参数资料
型号: MAX5528GUA+T
厂商: Maxim Integrated Products
文件页数: 2/12页
文件大小: 0K
描述: IC POT DGTL 1TIME PROGR 8-UMAX
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,500
接片: 64
电阻(欧姆): 50k
电路数: 1
温度系数: 标准值 35 ppm/°C
存储器类型: 非易失
接口: 2 线串行(芯片选择,增/减)
电源电压: 2.7 V ~ 5.25 V
工作温度: -40°C ~ 105°C
安装类型: 表面贴装
封装/外壳: 8-TSSOP,8-MSOP(0.118",3.00mm 宽)
供应商设备封装: 8-uMAX
包装: 带卷 (TR)
MAX5527/MAX5528/MAX5529
One-Time Programmable, Linear-Taper Digital
Potentiometers
10
______________________________________________________________________________________
Applications Information
Use the MAX5527/MAX5528/MAX5529 in applications
requiring digitally controlled adjustable resistance,
such as LCD contrast control where voltage biasing
adjusts the display contrast, or for programmable filters
with adjustable gain and/or cutoff frequency.
Positive LCD Bias Control
Figures 7 and 8 show an application where the voltage-
divider or variable resistor is used to make an adjustable,
positive LCD bias voltage. The op-amp provides buffer-
ing and gain to the resistor-divider network made by the
potentiometer (Figure 7), or to a fixed resistor and a
variable resistor (Figure 8).
Programmable Filter
Figure 9 shows the configuration for a 1st-order pro-
grammable filter. The gain of the filter is adjusted by
R2, and the cutoff frequency is adjusted by R3. Use the
following equations to calculate the gain (G), and the
-3dB cutoff frequency (fC), only up to frequencies one
decade below the wiper -3dB bandwidth.
Adjustable Voltage Reference
Figure 10 shows the MAX5527/MAX5528/MAX5529
used as the feedback resistors in an adjustable-voltage
reference application.
G
R
f
xR xC
C
=+
=
1
2
1
23
π
VOUT
30V
5V
W
H
L
MAX5527
MAX5528
MAX5529
Figure 7. Positive LCD Bias Control Using a Voltage-Divider
VOUT
30V
5V
W
H
L
MAX5527
MAX5528
MAX5529
Figure 8. Positive LCD Bias Control Using a Variable Resistor
VOUT
R1
W
H
L
R2
VIN
R3
H
W
L
C
MAX5527
MAX5528
MAX5529
5V
Figure 9. Programmable Filter
W
H
L
MAX6160
+5V
GND
VIN
OUT
ADJ
V0 REF
V0 = 1.23V x
100k
FOR THE MAX5527
R2(k
)
V0 = 1.23V x
50k
FOR THE MAX5528
R2(k
)
R1
R2
MAX5527
MAX5528
MAX5529
V0 = 1.23V x
10k
FOR THE MAX5529
R2(k
)
Figure 10. Adjustable Voltage Reference
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