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Analog Devices Inc. ADAU1328BSTZ-RL
- Part No.:
- ADAU1328BSTZ-RL
- Manufacturer:
- Analog Devices Inc.
- Category:
- CODECS
- Package:
- 48-LQFP
- Datasheet:
-
ADAU1328BSTZ-RL.pdf
- Description:
- IC CODEC 24BIT 2ADC/8DAC 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,009
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Product details
Overview
ADAU1328BSTZ-RL from Analog Devices is a 24-bit, 192 kHz stereo audio codec IC featuring two differential-input ADCs and eight single-ended-output DACs, integrated PLL clock generation, SPI control interface, and 48-lead LQFP packaging - deployed in home theater systems for multichannel analog audio I/O with low-EMI operation.
For engineers reviewing the ADAU1328BSTZ-RL datasheet, ADAU1328BSTZ-RL pinout, ADAU1328BSTZ-RL application, or ADAU1328BSTZ-RL equivalent, key selection considerations include its 108 dB DAC dynamic range, support for TDM up to 16 channels, 0.375 dB volume step resolution, 3.3 V dual-supply operation, and differential ADC input architecture requiring external 100 Ω + 1 nF RC filtering.
Technical Context
The ADAU1328BSTZ-RL implements sigma-delta ADCs with 79 dB stop-band attenuation and linear-phase decimation filters, plus interpolation DAC filters with 70 dB stop-band attenuation across 48/96/192 kHz modes. Its on-chip PLL derives internal clocks from LRCLK or MCLKI (6.9–13.8 MHz in PLL mode), eliminating need for high-frequency external master clocks.
It supports master/slave serial audio interfaces (I²S, left/right-justified, TDM) with independent DBCLK/DLRCLK and ABCLK/ALRCLK domains, four DAC data inputs (DSDATA1–4), two ADC data outputs (ASDATA1–2), and configurable SPI control (24-bit words, 10 MHz max CCLK) for register-level volume, mute, and filter control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ADC Resolution | 24 bits - Enables high-fidelity digitization of analog audio signals with >100 dB dynamic range. |
| DAC Dynamic Range | 108 dB (A-weighted, RMS) - Delivers ultra-low-noise analog output suitable for premium consumer audio playback. |
| THD + N (DAC) | −92 dB at 0 dBFS (2-channel active) - Ensures clean signal reproduction without audible distortion artifacts. |
| Sample Rate Support | 8–192 kHz - Covers legacy CD (44.1 kHz), DVD-Audio (96 kHz), and high-res streaming (192 kHz) formats. |
| Volume Control Step | 0.375 dB per step - Provides fine-grained, clickless attenuation adjustment across 95 dB total range. |
| Supply Voltage | 3.3 V AVDD/DVDD - Reduces EMI and power consumption versus 5 V codecs; tolerates 5 V logic inputs. |
| PLL Reference Input | MCLKI (6.9–13.8 MHz) or LRCLK - Enables flexible clock sourcing without external oscillator for cost-sensitive designs. |
Pinout & Package
ADAU1328BSTZ-RL is housed in a 48-lead LQFP package (7 mm × 7 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are validated per Analog Devices Rev. B datasheet Figure 2 and Table 9.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ADC1LP / ADC1LN / ADC1RP / ADC1RN ADC2LP / ADC2LN / ADC2RP / ADC2RN |
Differential analog inputs (4 per ADC) | Accept balanced line-level signals; require external 100 Ω series + 1 nF shunt RC filtering for optimal SNR. |
| OL1–OL4, OR1–OR4 | Analog DAC outputs (8 total) | Single-ended, 1.5 V common-mode, ±1.27 V p-p at 0 dBFS; require external third-order LPF before amplification. |
| MCLKI/XI, MCLKO/XO | Master clock I/O or crystal terminals | Supports direct MCLK input (up to 27.6 MHz) or crystal oscillator (e.g., 12.288 MHz) for PLL reference. |
| DSDATA1–4, ASDATA1–2, DBCLK, DLRCLK, ABCLK, ALRCLK |
Serial audio data/clock I/O | Enable TDM up to 16 channels or independent stereo streams; support I²S, left/right-justified, and TDM formats. |
| CIN/ADR0, COUT/SDA, CCLK/SCL, CLATCH/ADR1 |
SPI control interface | 24-bit command interface for real-time register writes; CLATCH latches address/data; standalone mode possible with pins grounded. |
