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MAX9770 Datasheet(PDF) 3 Page - Maxim Integrated Products |
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MAX9770 Datasheet(HTML) 3 Page - Maxim Integrated Products |
3 / 24 page 1.2W Low-EMI, Filterless, Mono Class D Amplifier with Stereo DirectDrive Headphone Amplifiers _______________________________________________________________________________________ 3 ELECTRICAL CHARACTERISTICS (continued) (VDD = PVDD = CPVDD = 3.3V, GND = PGND = CPGND = 0V, SHDN = 3.3V, C1 = C2 = 1µF, CBIAS = 0.047µF, SYNC = GND, RL = ∞, speaker load connected between OUT+ and OUT-, headphone load connected between HPOUT_ and GND, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Notes 1, 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Signal-to-Noise Ratio SNR RL = 8 Ω, VOUT = 2VRMS, A-weighted 85.9 dB SYNC = GND 980 1100 1220 SYNC = FLOAT 1280 1450 1620 Output Switching Frequency FS SYNC = VDD 1220 ±120kHz kHz SYNC Frequency Lock Range 800 2000 kHz Efficiency η PO = 1000mW, f = 1kHz 85 % GAIN1 = 0, GAIN2 = 0 6 GAIN1 = 0, GAIN2 = 1 3 GAIN1 = 1, GAIN2 = 0 9 Gain AV GAIN1 = 1, GAIN2 = 1 0 dB Gain Accuracy ±5% Speaker Path Off-Isolation HPS = VDD, headphone amplifier active, f = 1kHz 102 dB HEADPHONE AMPLIFIER (GAIN1 = 1, GAIN2 = 0, HPS = VDD ) Output Offset Voltage VOS ±5 ±10 mV VDD = 2.5V to 5.5V 65 76 VRIPPLE = 200mVP-P, f = 217kHz 85 VRIPPLE = 200mVP-P, f = 1kHz 82 Power-Supply Rejection Ratio PSRR (Note 3) VRIPPLE = 200mVP-P, f = 20kHz 56 dB RL = 32 Ω 40 55 VDD = 3.3V RL = 16 Ω 40 RL = 32 Ω 60 Output Power POUT f = 1kHz, THD+N = 1% VDD = 5V RL = 16 Ω 80 mW RL = 32 Ω, POUT = 50mW, f = 1kHz 0.015 Total Harmonic Distortion Plus Noise THD+N RL = 16 Ω, POUT = 35mW, f = 1kHz 0.03 % Signal-to-Noise Ratio SNR RL = 32 Ω, VOUT = 300mVRMS, BW = 22Hz to 22kHz 101 dB Crosstalk Between channels, f = 1kHz, VIN = 200mVP-P 80 dB Headphone Off-Isolation HPS = GND, speaker amplifier active, f = 1kHz 96 dB |
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