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Analog Devices Inc. AD1888JCP-REEL
- Part No.:
- AD1888JCP-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- CODECS
- Package:
- 48-VFQFN Exposed Pad, CSP
- Datasheet:
-
AD1888JCP-REEL.pdf
- Description:
- IC CODEC AUDIO-PC AC'97 48LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:127,500
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Product details
Overview
AD1888JCP-REEL from Analog Devices is an AC '97 2.3-compliant 6-channel audio codec IC with 20-bit DACs, 16-bit ADCs, integrated stereo headphone amplifiers, S/PDIF output, and jack-sense–enabled auto topology switching. It delivers 90 dB dynamic range, supports variable sample rates from 7 kHz to 96 kHz, and operates with dual supplies (5.0 V AVDD / 3.3 V DVDD) for PC audio subsystems.
For engineers reviewing the AD1888JCP-REEL datasheet, AD1888JCP-REEL pinout, AD1888JCP-REEL application, or AD1888JCP-REEL equivalent, key selection criteria include AC '97 interface timing compliance, 48-lead LQFP package compatibility, 5.1 surround channel routing, crystal-free operation capability, and software-controllable VREF_OUT for MIC biasing.
Technical Context
The AD1888JCP-REEL implements a full AC '97 2.3 digital audio controller interface with BIT_CLK (12.288 MHz), SYNC, SDATA_IN/OUT, and RESET signals. It integrates six independent 20-bit Σ-Δ DACs (front L/R, surround L/R, center, LFE), two 16-bit Σ-Δ ADCs (stereo line-in/CD/AUX/phone/MIC), and a programmable gain amplifier with selectable 0/10/20/30 dB MIC preamp stages.
Its analog signal chain includes antialiasing filters (AFILT1/AFILT2), voltage reference generation (VREF/VREFOUT), EAPD-controlled external amplifier power-down, and jack-sense logic (JS0/JS1) enabling automatic input/output reconfiguration. The on-chip PLL supports crystal-free operation using USB (48 MHz), oscillator (24.576 MHz), or reference clock (14.31818 MHz) inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| DAC Resolution | 20-bit Σ-Δ - enables 90 dB dynamic range and high-fidelity 5.1 audio playback |
| ADC Resolution | 16-bit Σ-Δ - provides 80 dB A-weighted dynamic range for line/mic capture |
| Sample Rate Range | 7 kHz to 96 kHz - supports voice, telephony, CD, and double-rate audio without external resampling |
| AC '97 Interface | Compliant with Rev. 2.3 - ensures interoperability with Intel chipset-based host controllers and standard BIOS drivers |
| Package | 48-lead LQFP - surface-mount footprint compatible with legacy PC motherboard layouts and automated assembly |
| Power Supplies | 5.0 V AVDD / 3.3 V DVDD - separates analog and digital domains to minimize noise coupling in mixed-signal PC audio paths |
| S/PDIF Output | Dedicated SPDIF_OUT pin - enables direct digital audio output to external receivers without additional transceivers |
Pinout & Package
AD1888JCP-REEL is housed in a 48-lead LQFP (7 mm × 7 mm, 0.5 mm pitch) package with exposed thermal pad. Pin 1 is marked by dot; pins are numbered counterclockwise. Analog and digital power/ground pins are segregated to suppress supply coupling; NC pins (12, 42) must remain unconnected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 9, 34, 38, 43 | DVDD1/DVDD2/AVDD4/AVDD2/AVDD3 | Digital/analog supply rails - require local 0.1 µF + 4.7 µF decoupling per rail pair |
| 4, 7, 26, 33, 40, 44 | DVSS1/DVSS2/AVSS1/AVSS4/AVSS2/AVSS3 | Digital/analog ground returns - must be connected to separate low-impedance ground planes |
| 35, 36, 31, 32, 37, 39, 41 | LINE_OUT_L/R, CENTER_OUT, LFE_OUT, MONO_OUT, SURR_OUT_L/R | 6-channel analog outputs - drive 10 kΩ line loads or 32 Ω headphones directly via integrated amps |
| 13–24 | PHONE_IN, AUX_L/R, CD_L/R, MIC1/MIC2, LINE_IN_L/R | Multi-source analog inputs - support simultaneous mic/line/CD capture with independent gain control |
| 16, 17 | JS0, JS1 | Jack sense inputs - detect plug insertion to auto-switch between front/rear MIC or headset/headphone modes |
| 27, 28 | VREF, VREFOUT | Reference filter and programmable MIC bias - VREFOUT supplies 2.25 V or 3.65 V (software-selectable) at 5 mA |
| 47 | EAPD | External amplifier power-down - open-drain output controls Class-D or AB amplifier enable/disable sequencing |
