MAX5527, MAX5528, MAX5529 64-Tap, One-Time Programmable, Linear-Taper Digital Potentiometers 0 pages

General Description
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 potentiometers
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 interface
can be disabled to prevent unwanted adjustment.
The MAX5527/MAX5528/MAX5529 provide an end-to-end
resistance of 100kÙ, 50kÙ, and 10kÙ, 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, 0.25ìA (typ) standby supply current
saves power in battery-operated applications.
The MAX5527/MAX5528/MAX5529 are available in
3mm x 3mm, 8-pin TDFN and 5mm x 3mm, 8-pin
ìMAX® packages. Each device is guaranteed over the
-40°C to +105°C temperature range.
Applications
Products Using One-Time Factory Calibration
Mechanical Potentiometer Replacements
Features
Wiper Position Stored After One-Time Fuse
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 1.5ìA (max) Static Supply Current
+2.7V to +5.5V Single-Supply Operation
10kÙ, 50kÙ, and 100kÙ End-to-End Resistances
Tiny, 3mm x 3mm, 8-Pin TDFN and 5mm x 3mm,
8-Pin ìMAX Packages
MAX5527/MAX5528/MAX5529
One-Time Programmable, Linear-Taper Digital
Potentiometers
________________________________________________________________ Maxim Integrated Products 1
Ordering Information
19-3665; Rev 1; 7/09
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.
EVALUATION KIT
AVAILABLE
PART PIN-PACKAGE
RESISTANCE
(kÙ)
TOP
MARK
MAX5527GTA+ 8 TDFN-EP* 100 AOG
MAX5527GUA+ 8 ìMAX 100 —
MAX5528GTA+ 8 TDFN-EP* 50 AOH
MAX5528GUA+ 8 ìMAX 50 —
MAX5529GTA+ 8 TDFN-EP* 10 AOI
MAX5529GUA+ 8 ìMAX 10 —
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
Note: All devices are specified over the -40°C to +105°C operating
temperature range.
1 H
VDD
CS
GND
ìMAX
TDFN*
TOP VIEW
2
3
4
L
U/D
PV
8
7
6
5
W
*EXPOSED PADDLE. CONNECT TO GND.
MAX5527
MAX5528
MAX5529
1
H
VDD
CS
GND
2 3 4
L
U/D
PV
8 7 6 5
W
MAX5527
MAX5528
MAX5529
Pin Configurations
ìMAX is a registered trademark of Maxim Integrated Products, Inc.
Functional Diagram
MAX5527
MAX5528
MAX5529
64-
POSITION
DECODER
UP/DOWN
COUNTER
ONE-TIME
PROGRAM
BLOCK
VDD
GND
CS
U/D
PV
L
H
W
R62
R61
R1
R0
S63
S62
S61
S2
S1
S0
RW