AD6976D Datasheet V2.4

📎 原始文档：https://www.kdocs.cn/l/cdSErt2KNDGO

AD6976D Datasheet

Zhuhai Jieli Technology Co.,LTD

Copyright © Zhuhai Jieli Technology Co.,LTD. All rights reserved.

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The information contained herein is the exclusive property of JIELI and shall not be distributed, reproduced, or disclosed in whole or in part without prior written permission of JIELI.

AD6976D Features

CPU
32-bit DSP supports hardware Float Point Unit(FPU)
Up to l60MHz programmable processor 64Vectored interrupts
4 Levels interrupt priority

DSP Audio Processing

SBC, AAC Audio decodes supported for BT audio
mSBC voice codec supported for BT phone
Supports MP2, MP3, WMA, APE, FLAC, AAC, MP4, M4A, WAV, AIF, AIFC audio decoding
Packet Loss Concealment (PLC) for voice processing
Acoustic echo cancellation/suppression (AEC,AES)
Single/Dual analog/digital MIC Environmental Noise Cancellation (ENC)
Multi-band DRC limiter
20-band EQ configuration for voice Effects

Audio Codec

Two channels 24-bit DAC, SNR >= l0ldB Two channels 24-bit ADC , SNR >= 92dB
Sampling rates of
8KHz/ll.025KHz/l6KHz/22.05KHz/ 24KHz/32KHz/44 . lKHz/48KHz are supported
Two analog MIC amplifier, build-in MIC bias generator
Supports two PDM digital MIC inputs One channel Stereo analog MUX
Supports cap-less, single-ended, and differential mode at the DAC path
Supports l6ohm and 32ohm Speaker loading

Bluetooth

Compliant with Bluetooth
V5.3+BR+EDR+BLE specification
Meet class2 and class3 transmitting power requirement
Support GFSK and π/4 DQPSK all packet types
Provides maximum +8dbm transmitting
power
receiver with minimum-94dBm sensitivity
Fast AGC for enhanced dynamic range Supports
a2dp\avctp\avdtp\avrcp\hfp\spp\smp\att\gap
\gatt\rfcomm\sdp\l2cap profile
a2dp l.3.2\avctp l.4\avdtp l.3\ avrcp l.6.2\ hfp l.8 \spp l.2\rfcomm l. l\pnp l.3\ hid l. l. l\sdp core5.3\l2cap core 5.3

Peripherals

One full speed USB 2.0 OTG controller
Six multi-function 32-bit timers, support capture and PWM mode
Three full-duplex basic UART, support DMA mode
One hard ware IIC interface supports host and device mode
Built-in Cap Sense Key controller
Two Built-in low power Cap Sense Keys
l0-bit ADC for analog sampling
External wake up/interrupt on all GPIOs

PMU

Low voltage LDO and DC-DC for internal digital and analog circuit supply
2uA current consumption in the soft-off mode
Built-in LDO and DC-DC for the core, I/O, Bluetooth and flash
VBAT is 2.2V to 4.5V VDDIO is 2.2V to 3.4V
Packages
QFN32(4mm*4mm)
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Temperature
Operating temperature: -40℃ to +85℃
Storage temperature: -65℃ to +l50℃
Applications
Bluetooth TWS headsets
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1、 Pin Definition

