DS3906U+ Maxim Integrated Products, DS3906U+ Datasheet

IC RESIST VAR TRPL 10USOP

DS3906U+

Manufacturer Part Number
DS3906U+
Description
IC RESIST VAR TRPL 10USOP
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of DS3906U+

Taps
64
Resistance (ohms)
1.45K, 2.54K, 2.54K
Number Of Circuits
3
Temperature Coefficient
60 ppm/°C Typical
Memory Type
Non-Volatile
Interface
I²C, 2-Wire Serial
Voltage - Supply
2.7 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
10-MSOP, Micro10™, 10-uMAX, 10-uSOP
Resistance In Ohms
1.45K, 2.54K, 2.54K
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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 I
serial interface. Three address pins allow up to eight
DS3906s to be placed on the same I
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.
Rev 1; 2/06
Typical Operating Circuit appears at end of data sheet.
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.
Low Ohm, Fine Resolution Driver Control for LED
Display Panels
Low Ohm, Fine Resolution Instrumentation Control
200
180
160
140
120
100
RESISTOR 0 AND 1 RESISTANCE vs. POSITION
80
60
40
20
0
(WITH AND WITHOUT EXTERNAL RESISTOR)
0
R
0, 1
|| (R
EXT
16
RESISTOR POSITION (dec)
R
= 105Ω)
0, 1
|| (R
EXT
32
General Description
R
0, 1
R
= 50Ω)
0, 1
|| (R
WITHOUT R
EXT
48
= 150Ω)
EXT
Applications
2
Triple NV Low Step Size Variable
64
C bus.
______________________________________________ Maxim Integrated Products
3000
2500
2000
1500
100
500
20
0
2
C-compatible
DS3906
R0
R1
R2
♦ Three Programmable Resistors for Low Step-Size
♦ Resistor Settings are NV
♦ 16-Byte NV User Memory (EEPROM)
♦ I
♦ Up to 8 Devices Can be Multidropped on the
♦ Low Power Consumption
♦ Wide Operating Voltage (2.7V to 5.5V)
♦ Operating Temperature Range: -40°C to +85°C
+Denotes lead-free package.
T&R denotes tape-and-reel package.
DS3906U
DS3906U+
DS3906U+T&R
DS3906U/T&R
Applications (Ohm and Subohm)
Same I
Resistor Plus Memory
2
C-Compatible Serial Interface
TOP VEIW
R
R
R
PART
EXT0
EXT1
EXT2
2
C Bus
350
300
250
200
150
100
GND
SDA
SCL
50
V
0
A1
CC
(WITH AND WITHOUT EXTERNAL RESISTOR)
0
RESISTOR 2 RESISTANCE vs. POSITION
R
1
2
3
4
5
R
2
2
|| (R
|| (R
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
Ordering Information
EXT
EXT
16
RESISTOR POSITION (dec)
= 310Ω)
DS3906
μSOP
= 250Ω)
Pin Configuration
R
32
R
2
2
|| (R
Resistor Plots
WITHOUT R
EXT
10
9
8
7
6
= 400Ω)
A2
A0
H0
H1
H2
48
EXT
PIN-PACKAGE
10 µSOP
10 µSOP
10 µSOP
10 µSOP
Features
64
1600
1400
1200
1000
800
600
400
1

Related parts for DS3906U+

DS3906U+ Summary of contents

Page 1

... Devices Can be Multidropped on the Same I ♦ Low Power Consumption ♦ Wide Operating Voltage (2.7V to 5.5V) ♦ Operating Temperature Range: -40°C to +85°C 2 C-compatible 2 C bus. DS3906U DS3906U+ DS3906U+T&R DS3906U/T&R Applications +Denotes lead-free package. T&R denotes tape-and-reel package. TOP VEIW 3000 R0 R 2500 2000 ...

Page 2

Triple NV Low Step Size Variable Resistor Plus Memory ABSOLUTE MAXIMUM RATINGS Voltage SDA, SCL, and H0-H2 Pins CC Relative to Ground.............................................-0.5V to +6.0V Voltage on A0, A1, and A2 Relative to Ground .....-0. ...

Page 3

AC ELECTRICAL CHARACTERISTICS (See Figure +2.7V to 5.5V -40°C to +85°C, unless otherwise noted. Timing referenced PARAMETER SYMBOL SCL Clock Frequency Bus Free Time Between Stop and Start Conditions Hold Time ...

Page 4

Triple NV Low Step Size Variable Resistor Plus Memory (V = +5.0V +25°C, unless otherwise noted SUPPLY CURRENT vs. SUPPLY VOLTAGE 200 180 160 140 120 100 2.70 3.20 3.70 4.20 ...

Page 5

T = +25°C, unless otherwise noted RESISTOR R TEMPERATURE COEFFICIENT 0,1 (+25°C TO +85°C) vs. RESISTOR SETTING 400 350 +25°C TO +85°C 300 250 200 150 100 ...

Page 6

Triple NV Low Step Size Variable Resistor Plus Memory (V = +5.0V +25°C, unless otherwise noted RESISTANCE AT POSITION 1Fh 2 vs. POWER-UP VOLTAGE 4000 >5.5MΩ RESISTOR R 2 3500 3000 2500 EEPROM RECALL 2000 ...

Page 7

PIN NAME Address Input. Inputs A0, A1, and A2 determine the SDA I C Serial Data Open-Drain Input/Output 2 3 SCL I C Serial Clock Input 4 V Power Supply Voltage CC ...

Page 8

Triple NV Low Step Size Variable Resistor Plus Memory makes the corresponding resistor go High-Z. Plots for both resistor sizes are shown on the front page of this data sheet. It can be seen that, when an external resis- tor ...

Page 9

Table 3. DS3906 Resistor Settings (without external resistor) NOMINAL RESISTOR VALUES POSITION WITHOUT EXT RESISTOR (25°C) Dec Hex Resistors 175 178 182 186 190 195.2 6 ...

Page 10

Triple NV Low Step Size Variable Resistor Plus Memory External Resistor Selection/Considerations Using an external resistor in parallel with any of the DS3906’s resistors makes the effective resistance linear with small increments from position to position. Typical values for the ...

Page 11

Repeated Start Condition: The master can use a repeated start condition at the end of one data transfer to indicate that it will immediately initiate a new data trans- fer following the current one. Repeated starts are com- monly used ...

Page 12

Triple NV Low Step Size Variable Resistor Plus Memory Acknowledge Polling: Any time an EEPROM page is written, the DS3906 requires the EEPROM write time (t ) after the stop condition to write the contents of the W page to ...

Page 13

Reading Multiple Bytes from a Slave: The read oper- ation can be used to read multiple bytes with a single transfer. When reading bytes from the slave, the master simply ACKs the data byte if it desires to read another ...

Page 14

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 14 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2006 Maxim Integrated Products is a registered trademark of Dallas Semiconductor Corporation. ...

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