PCM3794A Datasheet PDF - Burr-Brown
| Part Number | PCM3794A | |
| Description | (PCM3793A / PCM3794A) Low-Power Stereo Audio CODEC | |
| Manufacturers | Burr-Brown | |
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BurrĆBrown Products
from Texas Instruments
PCM3793A
PCM3794A
SLAS529A – JANUARY 2007 – REVISED FEBRUARY 2007
16-Bit, Low-Power Stereo Audio CODEC With Microphone Bias, Headphone, and Digital
Speaker Amplifier
FEATURES
• 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 Ω
– 700-mW + 700-mW Speaker Output at
RL = 8 Ω
• 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 µW 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
APPLICATIONS
• Portable Audio Player, Cellular Phone
• Video Camcorder, Digital Movie/Still Camera
• PMP/DMB
DESCRIPTION
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.
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
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www.ti.com
PCM3793A
PCM3794A
SLAS529A – JANUARY 2007 – REVISED FEBRUARY 2007
ELECTRICAL CHARACTERISTICS (continued)
All specifications at TA = 25°C, VDD = VIO = VCC = VPA = 3.3 V, fS = 48 kHz, system clock = 256 fS, and 16-bit data (unless
otherwise noted).
PARAMETER
TEST CONDITIONS
PCM3793ARHB, PCM3794ARHB
MIN TYP MAX
Line Input to Digital Output Through ADC (AIN1L/R, AIN2L/R, AIN3L, and AIN3L/R)
ALC = OFF, microphone boost = 0 dB, PGA = 0 dB, speaker and headphone = powered down, analog mixing = disabled
DYNAMIC PERFORMANCE
Full-scale input voltage
0 dB
2.828
1
Dynamic range
EIAJ, A-weighted
90
SNR Signal-to-noise ratio
EIAJ, A-weighted
83 90
Channel separation
87
THD+N Total harmonic distortion + noise –1 dB
0.009%
ANALOG INPUT
Center voltage
Input impedance
0.5 VCC
10 20
Microphone Bias
ALC = OFF, microphone boost = 0 dB, PGA = 0 dB, speaker and headphone = powered down, analog mixing = disabled
Bias voltage
Bias source current
0.75 VCC
2
Output noise
6.5
Filter Characteristics
INTERPOLATION FILTER FOR DAC
Pass band
Stop band
Pass-band ripple
0.546 fS
0.454 fS
±0.04
Stop-band attenuation
–50
Group delay
De-emphasis error
19/fs
±0.1
ANALOG FILTER FOR DAC
Frequency response
f = 20 kHz
±0.2
DECIMATION FILTER FOR ADC
Pass band
Stop band
Pass-band ripple
0.591 fS
0.408 fS
±0.02
Stop-band attenuation
Group delay
HIGH-PASS FILTER FOR ADC
f < 3.268 fS
–60
17/fS
Frequency response
–3 dB, fc = 4 Hz
–0.5 dB, fc = 4 Hz
–0.1 dB, fc = 4 Hz
–3 dB, fc = 240 Hz
–0.5 dB, fc = 240 Hz
–0.1 dB, fc = 240 Hz
3.74
10.66
24.2
235.68
609.95
2601.2
UNIT
Vp-p
Vrms
dB
dB
dB
V
kΩ
V
mA
µV
dB
dB
s
dB
dB
dB
dB
s
Hz
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for PCM3794A electronic component. |
| Information | Total 68 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ PCM3794A.PDF Datasheet ] | |
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