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PCM3793A
PCM3794A
SLAS529A–JANUARY 2007–REVISED FEBRUARY 2007
16-Bit, Low-Power Stereo Audio CODEC With Microphone Bias, Headphone, and Digital
Speaker Amplifier
FEATURES
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2 (I2C) or 3 (SPI) Wire Serial Control
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Analog Front End:
Programmable Function by Register Control:
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Stereo Single-Ended Input With Multiplexer
Mono Differential Input
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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
Stereo Programmable Gain Amplifier
Microphone Amplifier (20 dB) and Bias
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Analog Back End:
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Stereo/Mono Line Output With Volume
Stereo/Mono Headphone Amplifier With
Volume and Capless Mode
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Stereo/Mono Digital Speaker Amplifier
(BTL) With Volume
Three-Band Tone Control and 3D Sound
High-Pass Filter: 4-, 120-, 240-Hz
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Analog Performance:
Two-Stage Programmable Notch Filter
Analog Mixing Control
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Dynamic Range: 93 dB (DAC)
Dynamic Range: 90 dB (ADC)
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Pop-Noise Reduction Circuit
40-mW + 40-mW Headphone Output at
RL = 16 Ω
Short and Thermal Protection Circuit
Package: 5-mm × 5-mm QFN Pacakge
Operation Temperature Range: –40°C to 85°C
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700-mW + 700-mW Speaker Output at
RL = 8 Ω
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Power Supply Voltage
APPLICATIONS
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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
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Portable Audio Player, Cellular Phone
Video Camcorder, Digital Movie/Still Camera
PMP/DMB
2.4 V to 3.6 V for Power Amplifier Section
DESCRIPTION
Low Power Dissipation:
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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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 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:
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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
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 © 2007, Texas Instruments Incorporated