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PDF WM8973 Data sheet ( Hoja de datos )
| Número de pieza | WM8973 | |
| Descripción | STEREO CODEC FOR PORTABLE AUDIO APPLICATIONS | |
| Fabricantes | Wolfson Microelectronics plc | |
| Logotipo |  |
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WM8973L
Stereo CODEC for Portable Audio Applications
DESCRIPTION
The WM8973L is a low power, high quality stereo CODEC
designed for portable digital audio applications.
The device integrates complete interfaces to stereo or mono
microphones and a stereo headphone. External component
requirements are drastically reduced as no separate
microphone or headphone amplifiers are required.
Advanced on-chip digital signal processing performs
graphic equaliser, 3-D sound enhancement and automatic
level control for the microphone or line input.
The WM8973L can operate as a master or a slave, with
various master clock frequencies including 12 or 24MHz for
USB devices, or standard 256fs rates like 12.288MHz and
24.576MHz. Different audio sample rates such as 96kHz,
48kHz, 44.1kHz are generated directly from the master
clock without the need for an external PLL.
The WM8973L operates at supply voltages down to 1.8V,
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.
The WM8973L is supplied in a very small and thin 5x5mm
QFN package, ideal for use in hand-held and portable
systems.
BLOCK DIAGRAM
FEATURES
• DAC SNR 98dB (‘A’ weighted), THD –84dB at 48kHz, 3.3V
• ADC SNR 95dB (‘A’ weighted), THD -82dB at 48kHz, 3.3V
• Complete Stereo / Mono Microphone Interface
- Programmable ALC / Noise Gate
• On-chip 400mW BTL Speaker Driver (mono)
• On-chip Headphone Driver
- >40mW output power on 16Ω / 3.3V
- THD –80dB at 20mW, SNR 90dB with 16Ω load
- No DC blocking capacitors required (capless mode)
• Separately mixed mono output
• Digital Graphic Equaliser
• Low Power
- 7mW stereo playback (1.8V / 1.5V supplies)
- 14mW record & playback (1.8V / 1.5V supplies)
• Low Supply Voltages
- Analogue 1.8V to 3.6V
- Digital core: 1.42V to 3.6V
- Digital I/O: 1.8V to 3.6V
• 256fs / 384fs or USB master clock rates: 12MHz, 24MHz
• Audio sample rates: 8, 11.025, 16, 22.05, 24, 32, 44.1, 48,
88.2, 96kHz generated internally from master clock
• 5x5x0.9mm QFN package
APPLICATIONS
• MP3 Player / Recorder
• AAC/WMA/Multi-Format Player / Recorder
• Minidisc Player / Recorder
• Portable Digital Music Systems
WOLFSON MICROELECTRONICS plc
www.wolfsonmicro.com
Advanced Information, July 2004, Rev 3.2
Copyright 2004 Wolfson Microelectronics plc
1 page  
Advanced Information
PIN DESCRIPTION
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
NAME
MCLK
DCVDD
DBVDD
DGND
BCLK
DACDAT
DACLRC
ADCDAT
ADCLRC
MONOOUT
OUT3
ROUT1
LOUT1
HPGND
ROUT2
LOUT2
HPVDD
AVDD
AGND
VREF
VMID
MICBIAS
RINPUT3 /
HPDETECT
LINPUT3
RINPUT2
LINPUT2
RINPUT1
LINPUT1
MODE
CSB
SDIN
SCLK
TYPE
Digital Input
Supply
Supply
Supply
Digital Input / Output
Digital Input
Digital Input / Output
Digital Output
Digital Input / Output
Analogue Output
Analogue Output
Analogue Output
Analogue Output
Supply
Analogue Output
Analogue Output
Supply
Supply
Supply
Analogue Output
Analogue Output
Analogue Output
Analogue Input
Analogue Input
Analogue Input
Analogue Input
Analogue Input
Analogue Input
Digital Input
Digital Input
Digital Input/Output
Digital Input
WM8973L
DESCRIPTION
Master Clock
Digital Core Supply
Digital Buffer (I/O) Supply
Digital Ground (return path for both DCVDD and DBVDD)
Audio Interface Bit Clock
DAC Digital Audio Data
Audio Interface Left / Right Clock/Clock Out
ADC Digital Audio Data
Audio Interface Left / Right Clock
Mono Output
Analogue Output 3 (can be used as Headphone Pseudo Ground)
Right Output 1 (Line or Headphone)
Left Output 1 (Line or Headphone)
Supply for Analogue Output Drivers (LOUT1/2, ROUT1/2)
Right Output 1 (Line or Headphone or Speaker)
Left Output 1 (Line or Headphone or Speaker)
Supply for Analogue Output Drivers (LOUT1/2, ROUT1/2,
MONOUT)
Analogue Supply
Analogue Ground (return path for both AVDD and MVDD)
Reference Voltage Decoupling Capacitor
Midrail Voltage Decoupling Capacitor
Microphone Bias
Right Channel Input 3 or Headphone Plug-in Detection
Left Channel Input 3
Right Channel Input 2
Left Channel Input 2
Right Channel Input 1
Left Channel Input 1
Control Interface Selection
Chip Select / Device Address Selection
Control Interface Data Input / 2-wire Acknowledge output
Control Interface Clock Input
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AI Rev 3.2 July 2004
5
5 Page 
Advanced Information
WM8973L
POWER CONSUMPTION
The power consumption of the WM8973L depends on the following factors.
