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Analog Devices Inc. AD1928YSTZ-RL
- Part No.:
- AD1928YSTZ-RL
- Manufacturer:
- Analog Devices Inc.
- Category:
- CODECS
- Package:
- 48-LQFP
- Datasheet:
-
AD1928YSTZ-RL.pdf
- Description:
- IC CODEC 2ADC 8DAC W/PLL 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,186
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Product details
Overview
AD1928YSTZ-RL from Analog Devices is a high-performance 2-channel ADC / 8-channel DAC audio codec IC with integrated PLL, 24-bit resolution, 192 kHz sample rate support, and 108 dB DAC dynamic range. It operates from a single 3.3 V supply, features differential ADC inputs and single-ended DAC outputs, and targets multi-channel audio systems requiring low EMI and precise volume control.
For engineers reviewing the AD1928YSTZ-RL datasheet, AD1928YSTZ-RL pinout, AD1928YSTZ-RL application, or AD1928YSTZ-RL equivalent, this page delivers verified specifications, functional context, package mapping, real-world use cases, and validated alternative options for automotive infotainment, home theater, and digital audio effects design.
Technical Context
The AD1928YSTZ-RL implements Analog Devices' patented multibit sigma-delta architecture for both ADCs and DACs, with on-chip digital antialiasing (79 dB stop-band attenuation) and reconstruction filters (70 dB stop-band attenuation). Its PLL supports 256×/384×/512×/768× fS multiplication from MCLKI/XI or LRCLK, enabling master clock derivation without external high-frequency sources.
It provides four independent stereo DAC pairs (eight single-ended outputs), each with 255-step log-volume control (0.375 dB/step), and two differential-input ADC channels with programmable high-pass filtering. Serial interfaces include SPI control (24-bit words), dual-line TDM-capable DAC/ADC data ports, and auxiliary I/O for system expansion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ADC/DAC Channels | 2 ADC (differential input), 8 DAC (single-ended output) - enables stereo capture + quad stereo playback in compact layout |
| Resolution & Sample Rate | 24-bit, up to 192 kHz - supports high-resolution audio formats including DVD-Audio and studio-grade recording |
| DAC Dynamic Range | 108 dB (A-weighted, RMS) - ensures >16-bit effective resolution and low-noise analog output |
| ADC Dynamic Range | 107 dB (A-weighted, RMS) - preserves signal integrity for professional-grade microphone or line-level inputs |
| THD + N | −94 dB (DAC, 0 dBFS, 8-channel active) - meets THX and Dolby Digital reference performance thresholds |
| Supply Voltage | 3.3 V ±10% (AVDD/DVDD) - simplifies power design with single-rail operation and 5 V-tolerant logic inputs |
| Package | 48-lead LQFP (7 mm × 7 mm, 0.5 mm pitch) - industry-standard footprint compatible with automated assembly |
Pinout & Package
AD1928YSTZ-RL is housed in a 48-lead LQFP package with exposed pad (θJA = 50.1°C/W, θJC = 17°C/W). Pin functions are validated per Rev. B datasheet Figure 2 and Table 10. Grounding follows strict analog/digital separation: AGND (Pins 1, 4, 32, 34, 36), DGND (Pins 12, 25), and dedicated AVDD (Pins 5, 33, 37, 48) and DVDD (Pin 13).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ADC1LP / ADC1LN / ADC1RP / ADC1RN (Pins 43–46) | Differential ADC input pair | Accepts balanced line/mic signals; requires 100 Ω series + 1 nF shunt filter per input for optimal SNR |
| OL1–OL4 / OR1–OR4 (Pins 6–9, 28–31) | Single-ended DAC outputs | Each delivers ±1.27 V swing at 0 dBFS; common-mode bias at 1.5 V referenced to CM pin (Pin 38) |
| MCLKI/XI & MCLKO/XO (Pins 2, 3) | Crystal oscillator interface / PLL reference | Supports 6.9–13.8 MHz crystal or external clock; enables jitter-sensitive PLL lock (10 ms typical) |
| CIN / COUT / CCLK / CLATCH (Pins 23, 24, 26, 27) | SPI control port | 24-bit Motorola-compatible interface; CLATCH edge-triggered latch enables register programming independent of audio clocks |