| 5, 6, 8, 10, 11 | SDATA_OUT, BIT_CLK, SDATA_IN, SYNC, RESET | AC '97 digital interface - requires strict 12.288 MHz BIT_CLK timing (±1 ppm) and setup/hold compliance |
Key Features
| Feature | Design Value |
|---|---|
| Crystal-free operation | Internal PLL accepts 48 MHz USB clock or 14.31818 MHz reference - eliminates external crystal and reduces BOM cost |
| Jack sense with auto topology switching | JS0/JS1 inputs detect plug presence and trigger register-based reconfiguration - enables single-board support for front-panel headset and rear-line-in |
| Software-controlled VREF_OUT | VREFOUT voltage set to 2.25 V (VREFH = 0) or 3.65 V (VREFH = 1) via Register 76h - matches bias requirements of diverse electret microphones |
| Auto down-mix and channel spreading | Hardware-accelerated stereo-to-surround conversion - reduces CPU load in media players and games without external DSP |
| Double-rate audio support (fS = 96 kHz) | Full 20-bit DAC path operates at 96 kHz - preserves high-frequency detail for studio-grade playback and professional audio workflows |
Applications
| Desktop PC Audio Subsystem | Legacy Industrial HMI Terminal |
|---|---|
|
Use Scenario: Integrated audio solution for ATX motherboards with front-panel headset jack, rear-line-in, and 5.1 speaker outputs. IC Role / Device Role / Timing Role: AC '97 codec interfacing directly to southbridge; handles all analog I/O, sample rate conversion, and jack-sense logic. Use Value: Eliminates need for discrete op-amps, level shifters, and clock generators - reduces component count by ≥12 parts versus discrete design. |
Use Scenario: Voice-guided operator interface in factory-floor HMIs requiring microphone input, speaker feedback, and line-level alarm tone output. IC Role / Device Role / Timing Role: Primary audio data converter and mixer; synchronizes voice capture/playback with PLC-triggered events via AC '97 frame-aligned timing. Use Value: 90 dB SNR and −80 dB crosstalk ensure clear speech intelligibility in noisy industrial environments without external filtering. |
| Embedded Telephony Gateway | CD-ROM Drive Audio Controller |
|
Use Scenario: Analog telephony interface in VoIP gateways supporting speakerphone, headset, and line-in for conferencing. IC Role / Device Role / Timing Role: Dual-role codec: ADC captures analog phone line (via MONO_OUT + PHONE_IN), DAC drives speaker/headset with echo cancellation support. Use Value: Integrated mono output and programmable MIC preamp (up to +30 dB) enable direct connection to telephone hybrid circuits - no external amplification needed. |
Use Scenario: High-fidelity CD audio extraction and playback in optical drive controllers with analog RCA outputs. IC Role / Device Role / Timing Role: Dedicated CD_L/CD_R differential input path with dedicated ground reference (CD_GND_REF) - optimized for low-noise CD player analog section. Use Value: 90 dB SNR on CD input path exceeds Red Book CD-DA specification (90 dB typical), ensuring bit-transparent analog reproduction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar AC '97 audio codec applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD1885JST | Same AC '97 2.3 core but lacks S/PDIF output and jack-sense logic; uses 48-lead LQFP with identical pinout except SPDIF/EAPD/JS pins repurposed | No hardware auto-switching between front/rear MIC; no digital audio passthrough to external receivers | Select AD1885JST only if S/PDIF and jack sense are unused - reduces cost where feature set can be trimmed |
| ALC655-VD | Realtek AC '97 2.3 codec with 18-bit DACs (85 dB DR), integrated PCI interface logic, and different register map; 48-lead LQFP but non-pin-compatible | Requires PCI bus enumeration and vendor-specific driver stack; lower dynamic range limits high-end audio fidelity | Choose ALC655-VD only for cost-sensitive consumer PCs where driver availability and Windows compatibility outweigh SNR requirements |
Compared with AD1888JCP-REEL, AD1885JST removes S/PDIF and jack-sense functionality while retaining identical power, timing, and AC '97 interface behavior; ALC655-VD trades analog performance and register compatibility for integrated PCI control and broader OS driver support.
