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| 型号： | MAX5452EUB+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 11/12页 |
| 文件大小： | 0K |
| 描述： | IC DGTL POT DUAL 256-TAP 10-UMAX |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| 接片： | 256 |
| 电阻（欧姆）： | 50k |
| 电路数： | 2 |
| 温度系数： | 标准值 35 ppm/°C |
| 存储器类型： | 易失 |
| 接口： | 4 线（芯片选择，递增，增/减） |
| 电源电压： | 2.7 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 10-µMAX |
| 包装： | 管件 |
| 产品目录页面： | 1399 (CN2011-ZH PDF) |
MAX5450–MAX5455
Detailed Description
The MAX5450–MAX5455 contain two independent
resistor arrays each with 255-resistive elements. 256-
tap points are accessible to the wiper along the resistor
arrays between H and L (Figure 2). Power-on reset cir-
cuitry sets the wiper to midscale (position 127) at
power-up.
Logic inputs CS, U/D, and INC determine the wiper
position of the MAX5450–MAX5455. With CS low and
U/D high, a high-to-low (falling edge) transition on INC,
increments the internal counter, which increases 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 resistance between W
and L (Figure 1). The wiper performs a make-before-
break transition ensuring that there is never an open
circuit during a transition from one resistor tap to anoth-
er. When the wiper is at either end (max/min) of the
resistor array, additional transitions in the direction of
the endpoint will not change the counter value (the
counter will not wrap around).
The MAX5450/MAX5452/MAX5454 are similar to the
MAX5451/MAX5453/MAX5455 except for internal con-
nections. The MAX5450/MAX5452/MAX5454 internally
connect INC1 to INC2, U/D1 to U/D2, W1 to H1, and
W2 to H2 (Figures 3 and 4). The internal connections
configure the MAX5450/MAX5452/MAX5454 to be vari-
able resistors.
Applications Information
The MAX5450–MAX5455 are ideal for adjustable volt-
age or adjustable gain circuits where accurate
adjustable resistances are required.
Adjustable Current to Voltage Converter
Figure 5 shows the MAX5450/MAX5452/MAX5454 with
a MAX4250 low-noise op amp to fine-tune a current to
voltage converter. The physical sizes of both devices
minimize circuit space.
Adjustable Gain Amplifier
Figures 6a and 6b shows the MAX5450–MAX5455 digi-
tally adjusting the gain of the MAX4493 general-pur-
pose, dual supply op amp. Figure 6a shows the
MAX5450/MAX5452/MAX5454 variable resistor in
series with a resistor to ground to form the adjustable
gain control. Figure 6b shows the MAX5451/MAX5453/
MAX5455 as a 3-terminal potentiometer. In these appli-
cations the low 5ppm/°C ratiometric tempco allows for
a very stable adjustable gain over temperature.
Adjustable Linear Regulator
In Figure 7, the MAX5450/MAX5452/MAX5454 is shown
digitally adjusting the output voltage of the MAX8866
dual linear regulator. In this circuit, the MAX5450/
MAX5452/MAX5454 is connected in series with a resis-
tor to ground to form the adjustable feedback stage.
The 8-bit MAX5450/MAX5452/MAX5454 allows precise
tuning of the output voltage.
Dual, 256-Tap, Up/Down Interface,
Digital Potentiometers
8
_______________________________________________________________________________________
Figure 1. Digital Interface and Timing diagram
tID
tIW
tDI
tCI
tIL
tIH
tIC
CS_
W_
U/D_
INC_
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX5452EUB+ | 功能描述:数字电位计 IC Dual 256-Tap Up/Down Interface RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel |
| MAX5452EUB+T | 功能描述:数字电位计 IC Dual 256-Tap Up/Down Interface RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel |
| MAX5452EUB-T | 功能描述:数字电位计 IC RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel |
| MAX5453EUD | 功能描述:数字电位计 IC RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel |
| MAX5453EUD+ | 功能描述:数字电位计 IC Dual 256-Tap Up/Down Interface RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel |
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