The SSM2306 is a fully integrated, high efficiency, Class-D stereo audio amplifier designed to maximize performance for portable applications. The application circuit requires minimum external components and operates from a single 2.5 V to 5.0 V supply. It is capable of delivering 2 W of continuous output power with less than 10% THD + N driving a 4 Ω load from a 5.0 V supply.

The SSM2306 features ultralow idle current, high efficiency, and a low noise modulation scheme. It operates with >87% efficiency at 1.4 W into 8 Ω from a 5.0 V supply and has a signal-to-noise ratio (SNR) that is better than 96 dB. PDM modulation offers lower EMI radiated emissions compared to other Class-D architectures.

The SSM2306 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 architecture of the device allows it to achieve a very low level of pop and click to minimize voltage glitches at the output during turn-on and turn-off, thereby reducing audible noise on activation and deactivation. The fully differential input of the SSM2306 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 V_DD/2.

The SSM2306 also has excellent rejection of power supply noise, including noise caused by GSM transmission bursts and RF rectification.

The SSM2306 has a preset gain of 18 dB that can be reduced by using external resistors.

The SSM2306 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-lead, 3 mm × 3 mm lead frame chip scale package (LFCSP).

Applications

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

Part#	Output Power (W)	Speaker Driver	Headphone Driver	Micophone Driver	Product Description	Price* (1000-4999)
AD8541	-	-	-	-	Rail-Rail Input/Output, Low Power, Single/Supply, CMOS Amplifier	$0.27
AD8542	-	-	-	-	Dual, Rail-Rail Input/Output, Low Power, Single/Supply, CMOS Amplifier	$0.38
AD8544	-	-	-	-	Quad, Rail-Rail Input/Output, Low Power, Single/Supply, CMOS Amplifier	$0.53
ADAU1592	18	-	-	-	-	$3.62
SSM2167	-	-	-	Mono	Microphone Driver withe Noise Gate	$1.19
SSM2211	1.5	Mono	-	-	Mono Speaker Driver	$0.44
SSM2250	1.5	Mono	Stereo	-	Mono Speaker and Stereo Headphone Driver	$0.99
SSM2301	1.4	-	-	-	-	$0.32
SSM2302	2	-	-	-	-	$0.91
SSM2304	2	-	-	-	-	$0.62
SSM2306	2	-	-	-	-	$0.69
SSM2311	3	-	-	-	-	$0.72
SSM2315	3	Mono	-	-	-	$0.81

* 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.

The model number is a specific version of a generic that can be purchased or sampled.

Status indicates the current lifecycle of the product. This can be one of 4 stages:

• Pre-Release: The model has not been released to general production, but samples may be available.
• Production: The model is currently being produced, and generally available for purchase and sampling.
• Last Time Buy: The model has been scheduled for obsolescence, but may still be purchased for a limited time.
• Obsolete: The specific part is obsolete and no longer available. Other models listed in the table may still be available (if they have a status that is not obsolete).

The package for this IC (i.e. DIP, SOIC, BGA). An Evaluation Board is a board engineered to show the performance of the model, the part is included on the board.

For detailed drawings and chemical composition please consult our  Package Site

Pin Count is the number of pins, balls, or pads on the device. Pin-out diagrams & pin function descriptions may be found in the datasheet.

This is the acceptable operating range of the device. The various ranges specified are as follows:

• Commercial: 0 to +70 degrees Celsius
• Military : -55 to +125 degrees Celsius
• Industrial: Temperature ranges may vary by model. Please consult the datasheet for more information.
• Automotive: -40 to +125 degrees Celsius

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

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.

Due to environmental concerns, ADI offers many of our products in lead-free versions. For more information about lead-free parts, please consult our Pb (Lead) free information page.