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PDF WM8753 Data sheet ( Hoja de datos )
| Número de pieza | WM8753 | |
| Descripción | HI FI AND TELEPHONY DUAL CODEC | |
| Fabricantes | Wolfson Microelectronics plc | |
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WM8753L
Hi-Fi and Telephony Dual Codec
DESCRIPTION
The WM8753L is a low power, high quality stereo Codec with
integrated Voice CODEC designed for portable digital
telephony applications such as mobile phone, or headset with
Hi-Fi playback capability.
The device integrates dual interfaces to two differentially
connected microphones, and includes drivers for speakers,
headphone and earpiece. External component requirements
are reduced as no separate microphone or headphone
amplifiers are required, and Cap-less connections can be made
to all loads. Advanced on-chip digital signal processing
performs tone control, Bass Boost and automatic level control
for the microphone or line input through the ADC. The two
ADCs may be used to support Voice noise cancellation in a
partnering DSP, or for stereo recording.
The WM8753L Hi-Fi DAC can operate as a master or a slave,
with various master clock frequencies including 12 or 24MHz
for USB devices, 13MHz or 19.2MHz for cellular systems, or
standard 256fs rates like 12.288MHz and 24.576MHz. Internal
PLLs generate all required clocks for both Voice and Hi-Fi
converters. If audio system clocks already exist, the PLLs may
be committed to alternative uses.
The WM8753L operates at a nominal supply voltage of 2V,
although the digital core can operate at voltages down to 1.42V
to save power, and the maximum for all supplies is 3.6 Volts.
Different sections of the chip can also be powered down under
software control.
FEATURES
• Hi-Fi DAC: interfaced over I2S type link
• Audio sample rates:
8, 11.025, 16, 22.05, 24, 32, 44.1, 48, 88.2, 96
• DAC SNR 98dB, THD -84dB (‘A’ weighted @ 48kHz)
• ADC SNR 95dB, THD -82dB (‘A’ weighted @ 48kHz)
• On-chip Headphone Driver with cap-less output option
- 40mW output power on 16Ω / 3.3V
- with 16Ω load: SNR 90dB, THD –75dB
- with 10kΩ load: SNR 94dB, THD –90dB
• On-chip speaker driver with 0.5W into 8R
• Voice Codec: interfaced over Voice interface
• supports sample rates from 8ks/s to 48ks/s
• ADC and DAC SNR 82dB, THD -74dB
• Two Differential Microphone Interfaces
- Dual ADCs support noise cancellation in external DSP
- Programmable ALC / Noise Gate
• Low-noise bias supplied for electret microphones
Other features
• On-chip PLLs supporting 12, 13, 19.2MHz and other clocks
• Cap-less connection options to headphones, earpiece, spkr.
• Low power, low voltage
- 1.8V to 3.6V (digital core: 1.42V to 3.6V)
- power consumption <20mW all-on with 2V supplies
- <12mW for PCM CODEC operation
• 7x7x0.9mm QFN package, 5x5x0.9mm BGA package
APPLICATIONS
• MP3 Player / Recorder mobile phone
• Bluetooth stereo headset
WOLFSON MICROELECTRONICS plc
www.wolfsonmicro.com
Advanced Information, June 2004, Rev 3.1
Copyright 2004 Wolfson Microelectronics plc
1 page  
WM8753L
PIN DESCRIPTION
BGA
J2
H3
J3
H4
J4
J5
H5
J6
H6
J7
H7
J8
J9
G8
H9
G9
F9
E9
E8
D9
D8
C9
B9
A9
A8
B7
B6
A6
A5
B5
A4
B4
A3
B3
A2
A1
B1
C2
C1
D2
D1
E2
E1
PIN NO
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
NAME
VXDOUT
VXCLK
VXFS
LRC
BCLK
ADCDAT
DACDAT
MCLK
DBVDD
DCVDD
DGND
PCMCLK
GP2/CLK2
GP1/CLK1
PGND
PVDD
HPVDD
OUT4
OUT3
ROUT1
LOUT1
HP/SPKRGND
ROUT2
LOUT2
SPKRVDD
MONO2
MONO1
AVDD
AGND
VREF
VMID
MICBIAS
ACIN
ACOP
LINE1
LINE2
RXP
RXN
MIC1
MIC1N
MIC2
MIC2N
GPIO4
F1 44 MODE/GPIO3
F2 45 CSB/GPIO5
G1 46
H1 47
J1 48
SDIN
SCLK
VXDIN
TYPE
Digital Output
Digital Input/Output
Digital Input/Output
Digital Input/Output
Digital Input/Output
Digital Output
Digital Input
Digital Input
Supply
Supply
Supply
Digital Input
Digital Output
Digital Output
