|
|
PDF STAC9750 Data sheet ( Hoja de datos )
| Número de pieza | STAC9750 | |
| Descripción | (STAC9750 / STAC9751) VALUE-LINE TWO-CHANNEL AC97 CODECS | |
| Fabricantes | IDT | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de STAC9750 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
|
No Preview Available !
www.DataSheet4U.com
VALUE-LINE TWO-CHANNEL AC’97 CODECS
DATASHEET
STAC9750/9751
OVERVIEW
Value-Line Stereo AC'97 CODECs with headphone drive
and SPDIF outputs.
FEATURES
• Full Duplex Stereo 18-bit ADCs and 20-bit DACs
• AC’97 Rev 2.2 Compliant
• High Performance Σ∆ Technology
• SPDIF Output
• Crystal Elimination Circuit
• Headphone amplifier
• Independent Sample Rates for ADCs & DACs
(hardware SRCs)
• 20dB or 30dB Microphone Boost Capability
• 90dB SNR LINE-LINE
• 5-Wire AC-Link Protocol Compliance
• Digital-Ready Architecture
• General Purpose I/O
• +3.3 V (STAC9751) and +5 V (STAC9750) Analog
Power Supply Options
• Pin Compatible With STAC9700/21/56/66
• IDT Surround (SS3D) Stereo Enhancement
• Energy Saving Dynamic Power Modes
KEY SPECIFICATIONS
• Analog LINE_OUT SNR: 90dB
• Digital DAC SNR: 89dB
• Digital ADC SNR: 85dB
• Full-scale Total Harmonic Distortion: 0.005%
• Crosstalk between Input Channels: -70dB
• Spurious Tone Rejection: 100dB
RELATED MATERIALS
• Data Sheet
• Reference Designs for MB, CNR, ACR and PCI
applications
• Audio Precision Performance Plots
DESCRIPTION
IDT's STAC9750/9751 are general purpose, full duplex,
audio CODECs conforming to the analog component spec-
ification of AC'97 (Audio CODEC 97 Component Specifica-
tion Rev. 2.2). They have 18-bit ADCs and 20-bit DACs.
The STAC9750/9751 incorporate IDT's proprietary Σ∆ tech-
nology to achieve a DAC SNR in excess of 89dB.
The DACs, ADCs and mixer are integrated with analog I/
Os, which include four analog line-level stereo inputs, two
analog line-level mono inputs, two stereo outputs, and one
mono output channel.
The STAC9750/9751 include digital input/output capability
for support of modern PC systems and also an output that
supports the SPDIF format.
The STAC9750/9751 is a standard 2-channel stereo
CODEC. With IDT’s headphone drive capability, head-
phones can be driven with no external amplifier.
The STAC9750/9751 may be used as a secondary
CODEC, with the STAC9700/21/44/56/08/84/66 as the pri-
mary, in a multiple CODEC configuration conforming to the
AC'97 Rev. 2.2 specification. This configuration can provide
the true six-channel, AC-3 playback required for DVD appli-
cations.
The STAC9750/9751 communicates via the five-wire
AC-Link to any digital component of AC'97, providing flexi-
bility in the audio system design.
The STAC9750/9751 supports General Purpose Input/Out-
put (GPIO), as well as SPDIF output. These digital I/O
options provide for a number of advanced architectural
implementations, with volume controls and digital mixing
capabilities built directly into the CODEC.
Packaged in an AC'97 compliant 48-pin TQFP, the
STAC9750/9751 can be placed on the motherboard,
daughter boards, PCI, AMR, CNR, or ACR cards.
IDT™
VALUE-LINE TWO-CHANNEL AC’97 CODECS
1
STAC9750/9751
V 5.8 103106
1 page  
STAC9750/9751
VALUE-LINE TWO-CHANNEL AC’97 CODECS
PC AUDIO
1. PRODUCT BRIEF
1.1.
Features
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Full duplex stereo 18-bit ADC and 20-bit DAC
AC’97 Rev 2.2-compliant
High performance Σ∆ technology
SPDIF output
Crystal elimination circuit
Headphone amplifier
Independent sample rates for ADCs & DACs (hardware SRCs)
20dB or 30dB microphone boost capability
90dB SNR LINE-LINE
5-Wire AC-Link protocol compliance
Digital-Ready architecture
General Purpose I/O
+3.3 V (STAC9751) and +5 V (STAC9750) analog power supply options
Pin compatible with the STAC9700/21/44/08/56/66/52
IDT Surround (SS3D) Stereo Enhancement
Energy saving dynamic power modes
1.2. Description
IDT's STAC9750/9751 are general purpose 18-bit ADC, 20-bit DAC, full duplex, audio CODECs con-
forming to the analog component specification of AC'97 (Audio Codec ‘97 Component Specification
Rev. 2.2). The STAC9750/9751 incorporate IDT's proprietary Σ∆ technology to achieve a DAC SNR
in excess of 90 dB. The DACs, ADCs, and mixer are integrated with analog I/Os, which include four
analog line-level stereo inputs, two analog line-level mono inputs, two stereo outputs, and one mono
output channel. The STAC9750/9751 include digital input/output capability for support of modern PC
systems with an output that supports the SPDIF format. The STAC9750/9751 is a standard 2-chan-
nel stereo CODEC. With IDT’s headphone drive capability, headphones can be driven with no exter-
nal amplifier. The STAC9750/9751 may be used as a secondary CODEC, with the STAC9700/21/44/
56/08/84/66 as the primary, in a multiple CODEC configuration conforming to the AC'97 Rev. 2.2
specification. This configuration can provide the true six-channel, AC-3 playback required for DVD
applications. The STAC9750/9751 communicates via the five-wire AC-Link to any digital component
of AC'97, providing flexibility in the audio system design. Packaged in an AC'97 compliant 48-pin
LQFP, the STAC9750/9751 can be placed on a motherboard, daughter boards, PCI, AMR, CNR, or
ACR cards.
