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ISL22444 Datasheet PDF - Intersil

Part Number ISL22444
Description Quad Digitally Controlled Potentiometer
Manufacturers Intersil 
Logo Intersil Logo 

Preview ( 19 pages )
		
ISL22444 datasheet, circuit
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.

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ISL22444 equivalent
ISL22444
Analog Specifications Over recommended operating conditions unless otherwise stated. (Continued)
SYMBOL
PARAMETER
TEST CONDITIONS
TYP
MIN (NOTE 4) MAX
fcutoff
-3dB cut off frequency
(Note 20)
Wiper at midpoint (80hex) W option (10k)
Wiper at midpoint (80hex) U option (50k)
1000
250
Wiper at midpoint (80hex) T option (100k)
120
RESISTOR MODE (Measurements between RWi and RL i with RHi not connected, or between RWi and RHi with RLi not connected)
RINL
Integral non-linearity
(Note 15)
W option
-3 ±1.5
3
U, T option
-1 ±0.4
1
RDNL Differential non-linearity
(Note 14)
W option
U, T option
-1.5 ±0.5
1.5
-0.5 ±0.15 0.5
Roffset Offset
(Note 13)
W option
U, T option
015
0 0.5 2
RMATCH DCP to DCP matching
(Note 16)
Wipers at the same tap position with the
same terminal voltages
-3
3
TCR Resistance temperature coefficient
(Note 17, 20)
DCP register set between 32 hex and FFhex
±40
UNIT
kHz
kHz
kHz
MI
(Note 12)
MI
(Note 12)
MI
(Note 12)
MI
(Note 12)
MI
(Note 12)
MI
(Note 12)
MI
(Note 12)
ppm/°C
Operating Specifications Over the recommended operating conditions unless otherwise specified.
SYMBOL
ICC1
PARAMETER
VCC Supply Current (volatile
write/read)
IV-1 V- Supply Current (volatile
write/read)
ICC2
VCC Supply Current (non-volatile
write/read)
IV-2 V- Supply Current (non-volatile
write/read)
V- Supply Current (non-volatile
write/read)
ISB VCC Current (standby)
TEST CONDITIONS
VCC = 5.5V, fSCK = 5MHz; (for SPI Active, Read
and Volatile Write states only)
VCC = 2.25V, fSCK = 5MHz; (for SPI Active, Read
and Volatile Write states only)
V- = -5.5V, VCC = 5.5V, fSCK = 5MHz; (for SPI
Active, Read and Volatile Write states only)
V- = -2.25V, VCC = 2.25V, fSCK = 5MHz; (for SPI
Active, Read and Volatile Write states only)
VCC = 5.5V, V- = 5.5V, fSCK = 5MHz; (for SPI
Active, Read and Non-volatile Write states only)
VCC = 2.25V, V- = -2.25V, fSCK = 5MHz; (for SPI
Active, Read and Non-volatile Write states only)
V- = -5.5V, VCC = 5.5V, fSCK = 5MHz; (for SPI
Active, Read and Non-volatile Write states only)
V- = -2.25V, VCC = 2.25V, fSCK = 5MHz; (for SPI
Active, Read and Non-volatile Write states only)
VCC = +5.5V, V- = -5.5V @ +85°C, SPI interface
in standby state
VCC = +5.5V, V- = -5.5V @ +125°C, SPI interface
in standby state
VCC = +2.25V, V- = -2.25V @ +85°C, SPI
interface in standby state
VCC = +2.25V, V- = -2.25V @ +125°C, SPI
interface in standby state
MIN
-1.0
-0.5
-2.0
-1.0
TYP
(NOTE 4)
0.6
MAX
1.0
0.25 0.5
-0.3
-0.1
1.0 2.0
0.3 1.0
-1.2
-0.4
0.5 2.0
1.0 4.0
0.2 1.0
0.5 2.0
UNIT
mA
mA
mA
mA
mA
mA
mA
mA
µA
µA
µA
µA
5 FN6426.0
May 24, 2007

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Information Total 19 Pages
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