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參數(shù)資料
| 型號： | MAX5161 |
| 廠商： | Maxim Integrated Products, Inc. |
| 元件分類： | 通用總線功能 |
| 英文描述： | Dual, 256-Tap, Nonvolatile, I2C-Interface, Digital Potentiometers |
| 中文描述： | 雙路、256抽頭、非易失、I2C接口、數(shù)字電位器 |
| 文件頁數(shù)： | 5/8頁 |
| 文件大小： | 167K |
| 代理商： | MAX5161 |
M
Low-Power Digital Potentiometers
_______________________________________________________________________________________
5
Detailed Desc ription
The MAX5160/MAX5161 consist of resistor arrays with
31 resistive elements. Thirty-two tap points are accessi-
ble to the wiper along the resistor string between H and
L. Logic inputs
CS
, U/
D
, and
INC
determine the posi-
tion of the wiper. With
CS
low and U/
D
high, a high-to-
low transition on
INC
increments the internal counter,
increasing the resistance between W and L. When both
CS
and U/
D
are low, a high-to-low
INC
transition
decrements the internal counter, decreasing the resis-
tance between W and L. At either end (maximum or mini-
mum positions), additional transitions in the direction of
the end points will not change the counter value (the
counter will not wrap around).
The H and L terminals of the MAX5160 are similar to the
two end terminals of a mechanical potentiometer. The
tap W is equivalent to the variable tap (wiper) of the
potentiometer.
The MAX5161 is similar to the MAX5160 except that
CS
internally connects to ground and the wiper terminal (W)
is shorted to the high terminal (H). The MAX5161 acts as
a variable resistor (a potentiometer with the wiper and
one end terminal shorted together).
The MAX5160/MAX5161 feature power-on reset circuit-
ry that sets the wiper position to midscale at power-up.
Applic ations Information
The MAX5160/MAX5161 are intended for circuits
requiring digitally controlled adjustable voltage or
adjustable gain, such as LCD contrast control, where
voltage biasing adjusts the display contrast.
Controlling a S witc h-Mode
LCD Bias Generator
Figure 1 shows an application where the MAX5161 is
used with a MAX1771 to make an adjustable positive
LCD-bias circuit. The output of the MAX1771 is a posi-
tive voltage that is digitally controlled through the
MAX5160/MAX5161. Similarly, Figure 2 shows the
application of the MAX5161 in a digitally controlled
negative LCD-bias circuit along with the MAX774/
MAX775/MAX776.
MAX1771
V
IN
= 5V
REF
SHDN
AGND
GND
N
MTD20N03HDL
7
EXT
CS
FB
L1
22
μ
H
D1
1N5817-22
C4
300
μ
F
C5
C3
0.1
μ
F
5
4
6
1
8
3
2
V+
C1
68
μ
F
V
OUT
= 12V
AT 0.5A
R2
R
SENSE
40m
C2
0.1
μ
F
V
REF
= 1.5V
R1
R
VAR
V
OUT(MAX)
V
REF
= R2 + 1
V
OUT(MIN)
(
R2
)
+ 1
V
REF
=
VAR(MAX)
MAX5161
Figure 1. Adjustable Positive LCD Bias
MAX774
MAX775
MAX776
OUT
V+
SHDN
CS
FB
EXT
GND
P
7
8
C2
0.1
μ
F
R3
0.07
R1
R2
R
VAR
C1
150
μ
F
6
5
2
3
1
REF
4
Q1
Si9435
1N5822/
MBR340
L1
22
μ
H
C4
*
V
IN
C3
0.1
μ
F
V
OUT
*
MAX774 = 330
μ
F, 10V
MAX775, MAX776 = 120
μ
F, 20V
V
OUT(MAX)
OUT(MIN)
V
REF
= R2 , V
REF
= R2
VAR
V
REF
- V
FB
5
μ
A (FOR 2% GAIN-SETTING ACCURACY)
R1 + R
VAR
MAX5161
Figure 2. Adjustable Negative LCD Bias
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX5161LEUT | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX5161LEZT | 制造商:Maxim Integrated Products 功能描述:6 PIN COUNT MQUAD PACKAGE TYPE - Rail/Tube |
| MAX5161LEZT+ | 制造商:Maxim Integrated Products 功能描述:DGTL POTENTIOMETER 32POS 50KOHM SGL 6PIN SOT-23 - Bulk |
| MAX5161LEZT+T | 功能描述:數(shù)字電位計 IC Low-Power Digital Pot RoHS:否 制造商:Maxim Integrated 電阻:200 Ohms 溫度系數(shù):35 PPM / C 容差:25 % POT 數(shù)量:Dual 每 POT 分接頭:256 弧刷存儲器:Volatile 緩沖刷: 數(shù)字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作電源電壓:1.7 V to 5.5 V 電源電流:27 uA 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel |
| MAX5161LEZT+TG071 | 功能描述:數(shù)字電位計 IC Low-Power Digital Pot RoHS:否 制造商:Maxim Integrated 電阻:200 Ohms 溫度系數(shù):35 PPM / C 容差:25 % POT 數(shù)量:Dual 每 POT 分接頭:256 弧刷存儲器:Volatile 緩沖刷: 數(shù)字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作電源電壓:1.7 V to 5.5 V 電源電流:27 uA 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel |
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