· Analog Front End:
– Stereo Single-Ended Input With Multiplexer
– Mono Differential Input
– Stereo Programmable Gain Amplifier
– Microphone Amplifier (20 dB) and Bias
· Analog Back End:
– Stereo/Mono Line Output With Volume
– Stereo/Mono Headphone Amplifier With
Volume and Capless Mode
– Stereo/Mono Digital Speaker Amplifier
(BTL) With Volume
· Analog Performance:
– Dynamic Range: 93 dB (DAC)
– Dynamic Range: 90 dB (ADC)
– 40-mW + 40-mW Headphone Output at RL = 16 W
– 700-mW + 700-mW Speaker Output at RL = 8 W
· Power Supply Voltage
– 1.71 V to 3.6 V for Digital I/O Section
– 1.71 V to 3.6 V for Digital Core Section
– 2.4 V to 3.6 V for Analog Section
– 2.4 V to 3.6 V for Power Amplifier Section
· Low Power Dissipation:
– 7 mW in Playback, 1.8 V/2.4 V, 48 kHz
– 13 mW in Record, 1.8 V/2.4 V, 48 kHz
– 3.3 mW in Power Down
· Sampling Frequency: 5 kHz to 50 kHz
· Automatic Level Control for Recording
· Operation From a Single Clock Input Without PLL
· System Clock:
– Common-Audio Clock (256 fS/384 fS), 12/24, 13/26, 13.5/27, 19.2/38.4, 19.68/39.36 MHz
· Headphone Plug Insert Detection
· 2 (I2C) or 3 (SPI) Wire Serial Control
· Programmable Function by Register Control:
– Digital Attenuation of DAC: 0 dB to –62 dB
– Digital Gain of DAC: 0, 6, 12, 18 dB
– Power Up/Down Control for Each Module
– 6-dB to –70-dB Gain for Analog Outputs
– 30-dB to –12-dB Gain for Analog Inputs
– 0/20 dB Selectable for Microphone Input
– 0-dB to –21-dB Gain for Analog Mixing
– Parameter Settings for ALC
– Three-Band Tone Control and 3D Sound
– High-Pass Filter: 4-, 120-, 240-Hz
– Two-Stage Programmable Notch Filter
– Analog Mixing Control
· Pop-Noise Reduction Circuit
· Short and Thermal Protection Circuit
· Package: 5-mm ´ 5-mm QFN Pacakge
· Operation Temperature Range: –40°C to 85°C

· Portable Audio Player, Cellular Phone
· Video Camcorder, Digital Movie/Still Camera

The PCM3793A/94A is a low-power stereo CODEC designed for portable digital audio applications. The device integrates stereo digital speaker amplifier, headphone amplifier, line amplifier, line input, boost amplifier, microphone bias, programmable gain control, analog mixing, sound effects, and automatic level control (ALC). It is available in a small-footprint,
5-mm ´ 5-mm QFN package.

 The PCM3793A/94A supports right-justified, left-justified, I2S, and DSP formats, providing easy interfacing to audio DSP and decoder/encoder chips. Sampling rates up to 50 kHz are supported. The user-programmable functions are accessible through a two- or three-wire serial control port.


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 The WM9714L is a highly integrated input/output device designed for mobile computing and communications. The chip is architected for dual CODEC operation, supporting Hi-Fi stereo Codec functions via the AC link interface, and additionally supporting voice Codec functions via a PCM type Synchronous Serial Port (SSP). A third, auxiliary DAC is provided which may be used to support generation of supervisory tones, or ring-tones at different sample rates to the
main codec.

 The device can connect directly to mono or stereo microphones, stereo headphones and a stereo speaker, reducing total component count in the system. Cap-less connections to the headphones, speakers, and earpiece may be used, saving cost and board area. Additionally, multiple analog input and output pins are provided for seamless integration with analog connected wireless communication devices.

 All device functions are accessed and controlled through a single AC-Link interface compliant with the AC’97 standard. The 24.576 MHz masterclock can be input directly or generated internally from a 13MHz (or other frequency) clock by an on-chip PLL. The PLL supports a wide range of input clock from 2.048MHz to 78.6MHz.

 The WM9714L operates at supply voltages from 1.8V to 3.6V. Each section of the chip can be powered down under software control to save power. The device is available in a small
leadless 7x7mm QFN package, ideal for use in hand-held portable systems.

• AC’97 Rev 2.2 compatible stereo codec
- DAC SNR 94dB, THD –85dB
- ADC SNR 87dB, THD –86dB
- Variable Rate Audio, supports all WinCE sample rates
- Tone Control, Bass Boost and 3D Enhancement
• On-chip 45mW headphone driver
• On-chip 400mW mono or stereo speaker drivers
• Stereo, mono or differential microphone input
- Automatic Level Control (ALC)
- Mic insert and mic button press detection
• Auxiliary mono DAC (ring tone or DC level generation)
• Seamless interface to wireless chipset
• Additional PCM/I2S interface to support voice CODEC
• PLL derived audio clocks.
• Supports input clock ranging from 2.048MHz to 78.6MHz
• 1.8V to 3.6V supplies (digital down to 1.62V, speaker up to 4.2V)
• 7x7mm 48-lead QFN package

• Personal Digital Assistants (PDA) with or without phone
• Smartphones
• Handheld and Tablet Computers



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