• Supply voltages: Reducing the supply voltages also reduces supply currents, and therefore results in significant power
savings, especially in the digital sections of the WM8973L.
• Operating mode: Significant power savings can be achieved by always disabling parts of the WM8973L that are not
used (e.g. mic pre-amps, unused outputs, DAC, ADC, etc.)
Control Register
R25 (19h)
R26 (1Ah)
R24 R23 Other settings
AVDD
DCVDD DBVDD HPVDD Tot. Power
Bit
V I (mA) V I (mA) V I (mA) V I (mA)
OFF
00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 11 Clocks stopped 3.3 0.0016 3.3 0.0190 3.3 0.0080 3.3 0.0002
01 2.5 0.0008 2.5 0.0170 2.5 0.0050 2.5 0.0000
00 1.8 0.0005 1.5 0.0120 1.5 0.0029 1.8 0.0000
Standby
10 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 11 Interface Stopped 3.3 0.3900 3.3 0.0390 3.3 0.0080 3.3 0.0000
(500 KOhm VMID string)
01 2.5 0.2880 2.5 0.0170 2.5 0.0050 2.5 0.0000
00 1.8 0.1970 1.5 0.0120 1.5 0.0030 1.8 0.0000
Playback to Line-out
01 1 0 0 0 0 0 1 1 0 0 1 1 0 0 0 0 11
3.3 3.7310 3.3 5.6600 3.3 0.3000 3.3 0.2370
01 2.5 2.6940 2.5 3.8600 2.5 0.2200 2.5 0.2100
00 1.8 1.8820 1.5 2.1400 1.5 0.1240 1.8 0.1500
Playback to Line-out
01 1 0 0 0 0 0 1 1 1 1 0 0 0 0 0 1 11
3.3 3.5170 3.3 4.6470 3.3 0.3000 3.3 0.9500
(64x oversampling mode)
01 2.5 2.5760 2.5 3.2030 2.5 0.2200 2.5 0.6480
00 1.8 1.7760 1.5 1.7590 1.5 0.1240 1.8 0.4130
Playback to 16 Ohm Headphone 01 1 0 0 0 0 0 1 1 1 1 0 0 0 0 0 0 11
3.3 3.7260 3.3 5.6700 3.3 0.3000 3.3 0.9530
01 2.5 2.7530 2.5 3.9250 2.5 0.2200 2.5 0.6570
00 1.8 1.8900 1.5 2.1410 1.5 0.1240 1.8 0.4150
Playback to 16 Ohm Headphone 01 1 0 0 0 0 0 1 1 1 1 0 0 0 1 0 0 11 R24, OUT3SW=00 3.3 3.7060 3.3 5.6400 3.3 0.3000 3.3 1.4040
(capless mode using OUT3)
01 2.5 2.7130 2.5 3.9000 2.5 0.2200 2.5 0.9600
00 1.8 1.8870 1.5 2.1410 1.5 0.1240 1.8 0.6140
Playback to 8 Ohm BTL Speaker 01 1 0 0 0 0 0 1 1 0 0 1 1 0 0 0 0 11 R24, ROUT2INV=1 3.3 3.8820 3.3 5.6470 3.3 0.3000 3.3 0.2830
01 2.5 2.8780 2.5 3.9390 2.5 0.2200 2.5 0.2100
00 1.8 1.9800 1.5 2.1630 1.5 0.1240 1.8 0.1510
Headphone Amp
01 1 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 11 Clocks Stopped 3.3 1.8400 3.3 0.0200 3.3 0.0080 3.3 0.9540
(line-in to 16 Ohm headphone)
01 2.5 1.3300 2.5 0.0190 2.5 0.0050 2.5 0.6400
00 1.8 0.9300 1.5 0.0130 1.5 0.0030 1.8 0.4100
Speaker Amp
01 1 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 11 Clocks Stopped 3.3 1.9780 3.3 0.0200 3.3 0.0080 3.3 0.3310
(line-in to 8 Ohm speaker)
01 R24, ROUT2INV=1 2.5 1.4300 2.5 0.0190 2.5 0.0050 2.5 0.2430
