MAX5451 MAXIM [Maxim Integrated Products], MAX5451 Datasheet

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MAX5451

Manufacturer Part Number
MAX5451
Description
Dual, 256-Tap, Up/Down Interface, Digital Potentiometers
Manufacturer
MAXIM [Maxim Integrated Products]
Datasheet

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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).
19-1997; Rev 0; 4/01
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.
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
________________________________________________________________ Maxim Integrated Products
General Description
Dual, 256-Tap, Up/Down Interface,
Applications
o Small-Footprint Packages
o 256-Tap Positions
o Independent Up/Down Potentiometer Controls
o Ultra-Low 0.1µA Supply Current
o +2.7V to +5.5V Single-Supply Operation
o Low 35ppm/°C End-to-End Temperature
o Power-On Reset Sets Wiper to Midscale
o Glitchless Switching Between the Resistor Taps
o 10kΩ, 50kΩ, 100kΩ Resistance Values
Digital Potentiometers
MAX5450EUB
MAX5451EUD
MAX5452EUB
MAX5453EUD
MAX5454EUB
MAX5455EUD
(MAX5451/MAX5453/MAX5455)
Coefficient
(Position 127)
TOP VIEW
CS1
U/D
V
W1
DD
L1
10-Pin µMAX (MAX5450/MAX5452/MAX5454)
14-Pin TSSOP (MAX5451/MAX5453/MAX5455)
PART
1
2
3
4
5
MAX5450
MAX5452
MAX5454
µMAX
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
10
9
8
7
6
Ordering Information
CS2
INC
GND
W2
L2
Pin Configurations
U/D1
U/D2
CS1
V
W1
H1
DD
L1
1
4
5
6
7
2
3
10 µMAX
14 TSSOP
10 µMAX
14 TSSOP
10 µMAX
14 TSSOP
PACKAGE
MAX5451
MAX5453
MAX5455
PIN-
TSSOP
Features
14
13
12
11
10
9
8
R (kΩ)
100
100
10
10
50
50
CS2
INC1
INC2
GND
W2
H2
L2
1

Related parts for MAX5451

MAX5451 Summary of contents

Page 1

... 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. ...

Page 2

... unless otherwise noted.) PARAMETER SYM PERFORMANCE (Voltage-Divider Mode, MAX5451/MAX5453/MAX5455 Only) Resolution Integral Nonlinearity (Notes 1 and 2) Differential Nonlinearity DNL (Notes 1 and 2) End-to-End Resistor Tempco Ratiometric Resistor Tempco Full-Scale Error Zero-Scale Error DC PERFORMANCE (Variable Resistor Mode) ...

Page 3

... Note 3: The DNL and INL are measured with the potentiometer configured as a variable resistor. For the 3-terminal potentiometers (MAX5451/MAX5453/MAX5455 unconnected and L_ = GND. For the 2-terminal potentiometers (MAX5450/MAX5452/MAX5454 GND 10kΩ configuration, 80µA for the 50kΩ configuration, and 40µA for the 100kΩ configuration 200µ ...

Page 4

... WIPER POSITION (50kΩ 128 160 192 224 256 WIPER POSITION VARIABLE RESISTOR INL vs. WIPER POSITION (MAX5451) 0.50 0.40 0.30 0.20 0.10 0.00 -0.10 -0.20 -0. 128 160 192 224 256 WIPER POSITION WIPER RESISTANCE vs. WIPER VOLTAGE (100kΩ) 400 380 ...

Page 5

Dual, 256-Tap, Up/Down Interface +5V +25°C, unless otherwise noted VARIABLE RESISTOR INL vs. WIPER POSITION (MAX5453) 0.04 0.02 0.00 -0.02 -0.04 -0.06 -0.08 -0.10 -0.12 -0.14 -0. 128 160 ...

Page 6

... DIGITAL INPUT VOLTAGE (V) TAP-TO-TAP SWITCHING TRANSIENT 10kΩ 50kΩ W 10mV/div 100kΩ INC_ 5V/div SUPPLY CURRENT vs. TEMPERATURE 1 +5V DD 0.8 0.6 0 +3V DD 0.2 0 -40 -30 -20 - TEMPERATURE (°C) MAX5450/5 toc23 MAX5455 MAX5453 MAX5451 1µs/div ...

Page 7

... Dual, 256-Tap, Up/Down Interface, PIN MAX5451 MAX5450 MAX5453 MAX5452 MAX5455 MAX5454 1 1 — — 3 — — — — — 13 — _______________________________________________________________________________________ Digital Potentiometers NAME Chip-Select Input of Resistor 1. Drive low to change wiper position W1 CS1 through INC and U/D ...

Page 8

... Figure 6a shows the MAX5450/MAX5452/MAX5454 variable resistor in series with a resistor to ground to form the adjustable gain control. Figure 6b shows the MAX5451/MAX5453/ MAX5455 as a 3-terminal potentiometer. In these appli- cations the low 5ppm/°C ratiometric tempco allows for a very stable adjustable gain over temperature. ...

Page 9

... POSITION INC1 COUNTER DECODER U/ MAX5451 POWER-ON RESET MAX5453 GND MAX5455 CS2 UP/DOWN POSITION INC2 COUNTER DECODER U/D2 Figure 4. MAX5451/MAX5453/MAX5455 Simplified Functional Diagram _______________________________________________________________________________________ Digital Potentiometers CS1 UP/DOWN INC COUNTER U POWER-ON RESET GND CS2 UP/DOWN W COUNTER Figure 3. MAX5450/MAX5452/MAX5454 Simplified Functional Diagram ...

Page 10

... Digital Potentiometers MAX4493 MAX5450 MAX5452 MAX5454 L Figure 6a. Variable Resistor Adjustable-Gain Amplifier MAX4493 MAX5451 MAX5453 MAX5455 Figure 6b. Potentiometer Adjustable-Gain Amplifier 10 ______________________________________________________________________________________ OUT 1 OUT 2 V OUT W 1 MAX8866 SET1 SHDN1 SHDN2 SET2 GND Figure 7. Adjustable Dual Linear Regulator ...

Page 11

Dual, 256-Tap, Up/Down Interface, ______________________________________________________________________________________ Digital Potentiometers Package Information 11 ...

Page 12

Dual, 256-Tap, Up/Down Interface, Digital Potentiometers Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications ...

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