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PDF MAX5481 Data sheet ( Hoja de datos )
| Número de pieza | MAX5481 | |
| Descripción | 10-Bit / Nonvolatile - Linear-Taper Digital Potentiometers | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
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19-3708; Rev 3; 4/07
www.DataSheet4U.com
10-Bit, Nonvolatile, Linear-Taper Digital
Potentiometers
General Description
The MAX5481–MAX5484 10-bit (1024-tap) nonvolatile,
linear-taper, programmable voltage-dividers and vari-
able resistors perform the function of a mechanical
potentiometer, but replace the mechanics with a pin-
configurable 3-wire serial SPI™-compatible interface or
up/down digital interface. The MAX5481/MAX5482 are
3-terminal voltage-dividers and the MAX5483/MAX5484
are 2-terminal variable resistors.
The MAX5481–MAX5484 feature an internal, non-
volatile, electrically erasable programmable read-only
memory (EEPROM) that stores the wiper position for ini-
tialization during power-up. The 3-wire SPI-compatible
serial interface allows communication at data rates up
to 7MHz. A pin-selectable up/down digital interface is
also available.
The MAX5481–MAX5484 are ideal for applications
requiring digitally controlled potentiometers. Two end-to-
end resistance values are available (10kΩ and 50kΩ) in a
voltage-divider or a variable-resistor configuration (see
the Selector Guide). The nominal resistor temperature
coefficient is 35ppm/°C end-to-end, and only 5ppm/°C
ratiometric, making these devices ideal for applications
requiring low-temperature-coefficient voltage-dividers,
such as low-drift, programmable gain-amplifiers.
The MAX5481–MAX5484 operate with either a +2.7V to
+5.25V single power supply or ±2.5V dual power sup-
plies. These devices consume 400µA (max) of supply
current when writing data to the nonvolatile memory
and 1.0µA (max) of standby supply current. The
MAX5481–MAX5484 are available in a space-saving
(3mm x 3mm), 16-pin TQFN, or a 14-pin TSSOP pack-
age and are specified over the extended (-40°C to
+85°C) temperature range.
Applications
Gain and Offset
Adjustment
Low-Drift Programmable
Gain Amplifiers
LCD Contrast Adjustment Mechanical Potentiometer
Pressure Sensors
Replacement
Ordering Information
PART
PIN-PACKAGE
PKG CODE
TOP
MARK
MAX5481ETE
MAX5481EUD
16 TQFN-EP*
14 TSSOP
T1633F-3
U14-1
ACP
—
Note: All devices are specified over the -40°C to +85°C operating
temperature range.
*EP = Exposed pad.
Ordering Information continued at end of data sheet.
Features
♦ 1024 Tap Positions
♦ Power-On Recall of Wiper Position from
Nonvolatile Memory
♦ 16-Pin (3mm x 3mm x 0.8mm) TQFN or 14-Pin
TSSOP Package
♦ 35ppm/°C End-to-End Resistance Temperature
Coefficient
♦ 5ppm/°C Ratiometric Temperature Coefficient
♦ 10kΩ and 50kΩ End-to-End Resistor Values
♦ Pin-Selectable SPI-Compatible Serial Interface or
Up/Down Digital Interface
♦ 1µA (max) Standby Current
♦ Single +2.7V to +5.25V Supply Operation
♦ Dual ±2.5V Supply Operation
Pin Configurations
TOP VIEW
GND 13
VDD 14
N.C. 15
VSS 16
12 11 10 9
INTERFACE
MAX5481*
MAX5482*
12 3 4
8 VSS
7 N.C.
6 N.C.
5 N.C.
TQFN
*SEE FUNCTIONAL DIAGRAM
GND 13
VDD 14
N.C. 15
VSS 16
12 11 10 9
INTERFACE
MAX5483
MAX5484
12 3 4
8 VSS
7 N.C.
6 N.C.
5 N.C.
TQFN
Pin Configurations continued at end of data sheet.
Selector Guide appears at end of data sheet.
SPI is a trademark of Motorola, Inc.
________________________________________________________________ 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.
1 page  
www.DataSheet4U.com
10-Bit, Nonvolatile, Linear-Taper Digital
Potentiometers
(VDD = 5.0V, VSS = 0, TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics
1.0
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0
0
DNL vs. CODE (MAX5483)
VDD = 2.7V
128 256 384 512 640 768 896 1024
CODE
1.0
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0
0
DNL vs. CODE (MAX5483)
VDD = 5V
128 256 384 512 640 768 896 1024
CODE
INL vs. CODE (MAX5483)
2.0
1.5 VDD = 2.7V
1.0
0.5
0
-0.5
-1.0
-1.5
-2.0
0
128 256 384 512 640 768 896 1024
CODE
INL vs. CODE (MAX5483)
2.0
1.5 VDD = 3V
1.0
0.5
0
-0.5
-1.0
-1.5
-2.0
0
128 256 384 512 640 768 896 1024
CODE
INL vs. CODE (MAX5483)
2.0
1.5 VDD = 5V
1.0
0.5
0
-0.5
-1.0
-1.5
-2.0
0
128 256 384 512 640 768 896 1024
CODE
1.0
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0
0
DNL vs. CODE (MAX5481)
VDD = 2.7V
128 256 384 512 640 768 896 1024
CODE
1.0
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0
0
DNL vs. CODE (MAX5481)
VDD = 5V
128 256 384 512 640 768 896 1024
CODE
1.0
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0
0
INL vs. CODE (MAX5481)
VDD = 2.7V
128 256 384 512 640 768 896 1024
CODE
1.0
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0
0
INL vs. CODE (MAX5481)
VDD = 5V
128 256 384 512 640 768 896 1024
CODE
_______________________________________________________________________________________ 5
5 Page 
www.DataSheet4U.com
10-Bit, Nonvolatile, Linear-Taper Digital
Potentiometers
Functional Diagrams
VDD
GND
10-BIT
NV
MEMORY
10-BIT
LATCH
10 10
DECODER
VSS
H
W
CS
SCLK(INC)
DIN(U/D)
SPI
INTERFACE
POR
MUX
UP/DOWN
INTERFACE
MAX5481
MAX5482
NOTE: THE MAX5481/MAX5482 ARE NOT INTENDED FOR CURRENT TO FLOW THROUGH THE WIPER
(SEE THE MAX5481/MAX5482 PROGRAMMABLE VOLTAGE-DIVIDER SECTION).
L
SPI/UD
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 21 Páginas | |
| PDF Descargar | [ Datasheet MAX5481.PDF ] | |
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