参数资料
型号: W681513SG
厂商: WINBOND ELECTRONICS CORP
元件分类: 编解码器
英文描述: A/MU-LAW, PCM CODEC, PDSO20
封装: 0.300 INCH, ROHS COMPLIANT, SOP-20
文件页数: 12/35页
文件大小: 347K
代理商: W681513SG
W681513
- 2 -
1. GENERAL DESCRIPTION
The
W681513 is a single channel PCM CODEC with pin-selectable μ-Law or A-Law companding
dedicated to the USB accessory market by supporting a derivative 2MHz clock. The device is
compliant with the ITU G.712 specification. It operates from a single +5V power supply and is
available in 20-pin SOP package option. Functions performed include digitization and reconstruction
of voice signals, and band limiting and smoothing filters required for PCM systems. The filters are
compliant with ITU G.712 specification.
W681513 performance is specified over the industrial
temperature range of –40
°C to +85°C.
The
W681513 includes an on-chip precision voltage reference and an additional power amplifier,
capable of driving 300
Ω loads differentially up to a level of 6.3V peak-to-peak. The analog section is
fully differential, reducing noise and improving the power supply rejection ratio. The data transfer
protocol supports both long-frame and short-frame synchronous communications for PCM
applications, and IDL and GCI communications for ISDN applications.
W681513 accepts 2MHz
master clock rate, and an on-chip pre-scaler automatically determines the division ratio for the
required internal clock.
2. FEATURES
Single +5V power supply
Typical power dissipation of 30 mW,
power-down mode of 0.5
μW
Fully-differential analog circuit design
On-chip precision reference of 1.575 V for
a 0 dBm TLP at 600
Ω (775mVRMS)
Push-pull power amplifiers with external
gain adjustment with 300
Ω load capability
Master clock rate supports 2.000MHz
clock for USB applications
Pin-selectable
μ-Law
and
A-Law
companding (compliant with ITU G.711)
CODEC A/D and D/A filtering compliant
with ITU G.712
Industrial temperature range (–40
°C to
+85
°C)
Package: 20-pin SOP (SOG)
Pb-Free / RoHS package option available
Applications
Soft phones running on a PC (VoInternet):
o
USB Phones
o
USB to PSTN Gateway
USB Microphones
USB Headset for PC and Game Consoles
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