Datasheet > DS1845B-050+

DS1845B-050+

更新时间： 2024-02-06 19:26:48

品牌	Logo	应用领域
美信 - MAXIM		转换器电阻器
页数	文件大小	规格书
14页	208K
描述
Digital Potentiometer, 2 Func, 50000ohm, 2-wire Serial Control Interface, 256 Positions, PBGA16, 4 X 4 MM, LEAD FREE, CSBGA-16

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DS1845B-050+ 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Active	零件包装代码：	BGA
包装说明：	BGA, BGA16,4X4,40	针数：	16
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	Factory Lead Time：	8 weeks
风险等级：	1.54	其他特性：	NONVOLATILE MEMORY; OTHER RESISTOR VALUE IS 10000 OHM; IT CAN ALSO OPERATE FROM A 5V SUPPLY
控制接口：	2-WIRE SERIAL	转换器类型：	DIGITAL POTENTIOMETER
JESD-30 代码：	S-PBGA-B16	JESD-609代码：	e3
长度：	4 mm	湿度敏感等级：	3
功能数量：	2	位置数：	256
端子数量：	16	最高工作温度：	85 °C
最低工作温度：	-40 °C	封装主体材料：	PLASTIC/EPOXY
封装代码：	BGA	封装等效代码：	BGA16,4X4,40
封装形状：	SQUARE	封装形式：	GRID ARRAY
峰值回流温度（摄氏度）：	260	电源：	3/5 V
认证状态：	Not Qualified	电阻定律：	LINEAR
最大电阻容差：	20%	最大电阻器端电压：	3.5 V
最小电阻器端电压：	-0.5 V	座面最大高度：	1.5 mm
子类别：	Digital Potentiometers	标称供电电压：	3 V
表面贴装：	YES	标称温度系数：	30 ppm/ °C
温度等级：	INDUSTRIAL	端子面层：	Matte Tin (Sn)
端子形式：	BALL	端子节距：	1 mm
端子位置：	BOTTOM	处于峰值回流温度下的最长时间：	30
标称总电阻：	50000 Ω	宽度：	4 mm
Base Number Matches：	1

DS1845B-050+ 数据手册

DS1845

DS1845 BLOCK DIAGRAM Figure 1

248 BYTES

VCC

GND

EEPROM

MEMORY

2-WIRE

INTERFACE

POTENTIOMETER 0

6 RESERVED

BYTES

CONTROL

DATA

SDA

100

Position

Pot

SCL

1 BYTE WIPER

SETTING

POT 0

POTENTIOMETER 1

1 BYTE WIPER

SETTING

POT 1

256

Position

Pot

MEMORY ORGANIZATION

The DS1845’s serial EEPROM is internally organized with 256 words of 1 byte each. Each word requires

an 8-bit address for random word addressing. The byte at address F9h determines the wiper setting for

potentiometer 0, which contains 100 positions. Writing values above 63h to this address sets the wiper to

its uppermost position. The byte at address F8h determines the wiper setting for potentiometer 1, which

contains 256 positions (00h to FFh). The factory default wiper position for both potentiometers is FFh.

Memory locations 00h to F7h are factory programmed to 00h. Address locations FAh though FFh are

reserved and should not be written.

DEVICE OPERATION

Clock and Data Transitions: The SDA pin is normally pulled high with an external resistor or device.

Data on the SDA pin may only change during SCL low time periods. Data changes during SCL high

periods will indicate a start or stop conditions depending on the conditions discussed below. Refer to the

timing diagram Fig 2 for further details.

Start Condition: A high-to-low transition of SDA with SCL high is a start condition which must

precede any other command. Refer to the timing diagram Fig 2 for further details.

Stop Condition: A low-to-high transition of SDA with SCL high is a stop condition. After a read

sequence, the stop command places the DS1845 into a low-power mode. Refer to the timing diagram Fig

2 for further details.

Acknowledge: All address and data byte are transmitted via a serial protocol. The DS1845 pulls the

SDA line low during the ninth clock pulse to acknowledge that it has received each word.

Standby Mode: The DS1845 features a low-power mode that is automatically enabled after power-on,

after a stop command, and after the completion of all internal operations.

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与DS1845B-050+相关器件

型号	品牌	描述	获取价格	数据表
DS1845B-050+T&R	MAXIM	Digital Potentiometer, 2 Func, 50000ohm, 2-wire Serial Control Interface, 256 Positions, P	获取价格
DS1845B-100	DALLAS	Dual NV Potentiometer and Memory	获取价格
DS1845B-100	MAXIM	Digital Potentiometer, 2 Func, 100000ohm, 2-wire Serial Control Interface, 256 Positions,	获取价格
DS1845B-100+	MAXIM	Digital Potentiometer, 2 Func, 100000ohm, 2-wire Serial Control Interface, 256 Positions,	获取价格
DS1845E-010	DALLAS	Dual NV Potentiometer and Memory	获取价格
DS1845E-010	MAXIM	Digital Potentiometer, 2 Func, 10000ohm, 2-wire Serial Control Interface, 256 Positions, P	获取价格

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