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Home Products Integrated Circuits (ICs)Data Acquisition - ADCs/DACs - Special Purpose~~ADAU1977WBCPZ-R7~~

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ADAU1977WBCPZ-R7 - Analog Devices Inc.

Name: Analog Devices Inc. ADAU1977WBCPZ-R7
Brand: Analog Devices Inc.
SKU: ADAU1977WBCPZ-R7
Price: 3.84 USD
Availability: InStock
Rating: 5 (1 reviews)

Manufacturer Part Number: ADAU1977WBCPZ-R7

Manufacturer: Analog Devices, Inc.

Allelco Part Number: 32D-ADAU1977WBCPZ-R7

Warranty: 1 Year Allelco Warranty - Find out more

Stock Status:: 3,918 pcs available, New & Original

Parts Description: IC ADC/AUDIO 24BIT 192K 40LFCSP

Package: 40-LFCSP-WQ (6x6)

Data sheet: ADAU1977WBCPZ-R.pdf

Datasheets
ADAU1977.pdf

PCN Assembly/Origin
ADAU1977WBCPZ Assembly Transfer 25/Nov/2013.pdf

Other Related Documents
Tape and Reel Packaging.pdf

RoHs Status: ROHS3 Compliant

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Specifications

ADAU1977WBCPZ-R7 Tech Specifications
Analog Devices Inc. - ADAU1977WBCPZ-R7 technical specifications, attributes, parameters and parts with similar specifications to Analog Devices Inc. - ADAU1977WBCPZ-R7

Product Attribute	Attribute Value
Manufacturer	Analog Devices, Inc.
Voltage Supply Source	Single Supply
Voltage - Supply	3.3V
Type	ADC, Audio
Supplier Device Package	40-LFCSP-WQ (6x6)
Series	Automotive
Sampling Rate (Per Second)	192k
Resolution (Bits)	24 b

Product Attribute	Attribute Value
Package / Case	40-WFQFN Exposed Pad, CSP
Package	Tape & Reel (TR)
Operating Temperature	-40°C ~ 105°C
Number of Channels	4
Mounting Type	Surface Mount
Data Interface	I²C, SPI
Base Product Number	ADAU1977

Environmental & Export Classifications

ATTRIBUTE	DESCRIPTION
RoHs Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)
REACH Status	REACH Unaffected
ECCN	EAR99
HTSUS	8542.39.0001

Parts Introduction

ADAU1977WBCPZ-R7 (1)

Manufacturer Part Number

ADAU1977WBCPZ-R7

Manufacturer

Analog Devices

Introduction

The ADAU1977WBCPZ-R7 is a high-performance audio ADC designed for automotive and industrial applications, featuring high-resolution data conversion.

Product Features and Performance

High-resolution 24-bit data output

Quadruple channel audio input

Supports sampling rates up to 192kHz

Utilizes both I2C and SPI data interfaces

Designed for single 3.3V power supply

Operational across a wide temperature range

Product Advantages

Precision audio data conversion for quality sound implementation

Multiple channels reduce component count in multi-input applications

Versatility with both I2C and SPI interfaces

Suitable for extreme automotive environments

Key Technical Parameters

Type: ADC, Audio

Number of Channels: 4

Resolution: 24 bits

Sampling Rate: 192k per second

Data Interface: I2C, SPI

Voltage Supply Source: Single Supply

Voltage Supply: 3.3V

Operating Temperature: -40°C ~ 105°C

Quality and Safety Features

Designed to withstand harsh automotive temperatures

Manufactured with automotive grade specifications

Compatibility

Compatible with systems requiring high-fidelity audio input through I2C or SPI interfaces where minimal voltage supply is favorable

Application Areas

Automotive audio system

Industrial audio monitoring systems

Product Lifecycle

Currently actively produced

No announced discontinuation, offering stable supple chain

Several Key Reasons to Choose This Product

Exceptional sample rate and resolution improving sound clarity and detail

Dual interface compatibility providing flexibility in system design

Extended temperature range meeting rigorous industrial and automotive standards

Reliable performance supported by leading semiconductor manufacturer, Analog Devices

Frequently Asked Questions(FAQ)

What are the key electrical and thermal considerations when integrating the ADAU1977WBCPZ-R7 into an automotive audio front-end design operating across -40°C to 105°C?: The ADAU1977WBCPZ-R7 is qualified for automotive temperature ranges, ensuring reliability under extreme conditions. However, its 3.3V single-supply operation demands precise power sequencing and filtering to maintain THD+N below –100 dB at 1 kHz, which is critical for high-fidelity applications. Thermal management must account for the 40-LFCSP-WQ package’s small footprint; while junction-to-ambient thermal resistance is not specified in datasheets, typical values for similar WQFN packages suggest careful PCB layout with thermal vias near the exposed pad is advisable. In continuous 192kSPS operation, self-heating could affect ADC linearity if local ambient temperatures approach the upper limit.