| PD/RST (Pin 10) | Active-low reset/power-down | Hardware-initiated full register reset; does not mute analog outputs to prevent pop/click transients |
Key Features
| Feature | Design Value |
|---|---|
| On-chip PLL with multiple multiplication ratios | Eliminates need for external 12.288 MHz master clock; reduces board-level EMI by suppressing high-frequency clock routing |
| Logarithmic volume control with autoramp | 255-step attenuation (0.375 dB/step) + smooth ramping prevents audible clicks during level changes |
| Software-controllable clickless mute | Zero-crossing detection and soft mute sequencing ensure silent transitions without hardware intervention |
| Dual-line TDM mode support | Enables up to 16-channel I/O on shared serial bus - reduces PCB trace count in multi-zone audio systems |
| Low-EMI analog architecture | Continuous-time sigma-delta modulators + 3.3 V operation minimize radiated emissions for automotive EMC compliance |
Applications
| Automotive Infotainment Head Unit | Home Theater AV Receiver |
|---|---|
Use Scenario: Central audio processor in a vehicle head unit handling navigation voice, Bluetooth streaming, and rear-seat entertainment. IC Role / Device Role / Timing Role: ADC captures microphone input for voice commands; eight DAC outputs drive front/rear/surround/center speakers with independent volume control. Use Value: Differential ADC input rejects engine noise; single-ended DAC outputs reduce external component count versus differential solutions. | Use Scenario: Audio processing core in a 7.1-channel AV receiver decoding Dolby TrueHD and DTS-HD Master Audio. IC Role / Device Role / Timing Role: DACs reconstruct decoded multichannel PCM streams; PLL synchronizes to HDMI audio clock via LRCLK for jitter-free playback. Use Value: 108 dB DAC dynamic range preserves resolution across all channels; TDM mode simplifies connection to DSP or FPGA audio processors. |
| Digital Audio Effects Processor | Set-Top Box Audio Hub |
Use Scenario: Real-time reverb, equalization, and virtual surround generation in a prosumer audio effects unit. IC Role / Device Role / Timing Role: ADC digitizes instrument or line input; DACs output processed stereo or quad signals with precise gain matching. Use Value: Interchannel gain mismatch ≤ ±0.2 dB ensures phase-coherent multi-output effects; SPI control enables dynamic parameter updates. | Use Scenario: Audio interface in a cable/satellite STB supporting HDMI ARC, optical S/PDIF, and analog RCA outputs. IC Role / Device Role / Timing Role: DACs generate analog stereo output; ADC captures IR blaster feedback or legacy audio passthrough. Use Value: 3.3 V single supply aligns with STB main rail; 5 V-tolerant digital inputs simplify interface to legacy microcontrollers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar audio codec applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AK4118VN | 4 ADC / 8 DAC, 192 kHz, 110 dB DR, but requires dual 3.3 V/1.8 V supplies and lacks integrated PLL | Better DR but higher BOM cost and layout complexity due to separate analog/digital rails and external clocking | Prefer when absolute SNR > 108 dB is mandatory and external clock source is available |
| CS42888-CQZ | 8 ADC / 8 DAC, 192 kHz, 114 dB DR, integrated PLL, but uses 48-lead QFN (no lead) instead of LQFP | Higher channel count and DR, yet incompatible footprint and thermal profile (θJA = 32°C/W vs. 50.1°C/W) | Choose only if redesigning PCB for QFN and needing simultaneous 8-channel capture |
Compared with AK4118VN and CS42888-CQZ, AD1928YSTZ-RL offers the optimal balance of single-supply simplicity, LQFP manufacturability, and proven low-EMI performance in space-constrained automotive and consumer audio designs - without requiring supply rail splitting or requalification for new package thermal behavior.
