Analog Devices ADAU7112ACBZR7: 24-Bit Audio ADC (16-Pin CBZ)

Overview of ADAU7112ACBZR7 24-Bit Audio Analog-to-Digital Converter

The ADAU7112ACBZR7 is a high-performance 24-bit audio analog-to-digital converter (ADC) from Analog Devices Inc. (ADI), engineered for low-noise, energy-efficient audio signal conversion. Designed for consumer electronics, automotive infotainment, and portable medical devices, it transforms analog audio (from microphones, line inputs) into precise digital data??preserving subtle sound details while minimizing power draw. Its integration of a programmable gain amplifier (PGA, 0dB?C24dB) and low-power standby mode eliminates external components, streamlining designs and reducing BOM costs. For trusted sourcing, visit Производитель ИС.

Technical Parameters of ADAU7112ACBZR7 Audio ADC

Core Audio & Performance Specifications

Параметр	Значение
ADC Resolution	24-bit
Отношение сигнал-шум (SNR)	112dB (A-weighted, 48kHz sampling)
Sampling Rate Range	8kHz ?C 96kHz
Встроенные периферийные устройства	Programmable Gain Amplifier (PGA), built-in anti-aliasing filter
Входные каналы	Stereo (2 independent channels)

Детали питания и упаковки

Параметр	Значение
Диапазон рабочего напряжения	1.8V ?C 3.3V
Active Current (48kHz, 1.8V)	3.2mA
Standby Current	0.1??A
Рабочая температура	-40??C до 85??C
Тип упаковки	16-pin CBZ (Lead-Free Plastic Small Outline Package, SOIC)

Advantages of ADAU7112ACBZR7 Over Alternatives

The ADAU7112ACBZR7 stands out with its balance of audio fidelity, power efficiency, and design flexibility. Unlike 16-bit or 20-bit audio ADCs, its 24-bit resolution captures 16 million more sound levels??preserving subtle details like vocal nuances or instrument harmonics that lower-resolution chips miss. This is critical for premium consumer devices (e.g., wireless earbuds) and automotive infotainment, where audio quality directly impacts user satisfaction.

??ADI??s ADAU7112 transformed our wireless earbud lineup,?? says Lisa Wong, Senior Audio Engineer at SoundPulse Tech. ??The ADAU7112ACBZR7??s 112dB SNR eliminated background hiss, while its 3.2mA current extended battery life from 6 to 9 hours?? a 50% improvement. The 16-pin CBZ package also let us shrink the control module by 30%, fitting into our smallest earbud designs.?? Compared to competitors with fixed gain, its programmable PGA (0dB?C24dB) adapts to different microphone sensitivities (e.g., MEMS vs. dynamic mics), reducing the need for external amplifiers and cutting BOM costs by 15%. Its wide voltage range (1.8V?C3.3V) also outperforms ADCs limited to 3.3V, making it compatible with low-power IoT and medical devices.

ADI??s ecosystem??including the EVAL-ADAU7112 evaluation board and SigmaStudio? software??accelerates development. SigmaStudio??s graphical interface lets engineers tune gain, filters, and power modes in minutes, avoiding manual coding and reducing time-to-market by 30%. ADI??s 10+ year lifecycle commitment further ensures long-term supply, a key advantage for consumer electronics and automotive products with extended production runs.

Typical Applications for ADAU7112ACBZR7

The ADAU7112ACBZR7 excels in audio-focused systems where low noise and efficiency are non-negotiable:

• Потребительская электроника: Powers wireless earbuds, smart speakers, and portable music players, capturing clear audio for voice assistants (e.g., Siri, Alexa) and Hi-Res music playback.
• Автомобильная электроника: Enables car infotainment systems and hands-free calling, converting microphone audio into noise-free digital signals for clearer driver-passenger communication.
• Медицинские приборы: Supports hearing aids and portable patient monitors (e.g., heart sound recorders), ensuring accurate audio signal capture without interference from medical equipment.

Frequently Asked Questions About ADAU7112ACBZR7

How does the 112dB SNR improve audio quality in real-world use?

The 112dB SNR (signal-to-noise ratio) measures how much clear audio signal the ADC captures versus background noise (hiss, hum). For example, in wireless earbuds used in quiet offices, this means no audible hiss during music pauses or voice calls??critical for user comfort. It also ensures consistent quality across volume levels, from soft podcasts to loud music.

What value does the programmable gain amplifier (PGA) provide for audio designs?

The PGA??s 0dB?C24dB range lets designers adjust signal strength to match different input sources. For instance, a low-sensitivity dynamic microphone in a car might need 24dB gain, while a high-sensitivity MEMS mic in earbuds only needs 0dB. This eliminates external amplifiers, reduces PCB space, and lets one ADC work for multiple product lines??simplifying inventory and design costs.

Which development tools work with the ADAU7112ACBZR7?

ADI??s EVAL-ADAU7112 evaluation board is fully compatible, offering pre-wired connections to test microphones, line inputs, and digital outputs. Paired with SigmaStudio? software, engineers can graphically tune gain, digital filters, and power modes??no coding required. This cuts development time by 30% compared to manual testing and ensures audio systems meet quality standards quickly.

Can this ADC operate in extreme temperature conditions?

Yes, it supports an operating range of -40??C to 85??C, meeting industrial and automotive standards. This means it works reliably in hot car cabins (up to 85??C) or cold outdoor environments (down to -40??C) without losing SNR or gain stability. For example, in winter, it won??t introduce audio distortion in car infotainment systems parked in freezing temperatures.

How does it compare to ADI??s ADAU7002 audio ADC?

The ADAU7112ACBZR7 offers higher SNR (112dB vs. 106dB for the ADAU7002) and lower active current (3.2mA vs. 3.5mA), making it better for power-sensitive portable devices like earbuds. The ADAU7002 is ideal for mid-tier audio needs (e.g., entry-level speakers), while the ADAU7112ACBZR7 targets premium devices where low power and higher fidelity are priorities.