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参数资料
| 型号： | MAX5418LETA+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 4/14页 |
| 文件大小： | 0K |
| 描述： | IC POT DGTL 256-TAP I2C 8-TDFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 接片： | 256 |
| 电阻（欧姆）： | 100k |
| 电路数： | 1 |
| 温度系数： | 标准值 35 ppm/°C |
| 存储器类型： | 非易失 |
| 接口： | I²C（设备位址） |
| 电源电压： | 2.7 V ~ 5.25 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-WDFN 裸露焊盘 |
| 供应商设备封装： | 8-TDFN-EP（3x3） |
| 包装： | 标准包装 |
| 产品目录页面： | 1399 (CN2011-ZH PDF) |
| 其它名称： | MAX5418LETA+TDKR |
MAX5417/MAX5418/MAX5419
256-Tap, Nonvolatile, I2C-Interface,
Digital Potentiometers
12
______________________________________________________________________________________
ADDRESS BYTE
CONTROL BYTE
DATA BYTE
1
2345
678
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
P
SCL CYCLE
NUMBER
S
A6
A5
A4
A3
A2
A1
A0
ACK
TX
NV
V
R3
R2
R1
R0
ACK
D7
D6
D5
D4
D3
D2
D1
D0
ACK
VREG
0
1
0
1
A2
A1
A0
0
1
0
1
D7
D6
D5
D4
D3
D2
D1
D0
NVREG
0
1
0
1
A2
A1
A0
0
1
0
1
D7
D6
D5
D4
D3
D2
D1
D0
NVREGxVREG
0
1
0
1
A2
A1
A0
0
1
0
1
XX
VREGxNVREG
0
1
0
1
A2
A1
A0
0
1
0
1
0
1
XX
Table 2. Command Byte Summary
Nonvolatile Memory
The internal EEPROM consists of an 8-bit nonvolatile
register that retains the value written to it before the
device is powered down. The nonvolatile register is
programmed with the midscale value at the factory.
Power-Up
Upon power-up, the MAX5417/MAX5418/MAX5419
load the data stored in the nonvolatile memory register
into the volatile memory register, updating the wiper
position with the data stored in the nonvolatile memory
register. This initialization period takes 10s.
Standby
The MAX5417/MAX5418/MAX5419 feature a low-power
standby. When the device is not being programmed, it
goes into standby mode and power consumption is
typically 500nA.
Applications Information
The MAX5417/MAX5418/MAX5419 are intended for cir-
cuits requiring digitally controlled adjustable resis-
tance, such as LCD contrast control (where voltage
biasing adjusts the display contrast), or for programma-
ble filters with adjustable gain and/or cutoff frequency.
Positive LCD Bias Control
Figures 9 and 10 show an application where the volt-
age-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 9) or to a fixed
resistor and a variable resistor (see Figure 10).
Programmable Filter
Figure 11 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):
G
R
f
RC
C
=+
=
××
1
2
1
23
π
VOUT
30V
5V
W
H
L
MAX5417
MAX5418
MAx5419
VOUT
30V
5V
W
H
L
MAX5417
MAX5418
MAX5419
Figure 9. Positive LCD Bias Control Using a Voltage-Divider
Figure 10. Positive LCD Bias Control Using a Variable Resistor
X = Don’t care.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX5418META | 制造商:Maxim Integrated Products 功能描述:MAXIM MAX5418META, DIGITAL POTENTIOMETERS - Rail/Tube 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述:Maxim MAX5418META, 100Kohm Digital Potentiometer 256-Tap 2.7V-5.25V 8-pin TDFN |
| MAX5418META+ | 制造商:Maxim Integrated Products 功能描述:DGTL POTENTIOMETER 256POS 100KOHM SGL 8TDFN EP - Rail/Tube |
| MAX5418META+T | 功能描述:数字电位计 IC 256-Tap Nonvolatile I2C-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 |
| MAX5418META-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 |
| MAX5418NETA | 制造商:Maxim Integrated Products 功能描述:256-TAP NONVOLATILE 2-WIRE INTERF - Rail/Tube |
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