Datasheet > AD5204BN10

AD5204BN10

更新时间： 2024-02-12 19:01:05

品牌	Logo	应用领域
亚德诺 - ADI		电位器
页数	文件大小	规格书
11页	176K
描述
4-/6-Channel Digital Potentiometers

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AD5204BN10 技术参数

是否无铅：	含铅	是否Rohs认证：	不符合
生命周期：	Active	零件包装代码：	DIP
包装说明：	DIP,	针数：	24
Reach Compliance Code：	unknown	风险等级：	5.78
其他特性：	CAN ALSO OPERATE FROM +/-2.3V TO +/-2.7V SUPPLY	标称带宽：	0.721 kHz
控制接口：	3-WIRE SERIAL	转换器类型：	DIGITAL POTENTIOMETER
JESD-30 代码：	R-PDIP-T24	JESD-609代码：	e0
长度：	31.75 mm	湿度敏感等级：	NOT APPLICABLE
标称负供电电压：	-2.5 V	功能数量：	4
位置数：	256	端子数量：	24
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：	DIP
封装形状：	RECTANGULAR	封装形式：	IN-LINE
峰值回流温度（摄氏度）：	NOT APPLICABLE	认证状态：	COMMERCIAL
电阻定律：	LINEAR	最大电阻容差：	30%
最大电阻器端电压：	2.7 V	最小电阻器端电压：	-2.3 V
座面最大高度：	5.33 mm	标称供电电压：	2.5 V
表面贴装：	NO	标称温度系数：	700 ppm/ °C
温度等级：	INDUSTRIAL	端子面层：	TIN LEAD
端子形式：	THROUGH-HOLE	端子节距：	2.54 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	NOT APPLICABLE
标称总电阻：	10000 Ω	宽度：	7.62 mm
Base Number Matches：	1

AD5204BN10 数据手册

AD5204/AD5206

OPERATION

data 00_H. This B terminal connection has a wiper contact resis-

tance of 45 Ω. The second connection (10 kΩ part) is the first

tap point located at 84 Ω [= R_BA(nominal resistance)/256 + R_W

= 84 Ω + 45 Ω] for data 01_H. The third connection is the next

tap point representing 78 + 45 = 123 Ω for data 02_H. Each LSB

data value increase moves the wiper up the resistor ladder until

the last tap point is reached at 10006 Ω. The wiper does not

directly connect to the A terminal. See Figure 16 for a simplified

diagram of the equivalent RDAC circuit.

The AD5204/AD5206 provides a four-/six-channel, 256-position

digitally-controlled variable resistor (VR) device. Changing the

programmed VR settings is accomplished by clocking in a 11-

bit serial data word into the SDI (Serial Data Input) pin. The

format of this data word is three address bits, MSB first, fol-

lowed by eight data bits, MSB first. Table I provides the serial

Table I. Serial-Data Word Format

The general transfer equation determining the digitally pro-

grammed output resistance between Wx and Bx is:

ADDR

DATA

B10 B9 B8

B7 B6 B5 B4 B3 B2 B1 B0

_WB(Dx) = (Dx)/256 × R_BA+ R_W

(1)

where Dx is the data contained in the 8-bit RDACx latch, and

R_BAis the nominal end-to-end resistance.

A2 A1 A0

D7 D6 D5 D4 D3 D2 D1 D0

MSB

LSB MSB

LSB

2¹⁰

2⁸2⁷

2⁰

For example, when V_B= 0 V and A terminal is open-circuit, the

following output resistance values will be set for the following

RDAC latch codes (applies to the 10K potentiometer):

See Table IV for the AD5204/AD5206 address assignments to

decode the location of VR latch receiving the serial register data

in Bits B7 through B0. VR outputs can be changed one at a

time in random sequence. The AD5204 presets to a midscale by

asserting the PR pin, simplifying fault condition recovery at

power up. Both parts have an internal power ON preset that

places the wiper in a preset midscale condition at power ON. In

addition, the AD5204 contains a power shutdown SHDN pin

which places the RDAC in a zero power consumption state

where Terminals Ax are open circuited and the wiper Wx is

connected to Bx resulting in only leakage currents being con-

sumed in the VR structure. In shutdown mode the VR latch

settings are maintained, so that, returning to operational mode

from power shutdown, the VR settings return to their previous

resistance values.

