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DS3906

更新时间： 2024-11-06 21:55:39
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美信 - MAXIM 存储
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14页 260K
描述
Triple NV Low Step Size Variable Resistor Plus Memory

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DS3906 数据手册

 浏览型号DS3906的Datasheet PDF文件第2页浏览型号DS3906的Datasheet PDF文件第3页浏览型号DS3906的Datasheet PDF文件第4页浏览型号DS3906的Datasheet PDF文件第5页浏览型号DS3906的Datasheet PDF文件第6页浏览型号DS3906的Datasheet PDF文件第7页 
Rev 0; 4/05  
Triple NV Low Step Size Variable  
Resistor Plus Memory  
General Description  
Features  
♦ Three Programmable Resistors for Low Step-Size  
The DS3906 is intended for low resistance, small step-  
size applications. It contains three nonvolatile (NV), low-  
temperature coefficient, variable digital resistors that  
are capable of ohm and subohm increments when  
used in parallel with a fixed external resistor. All three of  
the DS3906’s resistors have 64 positions (plus a high-Z  
state) with a pseudo-log response cleverly chosen to  
have a linear equivalent resistance when paired with an  
external resistor (see graphs below). The DS3906 also  
contains 16 bytes of user EEPROM that, in addition to  
the resistors, are controlled through an I2C™-compati-  
ble serial interface. Three address pins allow up to  
eight DS3906s to be placed on the same I2C bus.  
Applications (Ohm and Subohm)  
♦ Resistor Settings are NV  
♦ 16-Byte NV User Memory (EEPROM)  
2
♦ I C-Compatible Serial Interface  
♦ Up to 8 Devices Can be Multidropped on the  
2
Same I C Bus  
♦ Low Power Consumption  
♦ Wide Operating Voltage (2.7V to 5.5V)  
♦ Operating Temperature Range: -40°C to +85°C  
Ordering Information  
The DS3906 can also be factory cutomized to provide a  
variety of transfer functions depending on user  
requirements. Contact mixedsignal.apps@dalsemi.com  
for additional information.  
PART  
DS3906U  
DS3906U+  
TEMP RANGE  
-40°C to +85°C  
-40°C to +85°C  
PACKAGE  
10-Pin µSOP  
10-Pin µSOP  
+Denotes lead-free package.  
Add “/T&R” for Tape-and-Reel orders  
Applications  
Low Ohm, Fine Resolution Driver Control for LED  
Display Panels  
Pin Configuration  
TOP VEIW  
Low Ohm, Fine Resolution Instrumentation Control  
A1  
1
2
3
4
5
10 A2  
SDA  
9
8
7
6
A0  
H0  
H1  
H2  
SCL  
DS3906  
V
CC  
Typical Operating Circuit appears at end of data sheet.  
GND  
10-PIN µSOP  
Resistor Plots  
RESISTOR 0 AND 1 RESISTANCE vs. POSITION  
(WITH AND WITHOUT EXTERNAL RESISTOR)  
RESISTOR 2 RESISTANCE vs. POSITION  
(WITH AND WITHOUT EXTERNAL RESISTOR)  
200  
180  
160  
140  
120  
100  
80  
3000  
2500  
2000  
1500  
100  
500  
20  
350  
1600  
R0  
R1  
R2  
R
R
R
EXT0  
EXT1  
EXT2  
R || (R = 400Ω)  
2
EXT  
300  
250  
200  
150  
100  
50  
1400  
1200  
1000  
800  
R || (R = 310Ω)  
2
EXT  
R
|| (R = 150Ω)  
EXT  
0, 1  
R
0, 1  
|| (R = 105Ω)  
EXT  
DS3906  
R || (R = 250Ω)  
2
EXT  
R
0, 1  
|| (R = 50Ω)  
EXT  
60  
R WITHOUT R  
2
EXT  
40  
600  
20  
R
WITHOUT R  
48  
0, 1  
EXT  
0
0
0
400  
0
16  
32  
64  
0
16  
32  
48  
64  
RESISTOR POSITION (dec)  
RESISTOR POSITION (dec)  
2
2
I C is a trademark of Philips Corp. Purchase of I C components of Maxim Integrated Products, Inc., or one of its sublicensed  
2
2
Associated Companies, conveys a license under the Philips I C Patent Rights to use these components in an I C system, provided  
that the system conforms to the I C Standard Specification as defined by Philips Corp.  
2
______________________________________________ Maxim Integrated Products  
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at  
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.  
1234567...14

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