W681310 Datasheet, PDF (2/36 Pages) Winbond – 3V SINGLE-CHANNEL VOICEBAND CODEC

W681310
1. GENERAL DESCRIPTION
The W681310 is a general-purpose single channel PCM CODEC with pin-selectable μ-Law or A-Law
companding. The device is compliant with the ITU G.712 specification. It operates from a single +3V
power supply and is available in 20-pin SOG, SSOP and TSSOP package options. Functions
performed include digitization and reconstruction of voice signals, and band limiting and smoothing
filters required for PCM systems. W681310 performance is specified over the industrial temperature
range of –40°C to +85°C.
The W681310 includes an on-chip precision voltage reference and an additional power amplifier,
capable of driving 300Ω loads differentially up to a level of 3.544V 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. W681310 accepts eight master
clock rates between 256 kHz and 4.800 MHz, and an on-chip pre-scaler automatically determines the
division ratio for the required internal clock.
For fast evaluation and prototyping purposes, the W681310DK development kit is available.
2. FEATURES
• Single +3V power supply (2.7V to 5.25V)
• Typical power dissipation of 10 mW,
power-down mode of 0.5 μW
• Fully-differential analog circuit design
• On-chip precision reference of 0.886 V for
a -5 dBm TLP at 600 Ω
• Push-pull power amplifiers with external
gain adjustment with 300 Ω load capability
• Eight master clock rates of 256 kHz to
4.800 MHz
• 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)
• Packages: 20-pin SOG (SOP), SSOP and
TSSOP
• Pb-Free package options available
• ApplIcations
• VoIP, Voice over Networks
• Digital telephone and communication
systems
• Wireless voice devices
• PABX/SOHO systems
• Local loop card
• SOHO routers
• Fiber-to-curb equipment
• Enterprise phones
• ISDN equipment
• Modems/PC cards
• Digital Voice Recorders
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