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MAX5427, MAX5428, MAX5429
32-Tap, One-Time Programmable, Linear-Taper Digital Potentiometers
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Status
Active: In Production.
Description
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.
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Data Sheet
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An evaluation kit is available: MAX5427EVKIT
Key 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 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
- EV Kit Available
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Applications/Uses
- Mechanical Potentiometer Replacements
- Products Using One-Time Factory Calibration
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Key Specifications:
| Digital Potentiometers |
| Part Number |
Taper |
POTs |
Control Interface |
Wiper Memory |
Steps |
REND-TO-END
(kΩ) |
Res. Tol.
(%) |
Temp. Coeff.
(ppm/°C) |
Wiper Resistance
(Ω) |
ICC @5V
(µA) |
Smallest Available Pckg.
(mm2) |
Budgetary Price |
| typ |
typ |
max |
max w/pins |
See Notes |
| MAX5427 |
Linear |
1 |
Up/Down |
Non-Volatile OTP |
32 |
100 |
25 |
35 |
100 |
1.5 |
9.6 |
$0.69 @1k |
| MAX5428 |
50 |
$0.69 @1k |
| MAX5429 |
10 |
$0.69 @1k |
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See All Digital Potentiometers (126)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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Diagram
Functional Block Diagram
More Information
Didn't Find What You Need?
Information Index
Document Ref.: 19-2462
Rev 2;
2005-04-04
This page last modified: 2009-10-14
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