifically designed for applications requiring multi-channel simultaneous sampling, such as power relay protection, motor control, and industrial data acquisition.
The AD7606 integrates sample & hold amplifiers, input clamping protection circuits, and a reference source, greatly simplifying system design. Its unique overvoltage protection feature allows analog input signals to exceed the supply rails, improving system robustness.
Expert Review: AD7606 is the preferred choice in the power relay protection industry, with strong anti-interference capability and excellent system stability.
Detailed Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Resolution | 16 | bit | No missing codes |
| Max Sampling Rate | 200 | kSPS | Supports lower sampling rates |
| Channels | 8 | Channels | Simultaneous sampling |
| Analog Input Range | ±10 / ±5 / ±2.5 | V | Selectable range |
| Power Consumption | 115 | mW | At 200kSPS |
| INL | ±0.5 | LSB | Max value |
| DNL | ±0.5 | LSB | Max value |
| SNR | 95 | dB | Typical value |
Internal Architecture
Typical Performance Curves
Application Areas
Power Relay Protection
Multi-phase power system monitoring and protection
Motor Control
Multi-axis servo system current detection
Industrial Data Acquisition
High-precision, multi-channel systems
Marine Power Systems
Offshore engineering power monitoring
Technical Resources
Frequently Asked Questions
What is the difference between AD7606 and AD7606B?
The AD7606B is an upgraded version of the AD7606. The main difference is that the sampling rate is higher, reaching up to 250kSPS, while the AD7606 has a maximum sampling rate of 200kSPS. In addition, the AD7606B has some performance optimizations, but the two are completely pin-compatible and can be seamlessly replaced.
Does AD7606 support multi-chip cascading?
Yes, the AD7606 supports multi-chip cascading to achieve simultaneous sampling with more channels. By sharing the CONVST signal, simultaneous sampling of multiple devices can be achieved. In cascade systems, special attention needs to be paid to timing design and drive capability.
How does the overvoltage protection feature of AD7606 work?
The AD7606 has a unique overvoltage protection function. The analog input can withstand ±12.6V voltage (exceeding the supply rail), which can prevent device damage caused by input signals exceeding the expected range. When the input exceeds the normal range, the device will automatically clamp to protect the internal circuitry.
How to design an anti-aliasing filter for AD7606?
Due to the internal integration of the sample & hold amplifier in the AD7606, the anti-aliasing filter design is relatively simple. An 8th-order Bessel filter is typically used, with the cutoff frequency set to approximately 0.4 times the sampling rate. For applications such as power relay protection, the filter order and type should be selected according to specific requirements.
What are the advantages of AD7606 in power relay protection applications?
The AD7606 has significant advantages in power relay protection applications: 8-channel simultaneous sampling ensures precise measurement of multi-phase power systems; built-in overvoltage protection improves system reliability; high precision (16-bit no missing codes) and high linearity meet the accuracy requirements of relay protection; low power consumption design helps system heat dissipation.
Purchase Consultation
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