DS4420 Ver la hoja de datos (PDF) - Maxim Integrated

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DS4420

I2C Programmable-Gain Amplifier for Audio Applications

Maxim Integrated 

I2C Programmable-Gain Amplifier

for Audio Applications

Control Register (F8h)

Power-Up Default:

1000 0000 b

F8h Standby

x

bit 7

Mute

Gain Setting[4:0]

bit 4

bit 3

bit 2

bit 1

bit 0

bit 7

bit 6

bit 5

bit 4:0

Standby: Places the DS4420 in standby mode.

0 = Normal operation.

1 = Places the DS4420 in standby mode. (Power-up default.)

Don’t care.

Mute: Mutes the amplifier output, regardless of the current gain setting.

0 = Normal operation. (Power-up default.)

1 = Mutes the amplifier output.

Gain Setting: Five-bit gain setting. The power-up default is setting 00h.

GAIN

SETTING

(hex)

00h

01h

02h

03h

04h

05h

06h

07h

08h

09h

0Ah

GAIN

(dB)

-35

-32

-29

-26

-23

-20

-17

-14

-11

-8

-5

GAIN

SETTING

(hex)

0Bh

0Ch

0Dh

0Eh

0Fh

10h

11h

12h

13h

14h

15h to 1Fh

GAIN

(dB)

-2

+1

+4

+7

+10

+13

+16

+19

+22

+25

Illegal

Figure 1. Control Register Description

Slave Address Byte and Address Pins

The slave address byte consists of a 7-bit slave

address plus a R/W bit (see Figure 2). The DS4420’s

slave address is determined by the state of the A0, A1,

and A2 address pins. These pins allow up to eight

DS4420s to reside on the same I2C bus. Address pins

connected to GND result in a ‘0’ in the corresponding

bit position in the slave address. Conversely, address

pins connected to VCC result in a ‘1’ in the correspond-

ing bit positions. For example, the DS4420’s slave

address byte is A0h when A0, A1, and A2 pins are

grounded. I2C communication is described in detail in

the I2C Serial Interface Description section.

MSB

LSB

1 0 1 0 A2 A1 A0 R/W

SLAVE

ADDRESS*

READ/WRITE

BIT

*THE SLAVE ADDRESS IS DETERMINED BY ADDRESS PINS A0, A1, AND A2.

Figure 2. DS4420 Slave Address Byte

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