Burr Brown Products
from Texas Instruments
PCM1770
PCM1771
SLES011C – SEPTEMBER 2001 – REVISED MAY 2004
LOW VOLTAGE AND LOW POWER STEREO AUDIO
DIGITAL TO ANALOG CONVERTER WITH HEADPHONE AMPLIFIER
FEATURES
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Multilevel DAC Including Headphone
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Amplifier
Analog Performance (V
CC
, V
HP
= 2.4 V):
− Dynamic Range: 98 dB Typ
− THD+N at 0 dB: 0.1% Typ
− THD+N at −20 dB: 0.04% Typ
− Output Power at R
L
= 16
Ω:
13 mW
(Stereo), 26 mW (Monaural)
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Pop-Noise-Free Circuit
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3.3-V Tolerant
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Packages: TSSOP-16 and VQFN-20, Lead Free
APPLICATIONS
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Portable Audio Player
D
Cellular Phone
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PDA
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Other Applications Requiring Low-Voltage
Operation
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1.6-V to 3.6-V Single Power Supply
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Low Power Dissipation: 6.5 mW at V
CC
,
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D
D
V
HP
= 2.4 V
System Clock: 128 f
S
, 192 f
S
, 256 f
S
, 384 f
S
Sampling Frequency: 5 kHz to 50 kHz
Software Control (PCM1770):
− 16-, 20-, 24-Bit Word Available
− Left-, Right-Justified, and I
2
S
− Slave/Master Selectable
− Digital Attenuation: 0 dB to
–62
dB,
1 dB/Step
− 44.1-kHz Digital De-Emphasis
− Zero Cross Attenuation
− Digital Soft Mute
− Monaural Analog-In With Mixing
− Monaural Speaker Mode
Hardware Control (PCM1771):
− Left-Justified and I
2
S
− 44.1-kHz Digital De-Emphasis
− Monaural Analog-In With Mixing
DESCRIPTION
The PCM1770 and PCM1771 devices are CMOS,
monolithic, integrated circuits which include stereo
digital-to-analog converters, headphone circuitry, and
support circuitry in small TSSOP-16 and VQFN-20
packages.
The data converters use TI’s enhanced multilevel
∆-Σ
architecture, which employs noise shaping and
multilevel amplitude quantization to achieve excellent
dynamic performance and improved tolerance to clock
jitter. The PCM1770 and PCM1771 devices accept
several industry standard audio data formats with 16- to
24-bit data, left-justified, I
2
S, etc., providing easy
interfacing to audio DSP and decoder devices.
Sampling rates up to 50 kHz are supported. A full set of
user-programmable functions are accessible through a
3-wire serial control port, which supports register write
functions.
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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 Texas Instruments standard warranty.
Production processing does not necessarily include testing of all parameters.
Copyright
2004, Texas Instruments Incorporated
TI [ TEXAS INSTRUMENTS ]
