1

®

FN8203.2

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

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XDCP is a trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2005. All Rights Reserved

All other trademarks mentioned are the property of their respective owners.

X9460

Low Noise, Low Cost, High End Features, Dual Audio Log Potentiometer

Dual Audio Control Digitally Controlled

Potentiometer (XDCP™)

The X9460 integrates two digitally controlled potentiometer

(XDCP) on a monolithic CMOS integrated circuit. The two

XDCPs can be used as stereo gain controls in audio

applications. Read/Write operations can directly access

each channel independently or both channels

simultaneously. Increment/Decrement can adjust each

channel independently or both channels simultaneously.

The X9460 contains a zero amplitude wiper switching circuit

that delays wiper changes until the next zero crossing of the

audio signal.

The digitally controlled potentiometer is implemented using

31 polysilicon resistors in a log array. Between each of the

resistors are tap points connected to the wiper terminal

through switches. The XDCPs are designed to minimize

wiper noise to avoid pops and clicks during audio volume

transitions. The position of the wiper on the array is

controlled by the user through the 2-wire serial bus interface.

Power-up reset the wiper to the mute position.

Pinout

X9460

(14 LD TSSOP)

TOP VIEW

Features

• Dual Audio Control – Two 32 Taps Log Pots

• Zero Amplitude Wiper Switching

• 2-Wire Serial Interface

4 Slave Byte Addresses for Writes[A1,A0]

• Total Resistance: 33k

Ω Each XDCP (Typical)

• Dual Voltage Operation

V+/V- = ±2.7 to ±5.5V

• Temp Range = -40°C to +85°C

• Package Options

14 L d TSSOP

• Zero Amplitude Wiper Switching

• Pb-Free Plus Anneal Available (RoHS Compliant)

Audio Performance

• 0 to - 62dB Volume Control

• -92dB Mute

- Power-Up to Mute Position

• SNR -96dB

• THD+N: -95dB @1kHz

• Crosstalk Rejection: -102dB @ 1kHz

• Channel-to-Channel Variation: ± 0.1dB

• 3dB-Cutoff: 100kHz

Applications

• Set Top Boxes

• Stereo Amplifiers

• DVD Players

• Portable Audio Products

SDA

1

2

3

4

5

6

7

8

14

13

12

11

10

9

V+

A1

SCL

A0

V-

X9460

Ordering Information

PART NUMBER

PART MARKING

TEMP RANGE (°C)

PACKAGE

X9460KV14I*

X9460KV I

5V ± 10%

-40 to +85

14 Ld TSSOP

X9460KV14IZ* (Note)

X9460KV Z I

-40 to +85

14 Ld TSSOP (Pb-free)

X9460KV14I-2.7*

X9460KV G

2.7 to 5.5

-40 to +85

14 Ld TSSOP

X9460KV14IZ-2.7* (Note)

X9460KV Z G

-40 to +85

14 Ld TSSOP (Pb-free)

*Add "T1" suffix for tape and reel.

NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate

termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL

classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.

Data Sheet

October 17, 2005