MAX5402EUA+T Maxim Integrated Products, MAX5402EUA+T Datasheet

IC POT DGTL 256-TAP 8-UMAX

MAX5402EUA+T

Manufacturer Part Number
MAX5402EUA+T
Description
IC POT DGTL 256-TAP 8-UMAX
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX5402EUA+T

Taps
256
Resistance (ohms)
10K
Number Of Circuits
1
Temperature Coefficient
35 ppm/°C Typical
Memory Type
Volatile
Interface
3-Wire Serial
Voltage - Supply
2.7 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
Resistance In Ohms
10K
Number Of Pots
Single
Taps Per Pot
256
Resistance
10 KOhms
Wiper Memory
Volatile
Digital Interface
Serial (3-Wire, SPI)
Operating Supply Voltage
5 V
Supply Current
0.0008 mA (Typ)
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Description/function
256-Tap æPoT, Low-Drift, Digital Potentiometer
Mounting Style
SMD/SMT
Supply Voltage (max)
5.5 V
Supply Voltage (min)
2.7 V
Tolerance
25 %
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX5402 µPoT
variable resistor with 10kΩ total resistance in a tiny 8-
pin µMAX package. This device functions as a mechan-
ical potentiometer, consisting of a fixed resistor string
with a digitally controlled wiper contact. It operates
from +2.7V to +5.5V single-supply voltages and uses
an ultra-low 0.1µA supply current. This device also pro-
vides glitchless switching between resistor taps, as well
as a convenient power-on reset (POR) that sets the
wiper to the midscale position at power-up. A low
5ppm/°C ratiometric temperature coefficient makes it
ideal for applications requiring low drift.
The MAX5402 serves well in applications requiring digi-
tally controlled resistors, including adjustable voltage
references and programmable gain amplifiers (PGAs).
A nominal end-to-end resistor temperature coefficient of
35ppm/°C makes this part suitable for use as a variable
resistor in applications such as low-tempco adjustable
gain and other circuit configurations. This device is
guaranteed over the extended industrial temperature
range (-40°C to +85°C).
19-1896; Rev 0; 1/01
________________________Applications
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.
SCLK
DIN
CS
Mechanical Potentiometer Replacement
Low-Drift PGAs
Adjustable Voltage References
REGISTER
CLOCK
LOGIC
SHIFT
8-BIT
R
________________________________________________________________ Maxim Integrated Products
8
digital potentiometer is a 256-tap
General Description
LATCH
Functional Diagram
8-BIT
R
GND
V
DD
POR
8
DECODE
MAX5402
256
H
W
L
256-Tap, µPoT, Low-Drift,
o Small Footprint, 8-Pin µMAX Package
o Ultra-Low 100nA Supply Current
o +2.7V to +5.5V Single-Supply Operation
o 256 Tap Positions
o Low Ratiometric Temperature Coefficient
o Low End-to-End Resistor Temperature Coefficient
o Power-On Reset: Wiper Goes to Midscale
o Glitchless Switching Between the Resistor Taps
o 3-Wire SPI™-Interface Compatible
o 10kΩ Resistor Value
µPoT is a trademark of Maxim Integrated Products.
SPI is a trademark of Motorola, Inc.
MAX5402EUA
(Position 128)
Digital Potentiometer
TOP VIEW
5ppm/°C
35ppm/°C
PART
GND
DIN
CS
L
-40°C to +85°C
1
2
4
3
Ordering Information
RANGE
TEMP.
MAX5402
µMAX
Pin Configuration
PIN-
PACKAGE
8 µMAX
7
6
5
8
H
V
W
SCLK
DD
Features
R (kΩ)
10
1

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MAX5402EUA+T Summary of contents

Page 1

... Power-On Reset: Wiper Goes to Midscale (Position 128) o Glitchless Switching Between the Resistor Taps o 3-Wire SPI™-Interface Compatible o 10kΩ Resistor Value PART MAX5402EUA µPoT is a trademark of Maxim Integrated Products. SPI is a trademark of Motorola, Inc. TOP VIEW H 256 DECODE W L ...

Page 2

Low-Drift, Digital Potentiometer ABSOLUTE MAXIMUM RATINGS V to GND ..............................................................-0.3V to +6V DD DIN, SCLK GND ............................................-0. GND .............................................-0. Maximum Continuous Current into Pins H, L, and W ...

Page 3

ELECTRICAL CHARACTERISTICS (continued +5V MIN PARAMETER SYMBOL SCLK Pulse Width Low CS Fall to SCLK Rise Setup Time SCLK Rise to CS Rise ...

Page 4

Low-Drift, Digital Potentiometer (T = +25°C, unless otherwise noted.) A WIPER RESISTANCE vs. WIPER VOLTAGE 300 275 250 V = +3V DD 225 200 175 150 125 100 WIPER VOLTAGE (V) RESISTANCE vs. INPUT ...

Page 5

A = +25°C, unless otherwise noted.) VOLTAGE-DIVIDER INL vs. INPUT CODE 0.20 0.15 0.10 0.05 0.00 -0.05 -0.10 -0.15 -0. 128 160 192 224 256 INPUT CODE (DECIMAL) TAP-TO-TAP SWITCHING TRANSIENT V W-L CS 200ns/div ...

Page 6

Low-Drift, Digital Potentiometer CS SCLK 1ST CLOCK PULSE DIN D7 MSB TIME Figure 1. Serial Interface Timing Diagram CS t CSS t CSO SCLK DIN Figure 2. Detailed Serial Interface Timing Diagram Detailed Description ...

Page 7

Data Word B0 (D7) B1 (D6) B2 (D5) (MSB) First Bit In Figure 3. Serial Data Format Applications Information The MAX5402 is intended for a variety of circuits where accurate, fine-tuned adjustable resistance is required, such as in adjustable voltage ...

Page 8

Low-Drift, Digital Potentiometer +5V VIN V O OUT MAX6160 W ADJ GND 1.23V ✕ 255 WHERE C IS THE DECIMAL EQUIVALENT WRITTEN CODE. Figure 6. Adjustable Voltage Reference 8 _______________________________________________________________________________________ TRANSISTOR COUNT: 3475 PROCESS: ...

Page 9

... 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 without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________ 9 © 2001 Maxim Integrated Products 256-Tap, µ ...

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