MAX9700 Maxim, MAX9700 Datasheet
MAX9700
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MAX9700 Summary of contents
Page 1
... The gain of the MAX9700 is set internally (MAX9700A: 6dB, MAX9700B: 12dB, MAX9700C: 15.6dB, MAX9700D: 20dB), further reducing external component count. The MAX9700 features high 72dB PSRR, a low 0.01% THD+N, and SNR in excess of 90dB. Short-circuit and thermal-overload protection prevent the device from damage during a fault condition. The MAX9700 is avail- ...
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... +25°C.) (Notes CONDITIONS V Inferred from PSRR test +25° Either input BIAS MAX9700A MAX9700B A V MAX9700C MAX9700D T = +25° MIN A MAX f = 1kHz, input referred 2.5V to 5.5V +25° 217Hz RIPPLE 200mV ...
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ELECTRICAL CHARACTERISTICS (continued) = SHDN = 3.3V, GND = PGND = 0V, SYNC = GND (FFM unless otherwise noted. Typical values are at T MIN MAX PARAMETER SYMBOL Signal-to-Noise Ratio ...
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Low-EMI, Filterless, Class D Audio Amplifier (V = 3.3V, SYNC = GND (SSM +25°C, unless otherwise noted TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY + 0.1 P ...
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SYNC = GND (SSM +25°C, unless otherwise noted TOTAL HARMONIC DISTORTION PLUS NOISE vs. COMMON-MODE VOLTAGE 3. 1kHz P = 300mW OUT DIFFERENTIAL ...
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... FREQUENCY (Hz) WIDEBAND OUTPUT SPECTRUM (SSM MODE) 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 1M 10M 100M FREQUENCY (Hz) 6 _______________________________________________________________________________________ Typical Operating Characteristics (continued) MAX9700 toc19 -20 500mV/div -40 -60 -80 -100 100 V/div -120 -140 DUTY CYCLE = 88 OUTPUT FREQUENCY SPECTRUM 0 SSM MODE V = -60dBV OUT -20 ...
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... 0.04 0.02 0 2.5 3.5 4.0 4.5 5.0 5 (A1) (B4 SHDN UVLO/POWER CLICK-AND-POP OSCILLATOR MANAGEMENT SUPPRESSION IN+ CLASS D MODULATOR IN- MAX9700 GND PGND 7 4 (B3) (C2) SHUTDOWN SUPPLY CURRENT vs. SUPPLY VOLTAGE 3.0 3.5 4.0 4.5 5.0 5.5 SUPPLY VOLTAGE (V) Functional Diagram 6 (A3) SYNC (A4) OUT+ PGND ...
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... Amplifier-Output Positive Phase Amplifier-Output Negative Phase H-Bridge Power Supply DD The MAX9700 features two FFM modes. The FFM modes are selected by setting SYNC = GND for a 1.1MHz switching frequency, and SYNC = FLOAT for a 1.45MHz switching frequency. In FFM mode, the fre- quency spectrum of the class D output consists of the ...
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... Applying an external TTL clock of 800kHz to 2MHz to SYNC synchronizes the switching frequency of the MAX9700. The period of the SYNC clock can be ran- domized, enabling the MAX9700 to be synchronized to another MAX9700 operating in SSM mode. Filterless Modulation/Common-Mode Idle The MAX9700 uses Maxim’ ...
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... OUT+ OUT- Figure 2. MAX9700 Output with an Input Signal Applied (SSM Mode) the load voltage, resulting in finite load current, increasing power consumption. When no signal is pre- sent at the input of the MAX9700, the outputs switch as shown in Figure 4. Because the MAX9700 drives the speaker differentially, the two outputs cancel each other, resulting in no net Idle Mode™ ...
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... V OUT OUT Figure 4. MAX9700 Outputs with No Input Signal Shutdown Figure 5. MAX9700 Efficiency vs. Class AB Efficiency Because the frequency of the MAX9700 output is well beyond the bandwidth of most speakers, voice coil movement due to the square-wave frequency is very DD small. Although this movement is small, a speaker not designed to handle the additional power can be dam- aged ...
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... The MAX9700 does not require an output filter. The device passes FCC emissions standards with 100mm of unshielded speaker cables. However, output filtering ...
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... Figure 8. Master-Slave THD+N ______________________________________________________________________________________ 1.2W, Low-EMI, Filterless, Class D Audio Amplifier Two MAX9700s can be configured as a stereo amplifier (Figure 7). Device U1 is the master amplifier; its unfil- tered output drives the SYNC input of the slave device (U2), synchronizing the switching frequencies of the two devices. Synchronizing two MAX9700s ensures that no beat frequencies occur within the audio spectrum ...
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... The potentiometer is audio taper Figure 10a. This significantly improves transient performance on power-up or release from SHDN. A similar approach can be applied when the MAX9700 is driven differentially and a volume con- trol is required 50k 1 F Figure 10a ...
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... OUT IN+ SHDN PGND PV B IN- GND OUT- C UCSP ______________________________________________________________________________________ 1.2W, Low-EMI, Filterless, Class D Audio Amplifier IN+ MAX9700 IN- SHDN CODEC/ BASEBAND PROCESSOR SHDN 1 F INL 1 F MAX9722 INR C1P CIN 1 F TRANSISTOR COUNT: 3595 PROCESS: BiCMOS 4 DD System Diagram PV DD OUT+ ...
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... Low-EMI, Filterless, Class D Audio Amplifier (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) 16 ______________________________________________________________________________________ Package Information PACKAGE OUTLINE, 4x3 UCSP 1 F 21-0104 1 ...
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... For the latest package outline information go to www.maxim-ic.com/packages.) D PIN 1 INDEX AREA NUMBER OF LEADS SHOWN ARE FOR REFERENCE ONLY ______________________________________________________________________________________ 1.2W, Low-EMI, Filterless, Class D Audio Amplifier Package Information (continued) ...
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... Low-EMI, Filterless, Class D Audio Amplifier (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) COMMON DIMENSIONS SYMBOL MIN. MAX. A 0.70 0.80 D 2.90 3.10 E 2.90 3.10 A1 0.00 0.05 L 0.20 0.40 k 0.25 MIN. A2 0.20 REF. PACKAGE VARIATIONS PKG. CODE ...
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... D1 FRONT VIEW Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 19 © ...