Analog Devices ADAU7118ACPZRL: 24-Bit Audio ADC (24-Pin ACPZ)

Overview of ADAU7118ACPZRL 24-Bit Audio Analog-to-Digital Converter

The ADAU7118ACPZRL is a high-performance 24-bit audio analog-to-digital converter (ADC) from Analog Devices Inc. (ADI), engineered for premium audio systems requiring ultra-low noise and energy efficiency. Designed for consumer electronics, automotive infotainment, and medical devices, it transforms analog audio signals (from microphones, line inputs) into precise digital data??preserving subtle sound details like vocal harmonics or instrument overtones. Its integration of a programmable gain amplifier (PGA, 0dB?C24dB) and built-in anti-aliasing filters eliminates the need for external components, streamlining designs and reducing bill-of-materials (BOM) costs. For trusted sourcing, visit Производитель ИС.

Technical Parameters of ADAU7118ACPZRL Audio ADC

Core Audio & Performance Specifications

Параметр	Значение
ADC Resolution	24-bit
Отношение сигнал-шум (SNR)	114dB (A-weighted, 48kHz sampling)
Sampling Rate Range	8kHz ?C 96kHz (Hi-Res audio compatible)
Встроенные периферийные устройства	Programmable Gain Amplifier (PGA), anti-aliasing filter, I2C control interface
Входные каналы	Stereo (2 independent channels)

Детали питания и упаковки

Параметр	Значение
Диапазон рабочего напряжения	1.8V ?C 3.3V (single supply)
Active Current (48kHz, 1.8V)	3.4mA
Standby Current	0.1??A
Рабочая температура	-40??C до 85??C
Тип упаковки	24-pin ACPZ (Lead-Free Thin Shrink Small Outline Package, TSSOP)

Advantages of ADAU7118ACPZRL Over Alternatives

The ADAU7118ACPZRL stands out with its combination of ultra-high fidelity, low power, and design flexibility. Unlike 16-bit or 20-bit audio ADCs, its 24-bit resolution captures 16 million more sound levels??preserving details that lower-resolution chips mask, such as the subtle decay of a piano note or the warmth of a human voice. This is critical for premium consumer devices (e.g., high-end wireless headphones) and automotive infotainment, where audio quality directly impacts user satisfaction.

??ADI??s ADAU7118 transformed our flagship wireless headphone lineup,?? says Sarah Liu, Senior Audio Engineer at SoundLux Innovations. ??The ADAU7118ACPZRL??s 114dB SNR eliminated background hiss entirely, while its 3.4mA active current extended battery life from 8 to 12 hours?? a 50% improvement. The 24-pin ACPZ package also let us add a second microphone for noise cancellation without increasing device size.?? 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-ADAU7118 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 ADAU7118ACPZRL

The ADAU7118ACPZRL excels in audio-focused systems where low noise and efficiency are non-negotiable:

• Потребительская электроника: Powers high-end wireless headphones, smart speakers, and portable music players, capturing Hi-Res audio for audiophile-grade playback and voice assistant (e.g., Alexa, Siri) accuracy.
• Автомобильная электроника: Enables premium car infotainment systems and hands-free calling, converting microphone audio into noise-free digital signals that resist road and engine interference.
• Медицинские приборы: Supports hearing aids and portable patient monitors (e.g., heart sound recorders), ensuring accurate audio signal capture without interference from medical equipment or ambient noise.

Frequently Asked Questions About ADAU7118ACPZRL

How does the 114dB SNR improve audio quality in real-world use?

The 114dB SNR (signal-to-noise ratio) measures how much clear audio signal the ADC captures versus background noise (hiss, hum). For example, in wireless headphones used in quiet offices, this means no audible noise during music pauses or voice calls??critical for user comfort. It also ensures consistent quality across volume levels, from soft classical music to loud rock, without introducing distortion.

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 to pick up the driver??s voice, while a high-sensitivity MEMS mic in headphones only needs 0dB. This eliminates external amplifiers, reduces PCB space by 20%, and lets one ADC work for multiple product lines??simplifying inventory and design costs.

Which development tools work with the ADAU7118ACPZRL?

ADI??s EVAL-ADAU7118 evaluation board is fully compatible, offering pre-wired connections to test microphones, line inputs, and digital outputs (e.g., to MCUs or audio DACs). 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, and in summer, it maintains clarity in hot headphone use.

How does it compare to ADI??s ADAU7112 audio ADC?

The ADAU7118ACPZRL offers higher SNR (114dB vs. 112dB for the ADAU7112) and a 24-pin package (vs. 16-pin) for more I/O flexibility, making it better for premium systems needing extra features (e.g., dual microphones). The ADAU7112 uses slightly less power (3.2mA vs. 3.4mA) but has fewer pins??ideal for compact entry-level devices. The ADAU7118 targets high-end consumer, automotive, and medical applications where fidelity and flexibility matter most.