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

Número de pieza

componentes Descripción

Fabricante

DS4420

I2C Programmable-Gain Amplifier for Audio Applications

Maxim Integrated 

I2C Programmable-Gain Amplifier

for Audio Applications

Exposed Paddle

The DS4420 exposed paddle is not electrically isolated.

It must be soldered to ground for proper operation.

Input-Coupling Capacitors

The DS4420 is designed to be operated with an AC-

coupled input signal. The input resistance, RIN, is suffi-

ciently large to allow the use of small and inexpensive

external capacitors. The input resistance combined

with the AC-coupling capacitor will create a highpass

filter. The -3dB cutoff frequency of the highpass, fC, is

given by:

fC

=

2π

×

1

CIN

×

RIN

where CIN is the external coupling capacitor and RIN is

the internal input resistance.

At the cutoff frequency, the input signal will be attenuat-

ed 3dB, with less attenuation as the signal’s frequency

increases beyond the cutoff frequency. To guarantee

passband flatness, the cutoff frequency of the filter

should be designed using the specified minimum input

resistance, and placed well below the desired flat band

of the circuit. The typical input resistance should only

be used to estimate typical performance.

Internal Ground Connections

The DS4420’s ground pins, GND and AGND, must be

connected together externally. Internally, they are con-

nected as shown in Figure 5.

13Ω

TYPICAL

GND

AGND

Figure 5. Internal Ground Connections

Chip Topology

TRANSISTOR COUNT: 5347

SUBSTRATE CONNECTED TO: Ground

Package Information

For the latest package outline information, go to www.maxim-

ic.com/DallasPackInfo.

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are

implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.

10 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600

© 2006 Maxim Integrated Products

is a registered trademark of Maxim Integrated Products, Inc.

is a registered trademark of Dallas Semiconductor Corporation.

Springer

Share Link: