Datasheet > AD5172BRM50-R2

AD5172BRM50-R2

更新时间： 2024-01-17 12:42:20

品牌	Logo	应用领域
亚德诺 - ADI		光电二极管转换器电阻器
页数	文件大小	规格书
19页	315K
描述
IC DUAL 50K DIGITAL POTENTIOMETER, 2-WIRE SERIAL CONTROL INTERFACE, 256 POSITIONS, PDSO10, 3 X 4.90 MM, MO-187BA, MSOP-10, Digital Potentiometer

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技术参数
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AD5172BRM50-R2 技术参数

是否无铅：	含铅	是否Rohs认证：	不符合
生命周期：	Obsolete	零件包装代码：	TSSOP
包装说明：	3 X 4.90 MM, MO-187BA, MSOP-10	针数：	10
Reach Compliance Code：	not_compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.28
其他特性：	IT CAN ALSO OPERATE FROM 5 V NOMINAL SUPPLY	标称带宽：	0.1 kHz
控制接口：	2-WIRE SERIAL	转换器类型：	DIGITAL POTENTIOMETER
JESD-30 代码：	S-PDSO-G10	JESD-609代码：	e0
长度：	3 mm	功能数量：	2
位置数：	256	端子数量：	10
最高工作温度：	125 °C	最低工作温度：	-40 °C
封装主体材料：	PLASTIC/EPOXY	封装代码：	TSSOP
封装等效代码：	TSSOP10,.19,20	封装形状：	SQUARE
封装形式：	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	峰值回流温度（摄氏度）：	NOT SPECIFIED
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：	5.5 V	最小电阻器端电压：
座面最大高度：	1.1 mm	子类别：	Digital Potentiometers
标称供电电压：	3 V	表面贴装：	YES
技术：	CMOS	标称温度系数：	35 ppm/ °C
温度等级：	AUTOMOTIVE	端子面层：	TIN LEAD
端子形式：	GULL WING	端子节距：	0.5 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	NOT SPECIFIED
标称总电阻：	50000 Ω	宽度：	3 mm
Base Number Matches：	1

AD5172BRM50-R2 数据手册

AD5172/AD5173

Preliminary Technical Data

Table 8. R_WBvs. Codes; R_AB= 10 kΩ and

the A Terminal Is Opened

potentiometer mode. The most common configuration is the

voltage divider operation (Figure 29).

D (Dec)

R_WB(Ω)

9,9ꢁ1

5,0ꢁ0

Output State

255

128

Full Scale (R_AB– 1 LSB + R_W)

Midscale

1 LSB

ꢁ0

Zero Scale (Wiper Contact Resistance)

Since a finite wiper resistance of 60 Ω is present in the zero-

scale condition, care should be taken to limit the current flow

between W and B in this state to a maximum pulse current of

no more than 20 mA. Otherwise, degradation or possible

destruction of the internal switch contact can occur.

Figure 29. Potentiometer Mode Configuration

The transfer function can be found as

256

R_AB+ 2R_W

R_AB+ R_W

Similar to the mechanical potentiometer, the resistance of the

RDAC between the wiper W and terminal A also produces a

complementary resistance R_WA(AD5172 only). When these

terminals are used, the B terminal can be opened or shorted to

W. Setting the resistance value for R_WAstarts at a maximum

value of resistance and decreases as the data loaded in the latch

increases in value. The general equation for this operation is

V_W(D) =

V_A

(AD5172 only) (3)

If we ignore the effect of the wiper resistance, the transfer

function is simply

256

256 − D

V_W(D) =

V_A

(AD5172 only)

(4)

R_WA(D) =

R_AB+ R_W(AD5172 only) (2)

256

Table 9. R_WAvs. Codes; R_AB=10 kΩ and

Unlike in rheostat mode operation where the absolute tolerance

is high, potentiometer mode operation yields an almost ratio-

metric function of D/256 with a relatively small error

contributed by the R_Wterms, and therefore the tolerance effect is

almost cancelled. Although the thin film step resistor R_Sand CMOS

switches resistance R_Whave very different temperature coefficients,

the ratio-metric adjustment also reduces the overall temperature

coefficient effect to 5 ppm/^oC, except at low value codes where R_W

dominates.

B Terminal Is Opened

D (Dec)

R_WA(Ω)

Output State

Full Scale

Midscale

1 LSB

255

128

5,0ꢁ0

9,9ꢁ1

10,0ꢁ0

Zero Scale

The typical distribution of the resistance tolerance from device

to device is process lot dependent, and it is possible to have

30% tolerance.

Potentiometer mode operations include others such as op amp

input, feedback resistor networks, and other voltage scaling

applications. A, W, and B terminals can in fact be input or output

terminals provided that |V_AB|, |V_WA|, and |V_WB| do not exceed

V_DDto GND.

SD BIT

R_S

ESD PROTECTION

Digital inputs SDA and SCL are protected with a series input

resistor and parallel Zener ESD structures (Figure30).

R_S

340Ω

LOGIC

RDAC

LATCH

R_S

Figure30. ESD Protection of Digital Pins

AND

DECODER

TERMINAL VOLTAGE OPERATING RANGE

Figure 28. Equivalent RDAC Circuit (A terminal for AD5172 only)

There are also ESD protection diodes between V_DDand the

RDAC terminals. The V_DDof AD5172/73 therefore defines their

voltage boundary conditions, see Figure31. Supply signals

Potentiometer Mode Operation (AD5172 only)

If all three terminals are used, the operation is called the

Rev. PrF 8/14/03 | Page 10 of 19

1...7 8 91011 12 13...19

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与AD5172BRM50-R2相关器件

型号	品牌	获取价格	描述	数据表
AD5172BRM50-RL7	ADI	获取价格	256-Position One-Time Programmable Dual-Channel I2C Digital Potentiometers
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AD5172BRMZ1002	ADI	获取价格	256-Position, One-Time Programmable, Dual-Channel, I2C Digital Potentiometers
AD5172BRMZ100-RL72	ADI	获取价格	256-Position, One-Time Programmable, Dual-Channel, I2C Digital Potentiometers
AD5172BRMZ102	ADI	获取价格	256-Position, One-Time Programmable, Dual-Channel, I2C Digital Potentiometers
AD5172BRMZ10-RL72	ADI	获取价格	256-Position, One-Time Programmable, Dual-Channel, I2C Digital Potentiometers
AD5172BRMZ2.5	ADI	获取价格	256-Position, One-Time Programmable, Dual Channel, I<sup>2</sup>C Digital Pote
AD5172BRMZ2.52	ADI	获取价格	256-Position, One-Time Programmable, Dual-Channel, I2C Digital Potentiometers
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