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.
♦
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
Features
♦
Miniature SC70 and SOT23 Packages
MAX5460–MAX5468
Applications
LCD Screen Adjustment
Volume Control
Mechanical Potentiometer Replacement
Gain Adjustment
Line Impedance Matching
MAX5460EXK
MAX5461EXT
MAX5462EXT
MAX5463EXK
MAX5464EXT
MAX5465EXT
MAX5466EUK
MAX5467EUT
MAX5468EUT
PART
Ordering Information
PIN-
PACKAGE
5 SC70
6 SC70
6 SC70
5 SC70
6 SC70
6 SC70
5 SOT23
6 SOT23
6 SOT23
TOP
MARK
ACA
AAP
AAQ
ACB
AAR
AAS
ADQQ
AARH
AARI
R
(kΩ)
100
100
100
50
50
50
10
10
10
PKG
CODE
X5-1
X6S-1
X6S-1
X5-1
X6S-1
X6S-1
U5-1
U6-1
U6-1
FleaPoT is a trademark of Maxim Integrated Products Inc.
Functional Diagram appears at end of data sheet.
Note:
All devices operate over the -40°C to +85°C temperature
range.
Pin Configurations
TOP VIEW
V
DD
1
5
H
V
DD
1
6
H
V
DD
1
6
H
GND
2
GND
2
5
L
GND
2
5
W
U/D
3
MAX5460
MAX5463
MAX5466
SOT23, SC70
4
CS
U/D
3
MAX5461
MAX5464
MAX5467
SOT23, SC70
4
CS
U/D
3
MAX5462
MAX5465
MAX5468
SOT23, SC70
4
CS
________________________________________________________________
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.
32-Tap FleaPoT
™
, 2-Wire Digital
Potentiometers
MAX5460–MAX5468
ABSOLUTE MAXIMUM RATINGS
V
DD
to GND ..............................................................-0.3V to +6V
All Other Pins to GND.................................-0.3V to (V
DD
+ 0.3)V
Input and Output Latch-Up Immunity.............................±200mA
Maximum Continuous Current into H, L, and W
MAX5460/MAX5461/MAX5462 (100kΩ) .......................±0.6mA
MAX5463/MAX5464/MAX5465 (50kΩ) .........................±1.3mA
MAX5466/MAX5467/MAX5468 (10kΩ) .........................±1.3mA
Continuous Power Dissipation (T
A
= +70°C)
5-pin SC70 (derate 3.1mW/°C above T
A
= +70°C)..........247mW
5-pin SOT23 (derate 7.1mW/°C above T
A
= +70°C)........571mW
6-pin SC70 (derate 3.1mW/°C above T
A
= +70°C) ..........245mW
6-pin SOT23 (derate 8.7mW/°C above T
A
= +70°C).....695.7mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Soldering Temperature (soldering, 10s) ..........................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V
DD
= +2.7V to +5.5V, V
H
= V
DD
, V
L
= 0, T
A
= -40°C to +85°C. Typical values are at V
DD
= +2.7V, T
A
= +25°C, unless
otherwise noted.)
PARAMETER
DC PERFORMANCE
Resolution
MAX5460/MAX5461/MAX5462
End-to-End Resistance
End-to-End Resistance Tempco
Ratiometric Resistance Tempco
Integral Nonlinearity
Differential Nonlinearity
Full-Scale Error
Zero-Scale Error
Wiper Resistance
DIGITAL INPUTS
Input High Voltage
Input Low Voltage
U/D Mode to
CS
Setup
CS
to U/D Step Setup
CS
to U/D Step Hold
U/D Step Low Period
U/D Step High Period
Up/Down Toggle Rate (Note 1)
Output Settling Time (Note 2)
V
IH
V
IL
t
CU
t
CI
t
IC
t
IL
t
IH
f
TOGGLE
t
SETTLE
100kΩ variable resistor configuration, C
L
= 10pF
100kΩ potentiometer configuration, C
L
= 10pF
25
50
25
25
25
1
1
0.25
0.7
x
V
DD
0.3
x
V
DD
V
V
ns
ns
ns
ns
ns
MHz
µs
R
W
MAX5462/MAX5465
MAX5468
600
160
INL
DNL
±0.1
1
1200
240
TC
R
MAX5463/MAX5464/MAX5465
MAX5466/MAX5467/MAX5468
32
75
37.5
7.5
100
50
10
35
5
±0.5
±1
±1
125
62.5
12.5
ppm/°C
ppm/°C
LSB
LSB
LSB
LSB
Ω
kΩ
Taps
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
TIMING CHARACTERISTICS
(Figures 1, 2)
2
_______________________________________________________________________________________
32-Tap FleaPoT
™
, 2-Wire Digital
Potentiometers
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= +2.7V to +5.5V, V
H
= V
DD
, V
L
= 0, T
A
= -40°C to +85°C. Typical values are at V
DD
= +2.7V, T
A
= +25°C, unless
otherwise noted.)
PARAMETER
POWER SUPPLIES
Supply Voltage
Active Supply Current (Note 3)
Standby Supply Current (Note 4)
V
DD
I
DD
I
SD
V
DD
= +5V
0.3
2.7
5.5
25
1
V
µA
µA
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAX5460–MAX5468
Note 1:
Up/Down Toggle Rate:
f
TOGGLE
=
1
t
SETTLE
Note 2:
Typical settling times are dependent on end-to-end resistance.
