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ISL22419 Schematic ( PDF Datasheet ) - Intersil Corporation

Teilenummer ISL22419
Beschreibung Single Digitally Controlled Potentiometer
Hersteller Intersil Corporation
Logo Intersil Corporation Logo 




Gesamt 13 Seiten
ISL22419 Datasheet, Funktion
www.DataSheet4U.com
ISL22419
® Single Digitally Controlled Potentiometer (XDCP™)
Data Sheet
June 28, 2006
FN6311.0
Low Noise, Low Power, SPI® Bus, 128 Taps,
Wiper Only
The ISL22419 integrates a single digitally controlled
potentiometer (DCP) and non-volatile memory on a
monolithic CMOS integrated circuit.
The digitally controlled potentiometer is 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. The 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 content of the
DCP’s IVR to the WR.
The DCP can be used as a voltage divider in a wide variety
of applications including control, parameter adjustments, AC
measurement and signal processing.
Pinout
ISL22419
(8 LD MSOP)
TOP VIEW
SCK
SDO
SDI
CS
1
2
3
4
8 Vcc
7 RW
6 SHDN
5 GND
Features
• 128 resistor taps
• SPI serial interface
• Non-volatile storage of wiper position
• Wiper resistance: 70typical @ 3.3V
• Shutdown mode
• Shutdown current 5µA max
• Power supply: 2.7V to 5.5V
• 50kor 10ktotal resistance
• High reliability
- Endurance: 1,000,000 data changes per bit per register
- Register data retention: 50 years @ T 55 °C
• 8 Lead MSOP
• Pb-free plus anneal product (RoHS compliant)
Ordering Information
PART NUMBER
PART MARKING
RESISTANCE OPTION
(k)
TEMP. RANGE
(°C)
PACKAGE
PKG. DWG. #
ISL22419UFU8Z
(Notes 1, 2)
419UZ
50
-40 to +125
8 Ld MSOP
M8.118
(Pb-Free)
ISL22419WFU8Z
(Notes 1, 2)
419WZ
10
-40 to +125
8 Ld MSOP
M8.118
(Pb-Free)
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. 2006. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.






ISL22419 Datasheet, Funktion
Timing Diagrams
Input Timing
CS
SCK
SDI
SDO
tLEAD
tSU
MSB
tH
High Impedance
tWL
ISL22419
tCYC
...
tWH
...
tFI
tCS
tRI
LSB
tLAG
Output Timing
CS
SCK
SDO
SDI ADDR
tV
MSB
XDCP Timing (for All Load Instructions)
CS
SCK
SDI MSB
VW
SDO
High Impedance
...
tHO
...
tDIS
LSB
...
tWRT
... LSB
tWC
6 FN6311.0
June 28, 2006

6 Page









ISL22419 pdf, datenblatt
ISL22419
Examples:
A. Writing to the IVR:
This sequence will write a new value (77h) to the IVR(non-volatile):
Set the ACR (Addr 02h) for NV write (40h)
Send the ID byte, Instruction Byte, then the Data byte
010100001100001001000000
(Sent to SDI)
Set the IVR (Addr 00h) to 77h
Send the ID byte, Instruction Byte, then the Data byte
010100001100000001110111
(Sent to SDI)
B. Reading from the WR:
This sequence will read the value from the WR (volatile):
Write to ACR first to access the WR
Send the ID byte, Instruction Byte, then the Data byte
010100001100001011000000
(Sent to SDI)
Read the data from WR (Addr 00h)
Send the ID byte, Instruction Byte, then Read the Data byte
0101000010110000xxxxxxxx
(Out on SDO)
VCC
VCC
0.1µF
Rpu
SHDN
SCK
SDO
SDI
CS
RW
ISL22419
VCC
0.1µF
VOUT
R2
R1
FIGURE 14. TYPICAL APPLICATION DIAGRAM FOR IMPLEMENTING ADJUSTABLE VOLTAGE REFERANCE
12 FN6311.0
June 28, 2006

12 Page





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