AD8356A

ESMT
AD8356A
2.1-Channel Digital Audio Amplifier with Headphone Driver
Over-temperature protection
Under-voltage shutdown
Short-circuit protection
I2C control interface
Features
2
16/18/20/24-bit input with I S, Left-alignment
and Right-alignment data format
PSNR & DR(A-weighting)
Loudspeaker: 93dB (PSNR), 98dB (DR)
Headphone: 87dB (PSNR), 91dB (DR)
Multiple sampling frequencies (Fs)
32kHz / 44.1kHz / 48kHz and
64kHz / 88.2kHz / 96kHz
System clock = 64x, 128x, 192x, 256x, 384x,
512x, 576x, 768x, 1024x Fs
Supply voltage
3.0~12V for loudspeaker driver
3.0~3.3V for others
2.5~5.5V tolerant input interface
Loudspeaker output power ( @10% THD+N)
2×8.7W(Full,8Ω)+16.7W(Full, 4Ω) for 2.1-channel
2×4.3W(Half,4Ω)+16.7W(Full, 4Ω) for 2.1-channel
2×8.7W(Full,8Ω) for stereo
2×4.3W(Half,4Ω) for stereo
2×16.7W(Full, 4Ω) for stereo
Headphone power
34mW into [email protected] and 1% THD+N
65mW into [email protected] and 1% THD+N
110mW into [email protected] and 1% THD+N
200mW into [email protected] and 1% THD+N
Sound processing including:
Bass (+18dB~-12dB, 3dB frequency is 250Hz),
Treble (+18dB~-12dB, 3dB frequency is 7kHz),
5 bands parametric EQ,
Volume control (+24dB~-103dB, 1dB/step) and
Dynamic range control
Anti-pop design
Applications
CD and DVD
TV audio
Car audio
Boom-box
MP3 docking systems
Portable / Handheld
Powered speaker
Wireless audio
USB speaker
Description
This is a 2.1-channel fully digital audio amplifier with
output power which can deliver up to 2×8.7W to 8Ω
load for L,R channel and 16.7W to 4Ω load for
sub-woofer channel simultaneously with 12V supply
voltage. Using I2C digital control interface, AD8356A
provides sound processing includes Volume, Bass,
Treble, EQ, Mixing and Dynamic Range Control
(DRC). Users can use one AD8356A for stereo or
2.1-channel, two for 5.1-channel and three for
7.1-channel, respectively
ORDERING INFORMATION
Product Number
Package
Comments
AD8356A-KG
7x7 48L QFN
Pb-free
Reset
HPSPK
PD
I2C Control
Interface
MCLK
SA1
SA0
SCL
SDA
M0
M1
Functional Block Diagram
PLL
BCLK
SDATA0
SDATA1
SDATA2
LRCIN
Input
Interface
PLL_Byp
Audio Signal
Processing
Elite Semiconductor Memory Technology Inc.
HPL
Headphone Driver
or
HPR
Internal
System
Clock
Protection Circuits
PCM to
PWM
Loudspeaker Driver
ERROR
L
Subwoofer
R
Publication Date : Nov. 2005
Revision : 1.0
1/3
ESMT
AD8356A
HP-SPK 37
VDDRB 38
RB 39
GNDR 40
RA 41
VDDRA 42
VDDLA 43
LA 44
GNDL 45
LB 46
VDDLB 47
PLL_Byp 48
Pin Assignment
MCLK 1
36 HPL
PLLGND 2
35 HPR
PLLVDD 3
34 AGND
CLK_OUT 4
33 AVDD
32 PWMSA
DVDD 5
M0 6
31 DEF
DGND 7
30 SDA
M1 8
SDATA0 9
29 SCL
SDATA1 10
27 SA0
SDATA2 11
26 ERROR
28 SA1
25 PD
LRCIN 12
24 Reset
23 VDDSRB
22 SRB
21 GNDSR
20 SRA
19 VDDSRA
18 VDDSLA
17 SLA
16 GNDSL
15 SLB
14 VDDSLB
13 BCLK
Pin Description
PIN
NAME
TYPE
DESCRIPTION
CHARACTERISTICS
1
MCLK
I
Master clock input
5V tolerant Schmitt trigger TTL input buffer
2
PLLGND
P
Ground for PLL
3
PLLVDD
P
Supply for PLL
(Note1)
4
CLK_OUT
O
PLL output
5V tolerant TTL output buffer
5
DVDD
P
Digital Power
(Note1)
6
M0
I
Mode selection 0
5V tolerant Schmitt trigger TTL input buffer
