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DS3904U-020+

P1-P3P4-P6P7-P9P10-P11
General Description
The DS3904/DS3905 contain three nonvolatile (NV) low
temperature coefficient, variable digital resistors. Each
resistor has 128 user-selectable positions. Additionally,
the DS3904/DS3905 have a high-impedance setting that
allows each resistor to function as a digital switch. The
DS3904/DS3905 can operate over a 2.7V to 5.5V supply
voltage range, and communication with the device is
achieved through a 2-wire serial interface. Address pins
allow multiple DS3904/DS3905s to operate on the same
two-wire bus. The DS3904 has one address pin, allow-
ing two DS3904s to share the bus, while the DS3905
has three address pins, allowing up to eight DS3905s to
share a common bus. The low-cost and small size of the
DS3904/DS3905 make them ideal replacements for con-
ventional mechanical trimming resistors.
Applications
Power-Supply Calibration
Cell Phones and PDAs
Fibre Optic Transceiver Modules
Portable Electronics
Small and Low-Cost Replacement for
Conventional Mechanical Trimming Resistors/
Dip Switches
Test Equipment
Features
♦ Three 20k
ΩΩ
, or Two 20k
ΩΩ
and One 10k
ΩΩ
, 128-
Position Linear Digital Resistors
♦ Resistor Settings are Stored in NV Memory
♦ Each Resistor has a High-Impedance Setting for
Switch Operation to Control Digital Logic
♦ Low Temperature Coefficient
♦ 2-Wire Serial Interface
♦ 2.7V to 5.5V Operating Range
♦ -40°C to +85°C Industrial Temperature
♦ Packaging: 8-Pin µSOP for DS3904, 10-pin µSOP
for DS3905
DS3904/DS3905
Triple 128-Position Nonvolatile Digital
Variable Resistor/Switch
_____________________________________________
Maxim Integrated Products
1
Pin Configurations
0.1μF
4.7kΩ
2-WIRE
MASTER
V
CC
V
CC
H0
H1
H2
RHIZ
R
10
V
CC
SCL
SDA
(DS3905 ONLY)
A1
A2
RESISTOR 0
ADDR F8h
RESISTOR 1
ADDR F9h
RESISTOR 2
ADDR FAh
A0
GND
4.7kΩ
VARIABLE RESISTANCE
FOR ADJUSTABLE
CURRENT SOURCE
INTERFACE EXAMPLES
2-WIRE
ADDRESSABLE
SWITCH (USING 00h
AND RHIZ SETTINGS)
GAIN
CONTROL
V
IN
DS3904/DS3905
V
CC
RHIZ
RHIZ
R
11
DIGITAL
LOGIC
R
12
Typical Operating Circuit
Ordering Information
Rev 3; 3/07
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.
PART TEMP RANGE
PIN-
PACKAGE
(R0/R1/R2)
RESISTANCE (k)
DS3904U-010 -40°C to +85°C 8 μSOP 20/10/20 + High-Z
DS3904U-020 -40°C to +85°C 8 μSOP 20/20/20 + High-Z
DS3905U-020 -40°C to +85°C 10 μSOP 20/20/20 + High-Z
8
6
5
1
3
4
SDA
TOP VEIW
A0
72
SCL
H0
H1
H2
μSOP
V
CC
GND
DS3904
101
A1
A2
92
SDA
A0
μSOP
83H0SDL
7
4
H1V
CC
6
5
H2GND
DS3905
DS3904/DS3905
Triple 128-Position Nonvolatile
Variable Digital Resistor/Switch
2 ______________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
RECOMMENDED DC OPERATING CONDITIONS
(T
A
= -40°C to +85°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
Pin Relative to Ground.................-0.5V to +6.0V
Voltage on SDA, SCL, A0, A1, A2
Relative to Ground*...................................-0.5V to V
CC
+ 0.5V
Voltage on H0, H1, and
H2 Relative to Ground .......................................-0.5V to +6.0V
Current Through H0, H1, and H2..........................................3mA
Operating Temperature Range ...........................-40°C to +85°C
