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零件编号 | ISL22446 | ||
描述 | Quad Digitally Controlled Potentiometer | ||
制造商 | Intersil Corporation | ||
LOGO | |||
1 Page
ISL22446
® Quad Digitally Controlled Potentiometer (XDCP™)
Data Sheet
July 17, 2006
FN6181.0
Low Noise, Low Power, SPI® Bus, 128 Taps
The ISL22446 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
SPI serial 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
DCP’s IVR to the corresponding WR.
The DCPs can be used as three-terminal potentiometers or
as two-terminal variable resistors in a wide variety of
applications including control, parameter adjustments, and
signal processing.
Pinout
www.DataSheet4U.com
ISL22446
(20 LD TSSOP)
TOP VIEW
RH3
RL3
RW3
NC
SCK
SDO
GND
RW2
RL2
RH2
1
2
3
4
5
6
7
8
9
10
20 RW0
19 RL0
18 RH0
17 SHDN
16 VCC
15 SDI
14 CS
13 RH1
12 RL1
11 RW1
Features
• Four potentiometers in one package
• 128 resistor taps
• SPI serial interface
• Non-volatile storage of wiper position
• Wiper resistance: 70Ω typical @ 3.3V
• Shutdown mode
• Shutdown current 5µA max
• Power supply: 2.7V to 5.5V
• 50kΩ or 10kΩ total resistance
• High reliability
- Endurance: 1,000,000 data changes per bit per register
- Register data retention: 50 years @ T <55°C
• 20 Lead TSSOP
• Pb-free plus anneal product (RoHS compliant)
Ordering Information
PART NUMBER
PART MARKING
RESISTANCE OPTION
(kΩ)
TEMP. RANGE
(°C)
PACKAGE
PKG. DWG. #
ISL22446UFV20Z
(Notes 1, 2)
22446 UFVZ
50
-40 to +125
20 Ld TSSOP
M20.173
(Pb-free)
ISL22446WFV20Z
(Notes 1, 2)
22446 WFVZ
10
-40 to +125
20 Ld TSSOP
M20.173
(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. 2005. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
Typical Performance Curves (Continued)
ISL22446
0.4
T=25ºC
0.2
0
-0.2
Vcc =2.7V
Vcc =5.5V
-0.4
-0.6
16 36 56 76 96
TAPPOSITION(DECIMAL)
116
FIGURE 7. DNL vs TAP POSITION IN Rheostat MODE FOR
10kΩ (W)
0.4
T = 25ºC
0.2
0
Vcc = 5.5V
-0.2
-0.4
Vcc = 2.7V
-0.6
16
36 56 76 96
TAP POSITION (DECIMAL)
116
FIGURE 8. INL vs TAP POSITION IN Rheostat MODE FOR
10kΩ (W)
1.00
Vcc = 2.7V
0.50
50k
0.00
-0.50
Vcc = 5.5V
10k
-1.00
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (ºC)
FIGURE 9. END TO END RTOTAL % CHANGE vs
TEMPERATURE
105
90 10k
75
60
45
30
50k
15
0
16
36 56 76
TAP POSITION (DECIM AL)
96
FIGURE 10. TC FOR VOLTAGE DIVIDER MODE IN ppm
300
250
10k
200
150
50k
100
50
0
16 36 56 76 96
TAP POSITION (DECIMAL)
FIGURE 11. TC FOR Rheostat MODE IN ppm
INPUT
OUTPUT
Wiper at Mid Point (position 40h)
Rtotal = 9.5kΩ
FIGURE 12. FREQUENCY RESPONSE (2.6MHz)
8 FN6181.0
July 17, 2006
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页数 | 13 页 | ||
下载 | [ ISL22446.PDF 数据手册 ] |
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