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The TLV320AIC23 is a high-performance stereo audio codec with highly integrated analog functionality. The
analog-to-digital converters (ADCs) and digital-to-analog converters (DACs) within the TLV320AIC23 use multibit
sigma-delta technology with integrated oversampling digital interpolation filters. Data-transfer word lengths of 16, 20,
24, and 32 bits, with sample rates from 8 kHz to 96 kHz, are supported. The ADC sigma-delta modulator features
third-order multibit architecture with up to 90-dBA signal-to-noise ratio (SNR) at audio sampling rates up to 96 kHz,
enabling high-fidelity audio recording in a compact, power-saving design. The DAC sigma-delta modulator features
a second-order multibit architecture with up to 100-dBA SNR at audio sampling rates up to 96 kHz, enabling
high-quality digital audio-playback capability, while consuming less than 23 mW during playback only. The
TL V320AIC23 is the ideal analog input/output (I/O) choice for portable digital audio-player and recorder applications,
such as MP3 digital audio players.
Integrated analog features consist of stereo-line inputs with an analog bypass path, a stereo headphone amplifier,
with analog volume control and mute, and a complete electret-microphone-capsule biasing and buffering solution.
The headphone amplifier is capable of delivering 30 mW per channel into 32 Ω. The analog bypass path allows use
of the stereo-line inputs and the headphone amplifier with analog volume control, while completely bypassing the
codec, thus enabling further design flexibility, such as integrated FM tuners. A microphone bias-voltage output
provides a low-noise current source for electret-capsule biasing. The AIC23 has an integrated adjustable microphone
amplifier (gain adjustable from 1 to 5) and a programmable gain microphone amplifier (0 dB or 20 dB). The
microphone signal can be mixed with the output signals if a sidetone is required.
While the TL V320AIC23 supports the industry-standard oversampling rates of 256 f
rates of 250 f
and 272 fs are provided, which optimize interface considerations in designs using TI C54x digital signal
s
processors (DSPs) and universal serial bus (USB) data interfaces. A single 12-MHz crystal can supply clocking to
the DSP, USB, and codec. The TLV320AIC23 features an internal oscillator that, when connected to a 12-MHz
external crystal, provides a system clock to the DSP and other peripherals at either 12 MHz or 6 MHz, using an internal
clock buffer and selectable divider. Audio sample rates of 48 kHz and compact-disc (CD) standard 44.1 kHz are
supported directly from a 12-MHz master clock with 250 f
and 272 fs oversampling rates.
s
Low power consumption and flexible power management allow selective shutdown of codec functions, thus
extending battery life in portable applications. This design solution, coupled with the industry’s smallest package, the
TI proprietary MicroStar Junior using only 25 mm
2
of board area, makes powerful portable stereo audio designs
easily realizable in a cost-effective, space-saving total analog I/O solution: the TLV320AIC23.
and 384 fs, unique oversampling
s
1.1Features
•High-Performance Stereo Codec
–90-dB SNR Multibit Sigma-Delta ADC (A-weighted at 48 kHz)
–100-dB SNR Multibit Sigma-Delta DAC (A-weighted at 48 kHz)
–1.42 V – 3.6 V Core Digital Supply: Compatible With TI C54x DSP Core Voltages
–2.7 V – 3.6 V Buffer and Analog Supply: Compatible Both TI C54x DSP Buffer Voltages
–8-kHz – 96-kHz Sampling-Frequency Support
•Software Control Via TI McBSP-Compatible Multiprotocol Serial Port
–I2C-Compatible and SPI-Compatible Serial-Port Protocols
–Glueless Interface to TI McBSPs
•Audio-Data Input/Output Via TI McBSP-Compatible Programmable Audio Interface
2
S-Compatible Interface Requiring Only One McBSP for both ADC and DAC
–I
–Standard I
–16/20/24/32-Bit Word Lengths
MicroStar Junior is a trademark of Texas Instruments.