The STAC9750/9751 block diagram is illustrated in Figure 1. It provides variable sample rate Digi-
tal-to-Analog (DA) and Analog-to-Digital (AD) conversion, mixing, and analog processing. Supported
audio sample rates include 48 KHz, 44.1 KHz, 32 KHz, 22.05 KHz, 16 KHz, 11.025 KHz, and 8 KHz;
additional rates are supported in the STAC9750/9751 soft audio drivers. The digital interface com-
municates with the AC'97 controller via the five-wire AC-Link and contains the 64-word by 16-bit reg-
IDT™
VALUE-LINE TWO-CHANNEL AC’97 CODECS
5
STAC9750/9751
V 5.8 103106
5 Page 
STAC9750/9751
VALUE-LINE TWO-CHANNEL AC’97 CODECS
PC AUDIO
2.1.6.
STAC9750 Analog Performance Characteristics
(Tambient = 25 ºC, AVdd = 5.0 V ± 5%, DVdd = 3.3 V ± 5%, AVss=DVss=0 V; 1 KHz input sine wave;
Sample Frequency = 48 KHz; 0dB = 1 Vrms, 10 KΩ / 50 pF load, Testbench Characterization BW:
20 Hz – 20 KHz, 0dB settings on all gain stages)
Parameter
Full Scale Input Voltage:
All Analog Inputs except Microphone
Microphone Inputs (Note 1)
Full Scale Output:
Line Output
PCM (DAC) to LINE_OUT
MONO_OUT
HEADPHONE_OUT (32 Ω load) (peak)
Analog S/N: (Note 2)
CD to LINE_OUT
Other to LINE_OUT
D/A to LINE_OUT
LINE_IN to A/D with High pass filter enabled
Analog Frequency Response (Note 3)
Total Harmonic Distortion: (Note 4)
CD to LINE_OUT
Other to LINE_OUT
D/A to LINE_OUT (full scale)
LINE_IN to A/D with High pass filter enabled
HEADPHONE_OUT
A/D & D/A Digital Filter Pass Band (Note 5)
A/D & D/A Digital Filter Transition Band
A/D & D/A Digital Filter Stop Band
A/D & D/A Digital Filter Stop Band Rejection (Note 6)
DAC Out-of-Band Rejection (Note 7)
Group Delay (48KHz sample rate)
Any Analog Input to LINE_OUT Crosstalk (10 KHz Signal Frequency)
Any Analog Input to LINE_OUT Crosstalk (1 KHz Signal Frequency)
Spurious Tone Rejection
Attenuation, Gain Step Size
Input Impedance (Note 8)
Input Capacitance
VREF_OUT
Min
-
-
-
-
-
-
-
-
-
-
20
-
-
-
84
74
20
19,200
28,800
100
55
-
-
-
-
-
-
-
-
Typ
1.0
0.03
1.0
1.0
1.0
50
90
90
89
85
-
89
89
89
-
80
-
-
-
-
-
70
100
100
1.5
50
15
0.5 X AVdd
Max
Unit
- Vrms
- Vrms
- Vrms
Vrms
- Vrms
- mW
-
-
-
-
20,000
dB
dB
dB
dB
Hz
-
-
-
-
-
19,200
28,800
-
-
-
1
-
-
-
-
-
-
-
dB
dB
dB
dB
dB
Hz
Hz
Hz
dB
dB
ms
dB
dB
dB
dB
KΩ
pF
V
IDT™
VALUE-LINE TWO-CHANNEL AC’97 CODECS
11
STAC9750/9751
V 5.8 103106
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet STAC9750.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| STAC9750 | (STAC9750 / STAC9751) VALUE-LINE TWO-CHANNEL AC97 CODECS | IDT |
| STAC9751 | (STAC9750 / STAC9751) VALUE-LINE TWO-CHANNEL AC97 CODECS | IDT |
| STAC9752 | (STAC9752 / STAC9753) TWO-CHANNEL AC97 2.3 CODECS | IDT |
| STAC9752A | (STAC9752A / STAC9753A) AC97 2.3 CODECS | IDT |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |