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Analog Devices Inc. SSM2604CPZ-REEL
- Part No.:
- SSM2604CPZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- CODECS
- Package:
- 20-WFQFN Exposed Pad, CSP
- Datasheet:
-
SSM2604CPZ-REEL.pdf
- Description:
- IC AUDIO CODEC LP 20-LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:4,069
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Product details
Overview
SSM2604CPZ-REEL from Analog Devices is a low-power, 24-bit stereo audio codec IC for portable digital audio systems, integrating dual Σ-Δ ADCs and DACs, programmable-gain line inputs (−34.5 dB to +33 dB), and I²S/PCM/DSP digital audio interface. It operates from 1.5 V digital and 1.8 V analog supplies, delivers 100 dB DAC SNR (A-weighted) at 48 kHz, and supports sampling rates up to 96 kHz - enabling high-fidelity playback and recording in space-constrained mobile devices.
For engineers reviewing the SSM2604CPZ-REEL datasheet, SSM2604CPZ-REEL pinout, SSM2604CPZ-REEL application, or SSM2604CPZ-REEL equivalent, key selection considerations include its 20-lead LFCSP package, master/slave clocking flexibility (MCLK/XTI with crystal support), USB-mode 12 MHz/24 MHz compatibility, and integrated digital de-emphasis and ADC high-pass filtering for real-time signal conditioning.
Technical Context
The SSM2604CPZ-REEL implements oversampling Σ-Δ architecture for both ADC and DAC paths, with configurable 256×/384× oversampling in normal mode and 250×/272× in USB mode. Its digital core derives all timing from MCLK (8–13.8 MHz), supporting internal crystal oscillator operation via MCLK/XTI–XTO pins or external clock injection.
It features dual independent 24-bit data paths: left/right line inputs feed into PGA-controlled ADCs with A-weighted 90 dB SNR; converted data is filtered, formatted, and output on RECDAT/RECLRC/BCLK; conversely, PBDAT/PBLRC/BCLK deliver playback data to DACs with 100 dB A-weighted SNR and −80 dB THD+N at 3.3 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| DAC SNR (A-weighted) | 100 dB at 48 kHz, 3.3 V - enables high-resolution playback with minimal quantization noise in battery-powered audio systems |
| ADC SNR (A-weighted) | 90 dB at 48 kHz, 3.3 V - supports clean recording of line-level sources without audible background hiss |
| Power consumption | 7 mW stereo playback (1.8 V/1.5 V) - extends battery life in MP3 players and portable gaming devices |
| Sampling rates | 8–96 kHz - covers legacy (8/11.025/12 kHz) and HD audio (44.1/48/88.2/96 kHz) standards in single device |
| PGA gain range | −34.5 dB to +33 dB in 1.5 dB steps - allows precise input level matching across diverse line sources without external amplification |
| Digital interface modes | I²S, left/right-justified, DSP/PCM - ensures interoperability with ARM SoCs, DSPs, and microcontrollers using standard audio peripherals |
| Operating temperature | −40°C to +85°C - qualified for industrial-grade portable electronics including ruggedized educational toys and field-deployed devices |
Pinout & Package
SSM2604CPZ-REEL is housed in a 20-lead, 4 mm × 4 mm lead frame chip scale package (LFCSP) with exposed thermal pad connected to PCB ground. Pin 20 is NC; the center thermal pad must be soldered to a solid ground plane for thermal and EMI performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| MCLK/XTI | Digital Input | Accepts master clock (8–13.8 MHz) or crystal input - determines all internal sampling and filter timing; jitter ≤50 ps required for optimal SNR |
| XTO | Digital Output | Crystal oscillator output - used only when internal oscillator is enabled; must connect to external crystal with proper load capacitance |
| BCLK | Digital I/O | Bit clock for digital audio interface - direction (input/output) depends on master/slave mode; minimum 50 ns pulse width required |
| PBDAT / RECDAT | Digital I/O / Output | PBDAT: serial DAC data input (playback); RECDAT: serial ADC data output (record) - MSB-first, 16–32 bit word length supported |
| PBLRC / RECLRC | Digital I/O | Frame clock for left/right channel separation - synchronous with BCLK; defines sample boundary for time-multiplexed stereo data |
| LLINEIN / RLINEIN | Analog Input | Single-ended stereo line inputs - internally biased to VMID; full-scale input = 1.0 Vrms at AVDD = 3.3 V; impedance varies with PGA gain setting |
| LOUT / ROUT | Analog Output | Fixed-gain line outputs - drive 10 kΩ || 50 pF loads; held at VMID during standby to eliminate pop/click artifacts |