Programming Temperature Range .........................0°C to +70°C
Storage Temperature Range .............................-55°C to +125°C
Soldering Temperature...................See J-STD-020 Specification
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage V
CC
(Note 1) 2.7 5.5 V
Input Logic 1 V
IH
0.7 x
V
CC
V
CC
+
0.3
V
Input Logic 0 V
IL
-0.3
0.3 x
V
CC
V
Resistor Current I
R
3mA
Resistor Terminals H0, H1, H2 V
CC
= +2.7V to +5.5V -0.3 +5.5 V
DC ELECTRICAL CHARACTERISTICS
(V
CC
= +2.7V to +5.5V, T
A
= -40°C to +85°C, unless otherwise noted.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Input Leakage I
L
(Note 2) -1 +1 µA
V
CC
= 3V (Note 3) 95 200
Standby Supply Current I
STBY
V
CC
= 5V (Note 3) 145 200
µA
V
OL1
3mA sink current 0 0.4
Low-Level Output Voltage (SDA)
V
OL2
6mA sink current 0 0.6
V
ANALOG RESISTOR CHARACTERISTICS
(V
CC
= +2.7V to +5.5V, T
A
= -40°C to +85°C, unless otherwise noted.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
20k resistor -1 +1
Absolute Linearity (Note 4) INL
10k resistor -1 +1
LSB
20k resistor -0.5 +0.5
Relative Linearity (Note 5) DNL
10k resistor -0.5 +0.5
LSB
Position 7Fh (20k resistor) -200 +123 +400
Temperature Coefficient (Note 6)
Position 7Fh (10k resistor) -150 +173 +450
ppm/°C
*This voltage must not exceed 6.0V.
DS3904/DS3905
Triple 128-Position Nonvolatile Digital
Variable Resistor/Switch
_____________________________________________________________________ 3
AC ELECTRICAL CHARACTERISTICS
(V
CC
= +2.7V to +5.5V, T
A
= -40°C to +85°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Fast mode 0 400
SCL Clock Frequency
(Note 7)
f
SCL
Standard mode 0 100
kHz
Fast mode 1.3
Bus Free Time between STOP
and START Conditions (Note 7)
t
BUF
Standard mode 4.7
µs
Fast mode 0.6
Hold Time (Repeated) START
Condition (Notes 7, 8)
t
HD:STA
Standard mode 4.0
µs
Fast mode 1.3
Low Period of SCL Clock
(Note 7)
t
LOW
Standard mode 4.7
µs
Fast mode 0.6
High Period of SCL Clock
(Note 7)
t
HIGH
Standard mode 4.0
µs
Fast mode 0 0.9
Data Hold Time
(Notes 7, 9)
t
HD:DAT
Standard mode 0 0.9
µs
Fast mode 100
Data Setup Time
(Note 7)
t
SU:DAT
Standard mode 250
ns
Fast mode 0.6
Start Setup Time t
SU:STA
Standard mode 4.7
µs
Fast mode 20 + 0.1C
B
300
Rise Time of Both SDA and SCL
Signals (Note 10)
t
R
Standard mode 20 + 0.1C
B
1000
ns
Fast mode 20 + 0.1C
B
300
Fall Time of Both SDA and SCL
Signals (Note 10)
t
F
Standard mode 20 + 0.1C
B
300
ns
Fast mode 0.6
Setup Time for STOP Condition t
SU:STO
Standard mode 4.0
µs
Capacitive Load for Each Bus
Line
C
B
(Note 10) 400 pF
EEPROM Write Time t
W
(Note 11) 10 20 ms
Startup Time t
ST
2ms
ANALOG RESISTOR CHARACTERISTICS (continued)
(V
CC
= +2.7V to +5.5V, T
A
= -40°C to +85°C, unless otherwise noted.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
T
A
= +25°C (20k resistor) 14.5 20 25.5
Position 7Fh Resistance R
MAX
T
A
= +25°C (10k resistor) 8 10 12
k
Position 00h Resistance R
MIN
T
A
= +25°C 200 500
High Impedance R
HIZ
5.5 M
P1-P3P4-P6P7-P9P10-P11

DS3904U-020+

Mfr. #:
Buy DS3904U-020+
Manufacturer:
Maxim Integrated
Description:
Digital Potentiometer ICs Triple 128-Position Nonvolatile
Lifecycle:
New from this manufacturer.
Delivery:
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