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MAX5494 Datasheet

  • MAX5494

  • 10位、双路、非易失、线性变化数字电位器

  • 1099.36KB

  • 20页

  • MAXIM   MAXIM 

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19-3562; Rev 2; 1/06
KIT
ATION
EVALU
BLE
AVAILA
10-Bit, Dual, Nonvolatile, Linear-Taper
Digital Potentiometers
General Description
Features
鈾?/div>
Wiper Position Stored in Nonvolatile Memory and
Recalled Upon Power-Up
鈾?/div>
16-Pin, 5mm x 5mm x 0.8mm TQFN Package
鈾?/div>
35ppm/掳C End-to-End Resistance Temperature
Coefficient
鈾?/div>
5ppm/掳C Ratiometric Temperature Coefficient
鈾?/div>
10k鈩?and 50k鈩?End-to-End Resistor Values
鈾?/div>
3-Wire SPI-Compatible Serial Interface
鈾?/div>
Reliability (T
A
= +85掳C)
50,000 Wiper Store Cycles
50 Years Wiper Data Retention
鈾?/div>
1.5碌A (max) Standby Current
鈾?/div>
Single +2.7V to +5.25V Supply Operation
鈾?/div>
Dual 卤2.5V Supply Operation
MAX5494鈥揗AX5499
The MAX5494鈥揗AX5499 10-bit (1024-tap), dual, non-
volatile, linear-taper, programmable voltage-dividers
and variable resistors perform the function of a
mechanical potentiometer, but replace the mechanics
with a 3-wire SPI鈩?compatible serial interface. The
MAX5494/MAX5495 are dual, 3-terminal, programma-
ble voltage-dividers; the MAX5496/MAX5497 are dual,
2-terminal variable resistors; and the MAX5498/
MAX5499 include one 2-terminal variable resistor and
one 3-terminal programmable voltage-divider.
The MAX5494鈥揗AX5499 feature an internal, nonvolatile,
electrically erasable programmable read-only memory
(EEPROM) that stores the wiper position for initialization
during power-up. The 3-wire SPI-compatible serial inter-
face allows communication at data rates up to 7MHz.
The MAX5494鈥揗AX5499 are ideal for applications requir-
ing digitally controlled potentiometers. End-to-end resis-
tance values of 10k鈩?and 50k鈩?are available with a
35ppm/掳C end-to-end temperature coefficient. The ratio-
metric temperature coefficient is 5ppm/掳C for each chan-
nel, making these devices ideal for applications requiring
low-temperature-coefficient programmable voltage-
dividers such as low-drift, programmable-gain amplifiers.
The MAX5494鈥揗AX5499 operate with either a single
power supply (+2.7V to +5.25V) or dual power supplies
(卤2.5V). The devices consume 400碌A (max) of supply
current when writing data to the nonvolatile memory
and 1.5碌A (max) of standby supply current. The
devices are available in space-saving (5mm x 5mm x
0.8mm), 16-pin TQFN package and are specified over
the extended (-40掳C to +85掳C) temperature range.
Pin Configurations
GND
W1
TOP VIEW
12
DIN 13
N.C. 14
N.C. 15
SCLK 16
1
CS
INTERFACE
11
10
H1
9
8
7
V
SS
N.C.
N.C.
V
DD
MAX5494
MAX5495
L1
6
5
W2
L2
10
L1
N.C. 14
N.C. 15
INTERFACE
Gain and Offset Adjustment
LCD Contrast Adjustment
Pressure Sensors
Low-Drift Programmable-Gain Amplifiers
Mechanical Potentiometer Replacement
Volume Control
5mm
脳
5mm
脳
0.8mm TQFN
D.N.C.
9
8
7
V
SS
N.C.
N.C.
V
DD
GND
W1
12
DIN 13
11
Ordering Information
PART
MAX5494ETE
MAX5495ETE
TEMP RANGE
PIN-
PACKAGE
PKG CODE
T1655-2
T1655-2
SCLK 16
MAX5496
MAX5497
H2
Applications
2
3
4
6
5
-40掳C to +85掳C 16 TQFN-EP*
-40掳C to +85掳C 16 TQFN-EP*
1
CS
2
W2
3
L2
4
D.N.C.
*EP
= Exposed pad.
Ordering Information continued at end of data sheet.
Selector Guide appears at end of data sheet.
SPI is a trademark of Motorola, Inc.
5mm
脳
5mm
脳
0.8mm TQFN
Pin Configurations continued at end of data sheet.
1
________________________________________________________________
Maxim Integrated Products
For pricing delivery, and ordering information please contact Maxim Direct at 1-888-629-4642,
or visit Maxim鈥檚 website at www.maxim-ic.com.

MAX5494 PDF文件相关型号

MAX5495,MAX5496,MAX5498

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