| VMID | Analog Output | Midrail bias voltage (AVDD/2) - requires 1 µF decoupling capacitor to AGND; critical for ADC/DAC common-mode stability and distortion performance |
Key Features
| Feature | Design Value |
|---|---|
| Dual 24-bit Σ-Δ converters | Enables simultaneous high-fidelity record+playback at 96 kHz with >90 dB SNR - eliminates need for separate ADC/DAC chips in compact designs |
| Programmable PGA (−34.5 dB to +33 dB) | Per-channel gain control in 1.5 dB steps - adapts to varying source levels (e.g., consumer line-out vs. professional mixer output) without external op-amps |
| Digital de-emphasis filters | Configurable per sampling rate (32/44.1/48 kHz) - corrects pre-emphasized CD/DVD audio streams in real time, reducing post-processing CPU load |
| ADC high-pass filter (3.7–21.6 Hz corner) | Removes DC offset and subsonic noise from line inputs - prevents saturation in downstream digital processing and improves dynamic range utilization |
| USB-mode clocking (12/24 MHz) | Direct compatibility with USB audio class clocks - simplifies integration into USB-connected headsets, dongles, and PC peripherals without external PLLs |
Applications
| Mobile Handset Audio Subsystem | Portable Media Player Baseband |
|---|---|
|
Use Scenario: Integrated audio path in GSM/WCDMA smartphones handling headset mic input, speaker playback, and FM radio audio routing. IC Role / Device Role / Timing Role: Stereo codec providing ADC for mono mic + stereo line-in, DAC for stereo speaker/headphone output, and I²S interface to baseband processor. Use Value: Low 7 mW playback power extends talk time; 1.5 V digital supply matches modern AP voltage rails; 20-pin LFCSP minimizes PCB footprint in tight antenna zones. |
Use Scenario: Audio front-end in flash-based MP3 players with SD card storage, OLED display, and Li-ion battery. IC Role / Device Role / Timing Role: Central audio converter managing SD card playback (DAC), line-in recording (ADC), and headphone output mixing. Use Value: 100 dB DAC SNR ensures transparent audio quality; USB-mode 12 MHz clocking enables direct connection to USB charging ports for firmware updates. |
| Educational STEM Audio Kit | Handheld Gaming Console Audio |
|
Use Scenario: Modular audio experiment board for students learning digital signal processing, filter design, and real-time audio I/O. IC Role / Device Role / Timing Role: Teaching platform for sampling theory, de-emphasis implementation, and I²S protocol analysis via register-level control. Use Value: Full register map access via I²C allows hands-on exploration of gain, mute, bypass, and filter settings; −40°C to +85°C rating supports classroom-to-field deployment. |
Use Scenario: Audio subsystem in battery-powered handheld game console with stereo speakers, microphone, and vibration feedback sync. IC Role / Device Role / Timing Role: Simultaneous voice capture (ADC), game audio playback (DAC), and real-time audio-triggered haptics via GPIO-synchronized events. Use Value: 90 dB ADC SNR captures clear voice commands; programmable PGA accommodates both headset mic and built-in mic sensitivity; 256× oversampling reduces aliasing in fast-paced audio effects. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar stereo audio codec applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AK4556VN | 24-bit stereo codec with 94 dB DAC SNR, 1.8–3.6 V supplies, but no integrated crystal oscillator - requires external clock source | Lacks XTO/MCLK oscillator circuitry; supports fewer sampling rates (up to 48 kHz only) and no USB-mode clocking | Choose AK4556VN only if system already provides low-jitter 12.288 MHz clock and USB audio is not required |
| TLV320AIC3106IRHBT | 24-bit codec with 102 dB DAC SNR, integrated LDOs, and enhanced headphone driver (25 mW into 16 Ω), but larger 32-pin QFN package | Includes Class-G headphone amp and flexible power management; consumes ~15 mW playback at 1.8 V - higher than SSM2604CPZ-REEL's 7 mW | Prefer TLV320AIC3106IRHBT when driving headphones directly is needed and PCB area permits 32-pin layout |
Compared with AK4556VN and TLV320AIC3106IRHBT, the SSM2604CPZ-REEL uniquely balances ultra-low power (7 mW), crystal-integrated clocking, USB-mode support, and compact 20-pin LFCSP - making it optimal for size- and battery-constrained portable audio where external clock generation is undesirable.
Availability
SSM2604CPZ-REEL is available at Aetrix Electronics and suitable for mobile phones, portable media players, handheld gaming consoles, and educational STEM kits requiring stable component supply across production lifecycles.