2
S, MSB, or LSB Justified-Data Transfers
1–1
–Audio Master/Slave Timing Capability Optimized for TI DSPs (250/272 fs), USB mode
–Industry-Standard Master/Slave Support Provided Also (256/384 f
), Normal mode
s
–Glueless Interface to TI McBSPs
•Integrated Total Electret-Microphone Biasing and Buffering Solution
–Low-Noise MICBIAS pin at 3/4 AVDD for Biasing of Electret Capsules
–Integrated Buffer Amplifier With Tunable Fixed Gain of 1 to 5
–Additional Control-Register Selectable Buffer Gain of 0 dB or 20 dB
•Stereo-Line Inputs
–Integrated Programmable Gain Amplifier
–Analog Bypass Path of Codec
•ADC Multiplexed Input for Stereo-Line Inputs and Microphone
•Stereo-Line Outputs
–Analog Stereo Mixer for DAC and Analog Bypass Path
•Analog Volume Control With Mute
•Highly Efficient Linear Headphone Amplifier
–30 mW into 32 Ω From a 3.3-V Analog Supply Voltage
•Flexible Power Management Under Total Software Control
–23-mW Power Consumption During Playback Mode
–Standby Power Consumption <150 µW
–Power-Down Power Consumption <15 µW
•Industry’s Smallest Package: 32-Pin TI Proprietary MicroStar Junior
2
Total Board Area
–25 mm
–28-Pin TSSOP Also Is Available (62 mm
2
Total Board Area)
•Ideally Suitable for Portable Solid-State Audio Players and Recorders
1–2
1.2Functional Block Diagram
AVDD
VMID
AGND
MICBIAS
RLINEIN
MICIN
LLINEIN
HPVDD
HPGND
RHPOUT
50 kΩ
50 kΩ
12 to –34.5 dB,
10 kΩ
VMID
12 to –34 dB,
Headphone
Driver
1.0X
1.0X
1.0X
1.5X
1.5 dB Steps
50 kΩ
1.5 dB Steps
6 to –73 dB,
1 dB Steps
VADC
VDAC
VMID
Bypass
Mute
Line
Mute
Line
Mute
Bypass
Mute
Mute,
0 dB, 20 dB
2:1
MUX
Σ
DSPcodec
TLV320AIC23
2:1
MUX
VADC
Side Tone
Mute
Σ–∆
ADC
Σ–∆
ADC
Σ–∆
DAC
Control
Interface
Digital
Filters
CS
SDIN
SCLK
MODE
DVDD
BVDD
DGND
ROUT
LOUT
LHPOUT
Headphone
Driver
XTI/MCLK
XTO
CLKOUT
NOTE: MCLK, BCLK, and SCLK are all asynchronous to each other.
–10°C to 70°CTLV320AIC23GQETLV320AIC23PW
–40°C to 85°CTLV320AIC23IGQETLV320AIC23IPW
1–4
PACKAGE
32-Pin
MicroStar Junior GQE
28-Pin
TSSOP PW
1.5Terminal Functions
NAME
I/O
TERMINAL
NO.
GQEPW
AGND515Analog supply return
AVDD414Analog supply input. Voltage level is 3.3 V nominal.
BCLK233I/OI2S serial-bit clock. In audio master mode, the AIC23 generates this signal and sends it to the DSP. In
BVDD211Buffer supply input. V oltage range is from 2.7 V to 3.6 V.
CLKOUT222OClock output. This is a buffered version of the XTI input and is available in 1X or 1/2X frequencies of XTI.
CS1221IControl port input latch/address select. For SPI control mode this input acts as the data latch control. For
DIN244II2S format serial data input to the sigma-delta stereo DAC
DGND2028Digital supply return
DOUT276OI2S format serial data output from the sigma-delta stereo ADC
DVDD1927Digital supply input. Voltage range is 3.3 V nominal.
HPGND3211Analog headphone amplifier supply return
HPVDD298Analog headphone amplifier supply input. Voltage level is 3.3 V nominal.