Availability
AD1888JCP-REEL is available at Aetrix Electronics and suitable for desktop PC motherboard designs, industrial HMI terminals, embedded telephony gateways, and CD-ROM drive audio controllers requiring stable component supply and long-term obsolescence management.
Supply support for AD1888JCP-REEL 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and consumer markets since 1965.
The AD1888JCP-REEL belongs to Analog Devices' SoundMAX® AC '97 codec family, engineered specifically for PC platform audio integration with emphasis on low-noise analog front-ends, flexible digital interface compliance, and system-level power management.
FAQ
What is the primary interface standard supported by the AD1888JCP-REEL?
The AD1888JCP-REEL implements the AC '97 2.3 specification, providing a standardized 3-wire digital audio interface (BIT_CLK, SYNC, SDATA_IN/OUT) compatible with Intel southbridge controllers and legacy PC BIOS audio stacks. It does not support I²S, PCM, or USB audio natively - all digital communication occurs exclusively over the AC '97 link.
Does the AD1888JCP-REEL require an external crystal oscillator?
No - the AD1888JCP-REEL supports crystal-free operation via its integrated PLL, which accepts 48 MHz USB clock, 24.576 MHz oscillator, or 14.31818 MHz reference clock inputs. When using the XTAL_IN/XTAL_OUT pins, a 24.576 MHz fundamental-mode crystal is required; omission of the crystal is valid if an external clock source is provided.
How many independent analog output channels does the AD1888JCP-REEL provide?
The AD1888JCP-REEL provides six independent analog output channels: LINE_OUT_L/R (front), SURR_OUT_L/R (surround), CENTER_OUT, and LFE_OUT - fully compliant with 5.1 surround sound routing. Additionally, it offers MONO_OUT for telephony and SURR_OUT_L/R double-function as HP_OUT_L/R with integrated 32 Ω drive capability.
What is the function of the VREFOUT pin on the AD1888JCP-REEL?
VREFOUT on the AD1888JCP-REEL is a software-programmable voltage reference output used primarily to bias electret microphones. It delivers either 2.25 V (VREFH = 0) or 3.65 V (VREFH = 1), selectable via Bit D15 (VREFH) in Register 76h, with up to 5 mA drive current - eliminating need for external bias regulators in MIC input circuits.
Can the AD1888JCP-REEL simultaneously capture audio from both MIC1 and MIC2 inputs?
Yes - the AD1888JCP-REEL supports concurrent capture from MIC1 (rear panel) and MIC2 (front panel) through independent programmable gain amplifier paths. Register 0Eh configures MIC1 gain, while MIC2 gain is controlled via the same register with M20 bit selection; both channels feed the stereo ADC and can be mixed or routed separately in software.
AD1888JCP-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- SoundMAX®
- Package/Case:
- 48-VFQFN Exposed Pad, CSP
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Audio Codec '97
- Data Interface:
- Serial
- Resolution (Bits):
- 16, 20 b
- Number of ADCs / DACs:
- 2 / 6
- Sigma Delta:
- No
- S/N Ratio, ADCs / DACs (db) Typ:
- -
- Dynamic Range, ADCs / DACs (db) Typ:
- 80 / 90
- Voltage - Supply, Analog:
- 4.75V ~ 5.25V
- Voltage - Supply, Digital:
- 3.15V ~ 3.45V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-LFCSP-VQ (7x7)
AD1888JCP-REEL FAQ
1.How can I place an order for AD1888JCP-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD1888JCP-REEL 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 AD1888JCP-REEL reliable?
The price and inventory of AD1888JCP-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD1888JCP-REEL is usually 5 days.
3.What payment methods are accepted for AD1888JCP-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD1888JCP-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD1888JCP-REEL?
AD1888JCP-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD1888JCP-REEL 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 AD1888JCP-REEL?
For technical support, including AD1888JCP-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD1888JCP-REEL requirements.
6.How does Aetrix verify that AD1888JCP-REEL is sourced from the original manufacturer or authorized distributors?
All AD1888JCP-REEL 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 AD1888JCP-REEL meets industry standards.
7.What is the process for return or replacement of AD1888JCP-REEL?
All AD1888JCP-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD1888JCP-REEL, 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 AD1888JCP-REEL part is unused and in its original packaging.
Return procedure for AD1888JCP-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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