Supply support for SSM2604CPZ-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The SSM2604CPZ-REEL belongs to Analog Devices' low-power audio codec product line, engineered specifically for portable digital audio applications demanding high fidelity, minimal power, and small form factor - such as smartphones, MP3 players, and battery-operated consumer electronics.
FAQ
What is the maximum sampling rate supported by the SSM2604CPZ-REEL?
The SSM2604CPZ-REEL supports audio sampling rates from 8 kHz up to 96 kHz in both normal and USB modes. This includes standard rates like 44.1 kHz (CD), 48 kHz (DVD), and high-resolution rates such as 88.2 kHz and 96 kHz - all implemented via programmable dividers from the MCLK input, with no external PLL required. The SSM2604CPZ-REEL maintains full 24-bit resolution and specified SNR/THD+N performance across this entire range.
Does the SSM2604CPZ-REEL require an external crystal oscillator?
No - the SSM2604CPZ-REEL integrates a crystal oscillator circuit. When a crystal is connected between MCLK/XTI and XTO pins, the device self-oscillates at the crystal frequency (e.g., 12.288 MHz for 48 kHz sampling). Alternatively, an external clock can be driven directly into MCLK/XTI, and the internal oscillator can be disabled via the OSC bit (Register R6, Bit D5) to reduce power. The SSM2604CPZ-REEL thus offers flexible clocking without mandatory external components.
How does the bypass path function in the SSM2604CPZ-REEL?
The SSM2604CPZ-REEL's bypass path routes analog line inputs (LLINEIN/RLINEIN) directly to line outputs (LOUT/ROUT) without ADC/DAC conversion, controlled by the BYPASS bit (Register R4, Bit D3). This analog pass-through preserves signal integrity and latency for applications like audio monitoring or auxiliary loopback, while maintaining the same gain and DC bias as the PGA stage. The SSM2604CPZ-REEL does not attenuate or amplify the bypass signal - its level matches the PGA output at the selected gain setting.
What is the purpose of the VMID pin on the SSM2604CPZ-REEL?
The VMID pin on the SSM2604CPZ-REEL provides a stable mid-supply reference voltage (AVDD/2) for internal analog circuitry, including ADC/DAC biasing and input/output common-mode levels. It must be decoupled to AGND with a minimum 1 µF ceramic capacitor to ensure low-noise operation and prevent distortion. Failure to properly decouple VMID results in increased THD+N and reduced SNR - the SSM2604CPZ-REEL specification assumes correct VMID implementation per the datasheet layout guidelines.
Can the SSM2604CPZ-REEL operate from a single 1.8 V supply?
No - the SSM2604CPZ-REEL requires separate analog (AVDD) and digital (DVDD) supplies, each independently configurable within their rated ranges: AVDD = 1.8 V to 3.6 V, DVDD = 1.5 V to 3.6 V. While both may be set to 1.8 V, they must be isolated by dedicated LDOs or filtering to prevent digital noise coupling into the analog path. The SSM2604CPZ-REEL specifies 7 mW playback power only when AVDD = 1.8 V *and* DVDD = 1.5 V - mixing supply voltages outside this combination increases current draw.
SSM2604CPZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 20-WFQFN Exposed Pad, CSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Stereo Audio
- Data Interface:
- Serial
- Resolution (Bits):
- 24 b
- Number of ADCs / DACs:
- 2 / 2
- Sigma Delta:
- No
- S/N Ratio, ADCs / DACs (db) Typ:
- 90 / 100
- Dynamic Range, ADCs / DACs (db) Typ:
- -
- Voltage - Supply, Analog:
- 1.8V ~ 3.6V
- Voltage - Supply, Digital:
- 1.5V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-LFCSP (4x4)
SSM2604CPZ-REEL FAQ
1.How can I place an order for SSM2604CPZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for SSM2604CPZ-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 SSM2604CPZ-REEL reliable?
The price and inventory of SSM2604CPZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SSM2604CPZ-REEL is usually 5 days.
3.What payment methods are accepted for SSM2604CPZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SSM2604CPZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SSM2604CPZ-REEL?
SSM2604CPZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SSM2604CPZ-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 SSM2604CPZ-REEL?
For technical support, including SSM2604CPZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SSM2604CPZ-REEL requirements.
6.How does Aetrix verify that SSM2604CPZ-REEL is sourced from the original manufacturer or authorized distributors?
All SSM2604CPZ-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 SSM2604CPZ-REEL meets industry standards.
7.What is the process for return or replacement of SSM2604CPZ-REEL?
All SSM2604CPZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with SSM2604CPZ-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 SSM2604CPZ-REEL part is unused and in its original packaging.
Return procedure for SSM2604CPZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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