AD7625 driver¶

ADC driver for Analog Devices Inc. AD7625, AD7626, AD7960, and AD7961 devices. The module name is ad7625.

Supported devices¶

The following chips are supported by this driver:

The driver requires use of the Pulsar LVDS HDL project:

Pulsar LVDS HDL

To trigger conversions and enable subsequent data transfer, the devices require coupled PWM signals with a phase offset.

Supported features¶

Conversion control modes¶

The driver currently supports one of two possible LVDS conversion control methods.

Echoed-Clock interface mode¶

                                      +----------------+
           +xxxxxxxxxxxxxxxxxxxxxxxxxx| CNV            |
           X                          |                |
           v                          |    HOST        |
+----------------------------+        |                |
|      CNV+/CNV-   DCO+/DCO- |xxxxxxx>| CLK_IN         |
|                            |        |                |
|                            |        |                |
|       AD7625         D+/D- |xxxxxxx>| DATA_IN        |
|                            |        |                |
|                            |        |                |
|                  CLK+/CLK- |<xxxxxxx| CLK & CLK_GATE |
+----------------------------+        |                |
                                      +----------------+

Reference voltage¶

Three possible reference voltage sources are supported:

Internal reference (only available on AD7625 and AD7626)
External reference and internal buffer
External reference

The source is determined by the device tree. If ref-supply is present, then the external reference is used. If refin-supply is present, then the internal buffer is used. If neither is present, then the internal reference is used.

Unimplemented features¶

Self-clocked mode

Device attributes¶

The AD762x is a fully-differential ADC and has the following attributes:

Attribute	Description
`scale`	Scale factor to convert raw value from buffered reads to mV.

Device buffers¶

This driver supports IIO triggered buffers.

See Industrial IIO device buffers for more information.