Datasheet > ISL23325

ISL23325

更新时间： 2023-12-20 18:44:39

品牌	Logo	应用领域
瑞萨 - RENESAS		/
页数	文件大小	规格书
20页	1259K
描述
Dual, 256-Tap, Low Voltage Digitally Controlled Potentiometer (XDCP?)

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ISL23325 数据手册

DATASHEET

ISL23325

FN7870

Rev 1.00

September 23, 2015

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

The ISL23325 is a volatile, low voltage, low noise, low power,

Features

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

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

• Two potentiometers per package

and control logic on a monolithic CMOS integrated circuit.

• 256 resistor taps

• 10kΩ 50kΩ or 100kΩ total resistance

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 I C

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).

• I C serial interface

- No additional level translator for low bus supply

- Three address pins allow up to eight devices per bus

• Maximum supply current without serial bus activity

(standby)

- 3µA @ V and V

CC LOGIC

= 5V

= 1.7V

The low voltage, low power consumption, and small package

of the ISL23325 make it an ideal choice for use in battery

- 1.7µA @ V and V

LOGIC

• Shutdown Mode

operated equipment. In addition, the ISL23325 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

- Reduces power consumption by disconnecting the DCP

resistor from the circuit

directly to the ISL23325 without passing through a voltage

level shifter.

• 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 = 1.7V to 5.5V analog power supply

- V

LOGIC

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

• Wiper resistance: 70Ω 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

FN7870 Rev 1.00

Page 1 of 20

September 23, 2015

12 3 4 5 6 7...20

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与ISL23325相关器件

型号	品牌	描述	获取价格	数据表
ISL23325TFRUZ-T7A	INTERSIL	Dual, 256-Tap, Low Voltage Digitally Controlled Potentiometer (XDCP?)	获取价格
ISL23325TFRUZ-T7A	RENESAS	Dual, 256-Tap, Low Voltage Digitally Controlled Potentiometer (XDCP™); TSSOP14,	获取价格
ISL23325TFRUZ-TK	INTERSIL	Dual, 256-Tap, Low Voltage Digitally Controlled Potentiometer (XDCP?)	获取价格
ISL23325TFVZ	INTERSIL	Dual, 256-Tap, Low Voltage Digitally Controlled Potentiometer (XDCP?)	获取价格
ISL23325TFVZ	RENESAS	Dual, 256-Tap, Low Voltage Digitally Controlled Potentiometer (XDCP™); TSSOP14,	获取价格
ISL23325TFVZ-T7A	RENESAS	Dual, 256-Tap, Low Voltage Digitally Controlled Potentiometer (XDCP™); TSSOP14,	获取价格

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