Understanding the AD7606 Chip: A Classic ADC

In Simple Terms:

The AD7606 is a 16-bit multi-channel synchronous sampling ADC, widely used in many acquisition systems. It has been the most utilized ADC since I started working. Even though I have changed jobs twice, this chip remains a key component in the products of every company I have worked for. Imagine if you used a common chip during an interview at a company; that would certainly be a memorable coincidence.

When using the AD7606, it is important to note the differences between the AD7606 and AD7606B. The two are fully compatible in hardware mode and meet most application scenarios; however, the AD7606B offers some more advanced features in software mode.

To learn about the applications of this chip, you can directly purchase the AD7606 acquisition module or try to design the module yourself. I strongly recommend that those who are good at hands-on work should design it themselves!

Below are some official statements. Interested readers might want to read carefully. If the introduction is insufficient, you can directly access the materials shared at the end of the article or visit the official website.

Official Words (Just a quick overview! For detailed content, refer to the manual and the materials at the end of the article):

The AD7606/AD7606-6/AD7606-4 are 16-bit, 8/6/4 channel synchronous sampling Analog-to-Digital Conversion (ADC) systems. Each device includes built-in analog input clamping protection, second-order anti-aliasing filters, sample-and-hold amplifiers, 16-bit charge redistribution successive approximation ADCs, flexible digital filters, a 2.5 V reference voltage source, reference voltage buffering, and high-speed serial and parallel interfaces.

The AD7606/AD7606-6/AD7606-4 operates on a single 5 V power supply and can handle true bipolar input signals of ±10 V and ±5 V, while all channels can sample at a throughput rate of up to 200 kSPS. The input clamping protection circuit can withstand voltages up to ±16.5 V. Regardless of the sampling frequency, the analog input impedance of the AD7606 is 1 MΩ. It operates on a single power supply with on-chip filtering and high input impedance, eliminating the need for external operational amplifiers and bipolar power supplies. The 3 dB cutoff frequency of the anti-aliasing filter for the AD7606/AD7606-6/AD7606-4 is 22 kHz; when the sampling rate is 200 kSPS, it has a 40 dB anti-aliasing suppression characteristic. The flexible digital filter is pin-driven and can improve the signal-to-noise ratio (SNR) while reducing the 3 dB bandwidth.

Schematic and Modules (As long as there are ready-made modules, there is still a lot of information):

Here is the schematic information of a ready-made module found online. With the schematic, replicating and applying it becomes much easier. It also includes code examples; for more information, please download the material file directly.

Official Website Portal:

AD7606 Official Website:

https://www.analog.com/cn/products/ad7606.html#documentation

Resource Access Address:

Files shared via cloud storage:AD7606 Learning Materials.zip (Contents include: chip manual, schematic, program examples)

Link: https://pan.baidu.com/s/1huxgUchItTaLGTLBmVMvqg?pwd=gffk

Extraction Code: gffk

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