Aria technical documentation Buy on-line
Power supply
Aria G25 needs a single line 3.3 volt DC power supply which can be provided in any combination on the following pins:
| Power lines | Aria pins |
|---|---|
| +3V3 DC power in | N1, S1, E24, W24 |
| GND signal ground | N24, S24, E1, W1 |
A simple and cheap module called PS3V3 is available from Acme SYstems.
It has a miniUSB connector and can
be integrate in your PCB as a SMD component.
 EUR 4.00 | PS-5V1A-EU-MUSB - Switching power supply with UE AC Plug and mini USB DC plug Switching power supply for PS3V3 DC/DC converter module:
|
Extended range power supply
If you need to get the power in an industrial or mobile environment here is illustrated a simple solution using this two modules:
In this way is is possible to provide to Aria from a 7 to 28 Volt DC source.
 EUR 10.00 | NETUSPS1 - Quad power supply module Power supply module that meets all the AT91SAM9G20 CPU power requirements and power-up and power-down sequences to guarantee reliable operations. | Product description | |
 EUR 12.00 | EPS - Extended Power Supply module EPS is a DC-DC converter with an input range of 7 to 28 Volt DC output 5 Volt DC @ 2A. | Product description | |
Power supervisor
In real life applications we suggest to add a reset supervisor circuit to assure correct startup sequences.
Here are two possibilities:
- Using a TPS3808G33 IC more flexible since it lets you to program the reset assertion delay with C52.
- Using a CAT811 IC that is cheaper but has a fixed 140ms delay.
RTC backup battery
Applying 3 Volt DC on E1 (GND) and E20 (VBAT +3VDC) it is possible to mantaint the RTC (Real Time Clock) active when the power supply if off. This will mantain the system clock up to 6 months with no power using a small CR1220 Lithium battery.
A bigger battery can be used to extend the time duration.
 EUR 1.00 | BAT-HOLDER-1 - Battery holder for lithium battery CR1220 Battery holder for lithium battery CR1220. Through hole mount. |
 EUR 1.00 | BAT-HOLDER-2 - Battery holder for lithium battery CR1220 Battery holder for lithium battery CR1220. SMT mount. |
 EUR 3.00 | CH23-1220 - 3V Lithium battery Lithium battery model CR1220 at 3 volt for RTC circuitry on: |
