TI-TLV320AIC3254-Q1：超低功耗立体声音频编解码器

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"TI-TLV320AIC3254-Q1.pdf 是一款超低功耗立体声音频编解码器，具有嵌入式微型数字信号处理器(miniDSP)功能，适合汽车、便携式导航设备、媒体播放器、移动设备等多种应用场景。" TI的TLV320AIC3254-Q1是一款专为汽车电子和其他低功耗应用设计的音频编解码器，其核心特点包括： 1. 可编程麦克风偏压：该器件允许用户根据不同的麦克风类型和需求调整偏置电压，确保最佳的音频输入质量。 2. 符合汽车应用要求：满足AEC-Q100标准，能够在-40°C至85°C的温度范围内稳定工作，适用于汽车环境。 3. 可编程锁相环(PLL)：提供灵活的时钟管理，可以根据系统需求进行频率合成，以适应各种工作模式和接口速度。 4. 集成LDO：内置低压降稳压器，降低了对外部电源的需求，简化了电路设计，并有助于提高能效。 5. 小型化封装：采用32-pin 5mm x 5mm QFN封装，减小了板级空间占用，有利于紧凑型产品的设计。 6. 高ESD保护等级：达到HBM H2和CDM C4B静电放电防护等级，增强了器件在实际使用中的可靠性。 7. 高性能音频特性： - 高信噪比(SNR)：立体声DAC和ADC分别具有100dB和93dB的SNR，确保了高质量的音频输出和输入。 - 低功耗：4.1mW立体声48kHz DAC回放和6.1mW立体声48kHz ADC录音，实现了高效节能。 8. 高级功能： - 回声消除(AEC)：用于语音通话应用，减少回声并改善通话质量。 - 有源噪声消除(ANC)：可以消除背景噪声，提升听觉体验。 - PowerTune™技术：动态管理功耗，优化性能与电池寿命之间的平衡。 - 先进DSP算法：支持多种音频处理选项，如均衡器、混响等，提供丰富的音效定制能力。 9. 广泛的信号处理选择：内置的miniDSP功能，允许开发者编写自定义的数字滤波器和信号处理程序，增强了器件的灵活性和应用多样性。 TLV320AIC3254-Q1是汽车电子、便携式设备以及通信等领域音频处理的理想选择，它的低功耗特性、高集成度以及强大的处理能力，使其能够适应各种复杂的应用场景。

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TLV320AIC3254-Q1

www.ti.com.cn

ZHCSBE9A –MAY 2013–REVISED AUGUST 2013

Electrical Characteristics, ADC

At 25°C, AV

, DV

, IOV

= 1.8V, LDOIN = 3.3V, AV

LDO disabled, f

(Audio) = 48kHz, C

ref

= 10µF on REF pin, PLL

disabled unless otherwise noted.

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

AUDIO ADC

(1) (2)

Input signal level (0dB) Single-ended, CM = 0.9V 0.5 V

RMS

1kHz sine wave input

Single-ended Configuration

IN1R to Right ADC and IN1L to Left ADC,

= 20K, f

= 48kHz,

Device Setup AOSR = 128, MCLK = 256 * f

PLL Disabled; AGC = OFF,

Channel Gain = 0dB,

Processing Block = PRB_R1,

Power Tune = PTM_R4

Inputs ac-shorted to ground 80 93

IN2R, IN3R routed to Right ADC and ac-shorted to 93

Signal-to-noise ratio, A-

SNR dB

ground

weighted

(1)(2)

–40°C 76

IN2L, IN3L routed to Left ADC and ac-shorted to

85°C 68

ground

DR Dynamic range A-weighted

(1)(2)

–60dB full-scale, 1-kHz input signal 92 dB

–3 dB full-scale, 1-kHz input signal –85 –70 dB

Total Harmonic Distortion plus

IN2R,IN3R routed to Right ADC –85

THD+N

Noise

IN2L, IN3L routed to Left ADC

85°C –68

–3dB full-scale, 1-kHz input signal

AUDIO ADC

Input signal level (0dB) Single-ended, CM = 0.75V, AV

= 1.5V 0.375 V

RMS

1kHz sine wave input

Single-ended Configuration

IN1R, IN2R, IN3R routed to Right ADC

IN1L, IN2L, IN3L routed to Left ADC

= 20kΩ, f

= 48kHz,

Device Setup

AOSR = 128, MCLK = 256* f

PLL Disabled, AGC = OFF,

Channel Gain = 0dB,

Processing Block = PRB_R1

Power Tune = PTM_R4

SNR Signal-to-noise ratio, A-weighted Inputs ac-shorted to ground 91 dB

(1)(2)

DR Dynamic range A-weighted

(1)(2)

–60dB full-scale, 1-kHz input signal 90 dB

THD+N Total Harmonic Distortion plus –3dB full-scale, 1-kHz input signal –80 dB

Noise

(1) Ratio of output level with 1kHz full-scale sine wave input, to the output level with the inputs short circuited, measured A-weighted over a

20Hz to 20kHz bandwidth using an audio analyzer.

