Analog Inputs and Outputs

Functionality overview

Analog I/O commands control Red Pitaya’s slow analog channels on the extension connector. These provide DC voltage measurements (0-3.5V inputs) and generation (0-1.8V outputs) for interfacing with sensors, control circuits, and other analog peripherals.

Important notes

Analog inputs: 0 to +3.5V range (12-bit resolution).
Analog outputs: 0 to +1.8V range (12-bit resolution).
Not to be confused with fast RF inputs/outputs used for signal acquisition and generation.

Code examples

Here are some examples of how to use the analog I/O commands on Red Pitaya:

Analog examples.

Parameters and command table

Parameter options:

<ain> = {AIN0, AIN1, AIN2, AIN3}
<aout> = {AOUT0, AOUT1, AOUT2, AOUT3}
<pin> = {ain, aout}
<value> = {value in Volts}

Available Jupyter and API macros:

Analog outputs - RP_AOUT0, RP_AOUT1, ..., RP_AOUT3
Analog inputs - RP_AIN0, RP_AIN1, ..., RP_AIN3

SCPI	API, Jupyter	DESCRIPTION	ECOSYSTEM
`ANALOG:RST` Examples: `ANALOG:RST`	C++: `rp_ApinReset()` Python: `rp_ApinReset()`	Sets analog outputs to default values (0 V).	1.04-18 and up
`ANALOG:PIN <pin>,<value>` Examples: `ANALOG:PIN AOUT2,1.34`	C++: `rp_ApinSetValue(rp_apin_t pin, float value)` `rp_ApinSetValueRaw(rp_apin_t pin, uint32_t value)` Python: `rp_ApinSetValue(<pin>, <value>)` `rp_ApinSetValueRaw(<pin>, <value>)`	Set the analog voltage on the slow analog outputs. The voltage range of slow analog outputs is: 0 - 1.8 V	1.04-18 and up
`ANALOG:PIN? <pin>` > `<value>` Examples: `ANALOG:PIN? AOUT2` > `1.34` `ANALOG:PIN? AIN1` > `1.12`	C++: `rp_ApinGetValue(rp_apin_t pin, float* value, uint32_t* raw)` `rp_ApinGetValueRaw(rp_apin_t pin, uint32_t* value)` Python: `rp_ApinGetValue(<pin>)` `rp_ApinGetValueRaw(<pin>)`	Read the analog voltage from the slow analog inputs. The voltage range of slow analog inputs is: 0 - 3.3 V	1.04-18 and up
-	C++: `rp_ApinGetRange(rp_apin_t pin, float* min_val, float* max_val)` Python: `rp_ApinGetRange(<pin>)`	Get voltage range of the specified analog pin.	1.04-18 and up
-	C++: `rp_AIpinGetValue(int unsigned pin, float* value, uint32_t* raw)` `rp_AIpinGetValueRaw(int unsigned pin, uint32_t* value)` Python: `rp_AIpinGetValue(<pin>)` `rp_AIpinGetValueRaw(<pin>)`	Get the analog voltage on the slow analog inputs (Volts or RAW).	1.04-18 and up
-	C++: `rp_AOpinSetValue(int unsigned pin, float value)` `rp_AOpinSetValueRaw(int unsigned pin, uint32_t value)` Python: `rp_AOpinSetValue(<pin>, <value>)` `rp_AOpinSetValueRaw(<pin>, <value>)`	Set the output voltage on slow analog outputs.	1.04-18 and up
-	C++: `rp_AOpinGetValue(int unsigned pin, float* value, uint32_t* raw)` `rp_AOpinGetValueRaw(int unsigned pin, uint32_t* value)` Python: `rp_AOpinGetValue(<pin>)` `rp_AOpinGetValueRaw(<pin>)`	Get the output voltage on slow analog outputs.	1.04-18 and up
-	C++: `rp_AOpinGetRange(int unsigned pin, float* min_val, float* max_val)` Python: `rp_AOpinGetRange(<pin>)`	Get voltage range of the specified analog output pin.	1.04-18 and up