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MAX5451EUD+T

P1-P3P4-P6P7-P9P10-P12
General Description
The MAX5450–MAX5455 are a family of dual digital
potentiometers that perform the same function as a
mechanical potentiometer or variable resistor. The
MAX5451/MAX5453/MAX5455 have two 3-terminal
potentiometers and the MAX5450/MAX5452/MAX5454
have two 2-terminal variable resistors. The MAX5450–
MAX5455 operate from a +2.7V to +5.5V single-supply
voltage and use an ultra-low supply current of 0.1µA.
These devices consist of two fixed resistors each
with 256 digitally-controlled wiper contacts. The conve-
nient power-on reset (POR) sets the wiper to midscale
position at power-up and the easy-to-use up/down
interface allows glitchless switching between
resistor taps. Six inputs control the 14-pin MAX5451/
MAX5453/MAX5455 potentiometers. Four inputs control
the 10-pin MAX5450/MAX5452/MAX5454 variable resis-
tors.
The MAX5450–MAX5455 are ideal for applications
requiring digitally-controlled resistors. Three resistance
values are available: 10kΩ, 50kΩ, and 100kΩ. An end-
to-end resistor temperature coefficient of 35ppm/°C
and a ratiometric temperature coefficient of 5ppm/°C
make the MAX5450–MAX5455 excellent choices for
adjustable gain circuit requiring low-temperature drift
The MAX5450–MAX5455 are available in 10-pin µMAX
®
and 14-pin TSSOP packages. Each device is guaran-
teed over the extended–industrial temperature range
(-40°C to +85°C).
Applications
Mechanical Potentiometer Replacement
Low-Drift Programmable-Gain Amplifier (PGA)
Volume Control
LCD Screen Adjustment
Adjustable Voltage References
Adjustable Linear Regulators
Programmable Filters, Delays, Time Constants
Impedance Matching
Features
♦ Small-Footprint Packages
10-Pin µMAX (MAX5450/MAX5452/MAX5454)
14-Pin TSSOP (MAX5451/MAX5453/MAX5455)
♦ 256-Tap Positions
♦ Independent Up/Down Potentiometer Controls
(MAX5451/MAX5453/MAX5455)
♦ Ultra-Low 0.1µA Supply Current
♦ +2.7V to +5.5V Single-Supply Operation
♦ Low 35ppm/°C End-to-End Temperature
Coefficient
♦ Power-On Reset Sets Wiper to Midscale
(Position 127)
♦ Glitchless Switching Between the Resistor Taps
♦ 10kΩ, 50kΩ, 100kΩ Resistance Values
MAX5450–MAX5455
Dual, 256-Tap, Up/Down Interface,
Digital Potentiometers
________________________________________________________________ Maxim Integrated Products 1
1
2
3
4
5
10
9
8
7
6
INC
GND
W2W1
V
DD
MAX5450
MAX5452
MAX5454
µMAX
TOP VIEW
L2L1
14
13
12
11
10
9
8
1
2
3
4
5
6
7
GNDV
DD
MAX5451
MAX5453
MAX5455
W2
H2
L2L1
H1
W1
TSSOP
U/D
CS1 CS2
INC1
INC2
U/D1
U/D2
CS2
CS1
Pin Configurations
19-1997; Rev 2; 2/06
Ordering Information
PART PIN-PACKAGE R (kΩ)
PKG
CODE
MAX5450EUB 10 µMAX 10 U10C-4
MAX5451EUD 14 TSSOP 10 U14-1
MAX5452EUB 10 µMAX 50 U10C-4
MAX5453EUD 14 TSSOP 50 U14-1
MAX5454EUB 10 µMAX 100 U10C-4
MAX5455EUD 14 TSSOP 100 U14-1
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.
Note: All devices specified over the -40°C to +85°C operating
range.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
MAX5450–MAX5455
Dual, 256-Tap, Up/Down Interface,
Digital Potentiometers
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
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.
V
DD
to GND..............................................................-0.3V to +6V
CS_, INC_, and U/D_ to GND...................................-0.3V to +6V
H_, L_, W_ to GND ......................................-0.3V to (V
DD
+0.3V)
Maximum Continuous Current into H_, L_, and W_............±1mA
Continuous Power Dissipation (T
A
= +70°C)
10-Pin µMAX (derate 6.94mW/°C above +70°C) ..........555mW
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
ELECTRICAL CHARACTERISTICS
(V
DD
= +2.7V to +5.5V, V
H
= V
DD
, V
L
= 0; T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V
DD
= +5V, T
