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AD1992ACPZRL7 Fiches technique(PDF) 1 Page - Analog Devices |
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AD1992ACPZRL7 Fiches technique(HTML) 1 Page - Analog Devices |
1 / 20 page Audio Switching Amplifier AD1992 Rev. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2006 Analog Devices, Inc. All rights reserved. FEATURES Integrated stereo modulator and power stage <0.002% THD + N 102 dB dynamic range (A-weighted) 2 × 10 W output power (4 Ω, <0.01% THD + N) RDS-ON < 0.3 Ω (per transistor) PSRR > 65 dB On-off-mute pop noise suppression EMI optimized modulator Short-circuit protection Overtemperature protection Low cost DMOS process APPLICATIONS Advanced televisions Compact multimedia systems Minicomponents GENERAL DESCRIPTION The AD1992 is a 2-channel, bridge tied load (BTL), switching audio power amplifier with integrated Σ-Δ modulator. The modulator accepts a single-ended, analog input signal and converts it to a switching waveform to drive speakers directly. A digital, microprocessor-compatible interface provides control of reset, mute, and PGA gain, as well as feedback signals for thermal and overcurrent error conditions. The output stage can operate over a power supply voltages range of 8 V to 20 V. The analog modulator and digital logic operate from a 5 V supply. FUNCTIONAL BLOCK DIAGRAM B2 B1 A2 A1 OUTL+ LEVEL SHIFTER AND DEAD TIME CONTROL H-BRIDGE PGND OUTL– OUTR+ OUTR– D2 D1 C2 C1 Σ-Δ MODULATOR Σ-Δ MODULATOR PGA PGA OSCILLATOR VOLTAGE REFERENCE MODE CONTROL LOGIC AND POP/CLICK SUPPRESSION AGND CLKI CLKO REF_FILT AINR AINL PVDD AVDD DVDD PGA1 PGA0 FEEDBACK NETWORK FEEDBACK NETWORK AD1992 Figure 1. |
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