Datasheet > ISL23425

ISL23425

更新时间： 2024-11-06 11:11:43

品牌	Logo	应用领域
英特矽尔 - INTERSIL		电位器
页数	文件大小	规格书
20页	847K
描述
Dual, 256-Tap, Low Voltage Digitally Controlled Potentiometer (XDCP?)

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ISL23425 数据手册

Dual, 256-Tap, Low Voltage Digitally Controlled

Potentiometer (XDCP™)

ISL23425

The ISL23425 is a volatile, low voltage, low noise, low power,

256-tap, dual digitally controlled potentiometer (DCP) with an

SPI Bus™ interface. It integrates two DCP cores, wiper switches

and control logic on a monolithic CMOS integrated circuit.

Features

• Two potentiometers per package

• 256 resistor taps

• 10kΩ, 50kΩ or 100kΩ total resistance

• SPI 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

SPI 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).

- No additional level translator for low bus supply

- Daisy Chaining of multiple DCPs

• Maximum supply current without serial bus activity

(standby)

- 4µA @ V and V

CC LOGIC

- 1.7µA @ V and V

= 5V

= 1.7V

LOGIC

• Shutdown Mode

The low voltage, low power consumption, and small package

of the ISL23425 make it an ideal choice for use in battery

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

connected to RLi internally

operated equipment. In addition, the ISL23425 has a V

LOGIC

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

value. This allows for low logic levels to be connected

- Reduces power consumption by disconnecting the DCP

resistor from the circuit

directly to the ISL23425 without passing through a voltage

level shifter.

• Power supply

- V = 1.7V to 5.5V analog 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.

- V

LOGIC

= 1.2V to 5.5V SPI bus/logic power supply

• 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

• 14 Ld TSSOP or 16 Ld µTQFN packages

• Pb-free (RoHS compliant)

Applications

• Power supply margining

• Trimming sensor circuits

• Gain adjustment in battery powered instruments

• RF power amplifier bias compensation

10000

8000

6000

4000

2000

V_REF

RH1

V_{REF_M}

1 DCP

ISL23325

RW1

ISL28114

RL1

128

192

256

TAP POSITION (DECIMAL)

FIGURE 1. FORWARD AND BACKWARD RESISTANCE vs TAP

FIGURE 2. V

ADJUSTMENT

REF

POSITION, 10kΩ DCP

June 20, 2011

FN7873.0

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...20

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与ISL23425相关器件

型号	品牌	获取价格	描述	数据表
ISL23425TFRUZ-T7A	INTERSIL	获取价格	Dual, 256-Tap, Low Voltage Digitally Controlled Potentiometer (XDCP?)
ISL23425TFRUZ-TK	INTERSIL	获取价格	Dual, 256-Tap, Low Voltage Digitally Controlled Potentiometer (XDCP?)
ISL23425TFVZ	INTERSIL	获取价格	Dual, 256-Tap, Low Voltage Digitally Controlled Potentiometer (XDCP?)
ISL23425UFRUZ-T7A	INTERSIL	获取价格	Dual, 256-Tap, Low Voltage Digitally Controlled Potentiometer (XDCP?)
ISL23425UFRUZ-TK	INTERSIL	获取价格	Dual, 256-Tap, Low Voltage Digitally Controlled Potentiometer (XDCP?)
ISL23425UFVZ	INTERSIL	获取价格	Dual, 256-Tap, Low Voltage Digitally Controlled Potentiometer (XDCP?)
ISL23425WFRUZ-T7A	INTERSIL	获取价格	Dual, 256-Tap, Low Voltage Digitally Controlled Potentiometer (XDCP?)
ISL23425WFRUZ-TK	INTERSIL	获取价格	Dual, 256-Tap, Low Voltage Digitally Controlled Potentiometer (XDCP?)
ISL23428	INTERSIL	获取价格	Dual, 128-Tap, Low Voltage Digitally Controlled Potentiometer (XDCP?)
ISL23428	RENESAS	获取价格	Dual, 128-Tap, Low Voltage Digitally Controll

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