PCM1870_16 Datasheet, PDF (1/54 Pages) Texas Instruments – Microphone Bias and Microphone Amplifier

BurrĆBrown Products
from Texas Instruments
PCM1870
SLAS544A – MAY 2007 – REVISED SEPTEMBER 2007
16-Bit Low-Power Stereo Audio ADC With Microphone Bias and Microphone Amplifier
FEATURES
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• Analog Front End:
– Stereo Single End Input With MUX
– Mono Differential Input
– Stereo Programmable Gain Amplifier
– Microphone Boost Amplifier and Bias
• Analog Performances Dynamic Range: 90 dB
• 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
• Low Power Dissipation:
– 13 mW in Record, 1.8/2.4 V, 48 kHz, Stereo
– 5.3 mW in Record, 1.8/2.4 V, 8 kHz, Mono
– 3.3 μW in All Power Down
• Sampling Frequency: 5 kHz to 50 kHz
• Auto Level Control for Recording
• Operation by Single Clock Input Without PLL
• System Clock: Common Audio Clock
(256 f_S/384 f_S), 12/24, 13/26, 13.5/27, 19.2/38.4,
19.68/39.36 MHz
• 2 (I²C) or 3 (SPI) Wire Serial Control
• Programmable Function by Register Control:
– Digital Soft Mute
– Power Up/Down Control for Each Module
– 30-dB to –12-dB Gain for Analog Inputs
– 0/12/20-dB Boost for Microphone Input
– Parameter Settings for ALC
– Three-Band Tone Control and 3D Sound
– High-Pass Filter and Two-Stage Notch Filter
• Pop Noise Reduction Circuit
• Package:
– 24-QFN (4 mm × 5 mm)
– 24-DSBGA (2.49 mm × 3.49 mm)
• Operation Temperature Range: –40°C to 85°C
APPLICATIONS
• Portable Audio Player, Cellular Phone
• Video Camcorder, Movie Digital Still Camera
• PMP/DMB, Voice Recorder
DESCRIPTION
The PCM1870 is a low-power stereo ADC designed
for portable digital audio applications, with line-input
amplifier, boost amplifier, microphone bias,
programmable gain control, sound effects, and auto
level control (ALC). It is available in 24-QFN (4-mm ×
5-mm) and 24-DSBGA (2.49-mm × 3.49-mm)
packages to save footprint. The PCM1870 accepts
right-justified, left-justified, I²S, and DSP formats,
providing easy interfacing to audio DSP and encoder
chips. Sampling rates up to 50 kHz are supported.
The user-programmable functions are accessible
through a 2- or 3-wire serial control port.
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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