Datasheet > 转换器 > 数字电位计> ADN2850ACP25-RL7

ADN2850ACP25-RL7

更新时间： 2024-11-08 22:35:47

品牌	Logo	应用领域
亚德诺 - ADI		转换器数字电位计电阻器
页数	文件大小	规格书
18页	267K
描述
Nonvolatile Memory, Dual 1024 Position Programmable Resistors

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ADN2850ACP25-RL7 数据手册

PRELIMINARY TECHNICAL DATA

Nonvolatile Memory, Dual 1024

Position Programmable Resistors

Preliminary Technical Data

ADN2850

FUNCTIONAL BLOCK DIAGRAM

FEATURES

Dual, 1024 Position Resolution

25K, 250K Ohm Full Scale Resistance

Low Temperature Coefficient -- 35ppm/°C

Nonvolatile Memory¹Preset Maintains Wiper Settings

Wiper Settings Read Back

ADDRESS

RDAC1

DECODE

CLK

SERIAL

INPUT

SDI

EEMEM1

SDO

Linear Increment/Decrement

RDAC1

Log taper Increment/Decrement

SPI Compatible Serial Interface

RDAC2

+3V to +5V Single Supply or ±2.5V Dual Supply

26 bytes User Nonvolatile Memory for Constant Storage with

Current Monitoring Configurable Function

PWR ON

PRESET

EEMEM

CONTROL

EEMEM2

RDY

RDAC1

APPLICATIONS

SONET, SDH, ATM, Gigabit Ethernet, DWDM Laser Diode

Driver Optical Supervisory Systems

CURRENT

MONITOR

26 BYTES

USER EEMEM

GND

GENERAL DESCRIPTION

The ADN2850 provides dual channel, digitally controlled

programmable resistors²with resolution of 1024 positions. These

devices perform the same electronic adjustment function as a

mechanical rheostat. The ADN2850’s versatile programming via a

standard serial interface allows sixteen mode of operations and

adjustment including scratch pad programming, memory storing

and retrieving, increment/decrement, log taper adjustment, wiper

setting readback, and extra user defined EEMEM.

100%

75%

50%

25%

In the scratch pad programming mode, a specific setting can be

programmed directly to the RDAC²register, which sets the

resistance between terminals W-and-B. The RDAC register can

also be loaded with a value previously stored in the EEMEM¹

When changes are made to the RDAC register, the value of the new

setting can be saved into the EEMEM. Thereafter, such value will

be transferred automatically to the RDAC register during system

power ON. It is enabled by the internal preset strobe. EEMEM can

also be retrieved through direct programming and external preset

pin control.

256

512

768

1023

D - Code in De cim al

Other key mode of operations include linear step increment and

decrement commands such that the setting in the RDAC register

can be moved UP or DOWN, one step at a time. For logarithmic

changes in wiper setting, a left/right bit shift command adjusts the

level in ±6dB steps.

Figure 1. R_WB(D) vs Decimal Code

Notes:

The term nonvolatile memory and EEMEM are used interchangebly

The term programmable resistor and RDAC are used interchangebly

The ADN2850 is available in the 5mm x 5mm LFCSP-16 Lead

Frame Chip Scale and thin TSSOP-16 packages. All parts are

guaranteed to operate over the extended industrial temperature

range of -40°C to +85°C.

REV PrH, 13, AUG 2001

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibility is assumed by Analog Devices for its use; nor for any infringements of patents or

other rights of third parties which may result from its use. No license is granted by implication

or otherwise under any patent or patent rights of Analog Devices.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106 U.S.A.

Tel: 617/329-4700 Fax:617/326-8703

12 3 4 5 6 7...18

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与ADN2850ACP25-RL7相关器件

型号	品牌	获取价格	描述	数据表
ADN2850ARU25	ADI	获取价格	Nonvolatile Memory, Dual 1024 Position Programmable Resistors
ADN2850ARU250-REEL7	ADI	获取价格	IC DUAL 250K DIGITAL POTENTIOMETER, 3-WIRE SERIAL CONTROL INTERFACE, 1024 POSITIONS, PDSO1
ADN2850ARU25-REEL7	ADI	获取价格	Nonvolatile Memory, Dual 1024 Position Programmable Resistors
ADN2850BCP25	ADI	获取价格	Nonvolatile Memory, Dual 1024 Position Programmable Resistors
ADN2850BCP250	ADI	获取价格	Nonvolatile Memory, Dual 1024 Position Programmable Resistors
ADN2850BCP250-RL7	ADI	获取价格	Nonvolatile Memory, Dual 1024 Position Programmable Resistors
ADN2850BCP25-RL7	ADI	获取价格	Nonvolatile Memory, Dual 1024 Position Programmable Resistors
ADN2850BCPZ25	ADI	获取价格	Nonvolatile Memory, Dual 1024-Position Digital Resistor
ADN2850BCPZ250	ADI	获取价格	Nonvolatile Memory, Dual 1024-Position Digital Resistor
ADN2850BCPZ250-RL7	ADI	获取价格	Nonvolatile Memory, Dual 1024-Position Digital Resistor

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