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ISL22444 반도체 회로 부품 판매점

Quad Digitally Controlled Potentiometer



Intersil 로고
Intersil
ISL22444 데이터시트, 핀배열, 회로
NOT RECOMMENDED FOR NEW DESIGNS
RECOMMENDED REPLACEMENT PART
ISL22424
ISL22444
Quad Digitally Controlled Potentiometer (XDCP™)
Data Sheet
May 24, 2007
FN6426.0
Low Noise, Low Power, SPI® Bus, 256 Taps
The ISL22444 integrates four digitally controlled
potentiometers (DCP), control logic 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
wipers position is controlled by the user through the SPI
serial interface. Each potentiometer has an associated
volatile Wiper Register (WRi) and a non-volatile Initial Value
Register (IVRi) that can be directly written to and read by the
user. The contents of the WRi control the position of the
wiper. At power-up the device recalls the contents of the
DCP’s IVRi to the corresponding WRi.
The ISL22444 also has 11 General Purpose non-volatile
registers that can be used as storage of lookup table for
multiple wiper position or any other valuable information.
The ISL22444 features a dual supply that is beneficial for
applications requiring a bipolar range for DCP terminals
between V- and VCC.
Each DCP can be used as three-terminal potentiometer or
as two-terminal variable resistor in a wide variety of
applications including control, parameter adjustments, and
signal processing.
Features
• Four potentiometers in one package
• 256 resistor taps
• SPI serial interface with write/read capability
• Daisy Chain Configuration
• Shutdown mode
• Non-volatile EEPROM storage of wiper position
• 11 General Purpose non-volatile registers
• High reliability
- Endurance: 1,000,000 data changes per bit per register
- Register data retention: 50 years @ T 55°C
• Wiper resistance: 70typical @ 1mA
• Standby current <4µA max
• Shutdown current <4µA max
• Dual power supply
- VCC = 2.25V to 5.5V
- V- = -2.25V to -5.5V
• 10k 50kor 100ktotal resistance
• Extended industrial temperature range: -40 to +125°C
• 20 Ld TSSOP or 20 Ld QFN
• Pb-free plus anneal product (RoHS compliant)
Ordering Information
PART NUMBER
(Notes 1, 2)
ISL22444TFV20Z
PART MARKING
22444 TFVZ
RESISTANCE
OPTION (k)
100
TEMPERATURE
RANGE (°C)
-40 to +125
PACKAGE
(Pb-free)
20 Ld TSSOP
PKG. DWG. #
M20.173
ISL22444TFR20Z
22444 TFRZ
100
-40 to +125
20 Ld QFN
L20.5x5
ISL22444UFV20Z
22444 UFVZ
50
-40 to +125
20 Ld TSSOP
M20.173
ISL22444UFR20Z
22444 UFRZ
50
-40 to +125
20 Ld QFN
L20.5x5
ISL22444WFV20Z
22444 WFVZ
10
-40 to +125
20 Ld TSSOP
M20.173
ISL22444WFR20Z
22444 WFRZ
10
-40 to +125
20 Ld QFN
L20.5x5
NOTES:
1. 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.
2. Add “-TK” suffix for 1,000 Tape and Reel option
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) and XDCP are registered trademarks of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2007. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.


ISL22444 데이터시트, 핀배열, 회로
Block Diagram
SCK
SDI
SDO
CS
SPI
INTERFACE
ISL22444
VCC
V-
POWER-UP,
CONTROL
AND
STATUS
LOGIC
WR3
WR2
NON-VOLATILE
REGISTERS
WR1
WR0
GND
RH3
RW3
RL3
RH2
RW2
RL2
RH1
RW1
RL1
RH0
RW0
RL0
Pinouts
ISL22444
(20 LEAD TSSOP)
TOP VIEW
RH3 1
RL3 2
RW3 3
NC 4
SCK 5
SDO 6
GND 7
RW2 8
RL2 9
RH2 10
20 RW0
19 RL0
18 RH0
17 V-
16 VCC
15 SDI
14 CS
13 RH1
12 RL1
11 RW1
ISL22444
(20 LEAD QFN)
TOP VIEW
20 19 18 17 16
RW3 1
NC 2
SCK 3
SDO 4
GND 5
15 V-
14 VCC
13 SDI
12 CS
11 RH1
6 7 8 9 10
2 FN6426.0
May 24, 2007




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