SA828 : 1.5W Full-featured Miniature Walkie Talkie Module

SA828 : 1.5W Full-featured Miniature Walkie Talkie Module

SA828 is a high cost-effective full-featured walkie talkie module with 1.5W output power, it comes with built-in high performance microcontroller, narrow band RF transceiver IC and RF power amplifier, all parameters(CTCSS, CDCSS, SQ, Predefined channels etc.) can be easily modified by PC software, Users only need to add external power supply, speaker, and audio taper, then it becomes a miniature walkie talkie with 16 adjustable channels. Simplified interface and Ultra small size make this module widely used in various applications and conveniently embedded into various handheld.

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Parameter	Test condition	Min	Typ.	Max	Unit
Power supply		3.3	4.2	5.5	V
Working Temperature range		-30	25	70	℃
Current Consumption
Sleep current			≤3		uA
RX current			60		mA
TX current（High power）			800	900	mA
TX current（low power）			350	450	mA
Transmitting RF Parameters
Frequency range	UHF	400	450	480	MHz
Frequency range	VHF	134	150	174	MHz
Out power（high power）	@VCC=4.0V	30	31.5	32.5	dBm
Out power（low power）	@VCC=4.0V	25	26.5	28	dBm
modulation sensitivity	@1.5KHz/2.5KHz Frequency deviation		10		mV
Audio distortion	@1.5KHz/2.5KHz Frequency deviation		2	5	%
Signal to noise ratio	@1.5KHz/2.5KHz Frequency deviation	38	40	45	dB
Adjacent-channel power	@12.5K offset		-60		dBc
CTCSS modulated frequency deviation		0.35	0.5	0.75	KHz
RX frequency Parameter
RX sensitivity			-124		dBm
RX SNR	@1.5KHz Frequency deviation	45	50		dB
Audio output power			2		W
Audio output impedance			8		OHm

Features of walkie talkie module SA828

UHF Frequency : 400~480 MHz
VHF Frequency : 134~174 MHz
350 band frequency：320-400MHz (3 frequency bands are optional)
Tx and Rx frequency can be set alone
Bandwidth: 12.5 / 25 KHz
Output power up to 1.5W
Distance up to 4-5Km in open area
High Sensitivity：-124 dBm
High-integrated, Small Size
External potentiometer to adjust volume
38 CTCSS (can be set via PC software and serial port)
166 CDCSS (can be set via PC software and serial port)
8 level squelch
High/ low power is optional（500mW/1.5W）
Wide range of working voltage: 3.3-5.5 V
1 ppm KDS TCXO crystal, Stable performance

Application of walkie talkie module SA828

Small walkie talkie
Invisible intercom system
audio surveillance system
Outdoor Sport products
building community security system

Pin NO.	Pin name	Description
1	MIC+	External microphone positive
2	MIC-	External microphone cathode
3	VOXEN	VOX enable , 0: enable VOX; leave open or 1 to disable VOX
4	1	Encoding for 16 channel, 4bit organized the 16 channels. For example, if the bit is : 0110, it is channel 6. If it is 1001, it is channel 9. The Pin marked 8 means the maximum bit. The Pin marked 1 means the lowest bit.
5	2
6	8
7	4
8	H/L	High/low output power control; Leave open for high output power，low level to low output power.
9	SPKEN	Receive signal indicatie Pin, usually low level, turn high after receiving signal
10,11,13,21	GND	Exposed ground pad
12	ANT	Output for RF signal, External connect antenna with 50ohm
14,15	SPK	Output for Audio, External connect loudspeaker with 8 ohm /2W
16,17	VOL	Audio volume control, External connect 100K ohm rotary resistor
18	RXD	RXD of the module for UART, connect to TXD outside of the module
19	TXD	TXD of the module for UART, connect to RXD outside of the module
20	PTT	PTT of the walkie-talkie module, leave open or “1” is Rx, “0”is TX, Default receiving mode
22	VCC	External connect Positive supply 3.3~5V.
23	CS	“0” is for sleeping mode,”1” for normal working,， Default normal operation

> SA828 module operation video

> How to set data parameters for SA828 walkie talkie module

SA828 : 1.5W Full-featured Miniature Walkie Talkie Module

Features of walkie talkie module SA828

Application of walkie talkie module SA828

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