Datasheet > ISL23428TFRUZ-T7A

ISL23428TFRUZ-T7A

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
21页	637K
描述
Dual, 128-Tap, Low Voltage Digitally Controlled Potentiometer (XDCP?)

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ISL23428TFRUZ-T7A 数据手册

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Dual, 128-Tap, Low Voltage Digitally Controlled

Potentiometer (XDCP™)

ISL23428

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

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.

Features

• Two potentiometers per package

• 128 resistor taps

• 10k 50kor 100k 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 (64 tap position).

- 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

• Maximum supply current without serial bus activity

(standby)

The low voltage, low power consumption, and small package

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

- 4µA @ V and V

CC LOGIC

- 1.7µA @ V and V

= 5V

= 1.7V

operated equipment. In addition, the ISL23428 has a V

LOGIC

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

• Shutdown Mode

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 ISL23428 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.

• Wiper resistance: 70 typical @ V = 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)

Applications

• 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

August 25, 2011

FN7904.0

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...21

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ISL23428TFRUZ-T7A 替代型号

型号	品牌	替代类型	描述	数据表
ISL23428TFRUZ-TK	RENESAS	类似代替	Dual, 128-Tap, Low Voltage Digitally Controlled Potentiometer (XDCP™); TSSOP14,
ISL23448TFRZ	INTERSIL	功能相似	Quad, 128 Tap, Low Voltage Digitally Controll

与ISL23428TFRUZ-T7A相关器件

型号	品牌	获取价格	描述	数据表
ISL23428TFRUZ-TK	INTERSIL	获取价格	Dual, 128-Tap, Low Voltage Digitally Controlled Potentiometer (XDCP?)
ISL23428TFRUZ-TK	RENESAS	获取价格	Dual, 128-Tap, Low Voltage Digitally Controlled Potentiometer (XDCP™); TSSOP14,
ISL23428TFVZ	INTERSIL	获取价格	Dual, 128-Tap, Low Voltage Digitally Controlled Potentiometer (XDCP?)
ISL23428TFVZ	RENESAS	获取价格	Dual, 128-Tap, Low Voltage Digitally Controlled Potentiometer (XDCP™); TSSOP14,
ISL23428TFVZ-T7A	INTERSIL	获取价格	Dual, 128-Tap, Low Voltage Digitally Controlled Potentiometer (XDCP?)
ISL23428TFVZ-T7A	RENESAS	获取价格	Dual, 128-Tap, Low Voltage Digitally Controlled Potentiometer (XDCP™); TSSOP14,
ISL23428TFVZ-TK	RENESAS	获取价格	Dual, 128-Tap, Low Voltage Digitally Controlled Potentiometer (XDCP™); TSSOP14,
ISL23428TFVZ-TK	INTERSIL	获取价格	Dual, 128-Tap, Low Voltage Digitally Controlled Potentiometer (XDCP?)
ISL23428UFRUZ-T7A	INTERSIL	获取价格	Dual, 128-Tap, Low Voltage Digitally Controlled Potentiometer (XDCP?)
ISL23428UFRUZ-T7A	RENESAS	获取价格	Dual, 128-Tap, Low Voltage Digitally Controll

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