ISL22424 Datasheet, PDF (1/18 Pages) Intersil Corporation – Dual Digitally Controlled Potentiometer (XDCP™)

ISL22424
®
Dual Digitally Controlled Potentiometer (XDCP™)
Data Sheet
May 31, 2007
FN6425.0
Low Noise, Low Power, SPI^® Bus,
256 Taps
The ISL22424 integrates two 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
position of the wiper 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 ISL22424 also has 13 General Purpose non-volatile
registers that can be used as storage of lookup table for
multiple wiper position or any other valuable information.
The ISL22424 features a dual supply, that is beneficial for
applications requiring a bipolar range for DCP terminals
between V- and V_CC.
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
• Two 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
• 13 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: 70Ω typical @ 1mA
• Standby current <4µA max
• Shutdown current <4µA max
• Dual power supply
- V_CC = 2.25V to 5.5V
- V- = -2.25V to -5.5V
• 10kΩ, 50kΩ or 100kΩ total resistance
• Extended industrial temperature range: -40ºC to +125ºC
• 14 Ld TSSOP or 16 Ld QFN
• Pb-free plus anneal product (RoHS compliant)
Ordering Information
PART NUMBER
(NOTES 1, 2)
PART MARKING
RESISTANCE
OPTION (kΩ)
TEMPERATURE
RANGE (°C)
PACKAGE
(Pb-Free)
PKG. DWG. #
ISL22424TFV14Z
22424TFVZ
100
-40 to +125
14 Ld TSSOP
M14.173
ISL22424TFR16Z
22424TFRZ
100
-40 to +125
16 Ld QFN
L16.4x4A
ISL22424UFV14Z
22424UFVZ
50
-40 to +125
14 Ld TSSOP
M14.173
ISL22424UFR16Z
22424UFRZ
50
-40 to +125
16 Ld QFN
L16.4x4A
ISL22424WFV14Z 22424WFVZ
10
-40 to +125
14 Ld TSSOP
M14.173
ISL22424WFR16Z 22424WFRZ
10
-40 to +125
16 Ld QFN
L16.4x4A
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.
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Copyright Intersil Americas Inc. 2007. All Rights Reserved
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