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Dual, 256-Tap, Low-Drift, Digital Potentiometers
in 14-Pin TSSOP
General Description
The MAX5413/MAX5414/MAX5415 is a family of dual
linear taper digital potentiometers. Each device has two
3-terminal potentiometers. The MAX5413/MAX5414/
MAX5415 operate from +2.7V to +5.5V single-supply
voltages and use an ultra-low 0.1µA supply current.
These devices also provide glitchless switching
between resistor taps, as well as a convenient power-
on reset (POR) that sets the wiper to the midscale posi-
tion at power-up. Each potentiometer consists of a fixed
resistor with a wiper contact that is digitally controlled
through a 3-wire serial interface and has 256 tap points.
It performs the same function as a discrete potentiome-
ter or variable resistor.
These parts are ideal for applications requiring digitally
controlled resistors. Three resistance values are avail-
able: 10kΩ (MAX5413), 50kΩ (MAX5414), and 100kΩ
(MAX5415). A nominal resistor temperature coefficient
of 35ppm/°C end-to-end and 5ppm/°C ratiometric make
the MAX5413/MAX5414/MAX5415 ideal for applications
requiring low temperature-coefficient variable resistors,
such as adjustable-gain circuit configurations.
The MAX5413/MAX5414/MAX5415 are available in a 14-
pin TSSOP package. Each device is guaranteed over the
extended industrial temperature range (-40°C to +85°C).
o
256 Tap Positions
o
Ultra-Low 0.1µA Supply Current
o
+2.7V to +5.5V Single-Supply Operation
o
Two Independent Potentiometers in a Package
o
Low End-to-End Temperature Coefficient
35ppm/°C
o
Low Ratiometric Temperature Coefficient
5ppm/°C
o
Power-On Reset: Wiper Goes to Midscale
(Position 128)
o
Glitchless Switching Between Resistor Taps
o
3-Wire SPI™-Interface Compatible
o
10kΩ/50kΩ/100kΩ Resistor Values
Features
o
14-Pin TSSOP Small-Footprint Package
MAX5413/MAX5414/MAX5415
Applications
Mechanical Potentiometer Replacement
Low-Drift Programmable Gain Amplifier (PGA)
Volume Control
LCD Screen Adjustment
Adjustable Voltage Reference
Programmable Filters, Delays, Time Constant
Impedance Matching
PART
MAX5413EUD
MAX5414EUD
MAX5415EUD
Ordering Information
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
14 TSSOP
14 TSSOP
14 TSSOP
R (kΩ)
10
50
100
Pin Configuration
TOP VIEW
GND 1
L
B
H
B
2
3
14 L
A
13 H
A
12 W
A
W
B
4
N.C. 5
N.C. 6
CS 7
MAX5413
MAX5414
MAX5415
11 V
DD
10 N.C.
9
8
SCLK
DIN
SPI is a trademark of Motorola, Inc.
TSSOP
________________________________________________________________
Maxim Integrated Products
1
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Dual, 256-Tap, Low-Drift, Digital Potentiometers
in 14-Pin TSSOP
MAX5413/MAX5414/MAX5415
ABSOLUTE MAXIMUM RATINGS
V
DD
to GND ..............................................................-0.3V to +6V
DIN, SCLK,
CS
.........................................................-0.3V to +6V
H
X
, L
X
, W
X
to GND ........................................-0.3V to (V
DD
+0.3)
Maximum Continuous Current into H
X
, L
X
, and W
X
............±1mA
Continuous Power Dissipation (T
A
= +70°C)
14-Pin TSSOP (derate 9.1mW/°C above +70°C) .........727mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead 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
= +5V, unless otherwise noted. V
H
= V
DD
, V
L
= 0, T
A
= T
MIN
to T
MAX
. Typical values are at V
DD
= +5V, T
A
= +25°C,
unless otherwise noted.)
PARAMETER
Resolution
Integral Nonlinearity (Notes 1, 2)
Differential Nonlinearity (Notes 1, 2)
End-to-End Resistor Tempco
Ratiometric Resistor Tempco
MAX5413
Full-Scale Error
MAX5414
MAX5415
MAX5413
Zero-Scale Error
DC PERFORMANCE
(Variable-Resistor Mode)
Resolution
N
V
DD
= +5V
Integral Nonlinearity (Notes 1, 3)
INL
V
DD
= +3V
V
DD
= +5V
V
DD
= +3V
V
DD
= +5V
V
DD
= +3V
MAX5413
MAX5414/MAX5415
MAX5413
End-to-End Resistance
R
HL
MAX5414
MAX5415
7.5
37.5
75
50
30
10
50
100
12.5
62.5
125
kΩ
275
550
MAX5413
MAX5414
MAX5415
Differential Nonlinearity
(Notes 1, 3)
DNL
8
±1
±3
±1.5
±1.5
±1/2
LSB
LSB
Bits
LSB
MAX5414
MAX5415
SYMBOL
N
INL
DNL
TC
R
35
5
-8
-1.6
0.8
+8
+1.6
+0.8
LSB
LSB
CONDITIONS
MIN
8
±1/2
±1/2
TYP
MAX
UNITS
Bits
LSB
LSB
ppm/°C
ppm/°C
DC PERFORMANCE
(Voltage-Divider Mode)
DC PERFORMANCE
(Resistor Characteristics)
Wiper Resistance (Note 4)
Wiper Capacitance
R
W
C
W
Ω
pF
2
_______________________________________________________________________________________
Dual, 256-Tap, Low-Drift, Digital Potentiometers
in 14-Pin TSSOP
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= +5V, unless otherwise noted. V
H
= V
DD
, V
L
= 0, T
A
= T
MIN
to T
MAX
. Typical values are at V
DD
= +5V, T
A
= +25°C,
unless otherwise noted.)
