DS3901E+ Datasheet DS3901E+ | P1-P3

General Description

The DS3901 is a triple, 8-bit nonvolatile (NV) variable

resistor. Each of the resistors has two setting registers,

which are selectable by software or by pin configura-

tion. The selected register determines the value of the

variable resistor. Additionally, all three resistors have a

high-impedance setting. Resistor R0 has the additional

flexibility of allowing an external shunt resistor to pro-

vide increased dynamic range. Internal address set-

tings allow the DS3901 slave address to be

programmed to one of 128 possible addresses. The

DS3901 also features an optional password-protection

scheme that allows the protection of sensitive data.

Applications

Optical Transceivers

Optical Transponders

Instrumentation and Industrial Controls

RF Power Amps

Audio Power-Amp Biasing

Replacement for Mechanical Variable Resistors

and DIP Switches

Features

♦ Three 256-Position Linear Digital Resistors

♦ Full-Scale Resistances 50kΩ, 30kΩ, 20kΩ

♦ Dual NV Settings for Each Resistor

♦ Low Temperature-Coefficient Resistors

♦ I

C Serial Interface

♦ Wide Operating Voltage (2.4V to 5.5V)

♦ Two-Level Password Write Protection

♦ 232 Bytes of User EEPROM

♦ Programmable Slave Address

♦ -40°C to +95°C Operating Temperature Range

DS3901

Triple, 8-Bit NV Variable Resistor

with Dual Settings and User EEPROM

______________________________________________ Maxim Integrated Products 1

N.C.

L2BK_SEL

ADD_SEL

SDA

SCL

TOP VIEW

L0GND

N.C.

DIS

TSSOP

DS3901

Pin Configuration

Rev 0; 4/06

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.

+Denotes lead-free package.

Ordering Information

Typical Operating Circuit appears at end of data sheet.

PART

TEMP RANGE

RESISTOR

VALUES FOR

R0, R1, AND R2

PIN-

PACKAGE

DS3901E+

-40°C to +95°C 50kΩ, 30kΩ, 20kΩ

14 TSSOP

DS3901

Triple, 8-Bit NV Variable Resistor

with Dual Settings and User EEPROM

2 _____________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

RECOMMENDED OPERATING CONDITIONS

= -40°C to +95°C.)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

Voltage on V

CC,

SDA, SCL Relative to GND .........-0.5V to +6.0V

Voltage on ADD_SEL, BK_SEL, DIS Relative

to GND .................-0.5V to (V

+ 0.5V), not to exceed +6.0V

Voltage on H0, H1, H2, L2, L0 Relative to GND........-0.5V to +6.0V

Maximum Resistor Current....................................................3mA

Operating Temperature Range ...........................-40°C to +95°C

Programming Temperature Range .........................0°C to +70°C

Storage Temperature Range .............................-55°C to +125°C

Soldering Temperature ....................................Refer to IPC/JEDEC

J-STD-020 Specification

Maximum Switch Current ......................................................3mA

PARAMETER SYMBOL CONDITIONS MIN TYP

MAX

UNITS

Supply Voltage V

(Note 1) 2.4 5.5 V

Input Logic 0

(SDA, SCL, ADD_SEL)

(Note 1) -0.3

0.3 x

Input Logic 1

(SDA, SCL, ADD_SEL)

(Note 1)

0.7 x

0.3

Input Logic 0 (BK_SEL, DIS) V

(Note 1) -0.3 +0.8 V

Input Logic 1 (BK_SEL, DIS) V

(Note 1) 2.0

0.3

Voltage on Resistor Inputs

H0, H1,

L0, H2, L2

-0.3 +5.5 V

Switch Current

(L0_SW, Hi-Z0, Hi-Z1, Hi-Z2)

(Note 2) 3 mA

ELECTRICAL CHARACTERISTICS

= +2.4V to +5.5V, T

= -40°C to +95°C, unless otherwise noted.)

PARAMETER SYMBOL CONDITIONS MIN TYP

MAX

UNITS

Standby Current I

STBY

(Note 3) 250 µA

Input Leakage I

-1 +1 µA

OL1

3mA sink current 0 0.4

Low-Level Output Voltage (SDA)

OL2

6mA sink current 0 0.6

Pulldown Resistance (BK_SEL) R

20 30 45 kΩ

Pullup Resistance (DIS) R

DIS

20 30 45 kΩ

BK_SEL Pulse Width 20 µs

DS3901

Triple, 8-Bit NV Variable Resistor

with Dual Settings and User EEPROM

_____________________________________________________________________ 3

ANALOG RESISTOR CHARACTERISTICS

= +2.4V to +5.5V, T

= -40°C to +95°C, unless otherwise noted.)

PARAMETER SYMBOL CONDITIONS MIN TYP

MAX

UNITS

Resistor Tolerance T

= +25°C -20 +20 %

R0, R2 242 500

Position 00h Resistance

R1 149 250

Ω

R0 50

R1 30

Position FFh Resistance

R2 20

kΩ

Switch Resistance R

L0_SW

At 3mA 150 Ω

Absolute Linearity (Note 4)

-0.75 +0.75

LSB

Relative Linearity (Note 5)

-0.75 +0.75

LSB

Temperature Coefficient Position FFh (Notes 2, 6) 50

ppm/°C

Hi-Z Resistor Leakage I

RHIZ

H0, H1, H2, L0, or L2 = V

-1 +1 µA

C CHARACTERISTICS

= +2.4V to +5.5V, T

= -40°C to +95°C, unless otherwise noted. Timing referenced to V

IL(MAX)

and V

IH(MIN)

PARAMETER SYMBOL CONDITIONS MIN TYP

MAX

UNITS

SCL Clock Frequency f

SCL

(Note 7) 0 400

kHz

Bus Free Time between STOP and

START Condition

BUF

1.3 µs

Hold Time (Repeated)

START Condition

HD:STA

0.6 µs

Low Period of SCL Clock t

LOW

1.3 µs

High Period of SCL Clock t

HIGH

0.6 µs

Data Hold Time t

HD:DAT

0 0.9 µs

Data Setup Time t

SU:DAT

100 ns

Start Setup time t

SU:STA

0.6 µs

Rise Time of Both SDA and SCL

Signals

(Note 8)

20 +

0.1C

300 ns

Fall Time of Both SDA and SCL

Signals

(Note 8)

20 +

0.1C

300 ns

Setup Time for STOP Condition t

SU:STO

0.6 µs

Capacitive Load for Each Bus Line

(Note 8) 400 pF

EEPROM Write Time t

(Note 9) 10 ms

Input Capacitance C

5pF

Startup Time t

0.3 2 ms

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P18 P19-P20

DS3901E+

Mfr. #:

Buy DS3901E+

Manufacturer:

Maxim Integrated

Description:

Digital Potentiometer ICs Tri 8Bit NV Variable w/Dual Stgs & EEPROM

Lifecycle:

New from this manufacturer.

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DS3901E+