ML7022-01MB データシートの表示（PDF） - Oki Electric Industry

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ML7022-01MB

Single Rail Dual Channel PCM CODEC

Oki Electric Industry 

1Semiconductor

FEDL7022-01-06

ML7022-01

FUNCTIONAL DESCRIPTION

Pin Functional Description

AIN1, AIN2, GSX1, GSX2

AIN1 and AIN2 are the transmit analog inputs for Channels 1 and 2.

GSX1 and GSX2 are the transmit level adjustments for Channels 1 and 2.

AIN1 and AIN2 are inverting inputs for the op-amp; GSX1 and GSX2 are connected to the output of the op-amp

and are used to adjust the level, as shown below.

If AIN1 and AIN2 are not used, connect AIN1 to GSX1 and AIN2 to GSX2. During power saving and power down

mode, the GSX1 and GSX2 outputs are at AG voltage.

In the case of the analog input 2.26 Vpp at GSX pin with digital output +3.17 dBm0 (µ-law).

CH1

Analog

Input

C1 R1

CH2

Analog

Input

C2 R3

GSX1

R2

AIN1

SG

GSX2

R4

AIN2

SG

CH1 Gain

Gain = R2/R1 ≤ 10

R1: Variable

R2 > 20 kΩ

C1 > 1/ (2 × 3.14 × 30 × R1)

CH2 Gain

Gain = R4/R3 ≤ 10

R3: Variable

R4 > 20 kΩ

C2 > 1/ (2 × 3.14 × 30 × R3)

AOUT1, AOUT2

AOUT1 is the receive analog output for Channel 1 and AOUT2 is used for Channel 2.

The output signal has an amplitude of 3.4Vpp above and below the signal ground voltage (SG).When the digital

signal of +3.17 dBm0 is input to DIN, it can drive a load of 600Ω or more.

During power saving or power down mode, these outputs are at a high impedance.

VDD

Power supply for +5 V.

Connect a bypass capacitor of 0.1 µF with excellent high frequency characteristics between this pin and the AG

pin.

Although VDD pin 1 and VDD pin 15 are connected internally, these pins must be connected on the printed circuit

board.

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