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AD1990ACPZRL 데이터시트(PDF) 1 Page - Analog Devices

부품명 AD1990ACPZRL
상세설명  Audio Switching Amplifier
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홈페이지  http://www.analog.com
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Audio Switching Amplifier
AD1990
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
101 dB dynamic range (A-weighted)
2 × 5 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 AD1990 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 12 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
AD1990
Figure 1.


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