SSM2306CPZ-REEL

Overview

The SSM2306CPZ-REEL is a fully integrated, high-efficiency Class-D stereo audio amplifier designed for portable applications. It operates from a single 2.5 V to 5.0 V supply and delivers up to 2 W into a 4 Ω load at 5.0 V with less than 10% THD+N. The device features ultralow idle current, >87% efficiency at 1.4 W into 8 Ω, and a signal-to-noise ratio better than 96 dB. It utilizes pulse-density modulation to minimize electromagnetic interference emissions. The amplifier includes built-in thermal shutdown, short-circuit protection, and pop-and-click suppression. It is available in a 16-lead, 3 mm × 3 mm LFCSP package.

Feature Summary

• Filterless Class-D architecture that eliminates the need for output filters by utilizing speaker inductance and natural filtering capabilities.
• Sigma-delta modulation scheme that reduces high-frequency spectral components and minimizes electromagnetic interference emissions.
• Micropower shutdown mode with typical current of 20 nA, activated by applying a logic low to the SD pin.
• Pop-and-click suppression architecture that minimizes voltage glitches during turn-on and turn-off to reduce audible noise.

Applications

• Mobile phones
• MP3 players
• Portable gaming devices
• Educational toys
• Notebook computers

Procurement Notes

Verify the specific ordering suffix (R2, REEL, or REEL7) against the manufacturer's Ordering Guide to confirm reel quantity and packaging configuration. Ensure the component meets RoHS compliance requirements as indicated by the Z suffix. Confirm the operating temperature range matches the commercial specification of −40°C to +85°C for the intended application environment.

Selection Notes

Select this amplifier for designs requiring minimal external components due to its fully integrated nature and filterless operation. Consider the 18 dB default fixed gain, which can be reduced using external resistors if lower amplification is needed. Evaluate the 2.5 V to 5.0 V single-supply operation to ensure compatibility with the system power rails. Verify that the 16-lead LFCSP package dimensions fit the PCB layout constraints.

Part Context

The SSM2306 belongs to Analog Devices' portfolio of Class-D audio amplifiers optimized for battery-powered portable electronics. It is part of the SSM23xx series, sharing architectural similarities with other models like the SSM2304 and SSM2380 but offering distinct channel configurations and power outputs tailored for stereo audio reproduction in compact form factors.

Replacement Considerations

SSM2306CPZ-R2

FAQ

Does the SSM2306 require input coupling capacitors?

Input coupling capacitors are optional if the DC input common-mode voltage is approximately VDD/2. They are required if the input signal is not biased within the 1.0 V to VDD − 1.0 V range or if high-pass filtering is needed.

How is the gain of the SSM2306 configured?

The device has a default fixed gain of 18 dB set by internal resistors. This gain can be reduced by connecting external resistors (REXT) to the input pins.