GENERAL DESCRIPTION
The SSM2211 is a high-performance audio amplifier that delivers 1 W RMS of low distortion audio power into a bridge-connected 8 W speaker load, (or 1.5 W RMS into 4 W load). It operates over a wide temperature range and is specified for single-supply voltages between 2.7 V and 5.5 V. When operating from batteries, it will continue to operate down to 1.75 V. This makes the SSM2211 the best choice for unregulated applications such as toys and games. Featuring a 4 MHz bandwidth and distortion below 0.2 % THD @ 1 W, superior performance is delivered at higher power or lower speaker load impedance than competitive units.
The low differential dc output voltage results in negligible losses in the speaker winding, and makes high value dc blocking capacitors unnecessary. Battery life is extended by using the Shutdown mode, which reduces quiescent current drain to typically 100 nA.
The SSM2211 is designed to operate over the –20°C to +85°C temperature range. The SSM2211 is available in SO-8 and LFCSP (Lead Frame Chip Scale Package) surface mount packages. The SO-8 features the patented Thermal Coastline lead frame (see Figure 12). The advanced mechanical packaging of the SSM2211 ensures lower chip temperature and enhanced performance relative to standard packaging options. An evaluation board is available upon request of your local Analog Device sales office.
Applications include personal portable computers, hands-free telephones and transceivers, talking toys, intercom systems and other low voltage audio systems requiring 1 W output power.

FEATURES
  1.5 W Output1
  Differential (BTL2) Output
  Single-Supply Operation: 2.7 V to 5.5 V
  Functions Down to 1.75 V
  Wide Bandwidth: 4 MHz
  Highly Stable, Phase Margin: >80 Degrees
  Low Distortion: 0.2% THD @ 1 W Output
  Excellent Power Supply Rejection

APPLICATIONS
  Portable Computers
  Personal Wireless Communicators
  Hands-Free Telephones
  Speakerphones
  Intercoms
  Musical Toys and Speaking Games