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參數(shù)資料
| 型號： | MAX5474EKA+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 11/12頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC POT DGTL 32-TAP NV SOT23-8 |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 接片： | 32 |
| 電阻（歐姆）： | 50k |
| 電路數(shù)： | 1 |
| 溫度系數(shù)： | 標(biāo)準(zhǔn)值 35 ppm/°C |
| 存儲器類型： | 非易失 |
| 接口： | 3 線串行（芯片選擇，遞增，增/減） |
| 電源電壓： | 2.7 V ~ 5.25 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | SOT-23-8 |
| 供應(yīng)商設(shè)備封裝： | SOT-23-8 |
| 包裝： | 標(biāo)準(zhǔn)包裝 |
| 產(chǎn)品目錄頁面： | 1399 (CN2011-ZH PDF) |
| 其它名稱： | MAX5474EKA+TDKR |
MAX5471/MAX5472/MAX5474/MAX5475
32-Tap, Nonvolatile, Linear-Taper Digital
Potentiometers in SOT23
8
_______________________________________________________________________________________
Standby Mode
The MAX5471/MAX5472/MAX5474/MAX5475 are
always in standby mode, except during the transition of
a logic input or while the wiper position is being stored.
When in standby mode, the static supply current is
reduced to less than 1A and the resistive terminals (H,
W, and L) are unaffected.
Applications Information
The MAX5471/MAX5472/MAX5474/MAX5475 are
intended for circuits requiring digitally controlled
adjustable resistance, such as LCD contrast control
(where voltage biasing adjusts the display contrast), or
programmable filters with adjustable gain and/or cutoff
frequency.
Positive LCD Bias Control
Figures 4 and 5 show an application where the voltage-
divider or variable resistor is used to make an
adjustable, positive LCD-bias voltage. The op amp pro-
vides buffering and gain to the resistor-divider network
made by the potentiometer (Figure 4) or to a fixed
resistor and a variable resistor (Figure 5).
Programmable Filter
Figure 6 shows the configuration of 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):
G
R
f
RC
C
=+
=
××
1
2
1
23
π
CS
U/
DINC
W
LL
↓
Decrement
LH
↓
Increment
LX
↑
No change
H
X
No change
↓
X
No change
↑
X
L
Position not stored
↑
X
H
Position stored
Truth Table
↓ = High-to-low transition.
↑ = Low-to-high transition.
X = Don’t care.
32-POSITION
DECODER
UP/DOWN
COUNTER
NONVOLATILE
MEMORY
VDD
GND
INC
H
5
2
6
3
4
RW
CS
1
S32
S31
S30
S3
S2
S1
MAX5471
MAX5472
U/D
R31
R30
R2
R1
Figure 2. MAX5471/MAX5472 Functional Diagram
32-POSITION
DECODER
UP/DOWN
COUNTER
NONVOLATILE
MEMORY
VDD
GND
H
6
3
2
4
5
RW
1
S32
S31
S30
S3
S2
S1
MAX5474
MAX5475
U/D
R31
R30
R2
R1
CS
INC
7
W
8
L
Figure 3. MAX5474/MAX5475 Functional Diagram
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX5474EVKIT+ | 功能描述:其他開發(fā)工具 MAX5474 Eval Kit RoHS:否 制造商:Parallax 產(chǎn)品:ELEV-8 Hex Upgrade Kits 類型:Robotics 工具用于評估:ELEV-8 Quadcopter 工作電源電壓: |
| MAX5475EKA | 制造商:Maxim Integrated Products 功能描述:32-TAP NON-VOLATILE LINEAR-TAPER - Rail/Tube |
| MAX5475EKA+ | 制造商:Maxim Integrated Products 功能描述:DGTL POTENTIOMETER 32POS 100KOHM SGL 8PIN SOT-23 - Rail/Tube 制造商:Maxim Integrated Products 功能描述:32-TAP NON-VOLATILE LINEAR-TAPER |
| MAX5475EKA+T | 功能描述:數(shù)字電位計(jì) IC 32-Tap Nonvolatile Linear-Taper 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 |
| MAX5475EKA-T | 功能描述:數(shù)字電位計(jì) IC 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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