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
    Td

    TECHNICAL DOCUMENTATION

    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

    类似产品

    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.

    价格、封装以及购买

    打印表
    back to top

    Help

    产品型号
    产品型号是指能够购买或者索取样片的某类产品的具体型号。

    产品状态
    产品状态指该产品当前的生存周期。它指下面四个阶段之一：
    • 预发布：该产品型号尚未投入正式生产，但是可以提供样片。
    • 生产：该产品型号目前已在生产，可以购买和索取样片。
    • 停产前限时购买：该型号已经计划停产，但仍然可以在限定的时间内购买。
    • 停产：该型号产品已经停产，不再提供。本表格中列出的其它型号产品仍可以供货（如果这些型号不处于停产状态）。
    封装说明
    这种集成电路（IC）的封装说明，例如：DIP，SOIC和BGA封装。评估板是一块用来演示器件性能的试验板，该器件也包含在该评估板上。

    欲详细了解封装图和化学成份请访问：  封装网页

    引脚数
    引脚数是指该器件的引脚、球状焊点或焊盘的数量。产品技术资料中提供引脚排列图和引脚功能描述。

    温度范围
    这是指该器件允许的工作温度范围。以下为所规定的三种温度范围：
    • 民用温度范围：0 ºC～＋70 ºC
    • 军用温度范围：－55ºC ～＋125ºC
    • 工业用温度范围：不同型号的产品的温度范围可能不同。欲了解更多信息，请查阅产品技术资料。
    • 汽车工作温度范围：-40 ℃～ +125 ℃
    报价
    这里所列出的美国报价单仅供预算参考，指美元报价（规定订量的每片美元，美国离岸价），如有修改不再另行通知。由于地区关税、商业税、汇率及手续费原因，国际报价可能不同。对于特殊批量报价，请与您当地的ADI公司办事处或代理商联络。对于评估板和套件的报价是指一个单位价格。

    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.

    无铅封装产品
    ADI公司由于对应用环境的考虑，提供许多无铅（Pb）封装产品。欲获知更多关于无铅封装产品的信息，请访问我们的 Pb 无铅（Pb）封装产品网页。

    View PCN
    这是有关这款型号的产品变更通知(PCN)列表。点击链接以查看PCN详情。如需了解ADI PCN过程的更多信息，请访问我们的 PCN政策声明页面。

    *这里所列出的美国报价单仅供预算参考，指美元报价（规定订量的每片美元，美国离岸价），如有修改不再另行通知。由于地区关税、商业税、汇率及手续费原因，国际报价可能不同。对于特殊批量报价，请与您当地的ADI公司办事处或代理商联络。对于评估板和套件的报价是指一个单位价格。
    **样片供货情况可能好于生产供货，请将样片放入购物车，以查看样片供货情况。