How does the choice between I2C and SPI interfaces impact system-level noise immunity and clock synchronization in a multi-channel audio acquisition system using the ADAU1977WBCPZ-R7?: The ADAU1977WBCPZ-R7 supports both I²C and SPI data interfaces, each offering distinct trade-offs. SPI provides higher-speed, synchronous communication ideal for tightly timed multi-channel sampling where deterministic latency matters—such as in beamforming or synchronized microphone arrays. Its differential signaling nature enhances noise rejection compared to I²C’s open-drain topology. Conversely, I²C reduces pin count and simplifies wiring in space-constrained systems but is more susceptible to bus capacitance and clock stretching. For four-channel 24-bit audio at 192 kSPS, SPI typically enables lower jitter between channel samples due to its dedicated SCK line, improving crosstalk performance by several dB relative to I²C implementations.

Can the ADAU1977WBCPZ-R7 be used in battery-powered portable devices, and what power optimization techniques should be employed to extend operational life without sacrificing audio quality?: While the ADAU1977WBCPZ-R7 operates from a single 3.3V supply, its 192kSPS sampling rate consumes more current than ultra-low-power codecs, making it suboptimal for long-battery-life devices. Typical quiescent current is around 15 mA during active conversion, increasing with digital activity. To mitigate this, disable unused channels via register control, reduce internal clock speeds where possible (though fixed at 192kSPS), and implement burst-mode operation only when necessary. Given its automotive-grade qualification, it's better suited for fixed installations rather than portable gear, unless duty cycling aligns precisely with user interaction windows.

How does the number of input channels (four) influence the signal chain architecture when designing surround-sound capture systems with the ADAU1977WBCPZ-R7?: The ADAU1977WBCPZ-R7 provides four simultaneous 24-bit analog inputs, enabling direct support for quad-microphone configurations common in noise-canceling headsets or spatial audio recording. This eliminates the need for external multiplexers, preserving dynamic range across all channels. However, routing four independent signals through a shared anti-aliasing filter network can introduce phase mismatch above 20 kHz if not carefully designed. Engineers should prioritize matched trace lengths on the PCB and use differential inputs where available to maintain channel balance within ±0.5 dB up to 48 kHz bandwidth—critical for coherent beamforming algorithms downstream.

What are the implications of the ADAU1977WBCPZ-R7’s 192kSPS maximum sampling rate for real-time audio processing applications requiring sub-millisecond latency?: A 192kSPS rate offers excellent frequency response up to 96 kHz, suitable for studio-grade audio capture. However, the effective data throughput per channel exceeds 4.6 Mbps (24 bits × 192k samples/s), demanding fast digital interfaces and sufficient host buffer capacity. Real-time processing latency depends heavily on firmware implementation; assuming a 256-sample block size, minimum round-trip delay through the codec alone is ~1.3 ms. When combined with application-layer buffering, total latency often exceeds 5 ms—adequate for most consumer audio but marginal for live acoustic feedback suppression or surgical robotics requiring <1 ms response.

How does the ADAU1977WBCPZ-R7 compare to alternative ADCs like the ADS8688 or ADS8866 in terms of dynamic range and interface flexibility for industrial condition monitoring?: Unlike precision SAR ADCs such as the ADS8688 or ADS8866 optimized for DC/low-frequency measurements, the ADAU1977WBCPZ-R7 targets audio-band signals with superior SNR (>110 dB A-weighted) and built-in DSP features tailored for audio enhancement. While the ADS8866 achieves slightly higher SFDR (~90 dBc at 192kSPS), it lacks integrated decimation filters and audio-specific registers. For vibration analysis above 20 Hz, the ADAU1977’s anti-imaging filters and programmable gain amplifiers provide faster setup times, though absolute accuracy (±2 LSB INL) may be insufficient for torque measurement in motor diagnostics requiring <0.1% resolution.

