Datasheet > AD5222BR100

AD5222BR100

更新时间： 2024-02-12 10:42:46

品牌	Logo	应用领域
罗彻斯特 - ROCHESTER		光电二极管商用集成电路
页数	文件大小	规格书
11页	856K
描述
2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO14, SOIC-14

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AD5222BR100 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：	SOIC
包装说明：	SOP,	针数：	14
Reach Compliance Code：	unknown	风险等级：	5.61
其他特性：	CAN ALSO WORK WITH 5V SUPPLY	商用集成电路类型：	VOLUME CONTROL CIRCUIT
谐波失真：	0.005%	JESD-30 代码：	R-PDSO-G14
JESD-609代码：	e0	长度：	8.65 mm
湿度敏感等级：	1	信道数量：	2
功能数量：	1	端子数量：	14
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：	SOP
封装形状：	RECTANGULAR	封装形式：	SMALL OUTLINE
峰值回流温度（摄氏度）：	240	认证状态：	COMMERCIAL
座面最大高度：	1.75 mm	最大供电电压 (Vsup)：	2.7 V
最小供电电压 (Vsup)：	2.3 V	表面贴装：	YES
温度等级：	INDUSTRIAL	端子面层：	TIN LEAD
端子形式：	GULL WING	端子节距：	1.27 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	30
宽度：	3.9 mm	Base Number Matches：	1

AD5222BR100 数据手册

AD5222

PROGRAMMING THE VARIABLE RESISTOR

Rheostat Operation

The R_BAtemperature coefficient increases as the wiper is pro-

grammed near the B-terminal due to the larger percentage

contribution of the wiper contact switch resistance, which has a

0.5%/°C temperature coefficient. Figures 9 and 10 show the

effect of the wiper contact resistance as a function of code setting.

The nominal resistance of the RDAC between Terminals A and

B are available with values of 10 kΩ, 50 kΩ, 100 kΩ, and 1 MΩ

The final three characters of the part number determine the

nominal resistance value, e.g., 10 kΩ = 10; 50 kΩ = 50; 100 kΩ

= 100; 1 MΩ = 1M. The nominal resistance (R_AB) of the VR

has 128 contact points accessed by the wiper terminal, plus the

B terminal contact. At power ON, the resistance from the wiper

to either end Terminal A or B is approximately equal. Pulsing

the CLK pin will increase the resistance from the wiper W to

Terminal B by one unit of R_Sresistance, see Figure 33. The

resistance R_WBis determined by the number of pulses applied to

the clock pin. Each segment of the internal resistor string has a

nominal resistance value of R_S= R_AB/128, which becomes 78 Ω

in the case of the 10 kΩ AD5222BR10 product. Care should be

taken to limit the current flow between W and B in the direct

contact state (R_WBcode = 0) to a maximum value of 20 mA to

avoid degradation or possible destruction of the internal switch

contact.

PROGRAMMING THE POTENTIOMETER DIVIDER

Voltage Output Operation

The digital potentiometer easily generates an output voltage

proportional to the input voltage applied to a given terminal.

For example connecting A-terminal to 5 V and B-terminal to

ground produces an output voltage at the wiper which can be

any value starting at zero volts up to 1 LSB less than 5 V. Each

LSB of voltage is equal to the voltage applied across Terminals

AB divided by the 128-position resolution of the potentiometer

divider. The general equation defining the output voltage with

respect to ground for any given input voltage applied to Termi-

nals AB is:

V_W(D) = D/128 × V_AB+ V_B

(1)

D represents the current contents of the internal up/down counter.

Like the mechanical potentiometer the RDAC replaces, it is

totally symmetrical (see Figure 3). The resistance between the

wiper W and Terminal A also produces a digitally controlled

resistance R_WA. When these terminals are used the B-terminal

should be tied to the wiper.

Operation of the digital potentiometer in the divider mode

results in more accurate operation over temperature. Here the

output voltage is dependent on the ratio of the internal resistors

not the absolute value, therefore, the drift improves to 20 ppm/°C.

The typical part-to-part distribution of R_BAis process-lot-

dependent having a ± 30% variation. The change in R_BAwith

temperature has a –35 ppm/°C temperature coefficient.

REV. 0

–9–

1...7 8 91011

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AD5222BR10-REEL7	ROCHESTER	2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO14, SOIC-14	获取价格
AD5222BR1M	ADI	Increment/Decrement Dual Digital Potentiometer	获取价格
AD5222BR50	ADI	Increment/Decrement Dual Digital Potentiometer	获取价格
AD5222BRU10	ADI	Increment/Decrement Dual Digital Potentiometer	获取价格
AD5222BRU10	ROCHESTER	2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO14, TSSOP-14	获取价格
AD5222BRU100	ADI	Increment/Decrement Dual Digital Potentiometer	获取价格

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