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868MHz OOK Receiver Module BM2302-68-2

US$1.25

Out of stock

Product ID

BM2302-68-2

The BM2302-68-2 is a 868MHz Low-IF OOK RF receiver module that has a built-in Low-IF OOK RF receiver IC of the Holtek BC2302D. Compared with the BM2302-6x-1 series, the BM2302-6x-2 series offers stronger anti-interference ability and a wider operating voltage range. The product needs to be used with an OOK modulation RF transmitter module.
It is suitable for applications of roller shutters, ceiling fans, clothes airers, and so on.

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PRODUCT FEATURES

Operating voltage: 2.4V~5.5V
Operating current: 5.5mA @5V
Deep Sleep mode current: 0.5μA @5V
RX sensitivity (5V, 25℃, BER = 0.1%): -107dBm @10Ksps
RF operating input power: -107dBm~+10dBm
Modulation: OOK
Symbol rate: 0.5Ksps~40Ksps
Interface: I²C (address: 0x23)
Dimension: 16 x 15 x 2.6 mm
Net weight: 1g

DESCRIPTION

Operation mode

The BM2302-6x-2 series offers four operation modes: Deep sleep mode, Auto RX mode, Sniff RX mode, and Configuration mode.
The product automatically enters deep sleep mode after powering on. In deep sleep mode, the power consumption is only 0.5μA. By controlling the DO / SDA and SD / SCL to enter RX mode or configuration mode.
Exit Auto RX mode: power off the module.

RX mode

You can select to enter Auto RX mode or Sniff RX mode to receive data.

Auto RX mode

Connect the SD/SCL pin to GND and then power on the module to enter Auto RX mode. The module automatically receives RF signals transmitted from the antenna and outputs the data to the DO / SDA pin after demodulating.

Sniff RX mode

Connect the module’s SD/SCL pins to the MCU to control the voltage level, and use the voltage level to determine whether the module enters the Sniff RX mode.
⬥ When SD / SCL pin is high (powering on the module): enter Deep Sleep mode
⬥ When SD / SCL pin is low: enter Sniff RX mode

Configuration mode

In configuration mode, you can configure the internal registers to determine the receiving channel through I²C interface. However, configuration mode is not required for normal operation.

To enter configuration mode, you need to connect both the SD / SCL and DO / SDA pins to the MCU and enter configuration mode after powering on. When the module is in configuration mode, the SD / SCL and DO / SDA pins are used as I²C interface. It can turn back to deep sleep mode by being set the CFOMSD = 1.

The sequence diagram of entering/exiting the configuration mode is as follows:

PIN DESCRIPTION

Pin	Pin name	Function
1	ANT	Antenna interface
2	GND	Ground
3	VDD	Power supply: 2.4V~5.5V
4	DO SDA	Demodulated data output (RX mode) I²C: data line (configuration mode)
5	SD SCL	Exit RX mode: low level I²C: clock line (configuration mode)

COMPARING

Function	BM2302-6x-2	BM2302-6x-1
Operating voltage	2.4V~5.5V	3.0V~5.5V
Operating current	4.0mA @433MHz	3.2mA @433MHz
Deep sleep mode current	0.5μA @5V	0.5μA @5V
RX sensitivity (@5V, 25℃, 433MHz)	-108dBm @10Ksps	-112dBm @10Ksps
RF input power (Max.)	+10dBm	+10dBm
Frequency band	315MHz/433MHz/ 868MHz/915MHz	315MHz/433MHz/ 868MHz/915MHz
Modulation	OOK	OOK
Symbol rate	0.5Ksps~40Ksps	1Ksps~20Ksps
Dimension	16 x 15 x 2.6mm	16 x 15 x 2.6mm

RESOURCES

MCU: Holtek BC2302C/D, Sub-1GHz Low-IF OOK RF Receiver, including datasheet, package information, etc.
Application note:
1. AN0633EN, BC2302C/D Development Board Application Note, including example program
2. AN0631EN, BC2302C/D & BC2302A/B Application Difference Instructions