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ISL23318TFUZ датащи(PDF) 1 Page - Intersil Corporation

номер детали ISL23318TFUZ
подробное описание детали  Single, 128-taps Low Voltage Digitally Controlled Potentiometer (XDCP??
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производитель  INTERSIL [Intersil Corporation]
домашняя страница  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

ISL23318TFUZ датащи(HTML) 1 Page - Intersil Corporation

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CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
| Copyright Intersil Americas Inc. 2011. All Rights Reserved
Intersil (and design) and XDCP are trademarks owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners
Single, 128-taps Low Voltage Digitally Controlled
Potentiometer (XDCP™)
ISL23318
The ISL23318 is a volatile, low voltage, low noise, low power,
I2C Bus™, 128 Taps, single digitally controlled potentiometer
(DCP), which integrates DCP core, wiper switches and control
logic 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 wipers are controlled by the user through the
I2C bus interface. The potentiometer has an associated
volatile Wiper Register (WR) that can be directly written to and
read by the user. The contents of the WR controls the position
of the wiper. When powered on, the ISL23318’s wiper will
always commence at mid-scale (64 tap position).
The low voltage, low power consumption, and small package
of the ISL23318 make it an ideal choice for use in battery
operated equipment. In addition, the ISL23318 has a VLOGIC
pin allowing down to 1.2V bus operation, independent from the
VCC value. This allows for low logic levels to be connected
directly to the ISL23318 without passing through a voltage
level shifter.
The DCP can be used as a three-terminal potentiometer or as a
two-terminal variable resistor in a wide variety of applications
including control, parameter adjustments, and signal
processing.
Features
•128 resistor taps
•I2C serial interface
- No additional level translator for low bus supply
- Two address pins allow up to four devices per bus
•Power supply
-VCC = 1.7V to 5.5V analog power supply
-VLOGIC = 1.2V to 5.5V I2C bus/logic power supply
• Wiper resistance: 70Ω typical @ VCC = 3.3V
• Shutdown Mode - forces the DCP into an end-to-end open
circuit and RW is shorted to RL internally
• Power-on preset to mid-scale (64 tap position)
• Shutdown and standby current <2.8µA max
• DCP terminal voltage from 0V to VCC
•10kΩ
, 50kΩ or 100kΩ total resistance
• Extended industrial temperature range: -40°C to +125°C
• 10 Ld MSOP or 10 Ld UTQFN packages
• Pb-free (RoHS compliant)
Applications
• Gain adjustment in battery powered instruments
• Trimming sensor circuits
• Power supply margining
• RF power amplifier bias compensation
FIGURE 1. FORWARD AND BACKWARD RESISTANCE vs TAP
POSITION, 10k DCP
FIGURE 2. VREF ADJUSTMENT
0
2000
4000
6000
8000
10000
032
64
96
128
TAP POSITION (DECIMAL)
VREF_M
ISL28114
ISL23318
+
-
VREF
RL
RW
RH
July 26, 2011
FN7887.0


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