Datasheet > DP7251

DP7251

更新时间： 2024-10-01 01:25:47

品牌	Logo	应用领域
尼得科 - NIDEC		/
页数	文件大小	规格书
15页	168K
描述
Quad Digital Potentiometer

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DP7251 数据手册

DP7251

Quad Digital Potentiometer (DP) with

256 Taps and SPI Interface

FEATURES

DESCRIPTION

Four linear-taper digital potentiometers

254 resistor taps per potentiometer

End to end resistance 50k or 100k

The DP7251 is four Digital Potentiometers

(DPs) integrated with control logic and 16 bytes

of NVRAM memory. Each DP consists of a series

of resistive elements connected between two

externally accessible end points. The tap points

between each resistive element are connected to the

wiper outputs with CMOS switches. A separate 8-bit

control register (WCR) independently controls the

wiper tap switches for each DP. Associated with

each wiper control register are four 8-bit non-volatile

memory data registers (DR) used for storing up to four

wiper settings. Writing to the wiper control register or

any of the non-volatile data registers is via a SPI serial

bus. On power-up, the contents of the first data

automatically loaded into its respective wiper control

Potentiometer control and memory access via

SPI interface

Low wiper resistance, typically 100

Nonvolatile memory storage for up to four

wiper settings for each potentiometer

Automatic recall of saved wiper settings at

power up

2.5 to 6.0 volt operation

Standby current less than 1µA

1,000,000 nonvolatile WRITE cycles

100 year nonvolatile memory data retention

SOIC 24-lead and TSSOP 24-lead

Industrial temperature range

The DP7251 can be used as a potentiometer or as a

two terminal, variable resistor. It is intended for circuit

level or system level adjustments in a wide variety of

applications. It is available in the -40°C to 85°C

industrial operating temperature range and offered in

a 24-lead SOIC and TSSOP package.

For Ordering Information details, see page 14.

PIN CONFIGURATION

FUNCTIONAL DIAGRAM

SOIC 24-Lead (W)

TSSOP 24-Lead (Y)

¯¯¯¯¯

HOLD

23 SCK

22 R_L2

21 R_H2

20 R_W2

19 NC

18 GND

17 R_W1

16 R_H1

15 R_L1

14 A1

SCK

WIPER

CONTROL

REGISTERS

R_W3

R_H3

R_L3

V_CC

R_LO

R_HO

SPI BUS

INTERFACE

7251

NONVOLATILE

DATA

REGISTERS

CONTROL

LOGIC

HOLD

R_WO10

¯¯¯

13 SI

Characteristics subject to change without notice

Doc. No. MD-2017 Rev. F

12 3 4 5 6 7...15

中文翻译

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