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Copyright
Cirrus Logic, Inc. 2010
(All Rights Reserved)
MARCH '10
DS792F2
Low Power, Stereo DAC w/Headphone & Speaker Amps
FEATURES
98 dB Dynamic Range (A-wtd)
88 dB THD+N
Headphone Amplifier - GND Centered
–
No DC-Blocking Capacitors Required
–
Integrated Negative Voltage Regulator
–
2 x 23 mW into Stereo 16
Ω @ 1.8 V
–
2 x 44 mW into Stereo 16
Ω @ 2.5V
Stereo Analog Input Passthrough Architecture
–
Analog Input Mixing
–
Analog Passthrough with Volume Control
Digital Signal Processing Engine
–
Bass & Treble Tone Control, De-Emphasis
–
PCM Input w/Independent Vol Control
–
Master Digital Volume Control and Limiter
–
Soft-Ramp & Zero-Cross Transitions
Programmable Peak-Detect and Limiter
Beep Generator w/Full Tone Control
–
Tone Selections Across Two Octaves
–
Separate Volume Control
–
Programmable On and Off Time Intervals
–
Continuous, Periodic, One-Shot Beep
Selections
Class D Stereo/Mono Speaker Amplifier
No External Filter Required
High Stereo Output Power at 10% THD+N
–
2 x 1.00 W into 8
Ω @ 5.0 V
–
2 x 550 mW into 8
Ω @ 3.7 V
–
2 x 230 mW into 8
Ω @ 2.5 V
High Mono Output Power at 10% THD+N
–
1 x 1.90 W into 4
Ω @ 5.0 V
–
1 x 1.00 W into 4
Ω @ 3.7 V
–
1 x 350 mW into 4
Ω @ 2.5 V
Direct Battery Powered Operation
–
Battery Level Monitoring & Compensation
81% Efficiency at 800 mW
Phase-Aligned PWM Output Reduces Idle
Channel Current
Spread Spectrum Modulation
Low Quiescent Current
+1.60 V to +5.25 V
Battery
+1.65 V to +2.63 V
Digital Supply
Pulse-Width
Modulator
Battery Level Monitoring & Compensation
Multi-bit
ΔΣ DAC
Le
ve
lS
h
if
te
r
+1.65 V to +3.47 V
Interface Supply
Control
Po
rt
S
e
ri
al
A
u
d
io
Port
Beep
Generator
Digital Volume,
Mono Mix,
Limiter, Bass,
Treble Adjust
Left
Inputs
Σ
4
3
2
1
Summing
Amplifiers
Left HP/Line
Output
Ground-Centered
Amps
Right HP/Line
Output
+1.65 V to +2.63 V
Headphone Supply
Speaker/HP
Switch
Charge Pump
+VHP
-VHP
+1.65 V to +2.63 V
Analog Supply
Stereo/Mono
Full-Bridge
Speaker
Outputs
Class D Amps
+
-
+
-
IC
Control
Reset
Serial
Audio
Input
Right
Inputs
Σ
4
3
2
1
CS43L22
Confidential Draft
3/4/10
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