(2) All performance measured with 20kHz low-pass filter and, where noted, A-weighted filter. Failure to use such a filter may result in higher

THD+N and lower SNR and dynamic range readings than shown in the Electrical Characteristics. The low-pass filter removes out-of-

band noise, which, although not audible, may affect dynamic specification values.

TLV320AIC3254-Q1

ZHCSBE9A –MAY 2013–REVISED AUGUST 2013

www.ti.com.cn

Electrical Characteristics, ADC (continued)

At 25°C, AV

, DV

, IOV

= 1.8V, LDOIN = 3.3V, AV

LDO disabled, f

(Audio) = 48kHz, C

ref

= 10µF on REF pin, PLL

disabled unless otherwise noted.

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

AUDIO ADC

Input signal level (0dB) Differential Input, CM = 0.9V 10 mV

1kHz sine wave input

Differential configuration

IN1L and IN1R routed to Right ADC

IN2L and IN2R routed to Left ADC

Device Setup

= 10K, f

= 48kHz, AOSR = 128

MCLK = 256* f

PLL Disabled

AGC = OFF, Channel Gain = 40dB Processing Block =

PRB_R1,

Power Tune = PTM_R4

ICN Idle-Channel Noise, A- Inputs ac-shorted to ground, input referred noise 2 μV

RMS

weighted

(3)(4)

AUDIO ADC

1kHz sine wave input –0.05 dB

Single-ended configuration

= 20kΩ f

= 48kHz, AOSR = 128,

Gain Error MCLK = 256 * f

, PLL Disabled

AGC = OFF, Channel Gain = 0dB

Processing Block = PRB_R1,

Power Tune = PTM_R4, CM = 0.9V

1kHz sine wave input at -3dBFS 108 dB

Single-ended configuration

IN1L routed to Left ADC

Input Channel Separation

IN1R routed to Right ADC, R

= 20kΩ

AGC = OFF, AOSR = 128,

Channel Gain = 0dB, CM = 0.9V

1kHz sine wave input at –3dBFS on IN2L, IN2L internally 115 dB

not routed.

Input Pin Crosstalk

IN1L routed to Left ADC

ac-coupled to ground

1kHz sine wave input at –3dBFS on IN2R,

IN2R internally not routed.

IN1R routed to Right ADC

ac-coupled to ground

Single-ended configuration R

= 20kΩ,

AOSR = 128 Channel, Gain = 0dB, CM = 0.9V

217Hz, 100mVpp signal on AV

, 55 dB

PSRR Single-ended configuration, R

= 20kΩ,

Channel Gain = 0dB; CM = 0.9V

Single-Ended, R

= 10kΩ, PGA gain set to 0dB 0 dB

Single-Ended, R

= 10kΩ, PGA gain set to 47.5dB 47.5 dB

Single-Ended, R

= 20kΩ, PGA gain set to 0dB –6 dB

ADC programmable gain

amplifier gain

Single-Ended, R

= 20kΩ, PGA gain set to 47.5dB 41.5 dB

Single-Ended, R

= 40kΩ, PGA gain set to 0dB –12 dB

Single-Ended, R

= 40kΩ, PGA gain set to 47.5dB 35.5 dB

ADC programmable gain 1-kHz tone 0.5 dB

amplifier step size

(3) Ratio of output level with 1kHz full-scale sine wave input, to the output level with the inputs short circuited, measured A-weighted over a

20Hz to 20kHz bandwidth using an audio analyzer.

(4) All performance measured with 20kHz low-pass filter and, where noted, A-weighted filter. Failure to use such a filter may result in higher

THD+N and lower SNR and dynamic range readings than shown in the Electrical Characteristics. The low-pass filter removes out-of-

band noise, which, although not audible, may affect dynamic specification values.

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