SA618F30-DZ : 1W 8 Dual Antenna Multi-Level Relay Audio Module Full-Duplex With ESD Protection

The SA618F30-DZ is based on our company's SA618F30 module, with a design that separates the transmission and reception antennas. Additionally, the TXEN pin is externally extended, making it more convenient for customers to add an external radio frequency power amplifier. This allows for higher transmission power and enhanced communication distance. The module integrates a high-speed microcontroller, high-performance RF transceiver chip, and RF power amplifier. It also provides a standard serial port for communication with the module, enabling easy and quick setting of relevant parameters and control of the transceiving functions. By simply connecting an audio amplifier, microphone, and speaker to this module, it can function as a compact walkie-talkie. The simplified interface and ultra-small size of the module allow for its wide application and easy integration into various handheld devices, thereby improving the overall performance of the end product.
The SA618F30-DZ is strictly manufactured and tested using lead-free processes, complying with RoHS and Reach standards.

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Parameter	Test Conditions	Min.	Typ.	Max.	Unit
Operating voltage		3.3	4.2	5.5	V
working temperature		-30	25	70	℃
Current consumption
Sleep current			10	20	uA
RX current	@ No audio output		50	55	mA
RX current	@8Ω,1W audio output				mA
TX current	4v,@30dBm		450	550	mA
RF parameter
Operating frequency	UHF	410		490	MHz
Customizable frequency		150		960	MHz
Default frequency value for 16 channels	UHF ( 1MHz interval)	440.125		455.125	MHz
Transmit power	@5V	16		32	dBm
Bandwidth（BW)			500		KHz
Receiving sensitivity			-117		dBm
Audio parameters
Modulation sensitivity			10	100	mV
Receive signal-to-noise ratio(SNR)			90		dB
Frequency response		60		3800	Hz
Audio output（line out)	Load 16 Ω			40	mW
Delay parameters	2 channels	80	100	120	ms
	3 channels	120	160	180	ms
	4 channels	160	200	240	ms
	6 channels	240	300	360	ms
	8 channels	320	400	480	ms

Type	wireless audio
Output Power	1 W

Features of SA618F30-DZ wireless audio module

Block Diagram

Analog input analog output application circuit

I2S input and output application circuit

Pin definition

Pin NO.	Pin name	I/O	Description
1	TXLED	O	Transmitting indicator, connected with external led, turn on by low level output when data or voice is transmitting, (suggest 1K ohm resistor for current limitation)
2	RESET	I	Module reset pin, externally pull down for more than 5ms will reset the module
3,6,10, 12,14,15,19	GND		Connect to power negative
4	MIC_N_IN	I	Negative electrode of external microphone, serial connected with 220 nH inductance, refer to below typical circuit.
5	MIC_P_IN	I	Positive electrode of external microphone, serial connected with 220 nH inductance, refer to below typical circuit.
7	AUX_IN	I	Line in & Microphone input
8	LINE_OUT	O	Connected with 16 Ω earphones
9	RESERVED		NC
10	TXEN	O	Transmit enable pin, outputs high level (3.3V) when transmitting, low level when receiving
11	RXANT	O	RF signal input for reception, connect to 50-ohm antenna
13	TXANT	O	RF signal output for transmission, connect to 50-ohm antenna
14	VCC		Power supply ( 3.3 – 5.5V )
16	SDIN	I	Connected with External I2S device, ( 0 – 3.3V )
17	BCLK	O
18	WS	O
20	SD	O
21	PTT	I	Press to talk, pull down to enter transmission mode, pull high or leave open to enter receive mode, pull-up internally,
22	TXD	O	Serial communication
23	RXD	I	Serial communication
24	MCLK	O	Connected with External I2S device (0-3.3V)
25	RXLED	O	Receiving indicator, connected with external led, turn on by low level output when data or voice received, (suggest 1K ohm resistor for current limitation)
26	CS	I	Floating input, low level to enter sleep