1.1 Pin Assignment

Figure 1-1 AD6976D Package Diagram

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1.2 Pin Description

Table 1-1 AD6976D Pin Description

PIN NO	Name	I/O	Drive	Function	Other Function
.		Type
1	DACVSS	P	/		Analog Ground
2	HPVDD	P	/		Headphone AMP Power
3	VDDIO	P	/		IO Power 3.3v
4	PB8	I/O	8/24	GPIO	MIC1： MIC1 Input Channel； UART0RXB：Uart0 Data Input(B)； CAP4： Timer4 Capture；
5	PB7	I/O	8/24	GPIO	MIC_BIAS1： MIC1 BiasOutput； UART0TXB：Uart0 Data Output(B);
6	PB6	I/O	8/24	GPIO	UART1RXA：Uart1 Data Input(A)； PWM2： Timer2 PWM Output； ADC9：ADC Input Channel 9； Touch7： Touch Input Channel 7;
7	PGND	P	/		DCDC Ground
8	SW	P	/		DCDC switch output, connected to inductor
9	VBAT	P	/		Power Supply, connect to battery
10	LDO_IN	P	/		Charge Power Input; UART0TXC：Uart0 Data Output(C); UART0RXC：Uart0 Data Input(C); PWM3： Timer3 PWM Output； CAP1： Timer1 Capture;
11	BT_AVDD	P	/	GPIO	BT Power
12	PB3	I/O	8/24	GPIO
	EVDD	P	/		EVDD：Supply volte to peripherals
13	PB2	I/O	8/24	GPIO	UART2RXC：Uart2 Data Input(C); SPI2DOC：SPI2 Data Out(C); CAP5： Timer5 Capture; ADC7：ADC Input Channel 7；
					LP_TH1： Low Power Touch Channel 1
14	PB1	I/O	8/24	GPIO (pull up)	Long Press Reset； SPI2CLKC：SPI2 Clk(C); UART2TXC：Uart2 Data Output(C) ADC6：ADC Input Channel 6； LP_TH0： Low Power Touch Channel 0
15	PB0	I/O	8	GPIO	SPI2_DIC：SPI2 Data In(C);

(mA)
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				(High Voltage Input)	ALNK_MCLK(B)：ALNK1 Master Clock(B); TMR4： Timer4 Clock Input;
16	BT_RF	/	/		BT Antenna
17	VSSIO	P	/		Ground
18	BT_OSCI	I	/		BTOSC In
19	BT_OSCO	O	/		BTOSC Out
20	PC5	I/O	8/24	GPIO	UART2RXD：Uart2 Data Input(D); SPI1DOB：SPI1 Data Out(B); ALNK_DAT3(B)：Audio Link Data3(B); IIC_SDA_B：IIC SDA(B)； ADC5：ADC Input Channel 5；
21	PC4	I/O	8/24	GPIO	UART2TXD：Uart2 Data Output(D); SPI1CLKB：SPI1 Clock(B); ALNK_DAT2(B)：Audio Link Data2(B); IIC_SCL_B：IIC SCL(B)； ADC4：ADC Input Channel 4； PWM4： Timer4 PWM Output；
22	PC3	I/O	8/24	GPIO	UART0RXD：Uart0 Data Input(D); SPI1DIB：SPI1 Data In(B); ALNK_LRCK(B)：Audio Link Word Select(B); IIC_SDA_C：IIC SDA(C)； TMR3： Timer3 Clock Input;
23	PC2	I/O	8/24	GPIO	ALNK_SCLK(B)：Audio Link Serial Clock(B); IIC_SCL_C：IIC SCL(C)； UART0TXD：Uart0 Data Output(D); TMR1： Timer1 Clock Input;
24	USBDM	I/O	4	USB Negative Data	UART1RXD：Uart1 Data Input(D)； IIC_SDA_A：IIC SDA(A)； ADC11：ADC Input Channel 11；
25	USBDP	I/O	4	USB Positive Data	UART1TXD：Uart1 Data Output(D)； IIC_SCL_A：IIC SCL(A)； ADC10：ADC Input Channel 10；
26	PA3	I/O	8/24	GPIO	UART2TXA：Uart2 Data Output(A); ADC0：ADC Input Channel 0；
					PWM1： Timer1 PWM Output； Touch0： Touch Input Channel 0;
27	PA1	I/O	8/24	GPIO	MIC0： MIC0 Input Channel ; PWM0： Timer0 PWM Output； UART1TXC：Uart1 Data Output(C)；
28	DACR	O	/		DAC Right Channel
29	DACL	O	/		DAC Left Channel

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30	NC
3l	NC
32	VCOM	P	/		DAC reference voltage

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2、 Electrical Characteristics

2.1 Absolute Maximum Ratings

Table 2-l

V3.3IO	3.3V IO Input Voltage	-0.3	3.6	V

Symbol	Parameter	Min	Max	Unit
Topt	Operating temperature	-40	+85	°C
Tstg	Storage temperature	-65	+l50	°C
VBAT	Supply Voltage	-0.3	4.5	V
LDO_IN	Charger Voltage	-0.3	6	V