7
DGND
P
Digital Ground
8
M1
I
Mode selection 1
5V tolerant Schmitt trigger TTL input buffer
9
SDATA0
I
Serial audio data input 0
5V tolerant Schmitt trigger TTL input buffer
10
SDATA1
I
Serial audio data input 1
5V tolerant Schmitt trigger TTL input buffer
11
SDATA2
I
Serial audio data input 2
5V tolerant Schmitt trigger TTL input buffer
12
LRCIN
I
Left/Right clock input (Fs)
5V tolerant Schmitt trigger TTL input buffer
13
BCLK
I
Bit clock input (64Fs)
5V tolerant Schmitt trigger TTL input buffer
14
VDDSLB
P
Supply for subwoofer-left channel B
(Note2)
15
SLB
O
Subwoofer-left channel output (-)
16
GNDSL
P
Ground for subwoofer-left channel
17
SLA
O
Subwoofer-left channel output (+)
18
VDDSLA
P
Supply for subwoofer-left channel A
(Note2)
19
VDDSRA
P
Supply for subwoofer-right channel A
(Note2)
20
SRA
O
Subwoofer-right channel output (+)
21
GNDSR
P
Ground for subwoofer-right channel
22
SRB
O
Subwoofer-right channel output (-)
Elite Semiconductor Memory Technology Inc.
Publication Date : Nov. 2005
Revision : 1.0
2/3
ESMT
AD8356A
23
VDDSRB
P
Supply for subwoofer-right channel B
(Note2)
24
Reset
I
Reset, low active
5V tolerant Schmitt trigger TTL input buffer
25
PD
I
Power down, low active
5V tolerant Schmitt trigger TTL input buffer
26
ERROR
O
ERROR output
Open-drain output
2
27
SA0
I
I C select address 0
5V tolerant Schmitt trigger TTL input buffer
28
SA1
I
I2C select address 1
5V tolerant Schmitt trigger TTL input buffer
2
29
SCL
I
I C serial clock input
5V tolerant Schmitt trigger TTL input buffer
30
SDA
I
I2C serial data input
31
DEF
I
Default volume, 0=Mute, 1=Un-Mute
5V tolerant Schmitt trigger TTL input buffer
32
PWMSA
O
Half-bridge, sub-woofer channel output
5V tolerant TTL output buffer
33
AVDD
P
Analog supply
(Note1)
34
AGND
P
Analog ground
35
HPR
O
Headphone right channel output
36
HPL
O
Headphone left channel output
37
HP-SPK
I
Headphone detection
38
VDDRB
P
Supply for right channel B
39
RB
O
Right channel output (-)
40
GNDR
P
Ground for Right channel
41
RA
O
Right channel output (+)
42
VDDRA
P
Supply for right channel A
(Note2)
43
VDDLA
P
Supply for left channel A
(Note2)
44
LA
O
Left channel output (+)
45
GNDL
P
Ground for left channel
46
LB
O
Left channel output (-)
47
VDDLB
P
Supply for left channel B
(Note2)
48
PLL_Byp
I
PLL Bypass
5V tolerant Schmitt trigger TTL input buffer
5V tolerant Schmitt trigger TTL input buffer
with open-drain output
(Note2)
Note1:These pins provide the supply for digital PWM controller, headphone drivers, built-in PLL and
protection circuits except for loudspeaker short-circuit protection circuits.
Note2:These pins provide the supply for loudspeaker driver stages, which are known as “PVDD”
Available Package
Package Type
Device No.
θja(℃/W)
Ψjt(℃/W)
θjc(℃/W)
Exposed Thermal Pad
7x7 48L QFN
AD8356A
23.5
1.6
12.5
Yes (Note3)
Note3:The thermal pad is at the bottom for QFN package. To optimize the performance of thermal dissipation,
solder the thermal pad to PCB’s ground plane is suggested.
Elite Semiconductor Memory Technology Inc.
Publication Date : Nov. 2005
Revision : 1.0
3/3