CRD42L51 Cirrus Logic Inc, CRD42L51 Datasheet

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CRD42L51

Manufacturer Part Number

CRD42L51

Description

Ref Bd Low-voltage Stereo Codec

Manufacturer

Cirrus Logic Inc

Datasheets

1.CRD42L51.pdf (88 pages)

2.CRD42L51.pdf (82 pages)

Current page: 1 of 82
Download datasheet (792Kb)

Low-power, Stereo CODEC w/ Headphone & Speaker Amps

Stereo CODEC

Left

Inputs

Right

Inputs

High Performance Stereo ADC & DAC

Flexible Stereo Analog Input Architecture

Programmable Automatic Level Control (ALC)

Dual MIC Inputs

Digital Signal Processing Engine

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http://www.cirrus.com

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99 dB (ADC), 98 dB (DAC) Dyn. Range (A-wtd)

-88 dB THD+N

4:1 Analog Input MUX

Analog Input Mixing

Analog Passthrough with Volume Control

Analog Programmable Gain Amplifier (PGA)

Noise Gate for Noise Suppression

Programmable Threshold & Attack/Release

Rates

Differential or Single-ended

+16 dB to +32 dB w/ 1dB step MIC Pre-

Amplifiers

Programmable, Low-noise MIC Bias Levels

Bass & Treble Tone Control, De-emphasis

Master Vol. and Independent PCM SDIN + ADC

SDOUT Mix Volume Control

Soft-ramp & Zero-Cross Transitions

Programmable Peak-detect and Limiter

Beep Generator w/Full Tone Control

+1.65 V to +2.63 V

Analog Supply

Selectable

Bias Voltage

Σ

Σ

MIC Bias

+16 to +32 dB Diff./

S.E. MIC Pre-Amps

Summing

Programmable

Gain Amps

+1.65 V to +3.47 V

Interface Supply

∆Σ ADC

∆Σ ADC

Multi-bit

Multi-bit

+1.65 V to +2.63 V

Control Port

ALC

Volume, Mono

ALC

Swap, Mix

I

2

Copyright © Cirrus Logic, Inc. 2008

Digital Supply

C Control

Level Shifter

(All Rights Reserved)

HPF

Battery Level Monitoring & Compensation

Serial Audio Port

Reset

Limiter, Bass,

DRAFTv1

Treble Adjust

Mono mix,

5/13/08

Class D Stereo/Mono Speaker Amplifier

Stereo Headphone Amplifier

(Features continued on

Beep

No External Filter Required

High-power Stereo Output at 10% THD+N

High-power Mono Output at 10% THD+N

Direct Battery-powered Operation

81% Efficiency at 800 mW

Phase-aligned PWM Output Reduces Idle

Channel Current

Spread Spectrum Modulation

Low Quiescent Current

Ground-centered Outputs

High-power Output at -75 dB THD+N

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Input/Output

Serial Audio

+1.60 V to +5.25 V

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

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

Battery Level Monitoring & Compensation

No DC-Blocking Capacitors Required

Integrated Negative Voltage Regulator

2 x 23 mW Into 16 Ω @ 1.8 V

2 x 44 mW Into 16 Ω @ 2.5 V

Pulse-Width

Modulator

∆Σ DAC

(PWM)

Multi-bit

Battery

+1.65 V to +2.63 V

Class D Amps

Ground-Centered

Amps

page

Charge Pump

-VHP

Analog Supply

2)

CS42L52

+VHP

Headphone Supply

+1.65 V to +2.63 V

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Speaker/HP

Switch

Stereo/Mono

Full-Bridge

Speaker

Outputs

Left HP/Line

Output

Right HP/Line

Output

DS680F1

MAY '08

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