Note : The chip can be damaged by any stress in excess of the absolute maximum ratings listed below

2.2 PMU Characteristics

Table 2-2

Symbol	Parameter	Min	Typ	Max	Unit	Test Conditions
VBAT	Voltage Input	2.2	3.7	4.2	V
LDO_IN	Charger supply Voltage	4.5	5.0	5.5	V
Normal mode
VDDIO	Voltage output	_	3.0	_	V	VBAT = 4.2V, l0mA loading
	Loading current	_	_	l00	mA	VDDIO=3V@VBAT = 4.2V
BT_AVDD	Voltage output	_	l.3	_	V	VDDIO=3.0V, l0mA loading
	Loading current	_	_	60	mA	BT_AVDD=l.25V@VDDIO=3.0v
EVDD	Voltage output	_	l. l	_	V	BT_AVDD=l.25V, lmA loading
	Loading current	_	_	5	mA	EVDD=l.lV@BT_AVDD=l.25v
LP mode

VDDIO	Loading current			5	mA	VDDIO=3V@VBAT = 4.2V

2.3 Battery Charge

Table 2-3

Symbol	Parameter	Min	Typ	Max	Unit	Test Conditions
LDO_IN	Charge Input Voltage	4.5	5	5.5	V	_
VCharge	Charge Voltage	4. l5	4.2	4.25	V	LDO_IN＞4.5V

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		4.30	4.35	4.40	V	LDO_IN＞4.65V
ICharge	Charge Current	20		200	mA	Charge current at fast charge mode
ITrikl	Trickle Charge Current	20	45	70	mA	VBAT<VTrikl

2.4 IO Input/Output Electrical Logical Characteristics

Table 2-4

IO input characteristics
Symbol	Parameter	Min	Typ	Max	Unit	Test Conditions
VIL	Low-Level Input Voltage	-0.3	_	0.3* VDDIO	V	VDDIO = 3.3V
VIH	High-Level Input Voltage	0.7* VDDIO	_	VDDIO+0.3	V	VDDIO = 3.3V
IO output characteristics
VOL	Low-Level Output Voltage	_	_	0.33	V	VDDIO = 3.3V
VOH	High-Level Output Voltage	2.7	_	_	V	VDDIO = 3.3V

2.5 Internal Resistor Characteristics

Table 2-5

Port	General Output	High Drive	Internal Pull-Up Resistor	Internal Pull-Down Resistor	Comment
PA1~PA3 PC2~PC5 PB3~PB3 PB6~PB8	8mA	24mA	10K	10K	1、 PB1 default pull up 2、USBDM & USBDP default pull down 3、 internal pull-up/pull-down resistance
PB0	8mA	_	10K	10K
USBDP	4mA	_	1.5K	15K
USBDM	4mA	_	180K	15K

2.6 DAC Characteristics

Table 2-6

Parameter	Min	Typ	Max	Unit	Test Conditions
Frequency Response	20	_	20K	Hz	1KHz/0dB 10Kohm loading With A-Weighted Filter
THD+N	_	-80	_	dB
S/N	_	101	_	dB
Crosstalk	_	-80	_	dB

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Output Swing		0.45		Vrms
Dynamic Range		90		dB	lKHz/-60dB l0Kohm loading With A-Weighted Filter
DAC Output Power	_	4	_	mW	32ohm loading

2.7 ADC Characteristics

Table 2-7

Parameter	Min	Typ	Max	Unit	Test Conditions
Dynamic Range		92		dB	Fsample=44. lkHz Fin=lKHz 2mVpp Input
S/N	_	92	_	dB	Fsample=44. lkHz Fin=lKHz l.2Vpp Input
THD+N	_	-75	_	dB
Crosstalk	_	-80	_	dB

2.8 BT Characteristics

2.8.1 Transmitter

Basic Data Rate Table 2-8

Parameter		Typ	Max	Unit	Test Conditions
RF Transmit Power		6	8	dBm	25℃, Power Supply VBAT=5V 244lMHz
RF Power Control Range		20		dB
20dB Bandwidth		950		KHz
Adjacent Channel Transmit Power	+2MHz	-40		dBm
	-2MHz	-38		dBm
	+3MHz	-44		dBm
	-3MHz	-35		dBm

