MAX9700 1.2W, Low-EMI, Filterless, Class D Audio Amplifier Electrical Characteristics (continued) ( VDD = PVDD = VSHDN = 3.3V , VGND = VPGND = 0V, SYNC = GND (FFM), RL = 8Ω, RL connected between OUT+ and OUT-, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Notes 1, 2) PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS BW = 22Hz FFM 89 to 22kHz SSM 87 Signal-to-Noise Ratio SNR VOUT = 2VRMS dB FFM 92 A-weighted SSM 90 SYNC = GND 980 1100 1220 SYNC = unconnected 1280 1450 1620 Oscillator Frequency fOSC kHz SYNC = VDD (SSM mode) 1220 ±120 SYNC Frequency Lock Range 800 2000 kHz Efficiency η POUT = 500mW, fIN = 1kHz 94 % DIGITAL INPUTS (SHDN, SYNC) V Input Thresholds IH 2 V VIL 0.8 SHDN Input Leakage Current ±1 µA SYNC Input Current ±5 µA Electrical Characteristics ( VDD = PVDD = VSHDN = 5V , VGND = VPGND = 0V, SYNC = GND (FFM), RL = 8Ω, RL connected between OUT+ and OUT-, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Notes 1, 2) PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS Quiescent Current IDD 5.2 mA Shutdown Current ISHDN 0.1 µA Common-Mode Rejection Ratio CMRR f = 1kHz, input referred 72 dB f = 217Hz 72 Power-Supply Rejection Ratio PSRR 200mVP-P ripple dB f = 20kHz 55 RL = 16Ω 700 Output Power POUT THD+N = 1% RL = 8Ω 1200 mW RL = 6Ω 1600 Total Harmonic Distortion RL = 8Ω, POUT = 125mW 0.015 Plus Noise THD+N f = 1kHz, either FFM or SSM % RL = 4Ω, POUT = 125mW 0.02 BW = 22Hz to FFM 92.5 22kHz SSM 90.5 Signal-to-Noise Ratio SNR VOUT = 3V dB RMS FFM 95.5 A-weighted SSM 93.5 Note 1: All devices are 100% production tested at TA = +25°C. All temperature limits are guaranteed by design. Note 2: Testing performed with a resistive load in series with an inductor to simulate an actual speaker load. For RL = 4Ω, L = 33μH. For RL = 8Ω, L = 68μH. For RL = 16Ω, L = 136μH. Note 3: PSRR is specified with the amplifier inputs connected to GND through CIN. www.maximintegrated.com Maxim Integrated │ 3
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