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參數(shù)資料
| 型號： | DS2890X-000 |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 26/27頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC POT DIGITAL 1-WIRE 100K CSP |
| 標(biāo)準(zhǔn)包裝： | 10,000 |
| 接片： | 256 |
| 電阻（歐姆）： | 100k |
| 電路數(shù)： | 1 |
| 溫度系數(shù)： | 標(biāo)準(zhǔn)值 800 ppm/°C |
| 存儲器類型： | 易失 |
| 接口： | 1 線 串行 |
| 電源電壓： | 2.8 V ~ 6 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 6-XBGA，F(xiàn)CBGA |
| 供應(yīng)商設(shè)備封裝： | 6-覆晶（2.82x2.54） |
| 包裝： | 帶卷 (TR) |
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DS2890
8 of 27
WIPER RESISTANCECONSIDERATIONS
A simplified diagram of the DS2890 resistor array for the potentiometer configuration is shown in
FIGURE 7. In this figure the
rDS resistance of the wiper transistors in Figure 1 are modeled as wiper
resistance RWIPER. The value of RWIPER varies with device configuration, operational state, and wiper
terminal voltage. Wiper resistance is significantly reduced when an external VDD supply is used and the
device charge pump is enabled. A wiper resistance graph with the charge pump enabled is shown in
FIGURE 8.
FIGURE 7. Potentiometer Resistor Model
RH
R
WIPER
RL
WIPER
FIGURE 8. Typical Wiper Resistance vs Wiper Voltage at 25
oC,
Charge Pump ON
100
1000
0.1
5.5
11
Voltage Across Wiper (V)
Wiper
Resistance
(ohms)
When packaged in a 3-pin TO-92 or configured as a variable resistor, the DS2890 takes on a
configuration as shown in FIGURE 9Error! Reference source not found., aError! Reference source
not found. simplified model is shown in Figure 10. As shown, the RL and Wiper terminals and are
connected to GND and the resistance between the RH terminal and GND is varied. As described
previously, the DS2890 charge pump must be turned off (default state) for operation with the TO-92
package or when VDD is not applied. Wiper resistance for a configuration with the charge pump
disabled is shown in FIGURE 11.
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| DS28CM00 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:IC/SMBus Silicon Serial Number |
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