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PDF MAX5468EUT Data sheet ( Hoja de datos )
| Número de pieza | MAX5468EUT | |
| Descripción | 32-Tap FleaPoT / 2-Wire Digital Potentiometers | |
| Fabricantes | Maxim Integrated | |
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19-1956; Rev 3; 11/05
32-Tap FleaPoT™, 2-Wire Digital
Potentiometers
General Description
The MAX5460–MAX5468 linear-taper digital potentiome-
ters perform the same function as a mechanical poten-
tiometer or a variable resistor. These devices consist of a
fixed resistor and a wiper contact with 32-tap points that
are digitally controlled through a 2-wire serial interface.
The MAX5462/MAX5465/MAX5468 are configured as
potentiometers. The rest of the devices in this family are
configured as variable resistors. See Pin Configurations
for part functionality.
Three resistance values are available: 10kΩ (MAX5466/
MAX5467/MAX5468), 50kΩ (MAX5463/MAX5464/
MAX5465), and 100kΩ (MAX5460/MAX5461/MAX5462).
The MAX5460–MAX5465 (100kΩ and 50kΩ) are avail-
able in space-saving 5-pin and 6-pin SC70 packages.
The MAX5466/MAX5467/MAX5468 (10kΩ) are available
in 5-pin and 6-pin SOT23 packages.
Applications
LCD Screen Adjustment
Volume Control
Mechanical Potentiometer Replacement
Gain Adjustment
Line Impedance Matching
FleaPoT is a trademark of Maxim Integrated Products Inc.
Functional Diagram appears at end of data sheet.
Features
♦ Miniature SC70 and SOT23 Packages
♦ 0.3µA Ultra-Low Supply Current
♦ +2.7V to +5.5V Single-Supply Operation
♦ Glitchless Switching Between Resistor Taps
♦ Power-On Reset to Midscale
♦ 2-Wire Up/Down Serial Interface
♦ 10kΩ, 50kΩ, and 100kΩ Resistance Values
Ordering Information
PART
PIN-
TOP
PACKAGE MARK
R
(kΩ)
PKG
CODE
MAX5460EXK 5 SC70
ACA
100
X5-1
MAX5461EXT 6 SC70
AAP 100 X6S-1
MAX5462EXT 6 SC70
AAQ 100 X6S-1
MAX5463EXK 5 SC70
ACB
50
X5-1
MAX5464EXT 6 SC70
AAR 50 X6S-1
MAX5465EXT 6 SC70
AAS 50 X6S-1
MAX5466EUK 5 SOT23
ADQQ
10
U5-1
MAX5467EUT 6 SOT23
AARH
10
U6-1
MAX5468EUT 6 SOT23
AARI
10
U6-1
Note: All devices operate over the -40°C to +85°C temperature
range.
Pin Configurations
TOP VIEW
VDD 1
5H
GND 2
U/D 3
MAX5460
MAX5463
MAX5466
4 CS
SOT23, SC70
VDD 1
6H
GND 2
5L
U/D 3
MAX5461
MAX5464
MAX5467
4 CS
SOT23, SC70
VDD 1
6H
GND 2
5W
U/D 3
MAX5462
MAX5465
MAX5468
4 CS
SOT23, SC70
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1 page  
32-Tap FleaPoT™, 2-Wire Digital
Potentiometers
Detailed Description
The MAX5460–MAX5468 consist of a fixed resistor and a
wiper contact with 32-tap points that are digitally con-
trolled through a 2-wire serial interface. Three resistance
values are available: 10kΩ (MAX5466/MAX5467/
MAX5468), 50kΩ (MAX5463/MAX5464/MAX5465), and
100kΩ (MAX5460/MAX5461/MAX5462).
The MAX5462/MAX5465/MAX5468 are designed to oper-
ate as potentiometers. In this configuration, the low termi-
nal of the resistor array is connected to ground (pin 2).
The MAX5461/MAX5464/MAX5467 perform as variable
resistors. In these devices, the wiper terminal and high
terminal of the resistor array are connected at pin 5.
The MAX5460/MAX5463/MAX5466 are similar variable
resistors, except the low terminal is connected to
ground (pin 2).
CS
Digital Interface Operation
The MAX5460–MAX5468 have two modes of operation
when the serial interface is active: increment and
decrement mode. The serial interface is only active
when CS is low.
The CS and U/D inputs control the position of the wiper
along the resistor array. When CS transitions from high to
low, the part will go into increment mode if U/D is high,
and into decrement mode if U/D is low. Once the mode is
set, the device will remain in that mode until CS goes high
again. A low-to-high transition at the U/D pin will incre-
ment or decrement the wiper position depending on the
current mode (Figures 1 and 2).
When the CS input transitions to high (serial interface
inactive), the value of the counter is stored and the
wiper position is maintained.
Note that when the wiper reaches the maximum (or mini-
mum) tap position, the wiper will not wrap around to the
minimum (or maximum) position.
tCU
U/D
W
tIL
tCI
tSETTLE
NOTE: "W" IS NOT A DIGITAL SIGNAL. IT REPRESENTS WIPER TRANSITIONS.
Figure 1. Serial Interface Timing Diagram, Increment Mode
CS
tCU
U/D
tIH
tIH
tIC
tSETTLE
tIC
tIL
tCI
W
tSETTLE
tSETTLE
NOTE: "W" IS NOT A DIGITAL SIGNAL. IT REPRESENTS WIPER TRANSITIONS.
Figure 2. Serial Interface Timing Diagram, Decrement Mode
_______________________________________________________________________________________ 5
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| PDF Descargar | [ Datasheet MAX5468EUT.PDF ] | |
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