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PCM3793
PCM3794
SLES193A–AUGUST 2006–REVISED SEPTEMBER 2006
16-Bit, Low-Power Stereo Audio CODEC With Microphone Bias, Headphone, and Digital
Speaker Amplifier
FEATURES
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Headphone Plug Insert Detection
2 (I2C) or 3 (SPI) Wire Serial Control
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Analog Front End:
– Stereo Single-Ended Input With Multiplexer
– Mono Differential Input
Programmable Function by Register Control:
– Digital Attenuation of DAC: 0 dB to –62 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
– Stereo Programmable Gain Amplifier
– Microphone Boost Amplifier (20 dB) and
Bias
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Analog BackEnd:
– 0/20 dB Boost Selectable for Microphone
Input
– Stereo/Mono Line Output With Volume
– Stereo/Mono Headphone Amplifier With
Volume and Capless Mode
– 0-dB to –21-dB Gain for Analog Mixing
– Parameter Settings for ALC
– Stereo/Mono Digital Speaker Amplifier
(BTL) With Volume (PCM3793)
– Three-Band Tone Control and 3D Sound
– High-Pass Filter and Two-Stage Notch Filter
– Analog Mixing
Analog Performance:
– Dynamic Range: 93 dB (DAC)
– Dynamic Range: 90 dB (ADC)
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Pop-Noise Reduction Circuit
Short and Thermal Protection Circuit
Package: 5-mm × 5-mm QFN Pacakge
Operation Temperature Range: –40°C to 85°C
– 40-mW + 40-mW Headphone Output at
RL = 16 Ω
– 700-mW + 700-mW Speaker Output at
RL = 8 Ω
APPLICATIONS
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Power Supply Voltage
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Portable Audio Player, Cellular Phone
Video Camcorder, Digital Still Camera
PMP/DMB
– 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:
DESCRIPTION
The PCM3793/94 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 PCM3793/94
accepts right-justified, left-justified, I2S, and DSP
formats, providing easy interfacing to audio DSP,
decoder, and 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.
– 7 mW in Playback, 1.8 V/2.4 V, 48 kHz
– 13 mW in Record, 1.8 V/2.4 V, 48 kHz
– 30 µW in Power Down
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Sampling Frequency: 5 kHz to 50 kHz
Automatic Level Control for Recording
Operation From a Single Clock Input Without
PLL
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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
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2006, Texas Instruments Incorporated