About VDDs of 52833

RE: About VDDs of 52833

ketiljo — Tue, 28 Feb 2023 09:33:53 GMT

[quote user="HuiHuang"]

1. All VDD pins must be externally connected. They are internally connected as well but the connection on the die isn't good enough to carry the current.

RE: it means no difference ?

[/quote]

The voltage on all pins must be the same, yes.

[quote user="HuiHuang"]

2. Please refer to the reference schematic

RE： it didnot show what type of power VDD_nRF is ， LDO must or, DCDC？ could you check it ?

[/quote]

As long as the voltage on the VDD pins is between 1.8 and 3.6 V, it doesn't matter if you supply it with a LDO or DCDC converter. In case you use a DCDC, make sure that the supply is properly filtered so any noise from the DCDC converter doesn't influence the radio.

[quote user="HuiHuang"]

3. The occupied bandwidth for a 2 Mbps BLE carrier is 2.1 MHz. For 1 Mbps and coded phy, it's ~1 MHz. Both S2 and S8 are using a 1 Mbps carrier.

RE： coded phy only support in 1Mbps？

what kind of application will use this function(coded) ? (take example ? )

[/quote]

Coded PHY is using 1 Mbps modulation on air bit forward error correction is added so the sensitivity of the receiver is better. https://www.bluetooth.com/blog/exploring-bluetooth-5-going-the-distance/

RE: About VDDs of 52833

HuiHuang — Mon, 27 Feb 2023 08:42:31 GMT

1. All VDD pins must be externally connected. They are internally connected as well but the connection on the die isn't good enough to carry the current.

RE: it means no difference ?

2. Please refer to the reference schematic

RE： it didnot show what type of power VDD_nRF is ， LDO must or, DCDC？ could you check it ?

3. The occupied bandwidth for a 2 Mbps BLE carrier is 2.1 MHz. For 1 Mbps and coded phy, it's ~1 MHz. Both S2 and S8 are using a 1 Mbps carrier.

RE： coded phy only support in 1Mbps？

what kind of application will use this function(coded) ? (take example ? )

THX

RE: About VDDs of 52833

ketiljo — Mon, 27 Feb 2023 08:27:14 GMT

1. All VDD pins must be externally connected. They are internally connected as well but the connection on the die isn't good enough to carry the current.

2. Please refer to the reference schematic. https://infocenter.nordicsemi.com/topic/ps_nrf52833/ref_circuitry.html

3. The occupied bandwidth for a 2 Mbps BLE carrier is 2.1 MHz. For 1 Mbps and coded phy, it's ~1 MHz. Both S2 and S8 are using a 1 Mbps carrier.