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ISL22346

Description
Quad Digitally Controlled Potentiometers
File Size939KB,16 Pages
ManufacturerIntersil ( Renesas )
Websitehttp://www.intersil.com/cda/home/
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ISL22346 Overview

Quad Digitally Controlled Potentiometers

DATASHEET
ISL22346
Quad Digitally Controlled Potentiometers (XDCP™) Low Noise, Low Power I
2
C™
Bus, 128 Taps
The ISL22346 integrates four digitally controlled potentiometers
(DCP) and non-volatile memory on a monolithic CMOS
integrated circuit.
The digitally controlled potentiometers are implemented with
a combination of resistor elements and CMOS switches. The
position of the wipers are controlled by the user through the
I
2
C bus interface. Each potentiometer has an associated
volatile Wiper Register (WR) and a non-volatile Initial Value
Register (IVR) that can be directly written to and read by the
user. The contents of the WR controls the position of the
wiper. At power-up the device recalls the contents of the two
DCP’s IVR to the corresponding WRs.
The DCPs can be used as a three-terminal potentiometers
or as a two-terminal variable resistors in a wide variety of
applications including control, parameter adjustments, and
signal processing.
FN6177
Rev 2.00
September 3, 2009
Features
• Four potentiometers in one package
• 128 resistor taps
• I
2
C serial interface
- Three address pins, up to eight devices/bus
• Non-volatile storage of wiper position
• Wiper resistance: 70 typical @ V
CC
= 3.3V
• Shutdown mode
• Shutdown current 5µA max
• Power supply: 2.7V to 5.5V
• 50kor 10k total resistance
• High reliability
- Endurance: 1,000,000 data changes per bit per register
- Register data retention: 50 years @ T < +55
°
C
• 20 Ld TSSOP or 20 Ld TQFN package
• Pb-free (RoHS compliant)
Pinouts
ISL22346
(20 LD TSSOP)
TOP VIEW
RH3
RL3
RW3
A2
SCL
SDA
GND
RW2
RL2
RH2
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
RW0
RL0
RH0
SHDN
VCC
A1
A0
RH1
RL1
RW1
RL0
RW0
RH3
RL3
RW3
1
2
3
4
5
6
A2
7
SCL
8
SDA
9
GND
10
RW2
O
ISL22346
(20 LD TQFN)
TOP VIEW
SHDN
VCC
RH0
A1
A0
15 RH1
14 RL1
13 RW1
12 RH2
11 RL2
20 19 18 17 16
FN6177 Rev 2.00
September 3, 2009
Page 1 of 16

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