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参数资料
| 型号： | MAX5427EUA |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 数字电位计 |
| 英文描述： | 4-Channel Digital Potentiometers(???é??é????°?-???μ?????¨) |
| 中文描述： | 100K DIGITAL POTENTIOMETER, INCREMENT/DECREMENT CONTROL INTERFACE, 32 POSITIONS, PDSO8 |
| 封装： | MICRO, SOP-8 |
| 文件页数： | 6/10页 |
| 文件大小： | 232K |
| 代理商： | MAX5427EUA |
M
The value of the counter is then stored and the wiper
position is maintained.
The wiper performs a make-before-break transition,
ensuring that there is never an open circuit during a tran-
sition from one resistor tap to another. When the wiper is
at either end (max/min) of the resistor array, additional
transitions in the direction of the endpoint do not change
the counter value (the counter does not wrap around).
One-Time Programming
The factory-set default position of the wiper on power-
up is tap 16. However, the power-up position can be
changed once using the one-time programming fea-
ture. After the wiper is moved to the desired position,
the programming sequence is initiated by setting U/
D
high, applying 11V to V
PP
, and then taking
CS
low. Five
pulses on
CS
(consisting of
CS
starting from low and
going high for t
CH
and then low for t
CL
) program the
device (Figure 4). The programming voltage should
then be taken to zero. After the device is programmed,
V
PP
can be set to zero or be allowed to float. The wiper
position is still adjustable, but always returns to this
programmed position on power-up.
If the intent is to program the device to a specific wiper
position and not to allow further adjustments, then six
programming pulses are required (as opposed to five),
as shown in Figure 4. The sixth pulse locks the wiper
position and disables the serial interface. This also
allows U/
D
and
CS
to float without any increase in sup-
ply current. Once the lockout bit is set, no further
adjustment to the potentiometer is possible, effectively
changing the potentiometer into a fixed resistor-divider
(Table 1).
One-Time Programmable, Linear-Taper
Digital Potentiometers
6
_______________________________________________________________________________________
V
DD
U/D
CS
V
W
t
UP
t
CU
t
CI
t
IL
t
IW
t
IH
t
IC
Figure 2. Increment Mode Serial Interface Timing Diagram
V
DD
U/D
CS
V
W
t
UP
t
CU
t
CI
t
IH
t
IW
t
IL
t
IC
Figure 3. Decrement Mode Serial Interface Timing Diagram
MODE
POWER-ON
RESET WIPER
POSITION
ADJUSTABLE
WIPER
Factory Default
(Unprogrammed)
Programmed
(5 Programming Pulses)
Lock-Bit Set
(6 Programming Pulses)
Tap 16
Yes
Programmed
position
Programmed
position
Yes
No
Table 1. One-Time Programming Options
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| MAX5427EUA+ | 功能描述:数字电位计 IC 32-Tap One-Time Programmable 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 |
| MAX5427EUA+T | 功能描述:数字电位计 IC 32-Tap One-Time Programmable 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 |
| MAX5427EUA-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 |
| MAX5427EVKIT | 功能描述:数字电位计 IC Evaluation Kit for the MAX5427 MAX5428 MAX5429 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 |
| MAX5428EGA | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
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