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PDF WM8777 Data sheet ( Hoja de datos )
| Número de pieza | WM8777 | |
| Descripción | 24 BIT 192KHZ AV RECEIVER ON A CHIP | |
| Fabricantes | Wolfson Microelectronics plc | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de WM8777 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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WM8777
24-bit, 192kHz AV Receiver on-a-Chip
DESCRIPTION
FEATURES
The WM8777 is a high performance, multi-channel audio codec.
The WM8777 is ideal for surround sound processing applications
for home hi-fi, automotive and other audio visual equipment. A
S/PDIF transceiver with 4-channel input mux is included. Analogue
domain bass management processing, and front channel analogue
tone control facilities are provided.
A stereo 24-bit multi-bit sigma delta ADC is used with a six stereo
channel input selector. Each channel has analogue domain mute
and programmable gain control. Sampling rates from 8kHz to
192kHz are supported.
Four stereo 24-bit multi-bit sigma delta DACs are provided, which
may be used to support up to 7.1 channel operation. If preferred,
5.1 operation may be chosen, with the spare stereo DAC used to
support an Aux remote room. Sampling rates from 8kHz to 192kHz
are supported. Each DAC channel has independent digital volume
and mute control. A set of input multiplexors allows switching of an
external 5.1 analogue input, or bypass channel stereo analogue
input into the signal path. The front channel analogue signals may
be looped out of the chip prior to each master volume control, and
external filtering applied in order to select treble and bass filter
characteristics. Adjustment of tone controls is then achieved using
on-chip gain adjust amplifiers, addressed via the control interface.
Analogue bass management support is provided, plus analogue
stereo mixdown options.
The device is controlled via a serial interface giving access to all
features including channel selection, volume controls, tone
controls, mutes, de-emphasis and power management facilities.
The device is available in a 100-pin LQFP package.
• AV receiver on-a-chip with 8 DACs and 2 ADCs
• Integrated S/PDIF/IEC60958/AES3 transceiver
• Analogue Bass Management and stereo mixdown support
• Analogue tone controls for front 3 channels
• Master volume control on each DAC channel with gain range
of +20dB to -100dB in 1dB steps
• Audio Performance
− 108dB SNR (‘A’ weighted @ 48kHz) DAC
− 102dB SNR (‘A’ weighted @ 48kHz) ADC
− 110dB SNR (‘A’ weighted) Analogue volume control
• DAC Sampling Frequency: 8KHz – 192kHz
• ADC Sampling Frequency: 8KHz – 192kHz
• 3-Wire SPI or 2-wire MPU Serial Control Interface with
readback.
• Master or Slave Clocking Mode
• Programmable Format Audio Data Interface Modes
• Four Independent stereo DAC outputs with independent
digital volume controls
• Integrated Stereo headphone amplifier with source select
• 5.1 channel analogue input prior to the tone controls, bass
management and stereo mixdown functions.
• Six stereo input ADC mux with analogue gain adjust from
+24dB to –21dB in 0.5dB steps
• 5V Analogue, 2.7V to 3.6V Digital supply Operation
APPLICATIONS
• Surround Sound AV Processors and Hi-Fi systems
WOLFSON MICROELECTRONICS plc
www.wolfsonmicro.com
Product Preview, November 2004, Rev 1.94
Copyright 2004 Wolfson Microelectronics plc
1 page  
Product Preview
PIN NAME
51 RRBMIN
52 RSURSOP
53 SURR
54 LRBMIN
55 LSURSOP
56 SURL
57 AUX3R
58 AUX3L
59 LFE
60 LFEVE
61 LFESUM
62 LFESOP
63 AVDDDAC
64 AGNDDAC
65 HPHONER
66 HPHONEL
67 AUX2R
68 AUX2L
69 CNTR
70 CNTSOP
71 CIN3
72 CIN2
73 CIN1
74 FRONTR
75 RIN3
76 RIN2
77 RIN1
78 RSUMOP
79 FRONTL
80 LIN3
81 LIN2
82 LIN1
83 LSUMOP
84 AUX1R
85 AUX1L
86 VMIDDAC2
87 DACREFN2
88 DACREFP2
89 GPIO1
90 GPIO2
91 GPIO3
92 GPO/MODE
93 SPIN
94 SPDIFOP
95 SPBCLK
96 SLRC
97 SDATAOP
98 SDATAIP
99 XTO
100 XTI
WM8777
TYPE
Analogue input
Analogue output
Analogue output
Analogue input
Analogue output
Analogue output
Analogue input
Analogue input
Analogue output
Analogue Input
Analogue output
Analogue output
Supply
Supply
Analogue output