00 1.8 0.9860 1.5 0.0130 1.5 0.0030 1.8 0.1760
Phone Call
01 1 0 0 0 0 1 0 0 0 0 1 1 1 0 0 0 11 Clocks Stopped 3.3 2.5230 3.3 0.0370 3.3 0.0080 3.3 0.4420
(mono line-in to headphone,
01 2.5 1.8520 2.5 0.0190 2.5 0.0050 2.5 0.3200
mic to MONOOUT)
00 1.8 1.2900 1.5 0.0130 1.5 0.0030 1.8 0.2240
Record from Line-in
01 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 11
3.3 8.6600 3.3 6.5700 3.3 0.3330 3.3 0.0000
01 2.5 7.7100 2.5 4.2800 2.5 0.2320 2.5 0.0000
00 1.8 6.8000 1.5 2.2100 1.5 0.1350 1.8 0.0000
Record from Line-in
01 1 1 1 1 1 0 0 0 0 0 0 0 0 0 1 0 11
3.3 5.0720 3.3 5.9100 3.3 0.3390 3.3 0.0000
(64x oversampling mode)
01 2.5 4.2550 2.5 3.7500 2.5 0.2320 2.5 0.0000
00 1.8 3.5900 1.5 1.9100 1.5 0.1350 1.8 0.0000
Record from mono microphone 01 1 1 0 1 0 1 0 0 0 0 0 0 0 0 0 0 11 R32, LMICBOOST=11; 3.3 4.9330 3.3 6.5400 3.3 0.3390 3.3 0.0000
01 R23, DATSEL=01 2.5 4.2970 2.5 4.2500 2.5 0.2400 2.5 0.0000
00 1.8 3.7210 1.5 2.2200 1.5 0.1370 1.8 0.0000
Record from mono microphone 01 1 1 0 1 0 1 0 0 0 0 0 0 0 0 0 0 11 R32, LMICBOOST=11; 3.3 5.2900 3.3 6.5000 3.3 0.3220 3.3 0.0000
(differential)
01 R23, DATSEL=01; 2.5 4.5600 2.5 4.2700 2.5 0.2400 2.5 0.0000
00 R32, LINSEL=11 1.8 3.9000 1.5 2.2200 1.5 0.1380 1.8 0.0000
Stereo Record & Playback
01 1 1 1 1 1 1 1 1 0 0 1 1 0 0 0 0 11
3.3 11.927 3.3 10.870 3.3 0.3320 3.3 0.2820
01 2.5 10.112 2.5 7.3600 2.5 0.2340 2.5 0.2060
00 1.8 7.3910 1.5 4.0610 1.5 0.1320 1.8 0.1480
Stereo Record & Playback
01 1 1 1 1 1 1 1 1 0 0 1 1 0 0 1 1 11
3.3 8.1090 3.3 9.3300 3.3 0.3330 3.3 0.2820
(64x oversampling mode)
01 2.5 6.5500 2.5 6.3020 2.5 0.2340 2.5 0.2070
00 1.8 4.7000 1.5 3.3800 1.5 0.1320 1.8 0.1490
mW
0.0950
0.0570
0.0233
1.4421
0.7750
0.3771
32.7624
17.4600
7.0536
31.0662
16.6175
6.7647
35.1417
18.8875
7.5465
36.4650
19.4825
7.8993
33.3696
18.1175
7.2663
9.3126
4.9850
2.4360
7.7121
4.2425
2.1156
9.9330
5.4900
2.7492
51.3579
30.5550
15.7575
37.3593
20.5925
9.5295
38.9796
21.9675
10.2333
39.9696
22.6750
10.5570
77.2563
44.7800
19.8597
59.5782
33.2325
13.9962
Table 1 Supply Current Consumption
Notes:
1. All figures are at TA = +25oC, Slave Mode, fs = 48kHz, MCLK = 12.288 MHz (256fs), with zero signal (quiescent)
2. The power dissipated in the headphone or speaker is not included in the above table.
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AI Rev 3.2 July 2004
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet WM8973.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
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