The SSM6322 is an integrated, dual-channel audio amplifier solution that interfaces directly with audio DAC/CODEC, maximizing the fidelity of high fidelity audio signal chains. The highly efficient design of the SSM6322 delivers outstanding audio performance while minimizing power dissipation for maximum battery life in portable applications.
The SSM6322 features −121 dB THD + N at 1 kHz, along with very low output noise from 20 Hz to 20 kHz. The low power operation, high peak output current, and high PSRR make the SSM6322 an ideal candidate for applications that require high fidelity audio, high dynamic range, precision, and low power. This highly integrated drive solution also reduces development time while reducing board space and minimizing external components.
The SSM6322 is available in a 24-lead LFCSP package. The SSM6322 operates over the industrial temperature of −40°C to +85°C.
Applications
High fidelity headphone driver
Mobile phones
Bluetooth speakers & headphones
Gaming Notebooks and Tablets
A/V receivers
Professional audio equipment
Audio test equipment
Automobile infotainment system
### Features and Benefits
Flexible architecture to interface with all digital-to-analog converters (DACs)
Accepts differential current or voltage input (provides single-ended voltage output)
High output current drive capability
Greater than 100 mA rms output current
Accurately reproduces large music transients into heavy loads (16 Ω to 32 Ω)
Excellent audio fidelity
−121 dB total harmonic distortion plus noise (THD + N) at 1 kHz, 2 V rms output with ±5 V supply and 32 Ω load
Low output integrated noise (10 Hz to 22 kHz) of 1.8 μV rms with A-weighted filter
Supply range: ±3.3 V to ±6 V (typical)
Low power operation
Enabled: 60 mW, VCC = +5 V, VEE = −5 V
Disabled/voice select: <30 μA
Low power disable mode with high output impedance
High-Z in power-down mode eliminating voice mode switch from the high fidelity path
Greater than 87 dB power supply rejection ratio (PSRR) at 20 kHz
Adjustable input common-mode voltage with resistor programmable reference voltage
1.45 V (typical) with no external components
Capable of two single-pole, low-pass filters in series
2.2 nF maximum input capacitor
Second filter between the GAINx and FILTx pins
Pop and click noise suppression
Signal chain integration supports small printed circuit board (PCB) area