Analogue output
Analogue input
Analogue input
Analogue output
Analogue output
Analogue input
Analogue input
Analogue input
Analogue output
Analogue input
Analogue input
Analogue input
Analogue output
Analogue output
Analogue input
Analogue input
Analogue input
Analogue output
Analogue input
Analogue input
Analogue output
Supply
Supply
Digital input/output
Digital input/output
Digital input/output
Digital input/output
Digital input
Digital output
Digital input/output
Digital input/output
Digital output
Digital Input
Crystal op
Digital input
DESCRIPTION
Right surround channel bass managed filtered input
Right surround channel summer output
DAC surround channel right output
Left surround channel bass managed filtered input
Left surround channel summer output
DAC surround channel left output
3.1 Multiplexor channel 3 right virtual ground input
3.1 Multiplexor channel 3 left virtual ground input
DAC LFE channel right output
LFE channel summer virtual earth
LFE channel summer output
LFE channel summer output
Analogue positive supply for DAC
Analogue negative supply and substrate connection for DAC
Headphone channel right output
headphone channel left output
3.1 Multiplexor channel 2 right virtual ground input
3.1 Multiplexor channel 2 left virtual ground input
DAC centre channel right output
Centre front channel summer output
Centre channel bass management filter input
Centre channel bass filter input
Centre channel treble filter input
DAC front channel right output
Right front channel bass management filter input
Right front channel bass filter input
Right front channel treble filter input
Right front channel summer output
DAC front channel left output
Left front channel bass management filter input
Left front channel bass filter input
Left front channel treble filter input
Left front channel summer output
3.1 Multiplexor channel 1 right virtual ground input
3.1 Multiplexor channel 1 left virtual ground input
DAC midrail decoupling pin ; 10uF external decoupling
DAC ground reference
DAC positive reference supply
Selectable i/o (S/PDIF input, status flag output or ADCMCLK)
Selectable i/o (S/PDIF input, status flag output, or PDATAOPBCLK)
Selectable i/o (S/PDIF input or status flag output)
Selectable i/o (state at RESET determines control interface type)
S/PDIF input
S/PDIF output
Secondary Audio Interface bit clock
Secondary Audio Interface left/right clock
Secondary Audio Interface output data
Secondary Audio Interface input data
Crystal oscillator output
Crystal oscillator or external clock inputs
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PP Rev 1.94 November 2004
5
5 Page 
Product Preview
WM8777
SUPPLY CURRENT
The supply current of the WM877 depends on the operating mode. For example, the supply current
is lower when the device is used for playback-only (ADC off) or recording-only (DACs off). The supply
currents for various operating modes are shown in Table 1 below.
MODE DESCRIPTION
AVDDDAC
On power-up, no clks applied
On power-up, clks applied
2.81
2.81
ADC
2.71
All DACs
ADC, All DACs
ADC, All DACs, Osc
55.35
53.45
53.44
ADC, All DACs, Osc, PLL
ADC, All DACs, Osc, PLL, S/PDIF
ADC, All DACs, Osc, PLL, S/PDIF, Tone
ADC, All DACs, Osc, PLL, S/PDIF, Tone,
HP (16 Ohm)
53.38
53.38
87.53
146.60
Power-down, no clks applied
Power-down, clks applied
Software RESET
0.028
0.028
2.80
Table 1 Supply Current for Functional Blocks
Notes:
1. DAC Analogue supply (AVDDDAC) = 5V.
2. ADC Analogue supply (AVDDADC) = 5V.
3. PLL Analogue supply (PVDD) = 5V.
4. Digital supply (DVDD) = 3.3V.
SUPPLY CURRENT
AVDDADC PVDD DVDD
1.89
0.30 0.39
1.89
0.30 1.70
38.86
0.30 5.80
1.90
0.30 18.61
38.69
0.30 22.4
38.70
1.12 22.4
38.62
3.74 28.65
38.62
3.43 29.89
38.53
3.43 29.99
38.42
3.44 29.99
TOTAL
5.39
6.70
47.67
76.16
114.84
115.66
124.39
125.32
159.48
218.45
0.172
0.172
1.88
0.30
0.30
0.3
0.39
1.60
0.95
0.89
2.10
5.93
UNIT
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
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PP Rev 1.94 November 2004
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet WM8777.PDF ] | |
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