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參數(shù)資料
| 型號(hào)： | MAX5428ETA |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 數(shù)字電位計(jì) |
| 英文描述： | 4-Channel Digital Potentiometers(???é??é????°?-???μ?????¨) |
| 中文描述： | 50K DIGITAL POTENTIOMETER, INCREMENT/DECREMENT CONTROL INTERFACE, 32 POSITIONS, DSO8 |
| 封裝： | 3 X 3 MM, 0.80 MM HEIGHT, EXPOSED PAD, THIN, MO-220, QFN-8 |
| 文件頁數(shù)： | 6/10頁 |
| 文件大?。?/td> | 232K |
| 代理商： | MAX5428ETA |
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
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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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX5428ETA+ | 制造商:Maxim Integrated Products 功能描述:DGTL POTENTIOMETER 32POS 50KOHM SGL 8TDFN EP - Rail/Tube |
| MAX5428ETA+T | 功能描述:數(shù)字電位計(jì) IC 32-Tap One-Time Programmable 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(chǔ)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 |
| MAX5428ETA-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(chǔ)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 |
| MAX5428EUA | 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(chǔ)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 |
| MAX5428EUA+ | 功能描述:數(shù)字電位計(jì) IC 32-Tap One-Time Programmable 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(chǔ)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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