Table 2-9

Parameter		Typ	Unit	Test Conditions
Relative Power		-l	dB	25℃, Power Supply VBAT=5V 244lMHz
π/4 DQPSK Modulation Accuracy	DEVM RMS	6	%
	DEVM 99%	l0	%
	DEVM Peak	l5	%
Adjacent Channel	+2MHz	-40	dBm
	-2MHz	-38	dBm

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Transmit Power	+3MHz		-44		dBm
	-3MHz		-35		dBm

2.8.2 Receiver

Basic Data Rate Table 2-10

Parameter		Typ	Unit	Test Conditions
Sensitivity		-94	dBm	25℃, Power Supply VBAT=5V 2441MHz
Co-channel Interference Rejection		-13	dB
Adjacent Channel Interference Rejection	+1MHz	+5	dB
	-1MHz	+2	dB
	+2MHz	+37	dB
	-2MHz	+36	dB
	+3MHz	+40	dB
	-3MHz	+35	dB

Enhanced Data Rate Table 2-11

Parameter		Typ	Unit	Test Conditions
Sensitivity		-94	dBm	25℃, Power Supply VBAT=5V 2441MHz
Co-channel Interference Rejection		-13	dB
Adjacent Channel Interference Rejection	+1MHz	+5	dB
	-1MHz	+2	dB
	+2MHz	+37	dB
	-2MHz	+36	dB
	+3MHz	+40	dB
	-3MHz	+35	dB

2.8.3 BLE Transmitter

1M Data Rate Table 2-12

		Min	Typ	Max	Unit	Test Conditions
Sensitivity			-94		dBm	25℃, Power Supply VBAT=5V 2441MHz
RF Transmit Power			7	9	dB
In-band Spurious Emission	+2MHz		-42	-20	dB
	-2MHz		-34	-20	dB
	+3MHz		-46	-30	dB
	-3MHz		-36	-30	dB
Modulation	Δf1 avg	225	247

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Characteristics	Δf2 99%	185	236
	Δf1avg/Δf2av	0.8	0.9
Carrier Frequency Offset		-150	+/-10	+150	KHz
Frequency Drift		-50	+/-5	+50	KHz
Frequency Drift Rate		-20	3	+20	KHz/50us

2M Data Rate
Table 2-13

Parameter		Min	Typ	Max	Unit	Test Conditions
Sensitivity			-94		dBm	25℃, Power Supply VBAT=5V 2441MHz
RF Transmit Power			7	9	dB
Adjacent Channel Transmit	+2MHz		-46	-20	dB
	-2MHz		-38	-20	dB
	+3MHz		-53	-30	dB
	-3MHz		-42	-30	dB
Frequency Deviation	Δf1 avg	450	520
	Δf2 99%	370	500
	Δf1avg/Δf2av	0.8	0.9
Carrier Frequency Offset		-150	+/-10	+150	KHz
Frequency Drift		-50	+/-5	+50	KHz
Frequency Drift Rate		-20	+/-3	+20	KHz/50us

2.9 ESD Protection

Parameter	Typ.	Test pin	Reference standard
Human Body Mode	±4KV	All pins	JEDEC EIA/JESD22-A114
Machine Mode	±200V	All pins	JEDEC EIA/JESD22-A115
Charge Device Model	± 1KV	All pins	JEDEC EIA/JESD22-C101F
Latch up	±200mA	All GPIO pins	JEDEC STANDARD NO.78E
	1.5xVopmax	All power pins

Note : 1.5xVopmax = 1.5 times maximum operating voltage
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3、 Package Information

3.1 QFN32_4.0x4.0

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4、 Revision History

Date	Revision	Description
2020.08. l8	V2.0	Initial Release
2020. l0. l2	V2. l	Update PMU characteristics Add Bluetooth profiles version number

Add Bluetooth LE characteristics
Update Bluetooth characteristics， Charge characteristics, Audio
characteristics
Update Bluetooth and profile Visions
Add Chip ESD Protection Characteristics
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