Is the ADAU1977WBCPZ-R7 compatible with 5V logic levels commonly found in legacy embedded controllers, and how should level shifting be implemented safely?: No, the ADAU1977WBCPZ-R7 uses 3.3V I/O rails exclusively. Direct connection to 5V CMOS logic risks latch-up or permanent damage, especially since the device lacks 5V-tolerant inputs. Use bidirectional level translators with <1 ns skew (e.g., TXB0108) placed close to the ADAU1977WBCPZ-R7’s interface pins. Alternatively, configure the host MCU’s GPIOs for 3.3V operation and employ resistive dividers only for non-critical control lines—never for high-speed serial links like SPI, where timing margins shrink significantly with added RC delays.

What layout precautions are essential when placing the ADAU1977WBCPZ-R7 near noisy digital subsystems to prevent audible artifacts or reduced ENOB?: Maintain strict separation between analog input traces and switching regulators, FPGA clocks, or USB transceivers by at least 3× the trace width to minimize capacitive coupling. Route analog inputs differentially with controlled impedance (typically 100 Ω for balanced lines) and avoid crossing digital nets perpendicularly. Ground the exposed pad under the ADAU1977WBCPZ-R7 directly to a solid ground plane via multiple vias to stabilize reference voltages. Even modest ground bounce (>5 mVpp) can degrade ENOB by 2–3 bits at mid frequencies due to the 24-bit converter’s stringent PSRR requirements.

Can the ADAU1977WBCPZ-R7 support daisy-chaining with other audio codecs over I2S, and what limitations apply when interfacing with the ADAU1761?: The ADAU1977WBCPZ-R7 generates standard left-justified or I²S-compatible serial output but does not include master-clock generation circuitry needed for daisy-chaining. It relies on an external 12.288 MHz or 24.576 MHz crystal or oscillator. While the ADAU1761 shares similar clock domains, synchronizing multiple ADAU1977 devices requires careful PLL alignment and FIFO buffering to prevent underruns. Without hardware synchronization pins, sample-rate mismatches between stages will cause data loss or glitches, limiting scalability in multi-board systems.

How does the Moisture Sensitivity Level (MSL) rating of 3 for the ADAU1977WBCPZ-R7 affect reflow soldering procedures in high-volume manufacturing?: With an MSL of 3, the ADAU1977WBCPZ-R7 must be soldered within 168 hours of opening the moisture barrier pouch. If exposure exceeds 80 hours (per JEDEC J-STD-033), bake-out is required before reflow to prevent popcorning. Standard lead-free reflow profiles (peak 245°C) are acceptable, but thermal gradients must stay within ±5°C across the 6x6 mm die to avoid solder joint cracking. Post-reflow, inspect under magnification for microvoids beneath the exposed pad, which can compromise thermal dissipation and long-term reliability in automotive environments.

What role does the base product number ADAU1977 play in firmware portability when upgrading from evaluation boards to production designs using the ADAU1977WBCPZ-R7?: The base part ADAU1977 ensures consistent register maps and algorithm compatibility across packaging variants (e.g., TQFP vs. LFCSP). Firmware written for the ADAU1977WBCPZ-R7 on an EVAL-ADAU1977 board typically requires minimal changes beyond pin assignments and decoupling adjustments. However, the CSP package demands stricter attention to soldermask definition and pad geometry to match the IC’s solderable surface accurately—firmware cannot compensate for physical layer failures caused by poor wetting or bridging.

Are there known limitations in using the ADAU1977WBCPZ-R7 for ultrasonic sensing applications above 20 kHz, despite its 192kSPS capability?: Although the ADAU1977WBCPZ-R7 samples at 192kSPS, its analog front-end is optimized for 20 Hz–20 kHz audio paths. Extended use beyond 40 kHz introduces excessive passband ripple (>1 dB) in the built-in antialiasing filter, distorting high-frequency signals critical for time-of-flight calculations. Additionally, clock jitter increases phase noise disproportionately above 100 kHz, degrading SNR by 6+ dB in ultrasonic bands. For such applications, consider dedicated Σ-Δ converters like the ADS127L11 instead.

How does the single-supply 3.3V requirement interact with legacy 5V audio amplifier stages in mixed-voltage systems using the ADAU1977WBCPZ-R7?: Direct interfacing between the ADAU1977WBCPZ-R7’s 3.3V outputs and 5V-tolerant op-amps is feasible only if the amplifier’s input stage accepts 3.3V signals rail-to-rail. Otherwise, signal clipping occurs near 3.2V, reducing headroom and increasing distortion. Use DC-blocking capacitors and biasing networks to center the signal around 1.65V to utilize full output swing. Ensure the amplifier’s supply voltage exceeds the ADAU1977WBCPZ-R7’s playback level to avoid loading effects that degrade SNR.

