ASAHI KASEI

[AK4527B]

MS0056-E-00

2000/10

- 1 -

GENERAL DESCRIPTION

The AK4527B is a single chip CODEC that includes two channels of ADC and six channels of DAC. The
ADC outputs 24bit data and the DAC accepts up to 24bit input data. The ADC has the Enhanced Dual Bit
architecture with wide dynamic range. The DAC introduces the new developed Advanced Multi-Bit
architecture, and achieves wider dynamic range and lower outband noise. An auxiliary digital audio input
interface maybe used instead of the ADC for passing audio data to the primary audio output port. Control
may be set directly by pins or programmed through a separate serial interface.

The AK4527B has a dynamic range of 102dB for ADC, 106dB for DAC and is well suited for digital
surround for home theater and car audio. An AC-3 system can be built with a IEC60958(SPDIF) receiver
such as the AK4112A. The AK4527B is available in a small 44pin LQFP package which will reduce
system space.

*AC-3 is a trademark of Dolby Laboratories.

FEATURES

2ch 24bit ADC

- 64x Oversampling
- Sampling Rate up to 96kHz
- Linear Phase Digital Anti-Alias Filter
- Differential Inputs with single-ended use capability
- S/(N+D): 92dB
- Dynamic Range, S/N: 102dB
- Digital HPF for offset cancellation
- I/F format: MSB justified or I

- Overflow flag

6ch 24bit DAC

- 128x Oversampling
- Sampling Rate up to 96kHz
- 24bit 8 times Digital Filter
- Single-Ended Outputs
- On-chip Switched-Capacitor Filter
- S/(N+D): 90dB
- Dynamic Range, S/N: 106dB
- I/F format: MSB justified, LSB justified(20bit,24bit) or I

- Individual channel digital volume with 256 levels and 0.5dB step
- Soft mute
- De-emphasis for 32kHz, 44.1kHz and 48kHz
- Zero Detect Function

High Jitter Tolerance

TTL Level Digital I/F

3-wire Serial and I

C Bus �P I/F for mode setting

Master clock:256fs, 384fs or 512fs for fs=32kHz to 48kHz

128fs, 192fs or 256fs for fs=64kHz to 96kHz

Power Supply: 4.5 to 5.5V

Power Supply for output buffer: 2.7 to 5.5V

Small 44pin LQFP

High Performance Multi-channel Audio CODEC

AK4527B

ASAHI KASEI

[AK4527B]

MS0056-E-00

2000/10

- 2 -

Block Diagram

Audio

I/F

LPF

DAC

DATT

LPF

DAC

DATT

LPF

DAC

DATT

LPF

DAC

DATT

LPF

DAC

DATT

LOUT1

ROUT1

LOUT2

ROUT2

LOUT3

ROUT3

DAC

DATT

AK4527B

ADC

HPF

ADC

HPF

RIN-

RIN+

LIN-

LIN+

LRCK

BICK

SDOUT1

SDOUT2
SDOUT3

AC3

SDIN

MCKO

LRCK

BICK

XTI

XTO

DIR

SDTO

AK4112A

RX4

RX3

RX2

RX1

LRCK

BICK

SDTI1
SDTI2
SDTI3

DAUX

SDOS

MCLK

LRCK

BICK

SDOUT

SDIN1
SDIN2
SDIN3

MCLK

SDTO

Format

Converter

Block Diagram (DIR and AC-3 DSP are external parts)

ASAHI KASEI

[AK4527B]

MS0056-E-00

2000/10

- 3 -

Ordering Guide

AK4527BVQ

-40

+85

�

44pin LQFP(0.8mm pitch)

AKD4527B

Evaluation Board for AK4527B

Pin Layout

SDOS

LOOP1

I2C

SMUTE

BICK

LRCK

SDTI1

SDTI2

SDTI3

SDTO

DAUX

DFS

LOOP0/SDA/CDTI

DIF1/SCL/CCLK

MCLK

DZF1

AVSS

AVDD

VREFH

VCOM

DZFE

TVDD

DVDD

DVSS

TST

ADIF

CAD1

CAD0

DZF2/OVF

RIN+

RIN-

LIN+

LIN-

ROUT1

LOUT1

ROUT2

LOUT2

ROUT3

LOUT3

AK4527BVQ

Top View

PDN

DIF0/CSN

P/S

ASAHI KASEI

[AK4527B]

MS0056-E-00

2000/10

- 4 -

Compatibility with AK4527

1. Functions

Functions

AK4527

AK4527B

Overflow flag

Not available

Available

Clock mode

Setting by pin/bit

Auto setting

Sampling speed mode auto setting

Not available

Available
(MCLK is fixed at auto setting mode;
Normal: 512fs, Double: 256fs)

Zero detection

Serial mode only

Parallel/Serial mode

De-emphasis setting

Pin/Register

C bus mode

Not available

Available

Analog output at power down mode

Hi-Z

VCOM voltage

2. Pin Configuration

Pin#

AK4527

AK4527B

DEM1

DEM0

DZFE

ICKS2

TST

ICKS1

ICKS0

ADIF

DZF2

DZF2/OVF

3. Register

Addr

Changed items

00H

DIF1-0 default values are changed from mode 0 to mode 2.

01H

ACKS (Clock auto setting mode) is added.

08H

DEMA1-C0 default values are changed from "44.1kHz" to "OFF".

09H

ICKS2-0 are removed.

0AH

OVFE (Overflow detection enable) is added.

ASAHI KASEI

[AK4527B]

MS0056-E-00

2000/10

- 5 -

PIN/FUNCTION

No.

Pin Name

I/O

Function

SDOS

SDTO Source Select Pin (Note 1)
"L": Internal ADC output, "H": DAUX input

I2C

Control Mode Select Pin
"L": 3-wire Serial, "H": I

C Bus

SMUTE

Soft Mute Pin (Note 1)
When this pin goes to "H", soft mute cycle is initialized.
When returning to "L", the output mute releases.

BICK

Audio Serial Data Clock Pin

LRCK

Input Channel Clock Pin

SDTI1

DAC1 Audio Serial Data Input Pin

SDTI2

DAC2 Audio Serial Data Input Pin

SDTI3

DAC3 Audio Serial Data Input Pin

SDTO

Audio Serial Data Output Pin

DAUX

AUX Audio Serial Data Input Pin

DFS

Double Speed Sampling Mode Pin (Note 1)
"L": Normal Speed, "H": Double Speed

No Connect
No internal bonding.

DZFE

Zero Input Detect Enable Pin
"L": mode 7 (disable) at parallel mode,
zero detect mode is selectable by DZFM2-0 bits at serial mode
"H": mode 0 (DZF1 is AND of all six channels)

TVDD

Output Buffer Power Supply Pin, 2.7V

5.5V

DVDD

Digital Power Supply Pin, 4.5V

5.5V

DVSS

Digital Ground Pin, 0V

PDN

Power-Down & Reset Pin
When "L", the AK4527B is powered-down and the control registers are reset to default

state. If the state of P/S or CAD0-1 changes, then the AK4527B must be reset by PDN.

TST

Test Pin
This pin should be connected to DVSS.

No Connect
No internal bonding.

ADIF

Analog Input Format Select Pin
"H": Full-differential input, "L": Single-ended input

CAD1

Chip Address 1 Pin

CAD0

Chip Address 0 Pin

Электронный компонент: AK4527BVQ