SA326 : Low-Latency & High Fidelity Wireless Audio Module

SA326 : Low-Latency & High Fidelity Wireless Audio Module

NiceRF launched a new low-latency, long-distance, high-sampling rate, high-fidelity wireless audio module SA326. SA326 series products are divided into transmitter module SA326-TX and receiver module SA326-RX. This product is an application board for SA316-TX and SA316-RX modules. It can work after power-on. You can also directly set the frequency of the module with PC software. , Sound size and other parameters, greatly simplify the user's development difficulty, this product is widely used in occasions with relatively high sound quality requirements.

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Parameter	Test Conditions	Min.	Typ.	Max.	Unit
Operating voltage range		3.3	4.2	5	V
Range of working temperature		-20	25	60	℃
Operating frequency range	@UHF	500		980	MHz
Operating frequency range	@VHF	160		270	MHz
Audio transmission and reception delay			4		ms
Serial port baud rate			9600		bps
Current consumption
Sleep current（SA326-RX)			< 45		uA
Sleep current（SA326F30-TX)			< 20		uA
Receive current（SA326-RX)	@VCC=4.2V		< 140		mA
Transmit Current（SA326-TX）	@Not Transmitting		< 75		mA
Transmit Current（SA326-TX）	@ During Transmission		<120		mA
Emission current（SA326F30-TX）	@Not Transmitting,5v		< 75		mA
Emission current（SA326F30-TX）	@During Transmission,5v 30dBm		< 700		mA
Transmit parameter
Transmit power	@VCC=4.2V	9	10	11	dBm
Transmit power	@VCC=5.0V	29	30	31	dBm
transmit power range	@VCC=4.2V	0		10	dBm
transmit power range	@VCC=5.0V	20		30	dBm
Emission bandwidth（BW)			300		KHz
Adjacent channel power ratio（ACPR）	@600KHZ		-60		dBc
Maximum microphone input voltage			0.3	1.5	Vrms
Audio frequency response range		30		20k	Hz
Receive parameters
Receiving sensitivity			-96		dBm
Audio output amplitude (differential)			400		mVrms
Audio output drive resistance			600		Ohm
LOUT+,ROUT+Driving Resistor			16-32		Ohm
SPKP,SPKN Driving Resistor			4-8		Ohm
Signal to Noise Ratio (SNR)	@1KHz，		86		dB
Total harmonic distortion (THD)	@48K Sampling Rate		0.07		%

Type	Wireless audio
Output Power	10mW

Features of SA326 wireless audio module

UHF frequency band：500MHz/868 /915MHz, UHF frequency band：500~980 MHz, VHF frequency band：160~270 MHz
The transmission distance is 200 meters in the open area
Receiving sensitivity: -96 dBm
Audio signal to noise ratio: 86 dB
Frequency response: 20 Hz-20 KHz
The delay from microphone input to audio output is less than 3ms
Digital modulation method: pi/4 DQPSK
Occupied bandwidth: <300 KHz
Transmission rate: 204.8 Ksps
Sampling rate: 48 KHz

Applications of SA326 wireless audio module

Wired speakers become wireless speakers
wireless microphone
Wireless Headphones
High-quality wireless audio transmission

SA326-TX

SA326-RX

Interface description of wireless audio module SA326-RX

SA326-TX

Pins of wireless audio module SA326-TX

Pin NO.	Pin name	I/O	Level standard	Description
1	GND		0	Connect the negative pole of the power supply
2	1	I	0-3.3V	Frequency 16 channel 8421 encoding, the first digit, default "1" output
3	2	I	0-3.3V	Frequency 16-channel 8421 encoding, the second bit, default "1" output
4	4	I	0-3.3V	Frequency 16 channel 8421 encoding, the 4th bit, default "1" output
5	8	I	0-3.3V	Frequency 16 channel 8421 encoding, the 8th bit, default "1" output
6	CS	I/O	0-3.3V	Internally connected to the EN of the LDO, pull down the dormancy, internal pull-up, default "1" output
7	GND		0	Connect the negative pole of the power supply
8	VCC		3.3-6V	The positive pole of the external power supply. (Typical value 4V)
9	GPIO0	I/O	0-3.3V	Internally connected to GPIO0 of SA316-TX, when using I2S mode, it can be configured as LRCK
10	GPIO1	I/O	0-3.3V	Internally connected to GPIO1 of SA316-TX, when using I2S mode, it can be configured as SCK
11	GPIO2	I/O	0-3.3V	Internally connected to GPIO2 of SA316-TX, when using I2S mode, it can be configured as MCLK
12	GPIO3	I/O	0-3.3V	Connect to GPIO3 of SA316-TX, it can be configured as SDIN when using I2S mode
13	GPIO4	I/0	0-3.3V	GPIO4 with internal audio chip
14，15	GND		0	Connect the negative pole of the power supply
16	MIC_P	I		Microphone input positive terminal, (the best signal is less than 300mVrms)

SA326-RX

Pins of wireless audio module SA326-RX

Pin NO.	Pin name	I/O	Level standard	Description
1	1	I	0-3.3V	Frequency 16 channel 8421 encoding, the first digit, default "1" output
2	2	I	0-3.3V	Frequency 16-channel 8421 encoding, the second bit, default "1" output
3	4	I	0-3.3V	Frequency 16 channel 8421 encoding, the 4th bit, default "1" output
4	8	I	0-3.3V	Frequency 16 channel 8421 encoding, the 8th bit, default "1" output
5	GPIO4	I/O	0-3.3V	Connect to GPIO4 of SA316-RX
6	GPIO3	I/O	0-3.3V	Internally connected to GPIO3 of SA316-RX, it can be configured as MCLK when using I2S mode
7	GPIO2	I/O	0-3.3V	Internally connected to GPIO2 of SA316-RX, when using I2S mode, it can be configured as SDIO
8	CS	I/O	0-3.3V	Internally connected to the EN of the LDO, pull down the dormancy, internal pull-up, default "1" output
9	GND	I	0	Connect the negative pole of the power supply
10	VCC	I	3.3-6V	The positive pole of the external power supply. (Typical value 4V)
11	GPIO1	I/O	0-3.3V	Internally connected to GPIO1 of SA316-RX, when using I2S mode, it can be configured as SCK
12	GPIO0	I/O	0-3.3V	Internally connected to GPIO0 of SA316-RX, when using I2S mode, it can be configured as LRCK
13	GND	I	0	Connect the negative pole of the power supply
14	LOUL LOUT+	O		Connect to LOUT+ of SA316-RX, which can directly drive earphones
15	GND	I	0	Connect the negative pole of the power supply
16	ROUT+	O		Connect to ROUT+ of SA316-RX, which can directly drive earphones
17	GND	I	0	Connect the negative pole of the power supply
18	VOL-ADJ	I	3.33. 3.3V	Volume adjustment pin, the module has been connected to a 50K ohm adjustable potentiometer, and an external potentiometer can be connected
19	SPKN	O		Power amplifier output pin, external 4 ohm or 8 ohm 2W speaker
20	SPKP	O		Power amplifier output pin, external 4 ohm or 8 ohm 2W speaker

SA326-TX

Mechanical dimensions of wireless audio module SA326-TX

SA326-RX

Mechanical dimensions of wireless audio module SA326-RX

SA326 : Low-Latency & High Fidelity Wireless Audio Module

Features of SA326 wireless audio module

Applications of SA326 wireless audio module

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