Table II.

(DEC)

R_WB-⍀

Output State

255

128

10006

5045

Full Scale

Midscale (PR = 0 Condition)

1 LSB

Zero Scale (Wiper Contact Resistance)

Note that in the zero-scale condition a finite wiper resistance of

45 Ω is present. Care should be taken to limit the current flow

between W and B in this state to a maximum value of 20 mA to

avoid degradation or possible destruction of the internal switch

contact.

Like the mechanical potentiometer the RDAC replaces, it is

totally symmetrical. The resistance between the Wiper W and

SHDN

Terminal A produces a digitally controlled resistance R_WA

When these terminals are used the B terminal should be tied to

the wiper. Setting the resistance value for R_WAstarts at a maxi-

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

latch is increased in value. The general transfer equation for this

operation is:

RDAC

LATCH

_WA(Dx) = (256–Dx)/256 × R_BA+ R_W

(2)

where Dx is the data contained in the 8-bit RDACx latch, and

R_BAis the nominal end-to-end resistance. For example, when

V_A= 0 V and B terminal is tied to the Wiper W the following

output resistance values will be set for the following RDAC

latch codes:

DECODER

Table III.

Figure 16. AD5204/AD5206 Equivalent RDAC Circuit

(DEC)

PROGRAMMING THE VARIABLE RESISTOR

Rheostat Operation

R_WA-⍀

Output State

The nominal resistance of the RDAC between Terminals A and

B are available with values of 10 kΩ, 50 kΩ and 100 kΩ. The

last digits of the part number determine the nominal resistance

value, e.g., 10 kΩ = 10; 100 kΩ = 100. The nominal resistance

(R_AB) of the VR has 256 contact points accessed by the wiper

terminal, plus the B terminal contact. The eight-bit data word

in the RDAC latch is decoded to select one of the 256 possible

settings. The wiper’s first connection starts at the B terminal for

255

128

Full Scale

Midscale (PR = 0 Condition)

1 LSB

5045

10006

10045

Zero Scale

–8–

REV. 0

1...5 6 789 10 11

中文翻译

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AD5204BN10 替代型号

型号	品牌	替代类型	描述	数据表
AD5204BN50	ADI	功能相似	4-/6-Channel Digital Potentiometers
AD5204BN100	ADI	类似代替	4-/6-Channel Digital Potentiometers
AD5203AN10	ADI	功能相似	4-Channel, 64-Position Digital Potentiometer

与AD5204BN10相关器件

型号	品牌	获取价格	描述	数据表
AD5204BN100	ADI	获取价格	4-/6-Channel Digital Potentiometers
AD5204BN50	ADI	获取价格	4-/6-Channel Digital Potentiometers
AD5204BR10	ADI	获取价格	4-/6-Channel Digital Potentiometers
AD5204BR100	ADI	获取价格	4-/6-Channel Digital Potentiometers
AD5204BR100-REEL	ADI	获取价格	4-/6-Channel Digital Potentiometers
AD5204BR10-REEL	ADI	获取价格	4-/6-Channel Digital Potentiometers
AD5204BR50	ADI	获取价格	4-/6-Channel Digital Potentiometers
AD5204BR50-REEL	ADI	获取价格	4-/6-Channel Digital Potentiometers
AD5204BRU10	ADI	获取价格	4-/6-Channel Digital Potentiometers
AD5204BRU100	ADI	获取价格	4-/6-Channel Digital Potentiometers

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