Key facts
- Brand
- Analog Devices
- Model
- AD7738
- Category
- Other Electronics
- Documents
- 2
- Languages
- EN
- Last added
- 2012-08-02
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Analog Devices AN-626 Application Note Using the AD7738 Checksum Register
This application note describes the use of the AD7738's checksum register to verify data integrity in noisy electrical environments. The document explains that the checksum register functions as a 16-bit linear feedback shift register (LFSR) that updates predictably based on data written to or read from the ADC. By monitoring this register, users can confirm that configuration data or conversion results have been received correctly without reading back every individual byte.
Read onlineAnalog Devices AD7738 specifications
| Checksum Register Size | 16-bit |
|---|---|
| LFSR Cycle Length | 65,535 cycles |
| Feedback Positions | Bits 0, 1, 2, and 5 |
Source: Analog Devices AN-626 Application Note Using the AD7738 Checksum Register
All Analog Devices AD7738 documents by type
How to use the product for one specific task, with worked examples.
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
Which devices does this application note cover?
The note refers solely to the AD7738 but is fully applicable to the AD7732, AD7734, and AD7739.
From: Analog Devices AN-626 Application Note Using the AD7738 Checksum Register
What value is read back after a 32 ones reset?
After a 32 ones reset or a reset using the RESET pin, the register should read back 0xE45E.
From: Analog Devices AN-626 Application Note Using the AD7738 Checksum Register
What are the input voltage ranges for the AD7738?
The device supports +625 mV, +1.25 V, and +2.5 V input ranges.
Is the AD7738 compatible with SPI?
Yes, it supports a 3-wire serial interface compatible with SPI, QSPI, MICROWIRE, and DSP.