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MAX5427 Datasheet

  • MAX5427

  • " One-Time Programmable, Linear-Taper Digital Potentiometers...

  • Maxim   Maxim

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19-2462; Rev 1; 7/02
KIT
ATION
EVALU
LE
B
AVAILA
One-Time Programmable, Linear-Taper
Digital Potentiometers
General Description
Features
o
Wiper Position Stored After One-Time Fuse
Programming
o
User-Defined Power-On Reset Position
o
35ppm/擄C End-to-End Temperature Coefficient
and 5ppm/擄C Ratiometric Temperature Coefficient
o
32 Tap Positions
o
Tiny 8-Pin Thin QFN and 碌MAX Packages
o
Ultra-Low 1.5碌A(chǔ) (max) Static Supply Current
o
2.7V to 5.5V Single-Supply Operation
o
Wiper Position Programmed Through Simple
2-Wire Serial Interface
o
10k鈩? 50k鈩? and 100k鈩?End-to-End Resistances
MAX5427/MAX5428/MAX5429
The MAX5427/MAX5428/MAX5429 linear-taper digital
potentiometers function as mechanical potentiometers,
but replace the mechanics with a simple 2-wire digital
interface. These digital potentiometers are unique in that
they have an optional one-time programmable feature
that either sets the wiper鈥檚 power-on reset (POR) posi-
tion to a user-defined value, or the wiper can be set and
the interface disabled to prevent further adjustment.
The MAX5427 has an end-to-end resistance of 100k鈩?
the MAX5428 a resistance of 50k鈩? and the MAX5429 a
resistance of 10k鈩? All these devices have 32 wiper
positions, operate from a single 2.7V to 5.5V supply, and
use less than 1.5碌A(chǔ) (max) static supply current.
The MAX5427/MAX5428/MAX5429 are available in
8-pin thin QFN and 碌MAX packages. Each device is
guaranteed over the extended temperature range of
-40擄C to +85擄C.
Ordering Information
PART
MAX5427EUA
MAX5427ETA
MAX5428EUA
MAX5428ETA
MAX5429EUA
MAX5429ETA
TEMP RANGE
-40擄C to +85擄C
-40擄C to +85擄C
-40擄C to +85擄C
-40擄C to +85擄C
-40擄C to +85擄C
-40擄C to +85擄C
PIN-PACKAGE
8 碌MAX
8 Thin QFN-EP*
8 碌MAX
8 Thin QFN-EP*
8 碌MAX
8 Thin QFN-EP*
R (k鈩?
100
100
50
50
10
10
Applications
Mechanical Potentiometer Replacement
Products Using One-Time Factory Calibration
Pin Configurations
TOP VIEW
*EP
= Exposed paddle.
W
CS
V
DD
GND
1
2
3
4
MAX5427
MAX5428
MAX5429
8
H
7
L
6
U/D
5
V
PP
V
DD
GND
3
4
Functional Block Diagram
H
8
S
32
MAX5427
MAX5428
MAX5429
R
31
碌MAX
S
31
R
30
*
W
CS
V
DD
GND
1
2
3
4
MAX5427
MAX5428
MAX5429
*
8
H
7
L
6
U/D
5
V
PP
CS
U/D
2
6
UP/DOWN
COUNTER
32-
POSITION
DECODER
R
2
S
30
S
3
R
W
1
W
V
PP
5
ONE-TIME
PROGRAM
BLOCK
R
1
S
2
S
1
QFN
7
*EXPOSED PADDLE. CONNECTED TO GND.
L
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim鈥檚 website at www.maxim-ic.com.

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