SSM2380CBZ-REEL7

ANALOG DEVICES SSM2380CBZ-REEL7 Audio Power Amplifier, D, 2Channel, 4W, 2.5V to 5.5V, LCSP, 16Pins

Product Details

The SSM2380 is a fully integrated, high efficiency, stereo, Class-D audio amplifier. It is designed to maximize performance for mobile phone applications. The application circuit requires a minimum of external components and operates from a single 2.5 V to 5.5 V supply. It is capable of delivering 2 W of continuous output power with <1% THD + N driving a 4 Ω load from a 5.0 V supply.

The SSM2380 features a highly flexible I2C interface with many useful settings. Using the I2C control interface, the gain of the SSM2380 can be selected from 1 dB to 24 dB plus mute in 47 steps with no external components. Other features accessed from the I2C interface include independent left/right channel shutdown, variable ultralow EMI emission control mode, auto-matic level control ALC for high quality speaker protection, and stereo-to-mono mixing operation.

The SSM2380 features a high efficiency, low noise modulation scheme that requires no external LC output filters. The modulation continues to provide high efficiency even at low output power. The SSM2380 operates with 93% efficiency at 1.4 W into 8 Ω or with 85% efficiency at 2 W into 4 Ω from a 5.0 V supply and has an SNR of >100 dB.

Spread-spectrum pulse density modulation is used to provide lower EMI-radiated emissions compared with other Class-D architectures. An added benefit of spread-spectrum Σ-Δ modu-lation is that no synchronization SYNC is needed when using multiple Class-D amplifiers. For applications that require long speaker cables >10 cm, the SSM2380 includes a user-selectable ultralow EMI emissions mode that eliminates the need for EMI filters at the Class-D outputs.

The SSM2380 has a micropower shutdown mode with a typical shutdown current of 20 nA. Shutdown is enabled by applying a logic low to the SD pin or through an optional independent channel soft shutdown via I2C.

The device also includes pop-and-click suppression circuitry. This suppression circuitry minimizes voltage glitches at the output during turn-on and turn-off, reducing audible noise on activation and deactivation.

The fully differential inputs of the SSM2380 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 SSM2380 is specified over the commercial temperature range −40°C to +85°C. It has built-in thermal shutdown and output short-circuit protection. It is available in a 16-ball, 2 mm × 2 mm wafer level chip scale package WLCSP.

**Applications**

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Mobile phones

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MP3 players

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Portable electronics

### Features and Benefits

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Filterless, stereo, Class-D amplifier with Σ-Δ modulation

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2 W into 4 Ω load and 1.4 W into 8 Ω load at 5.0 V supply with <1% total harmonic distortion plus noise THD + N

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Highly configurable I2C interface for gain adjust, automatic level control ALC, and ultralow EMI emissions mode

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MODE pin can disable I2C interface for more traditional stereo amplifier configuration

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Stereo-to-mono mixer option via I2C control

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93% efficiency at 5.0 V, 1.4 W into 8 Ω speaker

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Signal-to-noise ratio SNR: >100 dB

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Single-supply operation from 2.5 V to 5.5 V

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Ultralow shutdown current: 20 nA

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Short-circuit and thermal protection

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Pop-and-click suppression

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Available in 16-ball, 2.0 mm × 2.0 mm WLCSP