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AD5260BRU50 PDF预览

AD5260BRU50

更新时间： 2024-02-20 07:52:06
品牌 Logo 应用领域
亚德诺 - ADI 电位器
页数 文件大小 规格书
20页 841K
描述
1-/2-Channel 15 V Digital Potentiometers

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AD5260BRU50 技术参数

是否Rohs认证： 不符合生命周期：Obsolete
零件包装代码：TSSOP包装说明：TSSOP-14
针数：14Reach Compliance Code：not_compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.35其他特性：IT CAN ALSO OPERATE FROM A SINGLE 4.5V TO 16.5V SUPPLY; ALSO REQUIRES A +2.7V TO +5.5V LOGIC SUPPLY
标称带宽：0.13 kHz控制接口：3-WIRE SERIAL
转换器类型：DIGITAL POTENTIOMETERJESD-30 代码：R-PDSO-G14
JESD-609代码：e0长度：5 mm
湿度敏感等级：1标称负供电电压：-5 V
功能数量：1位置数：256
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：TSSOP封装等效代码：TSSOP14,.25
封装形状：RECTANGULAR封装形式：SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
峰值回流温度（摄氏度）：240电源：5/15/+-5 V
认证状态：Not Qualified电阻定律：LINEAR
最大电阻容差：30%最大电阻器端电压：5 V
最小电阻器端电压：-5 V座面最大高度：1.2 mm
子类别：Digital Potentiometers标称供电电压：5 V
表面贴装：YES标称温度系数：35 ppm/ °C
温度等级：INDUSTRIAL端子面层：Tin/Lead (Sn85Pb15)
端子形式：GULL WING端子节距：0.65 mm
端子位置：DUAL处于峰值回流温度下的最长时间：30
标称总电阻：50000 Ω宽度：4.4 mm
Base Number Matches：1

AD5260BRU50 数据手册

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AD5260/AD5262  
Similar to the previous example, in the simpler (and much more  
usual) case, where K = 1, a single digital pot AD5260, and U1  
is replaced by a matched pair of resistors to apply Vi and – Vi at  
the ends of the digital pot. The relationship becomes:  
5V  
1
U1  
V
IN  
AD5260  
5V  
3
V
OUT  
A
W
Ê
Ë
R2ˆ Ê 2D2  
ˆ
¯
GND  
2
V
B
AD8601  
A1  
VO = 1+  
- 1 ¥Vi  
O
Á
˜ Á  
˜
(6)  
R1 256  
¯ Ë  
AD1582  
If R2 is large, a few picofarad compensation capacitors may be  
needed to avoid any gain peaking.  
Figure 15. Programmable Voltage Reference  
8-Bit Bipolar DAC  
Figure 16 shows a low cost 8-bit bipolar DAC. It offers the same  
number of adjustable steps but not the precision of conventional  
DACs. The linearity and temperature coefficients, especially at low  
values codes, are skewed by the effects of the digital potentiometer  
wiper resistance. The output of this circuit is:  
Table VIII shows the result of adjusting D, with A2 configured as a  
unity gain, a gain of 2, and a gain of 10. The result is a bipolar  
amplifier with linearly programmable gain and 256-step resolution.  
Table VIII. Result of Bipolar Gain Amplifier  
D
R1 = •, R2 = 0  
R1 = R2  
R2 = 9R1  
0
64  
128  
192  
255  
–1  
–0.5  
0
0.5  
0.968  
–2  
–1  
0
–10  
–5  
0
Ê 2D  
Ë 256  
ˆ
¯
VO  
=
- 1 ¥V  
Á
˜
(4)  
REF  
1
5
+5V  
1.937  
9.680  
AD5260  
V
i
U2  
V
O
OP2177  
Programmable Voltage Source with Boosted Output  
For applications that require high current adjustment such as a  
laser diode driver or turnable laser, a boosted voltage source can  
be considered (see Figure 18).  
U1  
W
B
V
IN  
A2  
A
–5V  
R
R
V
OUT  
+5V  
؊5V  
+5V  
W1  
REF  
REF  
TRIM  
V
i
GND  
V
O
ADR425  
5V  
OP2177  
10k⍀  
R1  
P1  
R
BIAS  
A
B
C
C
A1  
W
–5V  
U1  
N1  
SIGNAL  
LO  
A1  
I
L
Figure 16. 8-Bit Bipolar DAC  
Bipolar Programmable Gain Amplifier  
For applications that require bipolar gain, Figure 17 shows one  
implementation. Digital potentiometer U1 sets the adjustment  
range. The wiper voltage at W2 can therefore be programmed  
between Vi and –KVi at a given U2 setting. Configuring A2 in  
the noninverting mode allows linear gain and attenuation. The  
transfer function is:  
U1= AD5260  
A1= AD8601, AD8605, AD8541  
P1= FDP360P, NDS9430  
N1= FDV301N, 2N7002  
Figure 18. Programmable Boosted Voltage Source  
In this circuit, the inverting input of the op amp forces the VO to be  
equal to the wiper voltage set by the digital potentiometer. The  
load current is then delivered by the supply via the P-Ch FET P1.  
The N-Ch FET N1 simplifies the op amp driving requirement.  
A1 needs to be the rail-to-rail input type. Resistor R1 is needed to  
prevent P1 from not turning off once it is on. The choice of R1 is a  
balance between the power loss of this resistor and the output turn-  
off time. N1 can be any general-purpose signal FET; on the other  
hand, P1 is driven in the saturation state, and therefore its power  
Ê
ˆ
VO  
Vi  
Ê
Ë
R2ˆ  
D2  
256  
= 1+  
¥
¥ 1+ K - K  
(
)
Á
˜
(5)  
Á
˜
R1  
¯
Ë
¯
where K is the ratio of RWB1/RWA1 set by U1.  
V
DD  
ADU52262  
V
OP2177  
O
handling must be adequate to dissipate (V – VO) ꢂ IL power. This  
i
W2  
B2  
circuit can source a maximum of 100 mA at 5 V supply. Higher  
current can be achieved with P1 in a larger package. Note, a single  
N-Ch FET can replace P1, N1, and R1 altogether. However, the out-  
put swing will be limited unless separate power supplies are used.  
For precision application, a voltage reference such as ADR423,  
ADR292, and AD1584 can be applied at the input of the digital  
potentiometer.  
R2  
R1  
C1  
A2  
A2  
A1  
V
SS  
B1  
W1  
V
i
–KV  
i
V
DD  
ADU51262  
OP2177  
A1  
Programmable 4-to-20 mA Current Source  
A programmable 4-to-20 mA current source can be implemented  
with the circuit shown in Figure 19. REF191 is a unique low  
supply headroom and high current handling precision reference  
V
SS  
Figure 17. Bipolar Programmable Gain Amplifier  
REV. 0  
–15–  
1...12131415161718...20

中文翻译

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AD5260BRU50 替代型号

型号 品牌 替代类型 描述 数据表
AD5260BRUZ50-REEL7 ADI

完全替代

 1-/2-Channel 15 V Digital Potentiometer
AD5260BRUZ50 ADI

完全替代

 1-/2-Channel 15 V Digital Potentiometer
AD5260BRU50-REEL7 ADI

完全替代

 1-/2-Channel 15 V Digital Potentiometers

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