content here.
content here.

SSM2305:  Filterless High Efficiency Mono 2.8 W Class-D Audio Amplifier

The SSM2305 features a high efficiency, low noise modulation scheme that does not require external LC output filters. The modu-lation provides high efficiency even at low output power. The SSM2305 operates with 90% efficiency at 1.3 W into 8 Ω or 83% efficiency at 2.2 W into 4 Ω from a 5.0 V supply and has an SNR of >98 dB. Spread-spectrum pulse density modulation is used to provide ...More

SSM2305:  Filterless High Efficiency Mono 2.8 W Class-D Audio Amplifier

Product Description

The SSM2305 features a high efficiency, low noise modulation scheme that does not require external LC output filters. The modu-lation provides high efficiency even at low output power. The SSM2305 operates with 90% efficiency at 1.3 W into 8 Ω or 83% efficiency at 2.2 W into 4 Ω from a 5.0 V supply and has an SNR of >98 dB. Spread-spectrum pulse density modulation is used to provide lower EMI-radiated emissions compared with other Class-D architectures.

The SSM2305 has a micropower shutdown mode with a maximum shutdown current of 30 nA. Shutdown is enabled by applying a Logic 0 to the SD pin. The device also includes pop-and-click suppression circuitry. This minimizes voltage glitches at the output during turn-on and turn-off, thus reducing audible noise on activation and deactivation.

The fully differential input of the SSM2305 provides excellent rejection of common-mode noise on the input. Input coupling capacitors can be omitted if the dc input common-mode voltage is approximately VDD/2.

The SSM2305 has excellent rejection of power supply noise, including noise caused by GSM transmission bursts and RF rectification. PSRR is typically 60 dB at 217 Hz.

The default gain of the SSM2305 is 18 dB, but users can reduce the gain by using a pair of external resistors.

The SSM2305 is specified over the commercial temperature range (−40°C to +85°C). It is available in both an 8-lead, 3 mm × 3 mm lead frame chip scale package (LFCSP) and an 8-lead mini small outline package (MSOP).

Applications

  • Mobile phones
  • MP3 players
  • Portable gaming
  • Portable electronics
  • Educational toys

    • RESOURCES & TOOLS

    What is your task? Try Lead the Way AdvisorTM BETA
    St

    TRAINING, TUTORIALS & SEMINARS

    Eb

    EVALUATION BOARDS & DEVELOPMENT KITS

    • Filterless Class-D amplifier with Σ-Δ modulation
    • No sync necessary when using multiple Class-D amplifiers from Analog Devices, Inc.
    • 2.8 W into 4 Ω load and 1.6 W into 8 Ω load at 5.0 V supply with <10% total harmonic distortion (THD)
    • 89% efficiency at 5.0 V, 1.3 W into 8 Ω speaker
    • >98 dB signal-to-noise ratio (SNR)
    • Single-supply operation from 2.5 V to 5.5 V
    • 20 nA ultralow shutdown current
    • Short-circuit and thermal protection
    • Please see data sheet for additional features
    • Output Power (W): 2.8W
    • Efficiency (%): 89%
    • SNR (dB): 98dB
    • THD+N (dB): +-94dB
    • Pos Supply: +2.5V to +5.5V
    • Supply Current : 3.3mA

    Functional Block Diagram for SSM2305

    Similar Products

    arrow View Full Interactive Product Selection Table
    Part# Output Power (W) Efficiency (%) Dynamic Range (dB) SNR (dB) THD+N (dB) Pos Supply Supply Current Price* (1000-4999)
    AD1990 5 84 102 102 -90 +8V to +12V 30mA -
    ADAU1513 23 90 96 96 - +9V to +18V 40mA $2.15
    ADAU1590 15.5 90 101 101 - +9V to +15V 65mA $2.24
    ADAU1592 18 87 101 101 -85 +9V to +18V 44mA $2.37
    SSM2301 1.4 85 - 98 - +2.5V to +5V 4.2mA $0.45
    SSM2302 2 85 - 98 -67 +2.5V to +5V - $0.92
    SSM2304 2 85 - 102 -67 +2.5V to +5V 7mA $0.81
    SSM2305 2.8 89 - 98 +-94 +2.5V to +5.5V 3.3mA $0.60
    SSM2306 2 87 - 96 - +2.5V to +5V 6.5mA $0.99
    SSM2311 3 85 - 98 -67 +2.5V to +5.5V 4.2mA $0.73
    SSM2315 3 93 - 103 - +2.5V to +5.5V 3.3mA $0.82
    SSM2317 3 93 - 93 - +2.5V to +5.5V 4.07mA $0.91
    SSM2319 3 90 - 98 - +2.5V to +5.5V 3.7mA $0.90
    SSM2335 3 93 - 96 - +2.5V to +5.5V 3.63mA $0.63
    back to top

    * The pricing listed here is provided only for budgetary purposes as recommended list price in U.S. Dollars in the United States ex factor per unit for the stated volume. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
    ** Pricing is currently unavailable. Click on the product number to see the Product Page for additional information.

    Pricing, Packaging & Availability

    Print Table
    back to top

    Help

    Model
    The model number is a specific version of a generic that can be purchased or sampled.

    Status
    Status indicates the current lifecycle of the product. This can be one of 4 stages:
    • Pre-Release: The model has not been released to general production, but samples may be available.
    • Production: The model is currently being produced, and generally available for purchase and sampling.
    • Last Time Buy: The model has been scheduled for obsolescence, but may still be purchased for a limited time.
    • Obsolete: The specific part is obsolete and no longer available. Other models listed in the table may still be available (if they have a status that is not obsolete).
    Package Description
    The package for this IC (i.e. DIP, SOIC, BGA). An Evaluation Board is a board engineered to show the performance of the model, the part is included on the board.

    For detailed drawings and chemical composition please consult our  Package Site

    Pin Count
    Pin Count is the number of pins, balls, or pads on the device. Pin-out diagrams & pin function descriptions may be found in the datasheet.

    Temperature Range
    This is the acceptable operating range of the device. The various ranges specified are as follows:
    • Commercial: 0 to +70 degrees Celsius
    • Military : -55 to +125 degrees Celsius
    • Industrial: Temperature ranges may vary by model. Please consult the datasheet for more information.
    • Automotive: -40 to +125 degrees Celsius
    Price
    The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

    Production Availability
    This is the date Analog Devices, Inc. anticipates that the product will ship from the warehouse. Most orders ship within 48 hours of this date.Once an order has been placed, Analog Devices, Inc. will send an Order Acknowledgement email to confirm your delivery date. It is important to note the scheduled dock date on the order entry screen. We do take orders for items that are not in stock, so delivery may be scheduled at a future date. Also, please note the warehouse location for the product ordered. We have warehouses in the United States, Europe and Southeast Asia. Transit times from these sites may vary.
    Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.

    RoHS Compliant
    Due to environmental concerns, ADI offers many of our products in lead-free versions. For more information about lead-free parts, please consult our Pb (Lead) free information page.

    View PCN
    This is the list of Product Change Notifications (PCN) published on the web for this model. Click on the link to access PCN Information.Only select pre-2009 PCN�s are available on-line. To obtain a pre-2009 PCN, contact your ADI Sales Rep. For more information on ADI's PCN process, please visit our PCN Policy Statement page

    *The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
    **Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.