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ISL22102IR20Z

Description
Dual, Audio, Push-button Controlled Potentiometer (XDCP⑩)
File Size539KB,12 Pages
ManufacturerIntersil ( Renesas )
Websitehttp://www.intersil.com/cda/home/
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ISL22102IR20Z Overview

Dual, Audio, Push-button Controlled Potentiometer (XDCP⑩)

DATASHEET
ISL22102
32 Tap, Push-Button, Dual Audio Logarithmic Potentiometer with Buffer Amplifiers
and Audio Detection
The ISL22102 integrates two digitally controlled
potentiometers (DCP) with buffered wiper outputs and an
internal bias voltage generator (VB) on a monolithic CMOS
integrated circuit. The wiper position is adjusted by the user
through simple Up and Down push buttons, ideal for stereo
volume control in audio applications.
Each potentiometer is implemented using 31 polysilicon
resistors in a logarithmic array. Between each of the
resistors are tap points connected to the wiper terminal
through switches. When powered up, the wipers are reset to
the -20dB position.
In addition to the ISL22102’s low noise design, the ISL22102
also contains a zero-crossing detection circuitry to further
minimize click and pop noise during volume transition.
The internal VB generator of the ISL22102 provides a
precision middle scale voltage reference that reduces
external circuitry and simplifies application design.
The ISL22102 implements two power saving techniques for
power critical applications. It is a Standby Mode that can be
enabled to reduce the power consumption of the part when
DCP is not in use. The part also has Audio Detection
circuitry that provides an indication FLAG to external devices
and services. The FLAG can be delayed through D0, D1 and
D2 pin configuration. By connecting the FLAG to the standby
pin (SB), it will automatically put the part into Standby Mode.
FN6788
Rev 2.00
September 21, 2015
Features
• Dual Audio Control – Two 32 Taps Log Pots
• Buffered Wiper Outputs
• Audio Detection with Threshold Input and Controlled
Delay
• Zero Amplitude Wiper Switching (ZAWS)
• Simple Push-button Interface
• Auto Increment/decrement After 1s Button Press
• Standby Mode
• Mute Function
• Total Resistance: 18.5k each DCP (Typical)
• Voltage Operation
- VCC = 2.7V to 5.5V
- AVCC = 2.7V to 5.5V
• Temp Range = -40°C to +85°C
• Package Options
- 20 Ld TSSOP
- 20 Ld QFN
• Pb-Free (RoHS Compliant)
Audio Performance
• 0dB to -72dB Volume Control
• -90dB Mute
• SNR: -90dB
• THD+N: 0.01% @ 1kHz
• Crosstalk Rejection: -100dB @ 1kHz
• Channel-to-Channel Variation: ±0.1dB
Pinout
ISL22102
(20 LD QFN)
TOP VIEW
FLAG
UP
SB
D2
17
D1
16
15 D0
14 V
TH
13 GND
12 HPB
11 HPA
6
LEFT_OUT
7
CB
8
VB
9
RIGHT_OUT
10
RIGHT_IN
20
DN
MUTE
VCC
AVCC
LEFT_IN
1
2
3
4
5
19
18
• Mid point 3dB-Cutoff: 100kHz
Applications
• Set Top Boxes
• Stereo Amplifiers
• DVD Players
• Portable Audio Products
FN6788 Rev 2.00
September 21, 2015
Page 1 of 12

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