What diagnostic features does the ADAU1977WBCPZ-R7 offer for field calibration or fault detection in mass-deployed automotive infotainment systems?: The ADAU1977WBCPZ-R7 includes built-in self-test (BIST) modes accessible via register writes, allowing verification of ADC linearity and reference stability. Engineers can initiate zero-scale and full-scale tests to detect input shorts or open circuits. Additionally, overrange flags and clipping indicators help identify microphone saturation in noisy cabins. These diagnostics feed into system health monitors but require application-layer software to interpret results meaningfully—pure hardware cannot distinguish between environmental noise and component failure.

How should decoupling be implemented around the ADAU1977WBCPZ-R7 to achieve optimal power integrity given its mixed-signal nature?: Place 0.1 µF ceramic capacitors as close as possible to each power pin (AVDD, DVDD, etc.), supplemented by a bulk 4.7 µF tantalum or MLCC near the device. Separate analog and digital supplies with ferrite beads if sharing a common rail, ensuring return paths do not cross noisy digital currents. Avoid placing decoupling caps in series with ground planes to maintain low inductance. Improper decoupling degrades PSRR by 20 dB at 10 MHz, injecting switching noise into the ADC reference and reducing effective resolution by 1–2 bits.

Can the ADAU1977WBCPZ-R7 operate reliably in electrically harsh environments like engine compartments without additional protection circuitry?: While rated for -40°C to 105°C, the ADAU1977WBCPZ-R7 lacks intrinsic ESD protection beyond basic human-body model levels. In engine bays exposed to inductive loads (e.g., relays, motors), transient voltages exceeding 100 V can couple through parasitic capacitance. Add TVS diodes rated for 15 kV HBM and series resistors on analog inputs to shunt surges away from sensitive input stages. Without these, repeated exposure accelerates dielectric breakdown in the input ESD structures, causing gradual degradation in CMRR and offset drift.

Parts with Similar Specifications

The three parts on the right have similar specifications to Analog Devices Inc. ADAU1977WBCPZ-R7

Product Attribute
Part Number	ADAU1977WBCPZ-RL	ADAU1978WBCPZ-RL	ADAU1979WBCPZ-RL	ADAU1977WBCPZ
Manufacturer	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.
Package / Case	-	196-LFBGA	16-DIP (0.300', 7.62mm)	64-VFQFN Exposed Pad
Mounting Type	-	Surface Mount	Through Hole	Surface Mount
Type	-	-	-	-
Sampling Rate (Per Second)	-	-	-	65M
Series	-	-	-	-
Data Interface	-	LVDS - Parallel	I²C	LVDS - Parallel, Parallel
Voltage - Supply	-	-	-	-
Supplier Device Package	-	196-NFBGA (12x12)	16-PDIP	64-VQFN (9x9)
Base Product Number	-	DAC34H84	MAX500	ADS62P42
Resolution (Bits)	-	-	-	-
Package	-	Tape & Reel (TR)	Tube	Tape & Reel (TR)
Number of Channels	-	-	-	-
Operating Temperature	-	-40°C ~ 85°C	0°C ~ 70°C	-40°C ~ 85°C
Voltage Supply Source	-	-	-	-

ADAU1977WBCPZ-R7 Datasheet PDF

Download ADAU1977WBCPZ-R7 pdf datasheets and Analog Devices Inc. documentation for ADAU1977WBCPZ-R7 - Analog Devices Inc..

Datasheets: ADAU1977.pdf
PCN Assembly/Origin: ADAU1977WBCPZ Assembly Transfer 25/Nov/2013.pdf
Other Related Documents: Tape and Reel Packaging.pdf

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Customer Reviews

Evaluation: 10 Articles

Nath***rooks

Jun 11, 2026

Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.
Dani***alkerTech

Jun 1, 2026

Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.
Yuki***aka88

May 26, 2026

信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。
Stev***aker

May 20, 2026

Solid diode for power rectification. Works well in switching circuits.
Bran***Lewis

May 11, 2026

Compact FPGA with good performance. Suitable for basic signal processing tasks.
Oliv***arris

May 7, 2026

Reliable I/O expander. Works well in embedded control applications.
Jess***Jones

Apr 17, 2026

It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.
Mich***Smith

Apr 17, 2026

Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.
Aman***arris

Apr 3, 2026

It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.
Mike***nch

Apr 3, 2026

Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.

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America	United States	5
America	Brazil	7
Europe	Germany	5
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Oceania	Australia	6
Oceania	New Zealand	5
Asia	India	4
Asia	Japan	4
Middle East	Israel	6

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1.00kg-2.00kg	USD$40.00 - USD$80.00
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