LHPOUT309OLeft stereo mixer-channel amplified headphone output. Nominal 0-dB output level is 1 V
LLINEIN1120ILeft stereo-line input channel. Nominal 0-dB input level is 1 V
LOUT212OLeft stereo mixer-channel line output. Nominal output level is 1.0 V
LRCIN265I/OI2S DAC-word clock signal. In audio master mode, the AIC23 generates this framing signal and sends it
LRCOUT287I/OI2S ADC-word clock signal. In audio master mode, the AIC23 generates this framing signal and sends it
MICBIAS717OBuffered low-noise-voltage output suitable for electret-microphone-capsule biasing. Voltage level is 3/4
MICIN818IBuffered amplifier input suitable for use with electret-microphone capsules. Without external resistors a
MODE1322ISerial-interface-mode input. See Section 3.1 for details.
NC1, 9
17, 25
RHPOUT3110ORight stereo mixer-channel amplified headphone output. Nominal 0-dB output level is 1 V
RLINEIN1019IRight stereo-line input channel. Nominal 0-dB input level is 1 V
ROUT313ORight stereo mixer-channel line output. Nominal output level is 1.0 V
SCLK1524IControl-port serial-data clock. For SPI and I2C control modes this is the serial-clock input. See Section
SDIN1423IControl-port serial-data input. For SPI and I2C control modes this is the serial-data input and also is used
VMID616IMidrail voltage decoupling input. 10-µF and 0.1-µF capacitors should be connected in parallel to this
XTI/MCLK1625ICrystal or external-clock input. Used for derivation of all internal clocks on the AIC23.
XTO1826OCrystal output. Connect to external crystal for applications where the AIC23 is the audio timing master.
audio slave mode, the signal is generated by the DSP.
Bit 07 in the sample rate control register controls frequency selection.
I2C control mode this input defines the seventh bit in the device address field. See Section 3.1 for details.
dB to 6 dB is provided in 1-dB steps.
in 1.5-dB steps.
to the DSP. In audio slave mode, the signal is generated by the DSP.
to the DSP. In audio slave mode, the signal is generated by the DSP.
AVDD nominal.
default gain of 5 is provided. See Section 2.3.1.2 for details.
Not Used—No internal connection
–73 dB to 6 dB is provided in 1-dB steps.
in 1.5-dB steps.
3.1 for details.
to select the control protocol after reset. See Section 3.1 for details.
terminal for noise filtering. Voltage level is 1/2 AVDD nominal.
Not used in applications where external clock source is used.
DESCRIPTION
RMS
. Gain of –34.5 dB to 12 dB is provided
RMS
.
RMS
RMS
. Gain of –34.5 dB to 12 dB is provided
RMS
.
RMS
. Gain of –73
. Gain of
1–5
1–6
2 Specifications
2.1Absolute Maximum Ratings Over Operating Free-Air Temperature Range (unless
otherwise noted)
Supply voltage range, AVDD to AGND, DVDD to DGND, BVDD to DGND, HPVDD to HPGND
Operating free-air temperature range, T
Storage temperature range, T
†
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTE 1: DVDD may not exceed BVDD + 0.3V; BVDD may not exceed AVDD + 0.3V or HPVDD + 0.3.
Analog supply voltage, A VDD, HPVDD (see Note 2)2.73.33.6V
Digital buffer supply voltage, BVDD (see Note 2)2.73.33.6V
Digital core supply voltage, DVDD (see Note 2)1.421.53.6V
Analog input voltage, full scale – 0dB (AVDD = 3.3 V)1V
Stereo-line output load resistance10kΩ
Headphone-amplifier output load resistance0Ω
CLKOUT digital output load capacitance20pF
All other digital output load capacitance10pF
Stereo-line output load capacitance50pF
XTI master clock Input18.43MHz
ADC or DAC conversion rate96kHz
Operating free-air temperature, T
NOTE 2: Digital voltage values are with respect to DGND; analog voltage values are with respect to AGND.
A
–1070°C
RMS
2–1
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