GENERAL DESCRIPTION
The SSM2319 is a fully integrated, high efficiency 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 3 W of continuous output power with <1% THD + N driving a 3 Ω load from a 5.0 V supply.
The SSM2319 features a high efficiency, low noise modulation scheme that does not require any external LC output filters. The modulation continues to provide high efficiency even at low output power. It operates with 90% efficiency at 1.4 W into 8 Ω or 85% efficiency at 3 W into 3 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.
SYNC can be activated in the event that end users are concerned about clock intermodulation (beating effect) of several amplifiers in close proximity.
The SSM2319 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.
The device also includes pop-and-click suppression circuitry. This minimizes voltage glitches at the output during turn-on and turn-off, reducing audible noise on activation and deactivation.
The default gain of the SSM2319 is 12 dB, but users can reduce the gain by using a pair of external resistors (see the Gain section).
The SSM2319 is specified over the industrial temperature range of −40°C to +85°C. It has built-in thermal shutdown and output short-circuit protection. It is available in a 9-ball, 1.5 mm × 1.5 mm wafer level chip scale package (WLCSP).

FEATURES
*Filterless Class-D amplifier with ultraefficient spread-spectrum Σ-Δ modulation
*Internal modulator synchronization (SYNC)
*3 W into 3 Ω load and 1.4 W into 8 Ω load at 5.0 V supply with <1% total harmonic distortion (THD)
*90% efficiency at 5.0 V, 1.4 W into 8 Ω speaker
*Signal-to-noise ratio (SNR): 98 dB
*Single-supply operation: 2.5 V to 5.5 V
*Ultralow shutdown current: 20 nA
*Short-circuit and thermal protection with autorecovery
*Available in 9-ball, 1.5 mm × 1.5 mm WLCSP
*Pop-and-click suppression
*Built-in resistors reduce board component count
*Default fixed 12 dB or user-adjustable gain setting

APPLICATIONS
*Mobile phones
*MP3 players
*Portable gaming
*Portable electronics
*Educational toys

SSM2319CBZ-R2, SSM2319CBZ-REEL, SSM2319CBZ-REEL7, EVAL-SSM2319Z

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GENERAL DESCRIPTION
The SSM2335 is a fully integrated, high efficiency, 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 3 W of continuous output power with <1% THD + N driving a 3 Ω load from a 5.0 V supply.
The SSM2335 features a high efficiency, low noise modulation scheme that requires no external LC output filters. The modu-lation continues to provide high efficiency even at low output power. It operates with 93% efficiency at 1.4 W into 8 Ω or 85% efficiency at 3 W into 3 Ω from a 5.0 V supply and has an SNR of >96 dB. Spread-spectrum pulse density modulation is used to provide lower EMI-radiated emissions compared with other Class-D architectures.
The SSM2335 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.
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 input of the SSM2335 provides excellent rejection of common-mode noise on the input. Input coupling capacitors can be omitted if the input dc common-mode voltage is approximately VDD/2.
The default gain of the SSM2335 is 18 dB, but users can reduce the gain by using a pair of external resistors (see the Gain section).
The SSM2335 is specified over the industrial temperature range of −40°C to +85°C. It has built-in thermal shutdown and output short-circuit protection. It is available in a 9-ball, 1.5 mm × 1.5 mm wafer level chip scale package (WLCSP).

FEATURES
*Filterless Class-D amplifier with Σ-Δ modulation
*No sync necessary when using multiple Class-D amplifiers from Analog Devices, Inc.
*3 W into 3 Ω load and 1.4 W into 8 Ω load at 5.0 V supply with <1% total harmonic distortion (THD + N)
*93% efficiency at 5.0 V, 1.4 W into 8 Ω speaker
*>96 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
*Available in 9-ball, 1.5 mm × 1.5 mm WLCSP
*Pop-and-click suppression
*Built-in resistors reduce board component count
*Default fixed 18 dB or user-adjustable gain setting

APPLICATIONS
Mobile phones
MP3 players
Portable gaming
Portable electronics
Educational toys

SSM2335CBZ-R2, SSM2335CBZ-REEL, SSM2335CBZ-REEL7, EVAL-SSM2335Z

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