Supply
Supply
Supply
Analogue Output
Analogue Output
Analogue Output
Analogue Output
Supply
Analogue Output
Analogue Output
Supply
Analogue Output
Analogue Output
Supply
Supply
Reference
Reference
Analogue Output
Analogue Input
Analogue Output
Analogue Input
Analogue Input
Analogue Input
Analogue Input
Analogue Input
Analogue Input
Analogue Input
Analogue Input
Digital input/Output
Digital Input / Output
Digital Input / Output
Digital Input / Output
Digital Input
Digital Input
Advanced Information
DESCRIPTION
Voice ADC Output
Voice codec data clock / ADC frame clock
Voice Codec Frame Sync
DAC Frame Sync
DAC data clock input / output
ADC Digital Audio Data Alternative Output
DAC Digital Audio Data Input
Master Clock Input
Digital Buffer Supply (supply for digital I/O buffers)
Digital Core Supply (supply for digital logic, except I/O buffers)
Digital ground (all digital logic)
VOICE codec master clock input (may be looped from PLL output)
General Purpose Output 2, usually PLL2 output
General Purpose Output 1, usually PLL1 output
PLL ground
PLL Supply
Headphone Supply
Analogue Output 4 (Headphone driver)
Analogue Output 3 (Headphone driver)
Headphone Output Right
Headphone Output Left
Headphone and Speaker ground
Speaker Output Right
Speaker Output Left
Speaker Supply
Mono analogue output 2
Mono analogue output 1
Analogue supply (feeds ADC and DAC)
Analogue ground (feeds ADC and DAC)
Buffered ADC and DAC Reference voltage
Decoupling for ADC and DAC reference voltage
Microphone Bias
AC coupled input to ALC PGA in record path
ALC Mix output
Left Channel Input
Right Channel input
RX mono differential input positive signal
RX mono differential input negative signal
Mic Pre-amp input 1
Mic Pre-amp 1 common mode or negative input
Mic Pre-amp input 2
Mic Pre-amp 2 common mode or negative input
GPIO (General Purpose input/output) usually headphone jack insert
autodetect with selectable pull-up/pull-down.
Control interface Mode select on reset or GPIO3
3-wire MPU Chip Select / 2-wire MPU interface address selection or
GPIO5
3-wire MPU Data Input / 2-wire MPU Date Input / Acknowledge
3-wire MPU Clock Input / 2-wire MPU Clock Input
VOICE DAC Input
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AI Rev 3.1 June 2004
5
5 Page 
WM8753L
Advanced Information
POWER CONSUMPTION
The power consumption of the WM8753L depends on the following factors.
Supply voltages: Reducing the supply voltages also reduces supply currents, and therefore results in
significant power savings.
Operating mode: Power consumption is lower in mono modes than in stereo, as one ADC / DAC /
PGA is switched OFF. It is also reduced when the device is used for playback only (ADC off) or for
recording only (DAC off). Unused outputs should be switched off (for example, when line out is not
used, do not enable the LINE outputs).
Headphone volume: At high volume, the power dissipated in the headphone itself is greater than the
power consumption of the WM8753L. High headphone volume also increases the power consumption
of the on-chip headphone drivers.
MODE DESCRIPTION
All active (PCM, Stereo Mic, Stereo H/P Playback)
Headphone Playback Only
Line-Out Playback Only
Line Record Only (0dB gain)
Mic Record Only (29dB gain boost, ALC active)
Standby
Table 1 Power Consumption
POWER CONSUMPTION
MIN TYP
32
36
36
34
39
1.65
MAX
UNITS
mW
mW
mW
mW
mW
mW
Notes:
1. AVDD, HPVDD, DBVDD, DCVDD = 3.3V, TA = +25oC, fs = 48kHz
2. All channels are stereo.
3. All figures are quiescent, with no signal.
4. The power dissipated in the headphone itself is not included in the above table.
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AI Rev 3.1 June 2004
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet WM8753.PDF ] | |
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