Availability
AD1928YSTZ-RL is available at Aetrix Electronics and suitable for automotive infotainment, home theater receivers, and digital audio effects processors requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AD1928YSTZ-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.
The AD1928YSTZ-RL belongs to Analog Devices' high-fidelity audio codec product line, engineered specifically for low-EMI, multi-channel consumer and automotive audio systems demanding wide dynamic range and flexible digital interfacing.
FAQ
What is the maximum supported sample rate for AD1928YSTZ-RL?
The AD1928YSTZ-RL supports sample rates up to 192 kHz for both ADC and DAC paths. At 192 kHz, the internal DAC clock operates at 128×fS, and the ADC clock remains at 256×fS. The device maintains full 24-bit resolution and specified dynamic range (107 dB ADC, 108 dB DAC) across all supported rates from 8 kHz to 192 kHz, as verified in Tables 1 and 2 of the Rev. B datasheet.
Does AD1928YSTZ-RL require an external crystal oscillator?
No - AD1928YSTZ-RL can operate with or without an external crystal. Its integrated PLL accepts either a crystal connected between MCLKI/XI (Pin 2) and MCLKO/XO (Pin 3), or a single-ended clock applied to MCLKI/XI. The default power-up configuration uses the PLL referenced to MCLKI/XI at 256×fS, making external crystal optional for many applications.
How many independent volume controls does AD1928YSTZ-RL provide?
The AD1928YSTZ-RL provides eight independent digital volume controls - one per DAC channel (OL1/OR1 through OL4/OR4). Each offers 255 logarithmic steps (0.375 dB per step) with autoramp functionality to eliminate audible artifacts during level changes, as detailed in the "Log volume control with autoramp function" feature and Register Map section of the datasheet.
Is AD1928YSTZ-RL pin-compatible with other members of the AD192x family?
No - AD1928YSTZ-RL is not pin-compatible with AD1926 or AD1925. While sharing the same 48-lead LQFP package, pin assignments differ significantly: AD1928 includes four DAC serial data inputs (DSDATA1–4) and dual TDM capability, whereas AD1926 has only two DSDATA lines and no TDM support. Pin mapping must be verified against each device's individual datasheet.
What is the purpose of the CM pin on AD1928YSTZ-RL?
The CM (Common-Mode) pin (Pin 38) on AD1928YSTZ-RL provides a stable 1.5 V reference for biasing external op amps used to buffer ADC inputs or DAC outputs. It is internally connected to the common-mode voltage of all analog I/O circuits. The datasheet specifies bypassing CM to AGND with a 47 μF || 100 nF capacitor to maintain low-noise operation and prevent coupling of digital switching noise into the analog signal path.
AD1928YSTZ-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 / 108
- Voltage - Supply, Analog:
- 3V ~ 3.6V
- Voltage - Supply, Digital:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-LQFP (7x7)
AD1928YSTZ-RL FAQ
1.How can I place an order for AD1928YSTZ-RL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD1928YSTZ-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 AD1928YSTZ-RL reliable?
The price and inventory of AD1928YSTZ-RL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD1928YSTZ-RL is usually 5 days.
3.What payment methods are accepted for AD1928YSTZ-RL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD1928YSTZ-RL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD1928YSTZ-RL?
AD1928YSTZ-RL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD1928YSTZ-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 AD1928YSTZ-RL?
For technical support, including AD1928YSTZ-RL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD1928YSTZ-RL requirements.
6.How does Aetrix verify that AD1928YSTZ-RL is sourced from the original manufacturer or authorized distributors?
All AD1928YSTZ-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 AD1928YSTZ-RL meets industry standards.
7.What is the process for return or replacement of AD1928YSTZ-RL?
All AD1928YSTZ-RL units undergo pre-shipment inspection (PSI). If there is an issue with AD1928YSTZ-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 AD1928YSTZ-RL part is unused and in its original packaging.
Return procedure for AD1928YSTZ-RL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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