Datasheet > AS1501

AS1501

更新时间： 2024-01-30 23:48:31

品牌	Logo	应用领域
艾迈斯 - AMSCO		数字电位计
页数	文件大小	规格书
8页	365K
描述
Digital Potentiometer

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中文翻译

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技术参数
数据手册

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AS1501 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：	SOIC
针数：	8	Reach Compliance Code：	unknown
风险等级：	5.64	Base Number Matches：	1

AS1501 数据手册

Data Sheet AS1500/1/2/3

D_X(Dec)

Output State

R_WB(Ω)

255

10061

Full Scale

R_S

128

5100

139

Midscale

1 LSB

Zero-Scale

(Wiper Contact Resistance)

100

Table 7: RDAC-Codes WB

The maximum current through the wiper and terminal B is

5mA. If the current exceeds this limit the internal switches

can degrade or even be damaged. As

potentiometer the resistance R_WAand R_WBare totally

symmetrical. The relation between them is shown in Figure

RDAC

LATCH

AND

a mechanical

R_S

DECODE

R_S=R_NOMINAL/ 256

Figure 5: Equivalent RDAC Circuit

Voltage Output Operation

The AS150x family can easily used in an voltage output

mode, where the output voltage is proportional to an

applied voltage to a given terminal. When 5V are applied to

terminal A and B is set to ground the ouput voltage at the

wiper starts at zero volts up to 1LSB less then 5V. One

LSB of voltage corresponds to the voltage applied at

terminal AB divided through 256 steps of possible wiper

settings. The formula is given by

R_W

V_W(Dx)= (Dx)/256⋅V_AB+ V_B

where V_ABis the voltage applied between terminal A and B,

V_Wis the voltage at the wiper, D_Xis the 8-Bit Code word

and V_Bis the voltage at terminal B. The temperature drift is

significant better than in Rheostat mode, since the

temperature coefficient is determined by the internal

resistor ratio. Therefore the temperature drift is only

15ppm/°C.

CODE -

Figure 4: R_WAand R_WBversa Code

The resistance RWA is the complimentary resistor to RWB

and can be controlled digitally as well. RWA starts at the

maximum value of the nominal resistance and is reduced

with increasing 8-Bit code words. The formula to calculate

RWA is given below:

Applications

The digital potentiometer can replace in many applications

the analog trimming potentiometer. The digital

potentiometer is not sensitive to vibrations and shocks. It

has an extremely small form-factor and can be adjusted

very fast (e.g. AS1500 has an update rate of 600kHz)

Furthermore the temperature drift, resolution and noise are

R_WA(Dx)= (256 - Dx)/256⋅R_AB+ R_W

where R_ABis the nominal resistance between terminal A

and B, R_Wis the wiper resistance and D_Xis the 8-Bit Code

word. In Table 8 the resistor values between the wiper and

terminal B for AS1501 are given for specific codes D_X.

significant better and cannot be achieved with

mechanical trimming potentiometer. Due to the

programmability the resistor settings can be stored in the

system memory, so that after a power down the exact

settings can be recalled easily.

D_X(Dec)

Output State

Full Scale

Midscale

1 LSB

Zero-Scale

R_WA(Ω)

5050

10011

10050

255

128

All analog signals must remain within 0 to VDD range. For

standard potentiometer applications the wiper output can

be used directly. In the case of a low impedance load a

buffer shall be used.

Table 8: RDAC-Codes WA

Revision 1.0, Oct 2004

Page 6 of 8

1...3 4 567 8

中文翻译

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与AS1501相关器件

型号	品牌	获取价格	描述	数据表
AS150-12	ASTRODYNE	获取价格	150W Single Output Switching Power Supply
AS15013.5	ASTRODYNE	获取价格	150W Single Output Switching Power Supply
AS150-15	ASTRODYNE	获取价格	150W Single Output Switching Power Supply
AS150-15-230E25	MOTIONKING	获取价格	AC Servo Motors
AS1501-7PB1	BEL	获取价格	DC-DC Regulated Power Supply Module, 1 Output, Hybrid, METAL, CASE S02, MODULE
AS1501-7PB2	BEL	获取价格	DC-DC Regulated Power Supply Module, 1 Output, 100W, Hybrid, METAL, CASE S02, MODULE
AS1501-7PD0	BEL	获取价格	DC-DC Regulated Power Supply Module, 1 Output, 100W, Hybrid, HEAT SINK, METAL, CASE S02, M
AS1501-7PD0B1	BEL	获取价格	DC-DC Regulated Power Supply Module, 1 Output, Hybrid, METAL, CASE S02, MODULE
AS1501-7PD0B2	BEL	获取价格	DC-DC Regulated Power Supply Module, 1 Output, 100W, Hybrid, METAL, CASE S02, MODULE
AS1501-7PD0T	BEL	获取价格	DC-DC Regulated Power Supply Module, 1 Output, Hybrid, HEAT SINK, METAL, CASE S02, MODULE

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