MAXIM DS1805 Technical data
General Description
The DS1805 addressable digital potentiometer contains
a single 256-position digitally controlled potentiometer.
Device control is achieved through a 2-wire serial interface. Device addressing is provided through three
address inputs that allow up to eight devices on a single 2-wire bus. The exact wiper position of the potentiometer can be written or read. The DS1805 is
available in 16-pin SO and 14-pin TSSOP packages.
The device is available in three standard resistance values: 10kΩ, 50kΩ, and 100kΩ. The DS1805 is specified
over the industrial temperature range. The DS1805
provides a low-cost alternative for designs based on
the DS1803, but require only a single potentiometer.
Applications
CCFL Inverters
PDAs and Cell Phones
Portable Electronics
Multimedia Products
Instrumentation and Industrial Controls
Features
♦ 3V or 5V Operation
♦ Low Power Consumption
♦ One Digitally Controlled, 256-Position
Potentiometer
♦ Compatible with DS1803-Based Designs
♦ 14-Pin TSSOP (173mil) and 16-Pin SO (150mil)
Available for Surface-Mount Applications
♦ Three Address Inputs
♦ Serial 2-Wire Bus
♦ Operating Temperature Range
Industrial: -40°C to +85°C
♦ Standard Resistance Values
DS1805-010: 10kΩ
DS1805-050*: 50kΩ
DS1805-100*: 100kΩ
DS1805
Addressable Digital Potentiometer
______________________________________________ Maxim Integrated Products 1
14
13
12
11
10
9
8
1
2
3
4
5
6
7
V
CC
N.C.
N.C.
N.C.A2
W1
L1
H1
TOP VIEW
N.C.
SDA
SCLGND
A0
A1
14 TSSOP (173mil)
DS1805E
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
H1
V
CC
N.C.
N.C.
N.C.
N.C.
N.C.
SDA
SCL
16 SO (150mil)
N.C.
L1
A1
W1
A2
A0
GND
DS1805Z
Pin Configurations
Ordering Information
PART
TEM P RANGE
PIN- PACKAGE
RESISTANCE
( KΩ)
DS1805E-010
10
DS1805E-050*
50
DS1805E-100*
100
DS1805Z-010
16 SO (150mil) 10
DS1805Z-050*
16 SO (150mil) 50
DS1805Z-100*
16 SO (150mil) 10 0
XX-XXXX; Rev 0; 4/02
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.
Add “/T&R” for tape-and-reel orders.
*Future product.
查询DS1805E-010供应商
-40°C to +85°C 14 TSSOP (173mil)
-40°C to +85°C 14 TSSOP (173mil)
-40°C to +85°C 14 TSSOP (173mil)
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
DS1805
Addressable Digital Potentiometer
2 _____________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
RECOMMENDED DC OPERATING CONDITIONS
(TA= -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 Any Pin Relative to Ground .................-0.5V to +6.0V
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-55°C to +125°C
Soldering Temperature............................................See IPC/JEDEC
J-STD-020A Specification
PARAMETER
CONDITIONS
UNITS
Supply Voltage V
CC
(Note 1)
2.7 5.5 V
Resistor Inputs L, H, W (Note 1)
V
CC
+
0.3
V
DC ELECTRICAL CHARACTERISTICS
(VCC= 2.7V to 5.5V, TA= -40°C to +85°C.)
PARAMETER
CONDITIONS
UNITS
Supply Current Active I
CC
(Note 2) 200 µA
Input Leakage I
IL
-1 +1 µA
Wiper Resistance R
W
Ω
Wiper Current I
W
1mA
Input Logic 1 V
IH
V
CC
+
0.3
V
Input Logic 0 V
IL
GND -
0.3
V
Input logic 1
V
CC
+
0.3
Input Logic Levels A0, A1, A2
(Note 3)
Input logic 0
GND -
0.3
V
Input Current each I/O Pin
(Note 4)
0.4V < V
I/O
< 0.9V
CC
-10
µA
Standby Current I
STBY
(Note 5) 20 40 µA
V
OL1
3mA sink current 0 0.4 V
Low-Level Output Voltage
V
OL2
6mA sink current 0 0.6 V
I/O Capacitance C
I/0
10 pF
Pulse Width of Spikes that Must
be Suppressed by the Input Filter
t
SP
Fast mode 0 50 ns
SYMBOL
SYMBOL
MIN TYP MAX
-0.3
MIN TYP MAX
400 1000
0.7V
CC
0.7V
CC
0.3V
0 . 2 5 V
CC
C C
+10
DS1805
Addressable Digital Potentiometer
_____________________________________________________________________ 3
ANALOG RESISTOR CHARACTERISTICS
(VCC= 2.7V to 5.5V, TA= -40°C to +85°C)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
End-to-End Resistor Tolerance (Note 6)
%
Absolute Linearity (Note 7)
LSB
Relative Linearity (Note 8)
LSB
-3dB Cutoff Frequency
(Note 9) Hz
Ratiometric Temperature Coefficient 8
ppm/°C
End-to-End Temperature Coefficient
ppm/°C
Capacitance
C
I
5pF
AC ELECTRICAL CHARACTERISTICS
(VCC= 2.7V to 5.5V, TA= -40°C to +85°C)
PARAMETER
CONDITIONS MIN
UNITS
Fast mode 0 400
SCL Clock Frequency (Note 10) f
SCL
Standard mode 0 100
kHz
Fast mode 1.3
Bus Free Time Between STOP
and START Condition (Note 10)
t
BUF
Standard mode 4.7
µs
Fast mode 0.6
Hold Time (Repeated) START
Condition (Notes 10, 11)
Standard mode 4.0
µs
Fast mode 1.3
Low Period of SCL Clock
(Note 10)
t
LOW
Standard mode 4.7
µs
Fast mode 0.6
High Period of SCL Clock
(Note 10)
t
HIGH
Standard mode 4.0
µs
Fast mode 0 0.9
Data Hold Time
(Notes 10, 12, 13)
Standard mode 0 0.9
µs
Fast mode 100
Data Setup Time
(Note 10)
Standard mode 250
ns
Fast mode
300
Rise Time of Both SDA and SCL
Signals (Notes 10, 14)
t
R
Standard mode
ns
Fast mode
300
Fall Time of Both SDA and SCL
Signals (Notes 10, 14)
t
F
Standard mode
300
ns
Fast mode 0.6
Setup Time for STOP Condition
(Note 10)
Standard mode 4.0
µs
Capacitive Load for Each Bus
Line (Note 14)
C
B
400 pF
f
CUTOFF
SYMBOL
t
HD:STA
-20 +20
-0.75 +0.75
-0.3 +0.3
550
TYP MAX
t
HD:DAT
t
SU:DAT
t
SU:STO
20 + 0.1C
20 + 0.1C
20 + 0.1C
20 + 0.1C
B
B
B
B
1000
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