MAX5403-MAX5405

Manufacturer Part NumberMAX5403-MAX5405
DescriptionDual 256-Tap, Low-Drift, Digital Potentiometers in 10-?MAX
ManufacturerMAXIM [Maxim Integrated Products]
MAX5403-MAX5405 datasheet
 


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19-1934; Rev 1; 4/01
Digital Potentiometers in 10-µMAX
General Description
The MAX5403/MAX5404/MAX5405 is a family of dual
linear taper digital potentiometers. Each device has one
3-terminal potentiometer and one 2-terminal variable
resistor (Figure 1). The MAX5403/MAX5404/MAX5405
operate from +2.7V to +5.5V single-supply voltages
and use an ultra-low supply current of 0.1µA. These
devices also provide glitchless switching between
resistors taps as well as a convenient power-on reset
(POR) that sets the wiper to the midscale position at
power-up. The 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 per-
forms the same function as a discrete potentiometer or
variable resistor.
These parts are ideal for applications requiring digitally
controlled resistors. Three resistance values are avail-
able: 10kΩ (MAX5403), 50kΩ (MAX5404), and 100kΩ
(MAX5405). A nominal resistor-temperature coefficient
of 35ppm/°C end-to-end and 5ppm/°C ratiometric make
the MAX5403/MAX5404/MAX5405 ideal for applications
requiring low temperature-coefficient variable resistors,
such as adjustable-gain circuit configurations.
The MAX5403/MAX5404/MAX5405 are available in a 10-
pin µMAX package. Each device is guaranteed over the
extended industrial temperature range (-40°C to +85°C).
Mechanical Potentiometer Replacement
Low-Drift Programmable Gain Amplifier (PGA)
Volume Control
LCD Screen Adjustment
Adjustable Voltage Reference
Programmable Filters, Delays, Time Constant
Impedance Matching
SPI is a registered trademark of Motorola, Inc.
________________________________________________________________ Maxim Integrated Products
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.
Dual 256-Tap, Low-Drift,
o 10-Pin µMAX Small Footprint Package
o 256-Tap Positions
o Ultra Low 0.1µA Supply Current
o +2.7V to +5.5V Single-Supply Operation
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
Applications
PART
MAX5403EUB
MAX5404EUB
MAX5405EUB
TOP VIEW
Features
Ordering Information
TEMP RANGE
PIN-PACKAGE
R (kΩ)
-40°C to +85°C
10 µMAX
-40°C to +85°C
10 µMAX
-40°C to +85°C
10 µMAX
Pin Configuration
GND
1
10
L
A
L
2
9
W
B
A
MAX5403
H
3
8
V
B
MAX5404
DD
MAX5405
W
4
7
SCLK
B
CS
5
6
DIN
µMAX
10
50
100
1

MAX5403-MAX5405 Summary of contents

  • Page 1

    ... These parts are ideal for applications requiring digitally controlled resistors. Three resistance values are avail- able: 10kΩ (MAX5403), 50kΩ (MAX5404), and 100kΩ (MAX5405). A nominal resistor-temperature coefficient of 35ppm/°C end-to-end and 5ppm/°C ratiometric make the MAX5403/MAX5404/MAX5405 ideal for applications requiring low temperature-coefficient variable resistors, such as adjustable-gain circuit configurations ...

  • Page 2

    ... MIN MAX CONDITIONS N R MAX5403 MAX5403 MAX5404 MAX5404 MAX5405 MAX5405 N MAX5403 (Pot A) MAX5403 (Pot +5V DD MAX5404 MAX5405 MAX5403 (Pot A) MAX5403 (Pot +3V DD MAX5404 MAX5405 +3V DD MAX5403 W MAX5404/MAX5405 . Typical values are +5V ...

  • Page 3

    ... Note 4: The wiper resistance is the worst value measured by injecting into W Note 5: Digital timing is guaranteed by design. _______________________________________________________________________________________ Dual 256-Tap, Low-Drift MIN MAX CONDITIONS MAX5403 R MAX5404 HL MAX5405 MAX5403 t MAX5404 S MAX5405 CSS t CSH CS0 t CS1 t CSW ...

  • Page 4

    Dual 256-Tap, Low-Drift, Digital Potentiometers in 10-µMAX (V = +5.0V +25°C, unless otherwise noted WIPER RESISTANCE vs. WIPER VOLTAGE (50kΩ) 380 360 340 320 V = +3V DD 300 280 V = +5V DD 260 240 ...

  • Page 5

    Digital Potentiometers in 10-µMAX (V = +5.0V +25°C, unless otherwise noted VARIABLE RESISTOR INL vs. INPUT CODE (50kΩ) 0.04 0.02 0.00 -0.02 -0.04 -0.06 -0.08 -0.10 -0.12 -0.14 -0. 128 160 192 ...

  • Page 6

    ... TEMPERATURE (°C) 6 _______________________________________________________________________________________ Typical Operating Characteristics (continued +5V DD 4.0 4.5 5.0 V W-L 10mV/div 100kΩ CS 5V/div 60 80 SUPPLY CURRENT vs. TEMPERATURE 1 +5V DD 0.8 0.6 0 +3V DD 0.2 0 -40 -30 -20 - TEMPERATURE (°C) TAP-TO-TAP SWITCHING TRANSIENT (CODE 127 TO 128) MAX5403 toc22 200ns/div ...

  • Page 7

    ... V DD GND 9-BIT DIN SHIFT REGISTER SCLK DECODE CS Figure 1. MAX5403/MAX5404/MAX5405 Functional Diagram: 2-Terminal Variable Resistor and 3-Terminal Potentiometers in 10-µMAX Configuration Detailed Description Each potentiometer consists of 255 fixed resistors in series between pins H and L B potentiometer and between W and L A nal variable resistor (Figure 1) ...

  • Page 8

    ... MAX5404/MAX5405 as a 2-terminal variable resistor in series with a resistor to ground to form the adjustable gain control of a noninverting amplifier. Similarly, Figure 6b shows how to use the MAX5403/ MAX5404/MAX5405 as a 3-terminal potentiometer. In this application the MAX5403/MAX5404/MAX5405 low 5ppm/°C ratiometric tempco allows for a very stable adjustable gain-configuration overtemperature ...

  • Page 9

    ... MAX6160 GND Figure 7a. Adjustable Voltage Reference Using: 3-Terminal Potentiometer pin of the MAX5403/MAX5404/MAX5405 is connected to the ADJ pin of the MAX6160. The MAX5403/ MAX5404/MAX5405 allow precise setting of the voltage reference output. A low 5ppm/°C ratiometric tempco pin of the X allows a very stable, adjustable voltage over tempera- ture ...

  • Page 10

    Dual 256-Tap, Low-Drift, Digital Potentiometers in 10-µMAX Chip Information TRANSISTOR COUNT: 8689 PROCESS: BiCMOS 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 ...