AKD4356_ Ver la hoja de datos (PDF) - Asahi Kasei Microdevices

Número de pieza

componentes Descripción

Fabricante

AKD4356_

Evaluation board Rev.B for AK4356

Asahi Kasei Microdevices 

ASAHI KASEI

[AKD4356]

n External analog circuit

The 2nd order LPF (fc=93.2kHz, Q=0.712) which adds differential outputs of AK4356 is implemented on the board.

When the further attenuation of the out-band noise is needed, some additional LPF is required. Analog signal is output

through BNC connectors on the board. And the output level of AK4356 is 5.5Vpp@5V.

The AK4356 detects input signal “zero” conditions and assert high on DZFL/DZFR pins. As shown on Figure 2, analog

output is muted externally with this signal.

DZFL*

(DZFR*)

LOUT-

(ROUT-)

RN1202

JP*

DZFL*

(DZFR*) R2

R1

R3

C1

C2

+12V

AVDD

RN2202

2SC3327

LOUT-

(ROUT-)

R1

R3

R2

-

+

C2

22u

NJM5532D

-12V

220

10k

Figure 2. On-board analog filter

R1

R2

R3

C1

C2

4.7k

4.7k

200

3300p

470p

Table 1. The value of R,C on this board

fin

20kHz

40kHz

Frequency Response -0.004dB -0.123dB

Table 2. Frequency Response of LPF

80kHz

-1.823dB

<Calculation>

fC=

ω0

2π

,

ω0=

1

,

2*C1*C2*R2*R3

Q=

2*C1*ω0 .

1

R1

+

1

R2

+

1

R3

<KM060602>

-2-

’99/11

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