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ISL23328UFRUZ-T7A bảng dữ liệu(PDF) 1 Page - Intersil Corporation

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Giải thích chi tiết về linh kiện  Dual, 128-Tap, Low Voltage Digitally Controlled Potentiometer (XDCP??
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nhà sản xuất  INTERSIL [Intersil Corporation]
Trang chủ  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

ISL23328UFRUZ-T7A bảng dữ liệu(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, 128-Tap, Low Voltage Digitally Controlled
Potentiometer (XDCP™)
ISL23328
The ISL23328 is a volatile, low voltage, low noise, low power,
128-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 (64 tap position).
The low voltage, low power consumption, and small package
of the ISL23328 make it an ideal choice for use in battery
operated equipment. In addition, the ISL23328 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 ISL23328 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
•128 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
•Power supply
-VCC = 1.7V to 5.5V analog power supply
-VLOGIC = 1.2V to 5.5V I2C bus/logic power supply
• Maximum supply current without serial bus activity
(standby)
- 3µA @ VCC and VLOGIC = 5V
- 1.7µA @ VCC and 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
• Wiper resistance: 70Ω typical @ VCC = 3.3V
• Power-on preset to mid-scale (64 tap position)
• Extended industrial temperature range: -40°C to +125°C
• 14 Ld TSSOP or 16 Ld UTQFN 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
032
64
96
128
TAP POSITION (DECIMAL)
VREF_M
ISL28114
1 DCP
OF
ISL23328
+
-
VREF
RL1
RW1
RH1
August 19, 2011
FN7902.0


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