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ISL23325UFRUZ-TK 데이터시트(PDF) 1 Page - Intersil Corporation

부품명 ISL23325UFRUZ-TK
상세설명  Dual, 256-Tap, Low Voltage Digitally Controlled Potentiometer (XDCP??
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제조업체  INTERSIL [Intersil Corporation]
홈페이지  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

ISL23325UFRUZ-TK 데이터시트(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
Dual, 256-Tap, Low Voltage Digitally Controlled
Potentiometer (XDCP™)
ISL23325
The ISL23325 is a volatile, low voltage, low noise, low power,
256-Tap, dual digitally controlled potentiometer (DCP) with an
I2C Bus™ interface. It integrates two DCP cores, wiper switches
and control logic on a monolithic CMOS integrated circuit.
Each 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. Each potentiometer has an associated volatile
Wiper Register (WRi, i = 0, 1) that can be directly written to and
read by the user. The contents of the WRi controls the position
of the wiper. When powered on, the wiper of each DCP will
always commence at mid-scale (128 tap position).
The low voltage, low power consumption, and small package
of the ISL23325 make it an ideal choice for use in battery
operated equipment. In addition, the ISL23325 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 ISL23325 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.
Applications
• Power supply margining
• Trimming sensor circuits
• Gain adjustment in battery powered instruments
• RF power amplifier bias compensation
Features
• Two potentiometers per package
• 256 resistor taps
•10kΩ 50kΩ or 100kΩ total resistance
•I2C serial interface
- No additional level translator for low bus supply
- Three address pins allow up to eight devices per bus
• Maximum supply current without serial bus activity
(standby)
- 3µA @ VCC and VLOGIC = 5V
- 1.7µA @ VCCand VLOGIC = 1.7V
•Shutdown Mode
- Forces the DCP into an end-to-end open circuit and RWi is
connected to RLi internally
- Reduces power consumption by disconnecting the DCP
resistor from the circuit
•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
• Power-on preset to mid-scale (128 tap position)
• Extended industrial temperature range: -40°C to +125°C
• 14 Ld TSSOP or 16 Ld µTQFN packages
• Pb-free (RoHS Compliant)
FIGURE 1. FORWARD AND BACKWARD RESISTANCE vs TAP
POSITION, 10kΩ DCP
FIGURE 2. VREF ADJUSTMENT
0
2000
4000
6000
8000
10000
TAP POSITION (DECIMAL)
0
64
128
192
256
VREF_M
ISL28114
1 DCP
OF
ISL23325
+
-
VREF
RL1
RW1
RH1
June 21, 2011
FN7870.0


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