Datasheet > ISL23428WFVZ

ISL23428WFVZ

更新时间： 2024-09-17 01:10:55

品牌	Logo	应用领域
瑞萨 - RENESAS		/
页数	文件大小	规格书
21页	1100K
描述
Dual, 128-Tap, Low Voltage Digitally Controlled Potentiometer (XDCPâ¢)

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ISL23428WFVZ 数据手册

DATASHEET

ISL23428

FN7904

Rev 2.00

September 23, 2015

Dual, 128-Tap, Low Voltage Digitally Controlled Potentiometer (XDCP™)

The ISL23428 is a volatile, low voltage, low noise, low power,

Features

128-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

• 128 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 (64 tap position).

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

• SPI serial interface

- No additional level translator for low bus supply

- Daisy Chaining of multiple DCPs

• Power supply

- V = 1.7V to 5.5V analog power supply

- V

LOGIC

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

The low voltage, low power consumption, and small package

of the ISL23428 make it an ideal choice for use in battery

• Maximum supply current without serial bus activity

(standby)

operated equipment. In addition, the ISL23428 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

- 4µA @ V and V

= 5V

= 1.7V

LOGIC

CC LOGIC

- 1.7µA @ V and V

directly to the ISL23428 without passing through a voltage

level shifter.

• Shutdown Mode

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

connected to RLi internally

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.

- Reduces power consumption by disconnecting the DCP

resistor from the circuit

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

Applications

• 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)

• Power supply margining

• Trimming sensor circuits

• Gain adjustment in battery powered instruments

• RF power amplifier bias compensation

10000

8000

6000

4000

V_REF

V_{REF_M}

ISL23428

2000

ISL28114

128

TAP POSITION (DECIMAL)

FIGURE 1. FORWARD AND BACKWARD RESISTANCE vs TAP

FIGURE 2. V

ADJUSTMENT

REF

POSITION, 10kΩ DCP

FN7904 Rev 2.00

Page 1 of 21

September 23, 2015

12 3 4 5 6 7...21

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与ISL23428WFVZ相关器件

型号	品牌	获取价格	描述	数据表
ISL23428WFVZ-T7A	RENESAS	获取价格	Dual, 128-Tap, Low Voltage Digitally Controll
ISL23428WFVZ-T7A	INTERSIL	获取价格	Dual, 128-Tap, Low Voltage Digitally Controll
ISL23428WFVZ-TK	RENESAS	获取价格	Dual, 128-Tap, Low Voltage Digitally Controll
ISL23428WFVZ-TK	INTERSIL	获取价格	Dual, 128-Tap, Low Voltage Digitally Controll
ISL23445	INTERSIL	获取价格	Quad, 256 Tap, Low Voltage Digitally Controlled Potentiometer (XDCP?)
ISL23445TFRZ	INTERSIL	获取价格	Quad, 256 Tap, Low Voltage Digitally Controlled Potentiometer (XDCP?)
ISL23445TFRZ	RENESAS	获取价格	Quad, 256 Tap, Low Voltage Digitally Controlled Potentiometer (XDCP™); QFN20, TS
ISL23445TFVZ	INTERSIL	获取价格	Quad, 256 Tap, Low Voltage Digitally Controlled Potentiometer (XDCP?)
ISL23445TFVZ	RENESAS	获取价格	Quad, 256 Tap, Low Voltage Digitally Controlled Potentiometer (XDCP™); QFN20, TS
ISL23445UFRZ	INTERSIL	获取价格	Quad, 256 Tap, Low Voltage Digitally Controlled Potentiometer (XDCP?)

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