A
= +25°C,
unless otherwise noted.)
PARAMETER SYM B O L CONDITIONS MIN TYP MAX UNITS
DC PERFORMANCE (Voltage-Divider Mode, MAX5451/MAX5453/MAX5455 Only)
Resolution N 8 Bits
V
DD
= +5V ±1
Integral Nonlinearity
(Notes 1 and 2)
INL
V
DD
= +3V ±1
LSB
V
DD
= +5V ±1
Differential Nonlinearity
(Notes 1 and 2)
DNL
V
DD
= +3V ±1
LSB
End-to-End Resistor Tempco TC
R
35 ppm/°C
Ratiometric Resistor Tempco 5 ppm/°C
MAX5451 -8
MAX5453 -1.6Full-Scale Error
MAX5455 -0.8
LSB
MAX5451 +8
MAX5453 +1.6
Zero-Scale Error
MAX5455 +0.8
LSB
DC PERFORMANCE (Variable Resistor Mode)
Resolution N 8 Bits
MAX5450, MAX5451 ±3
V
DD
= +5V
MAX5452–MAX5455 ±1
MAX5450, MAX5451 ±4.5
Integral Nonlinearity
(Notes 1 and 3)
INL
V
DD
= +3V
MAX5452–MAX5455 ±2
LSB
V
DD
= +5V ±1
Differential Nonlinearity
(Notes 1 and 3)
DNL
V
DD
= +3V ±1
LSB
DC PERFORMANCE (Resistor Characteristics)
V
DD
= +5V, MAX5451/MAX5453/MAX5455 225
Wiper Resistance (Note 4) R
W
V
DD
= +3V, MAX5451/MAX5453/MAX5455 550
Ω
Wiper Capacitance C
W
10 pF
MAX5450, MAX5451 6.5 10 12.5
MAX5452, MAX5453 32 50 62.5End-To-End Resistance R
HL
MAX5454, MAX5455 60 100 125
kΩ
MAX5450–MAX5455
Dual, 256-Tap, Up/Down Interface,
Digital Potentiometers
_______________________________________________________________________________________ 3
Note 1: Linearity is defined in terms of the H_ to L_ code-dependent resistance.
Note 2: The DNL and INL are measured with the potentiometer configured as a voltage divider with H_ = V
DD
and L_ = GND. 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. For the 3-terminal potentiometers
(MAX5451/MAX5453/MAX5455), H_ is unconnected and L_ = GND. For the 2-terminal potentiometers
(MAX5450/MAX5452/MAX5454), L_ = GND. At V
DD
= +5V, the wiper terminal is driven with a source current of 400µA for the
10kΩ configuration, 80µA for the 50kΩ configuration, and 40µA for the 100kΩ configuration. At V
DD
= +3V,
200µA/40µA/20µA for 10kΩ/50kΩ/100kΩ configuration, respectively.
Note 4: The wiper resistance is the worst value measured by injecting the currents given in Note 3 into W_ with L_ = GND. R
W
_ =
(V
W
_ - V
H
_) / I
W
_.
Note 5: Device draws higher supply current when digital inputs are driven with voltages between (V
DD
- 0.5V) and (GND + 0.5V).
(See Supply Current vs. Digital Input Voltage in the Typical Operating Characteristics.)
Note 6: Wiper-Settling Time is the worst case 0% to 50% rise-time measured between consecutive wiper positions. H_ = V
DD
, L_ =
GND, and the wiper terminal is unloaded and measured with a 10pF oscilloscope probe (see Tap-To-Tap Switching
Transient in the Typical Operating Characteristics).
Note 7: Digital timing is guaranteed by design.
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= +2.7V to +5.5V, V
H
= V
DD
, V
L
= 0; T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V
DD
= +5V, T
A
= +25°C,
unless otherwise noted.)
PARAMETER SYM B O L CONDITIONS MIN TYP MAX UNITS
DIGITAL INPUTS (Note 5)
Input High Voltage V
IH
0.7 x V
DD
V
Input Low Voltage V
IL
0.3 x V
DD
V
Input Leakage Current ±1.0 µA
Input Capacitance 5pF
TIMING CHARACTERISTICS (Analog)
MAX5451 0.5
MAX5453 1.2
Wiper-Settling Time
(Note 6)
t
IW
MAX5455 1.8
µs
TIMING CHARACTERISTICS (Digital, Note 7, Figure 1)
Maximum INC Frequency f
MAX
7 MHz
CS to INC Setup Time t
CI
25 ns
CS to INC Hold Time t
IC
0ns
INC Low Period t
IL
25 ns
INC High Period t
IH
25 ns
U/D to INC Setup t
DI
50 ns
U/D to INC Hold t
ID
0ns
POWER SUPPLIES
Supply Voltage V
DD
2.7 5.5 V
V
DD
= +5V 0.7 2
Supply Current I
DD
CS = INC = U/D = V
DD
or GND
V
D D
= + 2.7V 0.1
µA
P1-P3P4-P6P7-P9P10-P12

MAX5451EUD+T

Mfr. #:
Buy MAX5451EUD+T
Manufacturer:
Maxim Integrated
Description:
Digital Potentiometer ICs Dual 256-Tap Up/Down Interface
Lifecycle:
New from this manufacturer.
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