Datasheet > ISL23425

ISL23425

更新时间： 2024-09-17 14:57:19

品牌	Logo	应用领域
瑞萨 - RENESAS		/
页数	文件大小	规格书
20页	1251K
描述
Dual, 256-Tap, Low Voltage Digitally Controlled Potentiometer (XDCP?)

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ISL23425 数据手册

DATASHEET

ISL23425

FN7873

Rev 1.00

September 11, 2015

Dual, 256-Tap, Low Voltage Digitally Controlled Potentiometer (XDCP™)

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

Features

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.

• Two potentiometers per package

• 256 resistor taps

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).

• 10k 50kor 100k total resistance

• SPI serial interface

- 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

= 5V

= 1.7V

The low voltage, low power consumption, and small package

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

- 1.7µA @ V and V

LOGIC

• Shutdown Mode

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

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

connected to RLi internally

directly to the ISL23425 without passing through a voltage

level shifter.

- Reduces power consumption by disconnecting the DCP

resistor from the circuit

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.

• Power supply

- V = 1.7V to 5.5V analog power supply

- V

LOGIC

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

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

Applications

• 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)

• 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

FN7873 Rev 1.00

Page 1 of 20

September 11, 2015

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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