Linear-Taper Digital Potentiometers - Maxim Integrated Products
Description
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DataSheet.
co.
kr
19-2462; Rev 2; 3/05
KIT ATION EVALU BLE A IL A V A
One-Time Programmable, Linear-Taper Digital Potentiometers
General Description Features
♦ Wiper Position Stored After One-Time Fuse Programming ♦ User-Defined Power-On Reset Position ♦ 35ppm/°C End-to-End Temperature Coefficient and 5ppm/°C Ratiometric Temperature Coefficient ♦ 32 Tap Positions ♦ Tiny 8-Pin Thin QFN and µMAX Packages ♦ Ultra-Low 1.
5µA (max) Static Supply Current ♦ 2.
7V to 5.
5V Single-Supply Operation ♦ Wiper Position Programmed Through Simple 2-Wire Serial Interface ♦ 10kΩ, 50kΩ, and 100kΩ 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’s power-on reset (POR) position 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 100kΩ, the MAX5428 a resistance of 50kΩ, and the MAX5429 a resistance of 10kΩ.
All these devices have 32 wiper positions, operate from a single 2.
7V to 5.
5V supply, and use less than 1.
5µA (max) static supply current.
The MAX5427/MAX5428/MAX5429 are available in 8-pin thin QFN and µMAX® packages.
Each device is guaranteed over the extended temperature range of -40°C to +85°C.
Ordering Information
PART MAX5427EUA MAX5427ETA MAX5428EUA MAX5428ETA MAX5429EUA MAX5429ETA TEMP RANGE -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C PIN-PACKAGE 8 µMAX 8 Thin QFN-EP* 8 µMAX 8 Thin QFN-EP* 8 µMAX 8 Thin QFN-EP* R (kΩ) 100 100 50 50 10 10
Applications
Mechanical Potentiometer Replacement Products Using One-Time Factory Calibration
Pin Configurations
TOP VIEW
W CS VDD GND
1 2 3 4
MAX5427 MAX5428 MAX5429
8 7 6 5
H L U/D VPP
*EP = Exposed ...
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