Datasheet > ISL23345

ISL23345

更新时间： 2024-09-15 11:57:15

品牌	Logo	应用领域
英特矽尔 - INTERSIL		电位器
页数	文件大小	规格书
19页	881K
描述
Quad, 256 Tap, Low Voltage Digitally Controlled Potentiometer (XDCPâ¢)

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ISL23345 数据手册

Quad, 256 Tap, Low Voltage Digitally Controlled

Potentiometer (XDCP™)

ISL23345

Features

• Four potentiometers per package

The ISL23345 is a volatile, low voltage, low noise, low power,

256 tap, quad digitally controlled potentiometer (DCP) with an

• 256 resistor taps

™

I C Bus interface. It integrates four DCP cores, wiper switches

and control logic on a monolithic CMOS integrated circuit.

• 10kΩ, 50kΩ or 100kΩ total resistance

• I C serial interface

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

- No additional level translator for low bus supply

- Three address pins allow up to eight devices per bus

I C bus interface. Each potentiometer has an associated

• Maximum supply current without serial bus activity

(standby)

volatile Wiper Register (WRi, i = 0, 1, 2, 3) 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).

- 5µA @ V and V

- 2µA @ V and V

• Shutdown Mode

= 5V

LOGIC

= 1.7V

- Forces the DCP into an end-to-end open circuit and RWi is

connected to RLi internally

The low voltage, low power consumption, and small package

of the ISL23345 make it an ideal choice for use in battery

operated equipment. In addition, the ISL23345 has a V

pin allowing down to 1.2V bus operation, independent from the

- Reduces power consumption by disconnecting the DCP

resistor from the circuit

LOGIC

value. This allows for low logic levels to be connected

• Power supply

directly to the ISL23345 without passing through a voltage

level shifter.

- V = 1.7V to 5.5V analog power supply

- V

LOGIC

= 1.2V to 5.5V I C bus/logic power supply

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.

• Wiper resistance: 70Ω typical @ V = 3.3V

• Power-on preset to mid-scale (128 tap position)

• Extended industrial temperature range: -40°C to +125°C

• 20 Ld TSSOP or 20 QFN packages

Applications

• Power supply margining

• Trimming sensor circuits

• Pb-free (RoHS compliant)

• Gain adjustment in battery powered instruments

• RF power amplifier bias compensation

10000

8000

6000

4000

2000

V_REF

RH1

V_{REF_M}

1 DCP

RW1

ISL23345

ISL28114

RL1

128

192

256

TAP POSITION (DECIMAL)

FIGURE 2. V

ADJUSTMENT

FIGURE 1. FORWARD AND BACKWARD RESISTANCE vs TAP

REF

POSITION, 10kΩ DCP

June 21, 2011

FN7872.0

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

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

12 3 4 5 6 7...19

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与ISL23345相关器件

型号	品牌	获取价格	描述	数据表
ISL23345TFRZ	INTERSIL	获取价格	Quad, 256 Tap, Low Voltage Digitally Controll
ISL23345TFVZ	INTERSIL	获取价格	Quad, 256 Tap, Low Voltage Digitally Controll
ISL23345UFRZ	INTERSIL	获取价格	Quad, 256 Tap, Low Voltage Digitally Controll
ISL23345UFVZ	INTERSIL	获取价格	Quad, 256 Tap, Low Voltage Digitally Controll
ISL23345WFRZ	INTERSIL	获取价格	Quad, 256 Tap, Low Voltage Digitally Controll
ISL23345WFVZ	INTERSIL	获取价格	Quad, 256 Tap, Low Voltage Digitally Controll
ISL23348	INTERSIL	获取价格	Quad, 128 Tap, Low Voltage Digitally Controll
ISL23348TFRZ	INTERSIL	获取价格	Quad, 128 Tap, Low Voltage Digitally Controll
ISL23348TFRZ	RENESAS	获取价格	Quad, 128 Tap, Low Voltage Digitally Controlled Potentiometer (XDCP™); QFN20, TS
ISL23348TFRZ-T7A	RENESAS	获取价格	Quad, 128 Tap, Low Voltage Digitally Controlled Potentiometer (XDCP™); QFN20, TS

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