| FILTR, CM, PD/RST, AGND, DGND | Reference, control, ground | FILTR requires 10 µF||100 nF bypass; CM supplies 1.5 V bias for external op-amps; PD/RST is active-low reset/power-down. |
Key Features
| Feature | Design Value |
|---|---|
| Low-EMI sigma-delta architecture | Eliminates need for high-frequency master clocks; reduces board-level radiated emissions in sensitive audio environments. |
| Differential ADC input with 100 dB CMRR | Rejects common-mode noise from long cable runs or noisy PCB layouts; maintains SNR in electrically hostile enclosures. |
| Logarithmic volume control with autoramp | Prevents audible clicks/pops during gain transitions; enables smooth fade-in/fade-out in software-controlled audio systems. |
| TDM-capable serial ports (up to 16 channels) | Reduces interconnect count in multi-zone audio systems; allows single-data-line routing for 7.1+ channel configurations. |
| Software-controllable clickless mute | Enables silent muting/unmuting via SPI write without hardware reconfiguration or signal interruption. |
Applications
| Home Theater Receivers | Set-Top Box Audio Processing |
|---|---|
Use Scenario: Multichannel analog output for 5.1/7.1 surround sound decoding and post-processing. IC Role / Device Role / Timing Role: Primary audio codec handling all DAC output and ADC return paths; synchronized via internal PLL locked to HDMI audio clock. Use Value: Single-chip solution eliminates discrete ADC/DAC arrays, reducing BOM count and layout complexity while maintaining 108 dB DAC SNR. |
Use Scenario: Audio I/O for IPTV and OTT media players with HDMI/SPDIF passthrough and analog line-out. IC Role / Device Role / Timing Role: Dual-role codec providing stereo DAC output for RCA jacks and stereo ADC input for microphone/audio-in features. Use Value: Supports simultaneous 192 kHz playback and 48 kHz recording with independent sample rate domains - no external SRC required. |
| Digital Audio Effects Processors | Professional Audio Interfaces |
Use Scenario: Real-time DSP-based reverb, EQ, and dynamics processing with analog I/O. IC Role / Device Role / Timing Role: High-precision ADC/DAC front-end for SHARC or SigmaDSP-based effects engines; clocked by internal PLL for jitter immunity. Use Value: 107 dB ADC SNR and −96 dB THD+N preserve signal integrity through multiple processing stages without degradation. |
Use Scenario: Compact USB/FireWire audio interface with 2-in/8-out analog capability for studio monitoring. IC Role / Device Role / Timing Role: Core conversion engine supporting TDM mode for 8-channel DAC output over single DBCLK/DLRCLK pair. Use Value: Enables 8-channel line-level output using only 3 PCB traces (data, bit clock, LR clock), simplifying high-density audio interface design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar audio codec applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AK4621VN | 24-bit, 192 kHz, 2 ADC/8 DAC, but uses 5 V analog supply and lacks integrated PLL; requires external clock generator. | Higher power consumption and larger external component count; less suitable for low-EMI, space-constrained designs. | Choose AK4621VN only if existing 5 V analog rail is fixed and external clock distribution is already implemented. |
| CS42888-CQZ | 24-bit, 192 kHz, 2 ADC/8 DAC with integrated PLL, but supports only I²S/TDM (no left/right-justified) and has lower 103 dB DAC SNR. | Limited format flexibility and 5 dB lower dynamic range affects high-end audio fidelity in critical listening environments. | CS42888-CQZ fits cost-sensitive consumer audio where full 108 dB performance is not required and I²S-only interface suffices. |
Compared with AK4621VN and CS42888-CQZ, ADAU1328BSTZ-RL uniquely combines 3.3 V operation, on-chip PLL, 108 dB DAC SNR, and full-format serial interface support - making it optimal for compact, low-EMI, high-fidelity multichannel audio systems requiring minimal external components.
Availability
ADAU1328BSTZ-RL is available at Aetrix Electronics and suitable for home theater receivers, set-top boxes, and digital audio effects processors requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across production batches.