Note 3:
Supply current taken while changing wiper tap, f
TOGGLE
= 1MHz.
Note 4:
Supply current taken while wiper position is fixed.
Typical Operating Characteristics
(T
A
= +25°C, unless otherwise noted.)
WIPER RESISTANCE vs. WIPER VOLTAGE
(MAX5460–MAX5465)
MAX5460 toc01
WIPER RESISTANCE vs. WIPER VOLTAGE
(MAX5466/MAX5467/MAX5468)
MAX5460 toc02
END-TO-END RESISTANCE % CHANGE
vs. TEMPERATURE
END-TO-END RESISTANCE % CHNAGE
MAX5460 toc03
700
600
WIPER RESISTANCE (Ω)
500
400
300
200
100
0
0
V
DD
= +5V
V
DD
= +2.7V
200
180
160
WIPER RESISTANCE (Ω)
140
120
100
80
60
40
20
0
V
DD
= +5V
V
DD
= +2.7V
0.10
0.05
0
-0.05
-0.10
-0.15
-0.20
-0.25
50kΩ, 100kΩ
10kΩ
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
WIPER VOLTAGE (V)
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
WIPER VOLTAGE (V)
-40
-15
10
35
60
85
TEMPERATURE (°C)
W-TO-L RESISTANCE
vs. TAP POSITION
MAX5460 toc04
SUPPLY CURRENT vs. TEMPERATURE
0.45
0.40
0.35
CURRENT (µA)
0.30
0.25
0.20
0.15
0.10
V
DD
= +2.7V
OUTPUT
W
100mV/div
60
85
V
DD
= +5V
MAX5460 toc05
TAP-TO-TAP SWITCHING TRANSIENT
(MAX5460)
MAX5460 toc06
120
100
RESISTANCE (kΩ)
100kΩ
80
60
50kΩ
40
20
0
1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31
TAP POSITION
0.50
U/D
2V/div
10kΩ
0.05
0.00
-40
-15
10
35
200ns/div
TEMPERATURE (°C)
_______________________________________________________________________________________
3
32-Tap FleaPoT
™
, 2-Wire Digital
Potentiometers
MAX5460–MAX5468
Typical Operating Characteristics (continued)
(T
A
= +25°C, unless otherwise noted.)
R-DNL ERROR vs. INPUT CODE (100kΩ)
MAX5460 toc07
R-INL ERROR vs. INPUT CODE (100kΩ)
MAX5460 toc08
R-DNL ERROR vs. INPUT CODE (50kΩ)
0.02
0
R-DNL (LSB)
-0.02
-0.04
-0.06
-0.08
-0.10
-0.12
-0.14
MAX5460 toc09
0.08
0.06
0.04
R-DNL (LSB)
0.02
0
-0.02
-0.04
-0.06
-0.08
-0.10
0
5
10
15
20
25
30
INPUT CODE (DECIMAL)
0.10
0.08
0.06
0.04
R-INL (LSB)
0.02
0
-0.02
-0.04
-0.06
-0.08
-0.10
0
5
10
15
20
25
30
INPUT CODE (DECIMAL)
0.04
0
5
10
15
20
25
30
INPUT CODE (DECIMAL)
R-INL ERROR vs. INPUT CODE (50kΩ)
MAX5460 toc10
R-DNL ERROR vs. INPUT CODE (10kΩ)
MAX5460 toc11
R-INL ERROR vs. INPUT CODE (10kΩ)
0.25
0.20
R-INL (LSB)
0.15
0.10
0.05
0
-0.05
-0.10
-0.15
MAX5460 toc12
0.20
0.15
0.10
0.15
0.10
0.05
R-DNL LSB
0.30
R-INL LSB
0
-0.05
-0.10
-0.15
0.05
0
-0.05
-0.10
0
5
10
15
20
25
30
INPUT CODE (DECIMAL)
-0.20
-0.25
0
5
25
20
INPUT CODE (DECIMAL)
10
15
30
0
5
10
15
20
25
30
INPUT CODE (DECIMAL)
Pin Description
PIN
MAX5460
MAX5463
MAX5466
1
2
3
MAX5461
MAX5464
MAX5467
1
2
3
MAX5462
MAX5465
MAX5468
1
2
3
NAME
FUNCTION
V
DD
GND
U/D
Power Supply
Ground
Up/Down Control Input. With
CS
low, a low-to-high
transition increments or decrements the wiper position.
Chip Select Input. A high-to-low
CS
transition
determines the mode: increment if U/D is high, or
decrement if U/D is low.
High Terminal of Resistor
Low Terminal of Resistor
Wiper Terminal of Resistor
4
5
—
—
4
6
5
—
4
6
—
5
CS
H
L
W
4
_______________________________________________________________________________________
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).
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.
MAX5460–MAX5468
CS
t
CU
t
IL
U/D
t
CI
t
SETTLE
W
t
IH
t
SETTLE
t
IC
NOTE: "W" IS NOT A DIGITAL SIGNAL. IT REPRESENTS WIPER TRANSITIONS.
Figure 1. Serial Interface Timing Diagram, Increment Mode
CS
t
CU
t
IH
U/D
t
IC
t
IL
t
CI
W
t
SETTLE
t
SETTLE
NOTE: "W" IS NOT A DIGITAL SIGNAL. IT REPRESENTS WIPER TRANSITIONS.
Figure 2. Serial Interface Timing Diagram, Decrement Mode
_______________________________________________________________________________________
5
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