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參數(shù)資料
| 型號(hào)： | DS4301U-200+T&R |
| 廠商： | Maxim Integrated Products |
| 文件頁(yè)數(shù)： | 6/7頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC POT DIG NV 200K 32POS 8-USOP |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 3,000 |
| 接片： | 32 |
| 電阻（歐姆）： | 200k |
| 電路數(shù)： | 1 |
| 溫度系數(shù)： | 標(biāo)準(zhǔn)值 ±250 ppm/°C |
| 存儲(chǔ)器類型： | 非易失 |
| 接口： | 3 線（芯片選擇，遞增，增/減） |
| 電源電壓： | 2.4 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-TSSOP，8-MSOP（0.118"，3.00mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 8-uMAX |
| 包裝： | 帶卷 (TR) |
DS4301
Detailed Description
The DS4301 is a single nonvolatile digital potentiome-
ter. This 32-position linear potentiometer has an end-to-
end resistance of 200k
, and operates over a wide
2.4V to 5.5V supply voltage range. The wiper position is
controlled by the three interface pins (U/D, CS, and
INC), and the wiper setting can be stored in EEPROM
on command.
Power-Up
On power-up, once a stable supply voltage of VCC MIN
has been reached, the stored wiper setting is loaded
from the EEPROM within tWLT. Also on power-up, the
DS4301 wiper control pins become active approximate-
ly tPU after a stable supply voltage of VCC MIN has
been reached.
Wiper Control
Adjusting the wiper of the DS4301 involves using the
three control pins (U/D, CS, and INC). See the Timing
Diagram in Figure 2. To enable wiper adjustment, a
high-to-low transition on the CS pin is required. Hold
CS low for the duration of the communication. Doing
this enables the INC pin to change the wiper position.
Set the U/D pin high to increment or low to decrement
the wiper position. The state of the U/D pin should be
set more than tDI before the INC signal is transitioned
from high to low. After the CS pin is active low, a high-
to-low transition on the INC pin moves the wiper in the
direction dictated by the U/D pin. Continue to pulse
INC (high to low) until the desired wiper position is
reached. On the last edge, hold the INC line low. With
the desired wiper position set, there are two ways to
proceed. One method terminates communication with-
out allowing the value of the current wiper position to
be written to the EEPROM. This is done by transitioning
the CS signal to the high state before bringing the INC
signal high. As long as the state of the CS pin is high
before the state of the INC pin goes high, the current
wiper setting is not written to EEPROM. Because the
current wiper setting was not stored to the NV memory,
the previously stored wiper setting, not the current
wiper setting, is loaded from memory if power is cycled
to the device
The other method is used to store a new wiper setting
in the EEPROM. This is done by bringing the state of
the INC pin high for a time of tIC before bringing the
state of the CS pin high. Once the states of both CS
and INC pins are high, the current wiper setting is
stored in EEPROM after a time of tWST. If power is
Nonvolatile, 32-Position Digital Potentiometer
6
_____________________________________________________________________
VCC
GND
CS
INC
U/D
CONTROL
LOGIC UNIT
NONVOLATILE
MEMORY
5-BIT
WIPER
SETTING
POS 31
POS 0
H
L
W
VCC
Figure 1. Block Diagram
CS
INC
U/D
tCI
tIL
tIH
tF
tIC
tWST
tCPH
tDI
tR
WIPER STORAGE
CONDITION
WIPER NON-STORAGE
CONDITION
WIPER POSITION
POSITION X
POSITION X + 1
POSITION X
tIW
tIK
POSITION X - 1
VIL
VIL
VIH
tCLP
Figure 2. Timing Diagram
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| DS4301Z-200 | 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 |
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| DS4302U-019 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:2-Wire, 5-Bit DAC with Three Digital Outputs |
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