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參數(shù)資料
| 型號： | MAX5128ELA+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 2/14頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC POT DGTL LP 128TAP 8-UDFN |
| 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： | 128 |
| 電阻（歐姆）： | 22k |
| 電路數(shù)： | 1 |
| 溫度系數(shù)： | 標(biāo)準(zhǔn)值 50 ppm/°C |
| 存儲器類型： | 非易失 |
| 接口： | 上/下 |
| 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： | 8-WFDFN |
| 供應(yīng)商設(shè)備封裝： | 8-uDFN（2x2） |
| 包裝： | 標(biāo)準(zhǔn)包裝 |
| 產(chǎn)品目錄頁面： | 1398 (CN2011-ZH PDF) |
| 其它名稱： | MAX5128ELA+TDKR |
MAX5128
Standby Mode
The MAX5128 operates in standby mode while the seri-
al interface is inactive. Programming the MAX5128
increases the average operating current to 400A
(max). When in standby mode, the static supply current
reduces to less than 0.5A (typ).
Power-Up
Upon power-up, the MAX5128 updates the wiper posi-
tion with the data stored in the nonvolatile memory. This
initialization period takes 2s (typ). For proper opera-
tion, limit the supply voltage slew rate to
≥ 10s.
Applications Information
Use the MAX5128 for applications requiring digitally
controlled adjustable resistance or voltage, such as
LCD contrast control (where voltage biasing adjusts the
display contrast), or DC-DC converters with adjustable
outputs. The 22k
Ω end-to-end resistance is divided into
128 tap points of 172
Ω each. Use the MAX5128 in a
voltage-divider or variable-resistor configuration.
VCOM Generator
Figure 5 shows an application using the MAX4238 and
the MAX5128 to generate the VCOM voltage for a LCD
panel. Adjusting the resistor value of the MAX5128
changes the VCOM voltage. Adjusting the VCOM volt-
age changes the contrast for the LCD panel.
DC-DC Converter Applications
Figures 6 and 7 show two applications using the
MAX5128 to adjust the output voltage of a DC-DC con-
verter. Figure 6 shows the MAX5128 in the grounded
potentiometer configuration. Figure 7 shows the
MAX5128 in a floating potentiometer configuration. The
grounded potentiometer configuration forces the output
voltage range of the DC-DC converter to fall within the
supply voltage range of the MAX5128. Use the floating
potentiometer configuration to allow the DC-DC con-
verter’s output to exceed the supply voltage range of
the MAX5128. The floating potentiometer configuration
increases the output voltage range and increases the
precision of the output voltage adjustment range.
LED Bias Adjustment
Figure 8 shows a LED bias adjustment application
using a MAX5128 to set the current of the LEDs that the
MAX1574 drives. Use the MAX5128 for an adjustable
LED current drive of 10mA to 60mA.
Chip Information
PROCESS: BiCMOS
128-Tap, Nonvolatile, Linear-Taper Digital
Potentiometer in 2mm x 2mm DFN Package
10
______________________________________________________________________________________
tIMMU
UP
DN
tIMMU
PULSES WITH WIDTHS LESS THAN tIMMU ARE IGNORED.
Figure 4. Glitch-Immunity Timing Diagram
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| MAX5128EVCMAXQU+ | 功能描述:數(shù)字電位計(jì) IC MAX5128 Evaluation Kit/Evaluation System 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 |
| MAX5128EVKIT+ | 功能描述:數(shù)字電位計(jì) IC MAX5128 Evaluation Kit/Evaluation System 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 |
| MAX512C/D | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Low-Cost, Triple, 8-Bit Voltage-Output DACs with Serial Interface |
| MAX512CPD | 功能描述:數(shù)模轉(zhuǎn)換器- DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
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