PARAMETER
DIGITAL INPUTS
Input High Voltage
Input Low Voltage
Input Leakage Current
Input Capacitance
TIMING CHARACTERISTICS (ANALOG)
MAX5413
Wiper-Settling Time
t
S
MAX5414
MAX5415
TIMING CHARACTERISTICS (DIGITAL)
(Note 5)
Maximum SCLK Frequency
SCLK Clock Period
SCLK Pulse Width High
SCLK Pulse Width Low
CS
Fall to SCLK Rise Setup Time
SCLK Rise to
CS
Rise Hold Time
DIN Setup Time
DIN Hold Time
SCLK Rise to
CS
Fall Delay
CS
Rise to SCLK Rise Hold
CS
Pulse Width High
POWER SUPPLIES
Supply Voltage
Supply Current
V
DD
I
DD
CS
= SCLK = DIN = V
DD
V
DD
= +5V
V
DD
= +2.7V
2.7
0.8
0.1
5.5
5
V
µA
µA
t
CP
t
CH
t
CL
t
CSS
t
CSH
t
DS
t
DH
t
CS0
t
CS1
t
CSW
10
100
40
40
40
0
40
0
10
40
100
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
100
325
650
ns
5
V
IH
V
IL
0.7 x V
DD
0.3 x V
DD
±1.0
V
V
µA
pF
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAX5413/MAX5414/MAX5415
Note 1:
Linearity is defined in terms of the H
X
to L
X
code-dependent resistance.
Note 2:
The DNL and INL are measured with the potentiometer configured as a voltage-divider with H
X
= V
DD
and L
X
= 0. The wiper
terminal is unloaded and measured with an ideal voltmeter.
Note 3:
The DNL and INL are measured with the potentiometer configured as a variable resistor. H
X
is unconnected and L
X
= 0. At
V
DD
= +5V, the wiper terminal is driven with a source current of 400µA for the 10kΩ configuration, 80µA for the 50kΩ config-
uration, and 40µA for the 100kΩ configuration. At V
DD
= +3V, 200µA/40µA/20µA for 10kΩ/50kΩ/100kΩ configurations,
respectively.
Note 4:
The wiper resistance is the worst value measured by injecting into W
X
, a current I
W
= V
DD
/ R
HL
.
Note 5:
Digital timing is guaranteed by design.
_______________________________________________________________________________________
3
Dual, 256-Tap, Low-Drift, Digital Potentiometers
in 14-Pin TSSOP
MAX5413/MAX5414/MAX5415
Typical Operating Characteristics
(V
DD
= +5.0V, T
A
= +25°C, unless otherwise noted.)
WIPER RESISTANCE
vs. WIPER VOLTAGE (10kΩ)
MAX5413 toc01
WIPER RESISTANCE
vs. WIPER VOLTAGE (50kΩ)
MAX5413 toc02
WIPER RESISTANCE
vs. WIPER VOLTAGE (100kΩ)
MAX5413 toc03
MAX5413 toc09
MAX5413 toc06
300
280
WIPER RESISTANCE (Ω)
260
240
220
200
180
160
0
V
DD
= +5V
V
DD
= +3V
380
360
340
WIPER RESISTANCE (Ω)
320
300
280
260
240
220
200
180
160
V
DD
= +5V
V
DD
= +3V
400
380
WIPER RESISTANCE (Ω)
360
340
320
300
280
260
240
220
200
180
160
V
DD
= +5V
V
DD
= +3V
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)
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
WIPER VOLTAGE (V)
WIPER RESISTANCE
vs. INPUT CODE (10kΩ)
MAX5413 toc04
WIPER RESISTANCE
vs. INPUT CODE (50kΩ)
45
W-TO-L RESISTANCE (kΩ)
40
35
30
25
20
15
10
5
0
MAX5413 toc05
WIPER RESISTANCE
vs. INPUT CODE (100kΩ)
100
90
W-TO-L RESISTANCE (kΩ)
80
70
60
50
40
30
20
10
0
10
9
W-TO-L RESISTANCE (kΩ)
8
7
6
5
4
3
2
1
0
0
32
64
96
50
128 160 192 224 256
0
32
64
96
128 160 192 224 256
0
32
64
96
128 160 192 224 256
INPUT CODE (DECIMAL)
INPUT CODE (DECIMAL)
INPUT CODE (DECIMAL)
VARIABLE RESISTOR DNL
vs. INPUT CODE (10kΩ)
MAX5413 toc07
VARIABLE RESISTOR INL
vs. INPUT CODE (10kΩ)
0.40
0.30
INL (LSB)
DNL (LSB)
0.20
0.10
0.00
-0.10
MAX5413 toc08
VARIABLE RESISTOR DNL
vs. INPUT CODE (50kΩ)
0.06
0.05
0.04
0.03
0.02
0.01
0.00
-0.01
-0.02
-0.03
V
DD
= +5V
0.20
0.50
0.15
DNL (LSB)
0.10
0.05
0.00
-0.20
-0.05
0
32
64
96
128 160 192 224 256
INPUT CODE (DECIMAL)
-0.30
0
32
64
96
128 160 192 224 256
INPUT CODE (DECIMAL)
0
32
64
96
128 160 192 224 256
INPUT CODE (DECIMAL)
4
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