Supply support for ADAU1328BSTZ-RL includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with decades of expertise in precision converters and audio technology.
The ADAU1328BSTZ-RL belongs to Analog Devices' SigmaDSP®-compatible audio codec family, designed specifically for high-fidelity, low-EMI consumer and professional audio systems requiring integrated clocking, flexible serial interfaces, and robust analog I/O performance.
FAQ
What is the maximum supported sample rate for ADAU1328BSTZ-RL?
The ADAU1328BSTZ-RL supports sample rates from 8 kHz up to 192 kHz across all ADC and DAC channels. At 192 kHz, the DAC interpolation filter operates at 128 × fS, and the ADC decimation filter maintains 79 dB stop-band attenuation. The device's PLL must be enabled for 192 kHz operation - direct MCLK mode is not supported at this rate.
Does ADAU1328BSTZ-RL require external passive components for ADC input filtering?
Yes, ADAU1328BSTZ-RL requires external 100 Ω series resistors and 1 nF shunt capacitors (NPO or polypropylene film) on each ADC differential input pin (e.g., ADC1LP/LN) to isolate the internal switched-capacitor sampling circuitry from external driving op-amps and prevent SNR degradation.
Can ADAU1328BSTZ-RL operate without an SPI microcontroller?
Yes, ADAU1328BSTZ-RL supports standalone mode: grounding CIN/ADR0, CCLK/SCL, and CLATCH/ADR1 at power-up configures default I²S stereo operation at 256 × fS with all registers initialized. In this mode, volume and mute are fixed; full functionality requires SPI control.
What is the purpose of the FILTR pin on ADAU1328BSTZ-RL?
The FILTR pin on ADAU1328BSTZ-RL provides access to the internal voltage reference (1.5 V nominal). It must be bypassed with a parallel 10 µF aluminum electrolytic and 100 nF ceramic capacitor to AGND, placed as close as possible to the pin, to stabilize the reference and ensure ADC/DAC accuracy and low-noise performance.
How many DAC channels does ADAU1328BSTZ-RL provide, and what is their output type?
ADAU1328BSTZ-RL provides eight DAC channels arranged as four stereo pairs (OL1/OR1 through OL4/OR4), all with single-ended analog outputs. Each output has a 1.5 V common-mode voltage and delivers ±1.27 V p-p at 0 dBFS, requiring external third-order low-pass filtering before connection to amplifiers or speakers.
ADAU1328BSTZ-RL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 48-LQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- General Purpose
- Data Interface:
- Serial
- Resolution (Bits):
- 24 b
- Number of ADCs / DACs:
- 2 / 8
- Sigma Delta:
- Yes
- S/N Ratio, ADCs / DACs (db) Typ:
- 94 / 94
- Dynamic Range, ADCs / DACs (db) Typ:
- 105 / 106
- Voltage - Supply, Analog:
- 3V ~ 3.6V
- Voltage - Supply, Digital:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-LQFP (7x7)
ADAU1328BSTZ-RL FAQ
1.How can I place an order for ADAU1328BSTZ-RL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADAU1328BSTZ-RL on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ADAU1328BSTZ-RL reliable?
The price and inventory of ADAU1328BSTZ-RL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADAU1328BSTZ-RL is usually 5 days.
3.What payment methods are accepted for ADAU1328BSTZ-RL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADAU1328BSTZ-RL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADAU1328BSTZ-RL?
ADAU1328BSTZ-RL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADAU1328BSTZ-RL order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ADAU1328BSTZ-RL?
For technical support, including ADAU1328BSTZ-RL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADAU1328BSTZ-RL requirements.
6.How does Aetrix verify that ADAU1328BSTZ-RL is sourced from the original manufacturer or authorized distributors?
All ADAU1328BSTZ-RL products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ADAU1328BSTZ-RL meets industry standards.
7.What is the process for return or replacement of ADAU1328BSTZ-RL?
All ADAU1328BSTZ-RL units undergo pre-shipment inspection (PSI). If there is an issue with ADAU1328BSTZ-RL, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ADAU1328BSTZ-RL part is unused and in its original packaging.
Return procedure for ADAU1328BSTZ-RL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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