19-3665; Rev 1; 7/09
One-Time Programmable, Linear-Taper Digital
Potentiometers
78/MAX529
General Description
Features
♦ Wiper Position Stored After One-Time Fuse
The MAX5527/MAX5528/MAX5529 linear-taper digital
potentiometers perform the same function as mechanical
potentiometers, replacing the mechanics with a simple
2-wire up/down digital interface. These digital poten-
tiometers provide an optional one-time programmable
feature that sets the power-on reset position of the wiper.
Once the wiper position is programmed, the 2-wire inter-
face can be disabled to prevent unwanted adjustment.
Programming
♦ 64 Tap Positions
♦ Wiper Position Programmed Through Simple
2-Wire Up/Down Interface
♦ 35ppm/°C End-to-End Temperature Coefficient
♦ 5ppm/°C Ratiometric Temperature Coefficient
♦ Ultra-Low 1.5μA (max) Static Supply Current
♦ +2.7V to +5.5V Single-Supply Operation
♦ 10kΩ, 50kΩ, and 100kΩ End-to-End Resistances
♦ Tiny, 3mm x 3mm, 8-Pin TDFN and 5mm x 3mm,
The MAX5527/MAX5528/MAX5529 provide an end-to-end
resistance of 100kΩ, 50kΩ, and 10kΩ, respectively. The
devices feature low temperature coefficients of 35ppm/°C
end-to-end and 5ppm/°C ratiometric. All devices offer 64
wiper positions and operate from a single +2.7V to +5.5V
supply. An ultra-low, 0.25µA (typ) standby supply current
saves power in battery-operated applications.
8-Pin µMAX Packages
Ordering Information
The MAX5527/MAX5528/MAX5529 are available in
3mm x 3mm, 8-pin TDFN and 5mm x 3mm, 8-pin
µMAX® packages. Each device is guaranteed over the
-40°C to +105°C temperature range.
RESISTANCE
TOP
PART
PIN-PACKAGE
(kΩ)
MARK
MAX5527GTA+ 8 TDFN-EP*
MAX5527GUA+ 8 µMAX
MAX5528GTA+ 8 TDFN-EP*
MAX5528GUA+ 8 µMAX
MAX5529GTA+ 8 TDFN-EP*
MAX5529GUA+ 8 µMAX
100
100
50
AOG
—
Applications
Products Using One-Time Factory Calibration
AOH
—
50
Mechanical Potentiometer Replacements
10
AOI
—
Pin Configurations
10
TOP VIEW
+Denotes a lead(Pb)-free/RoHs-compliant package.
*EP = Exposed pad.
1
2
8
W
H
Note: All devices are specified over the -40°C to +85°C operat-
ing temperature range.
CS
L
7
MAX5527
MAX5528
MAX5529
V
DD
Functional Diagram
3
4
6
5
U/D
H
GND
PV
S
S
63
62
μMAX
R
R
62
61
MAX5527
MAX5528
MAX5529
V
DD
8
7
6
5
GND
CS
S
S
R
61
2
W
UP/DOWN
COUNTER
64-
POSITION
DECODER
U/D
W
MAX5527
MAX5528
MAX5529
ONE-TIME
PROGRAM
BLOCK
R
R
1
0
PV
S
S
1
0
1
2
3
4
TDFN*
*EXPOSED PADDLE. CONNECT TO GND.
L
µMAX is a registered trademark of Maxim Integrated Products, Inc.
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.