Products > Integrated Circuits (ICs) > Amplifier ICs > SSM3525BCBZRL
  • SSM3525BCBZRL 0
  • SSM3525BCBZRL 1
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Manufacturer :
Analog Devices, Inc
Package/Case :
Product Categories :
Linear - Amplifiers - Audio
RoHs Status:
Pb-free Halide free

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SSM3525BCBZRL Product Details

The SSM3525BCBZRL is a fully integrated, high efficiency, mono Class D audio amplifier with digital input and digitized output of output voltage, output current, and PVDD supply. The application circuit requires few external components and can operate from 4.5 V to 17 V (PVDD) and 1.8 V (IOVDD) supplies. It is capable of delivering 8.3 W of continuous output power into an 8 Ω load (or 15.3 W into 4 Ω) with <1% THD + N from a 12 V supply, or 30.2 W into an 4 Ω load from a 17 V power supply, all with <1% THD + N.

The SSM3525BCBZRL features a high efficiency, low noise modulation scheme that requires no external inductor/capacitor (LC) output filters. This scheme continues to provide high efficiency even at low output power. It operates with 92% efficiency at 9W into an 8 Ω load, 12V or 89% efficiency at 20 W into 4 Ω from a 17 V supply, (should now match the table)and it has an signal-to-noise ratio (SNR) of 107 dB A weighted.

Spread spectrum pulse density modulation provides lower electromagnetic interference (EMI) radiated emissions compared with other Class-D architectures, particularly above 100 MHz.

The digital input eliminates the need of an external digital-to-analog converter (DAC). The SSM3525BCBZRL has a micropower shutdown mode with a typical shut¬down current of 90 nA at 12 V PVDD supply. Individual sense blocks can be powered down to save power when sense is not needed.

The device also includes pop and click suppression circuitry that minimizes voltage glitches at the output during turn on and turn off.

Current sensing is accomplished using an integrated analog-to-digital converter (ADC) and internal sense resistor. The digitized voltage and current information can be returned in various serial audio formats, including I2S, time division multiplexing (TDM) and pulse density modulation (PDM).

The SSM3525BCBZRL includes an integrated regulator to generate the required 5 V analog supply. Alternatively, if an external 5 V rail from a dc-to-dc converter is available, it can improve system efficiency.

The SSM3525BCBZRL is designed to operate with an I2C control interface and specified over the temperature range −40°C to +85°C. It has built-in thermal shutdown and output short-circuit protection. It is available in a halide free, 23-ball, 2.26 mm × 2.38 mm wafer-level chip scale package (WLCSP).


  • Filterless digital input, mono Class D amplifier with Σ-Δ modulation
  • Digitized output of output voltage, output current, and PVDD supply voltage
  • Operates from 4.5 V to 17 V supply, such as a 2- or 3-cell battery
  • Input/output supply operation from 1.1 V to 1.98 V
  • 30.2 W output power, 17 V supply and 4 Ω load at 1% THD+N
  • 37.5 μV rms noise, 107 dB A weighted signal-to-noise ratio
  • I2C control with up to 4 pin selectable addresses 
  • Multiple serial data formats
    • TDM, I2S, or left justified slave
    • PDM input/output operating from 2.048 MHz to 6.144 MHz 
  • Support sample rates from 8 kHz to 192 kHz
  • Flexible digital and analog gain adjustment 
  • AGC with battery voltage-based limiter 
  • 74 dB SNR on output current sensing and 85 dB SNR on voltage sensing
  • 6.62 mA quiescent current at 12 V PVDD supply
  • Temperature sensor with 1°C readout
  • Short-circuit, thermal protection, and thermal warning
  • 23-ball, 2.26 mm × 2.38 mm ,0.4 mm pitch WLCSP
  • Pop and click suppression
  • User-selectable ultralow EMI emissions mode
  • Power-on reset


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  • Portable electronics

SSM3525BCBZRL Pinout
(Picture: Pinout)

SSM3525BCBZRL Block Diagram
(Picture: Diagram)

Technical Parameters

Type Class D Mounting Type Surface Mount
Output Type 1-Channel (Mono) Operating Temperature -40??C ~ 85??C (TA)
Max Output Power x Channels @ Load 30.2W x 1 @ 4Ohm, 15.2W x 2 @ 8Ohm Supplier Device Package 23-WLCSP (2.22x2.34)
Voltage Supply 4.5V ~ 17V Package / Case 23-UFBGA, WLCSP
Features Depop, Differential Inputs, I2C, Mute, Short-Circuit and Thermal Protection, Shutdown, Volume Control

SSM3525BCBZRL Documents

  • SSM3525 Technical Documentation/Data sheet

SSM3525BCBZRL Related Products

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Analog Devices, Inc. was founded by two MIT graduates, Ray Stata and Matthew Lorber in 1965. The same year, the company released its first product, the model 101 op amp, which was a hockey-puck sized...

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