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PDF MAX5423 Data sheet ( Hoja de datos )
| Número de pieza | MAX5423 | |
| Descripción | (MAX5422 - MAX5424) Digital Potentiometers | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MAX5423 (archivo pdf) en la parte inferior de esta página. Total 11 Páginas | ||
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www.DataSheet.co.kr
19-3371; Rev 0; 7/04
256-Tap, Nonvolatile, SPI-Interface,
Digital Potentiometers
General Description
The MAX5422/MAX5423/MAX5424 nonvolatile, linear-
taper, digital potentiometers perform the function of a
mechanical potentiometer, but replace the mechanics
with a simple 3-wire SPI™-compatible digital interface.
Each device performs the same function as a discrete
potentiometer or variable resistor and has 256 tap points.
The devices feature an internal, nonvolatile EEPROM
used to store the wiper position for initialization during
power-up. The 3-wire SPI-compatible serial interface
allows communication at data rates up to 5MHz, mini-
mizing board space and reducing interconnection com-
plexity in many applications.
The MAX5422/MAX5423/MAX5424 provide three nomi-
nal resistance values: 50kΩ (MAX5422), 100kΩ
(MAX5423), or 200kΩ (MAX5424). The nominal resistor
temperature coefficient is 35ppm/°C end-to-end and
only 5ppm/°C ratiometric. This makes the devices ideal
for applications requiring a low-temperature-coefficient
variable resistor, such as low-drift, programmable gain-
amplifier circuit configurations.
The MAX5422/MAX5423/MAX5424 are available in a
3mm x 3mm 8-pin TDFN package, and are specified
over the extended -40°C to +85°C temperature range.
Applications
Mechanical Potentiometer Replacement
Low-Drift Programmable Gain Amplifiers
Audio Volume Control
Liquid-Crystal Display (LCD) Contrast Control
Low-Drift Programmable Filters
Functional Diagram
8-BIT 8
VDD SHIFT
REGISTER
GND
8-BIT 8
LATCH
256- 256
POSITION
DECODER
CS
SCLK
DIN
SPI
INTERFACE
POR
8-BIT
NV
MEMORY
MAX5422
MAX5423
MAX5424
H
W
L
Features
o Wiper Position Stored in Nonvolatile Memory
(EEPROM) and Recalled Upon Power-Up or
Interface Command
o 3mm x 3mm x 0.8mm TDFN Package
o 35ppm/°C End-to-End Resistance Temperature
Coefficient
o 5ppm/°C Ratiometric Temperature Coefficient
o 50kΩ, 100kΩ, and 200kΩ Resistor Values
o 5MHz SPI-Compatible Serial Interface
o 500nA (typ) Static Supply Current
o Single-Supply Operation: +2.7V to +5.25V
o 256 Tap Positions
o ±0.5 LSB DNL in Voltage-Divider Mode
o ±0.5 LSB INL in Voltage-Divider Mode
SPI is a trademark of Motorola, Inc.
TOP VIEW
Pin Configuration
VDD 1
SCLK 2
DIN 3
CS 4
MAX5422
MAX5423
MAX5424
8H
7W
6L
5 GND
TDFN (3mm x 3mm)
Ordering Information/Selector Guide
PART
MAX5422ETA
MAX5423ETA
MAX5424ETA
*EP = Exposed pad.
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
END-TO-END
RESISTANCE (kΩ)
50
100
200
PIN-PACKAGE
8 TDFN-EP*
8 TDFN-EP*
8 TDFN-EP*
TOP MARK
AIJ
AII
AIH
________________________________________________________________ Maxim Integrated Products 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.
Datasheet pdf - http://www.DataSheet4U.net/
1 page  
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256-Tap, Nonvolatile, SPI-Interface,
Digital Potentiometers
Typical Operating Characteristics (continued)
(VDD = 5.0V, TA = +25°C, unless otherwise noted.)
WIPER TRANSIENT AT POWER-ON
MAX5422 toc04
VDD
1V/div
4µs/div
CL = 10pF
TAP = 128
H = VDD
W
1V/div
1.0
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0
-40
END-TO-END RESISTANCE %
CHANGE vs. TEMPERATURE
-15 10 35 60
TEMPERATURE (°C)
MAXIMUM WIPER RESISTANCE
vs. TEMPERATURE
700
600
STANDBY SUPPLY CURRENT
vs. TEMPERATURE
1.0
0.9
0.8
0.7
0.6
VDD = 5.25V
0.5
0.4 VDD = 4.0V
0.3
0.2 VDD = 3.0V
0.1
VDD = 2.7V
0
85 -40 -15 10 35 60 85
TEMPERATURE (°C)
SUPPLY CURRENT
vs. DIGITAL INPUT VOLTAGE
600
VDD = 2.7V
500
400 VDD = 3.0V
300 VDD = 4.5V
200 VDD = 5.25V
100
0
-40
-15 10 35 60
TEMPERATURE (°C)
THD+N RESPONSE
100
1:1 RATIO
10 20Hz TO 20kHz BANDPASS
1
0.1
0.01
0.001
0.0001
10
100 1k 10k
FREQUENCY (Hz)
85
100k
500
400
300
200
100
0
0 12 34
DIGITAL INPUT VOLTAGE (V)
INL vs. TAP POSITION
(MAX5422)
2.0
VARIABLE-RESISTOR MODE
1.5 VDD = 2.7V
ISRC = 50µA
1.0
5
0.5
0
-0.5
-1.0
0
32 64 96 128 160 192 224 256
TAP POSITION
_______________________________________________________________________________________ 5
Da
5 Page 
www.DataSheet.co.kr
256-Tap, Nonvolatile, SPI-Interface,
Digital Potentiometers
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages.)
PIN 1
INDEX
AREA
D
N
E E2
DETAIL A
CL
L
A
e
CL
L
e
NUMBER OF LEADS SHOWN ARE FOR REFERENCE ONLY
PACKAGE OUTLINE, 6, 8, 10 & 14L,
TDFN, EXPOSED PAD, 3x3x0.80 mm
21-0137
F
1
2
COMMON DIMENSIONS
SYMBOL
A
D
MIN.
0.70
2.90
MAX.
0.80
3.10
E 2.90 3.10
A1 0.00 0.05
L 0.20 0.40
k 0.25 MIN.
A2 0.20 REF.
PACKAGE VARIATIONS
PKG. CODE
N
D2
T633-1
6 1.50±0.10
T833-1
8 1.50±0.10
T1033-1
10 1.50±0.10
T1433-1
14 1.70±0.10
T1433-2
14 1.70±0.10
E2
2.30±0.10
2.30±0.10
2.30±0.10
2.30±0.10
2.30±0.10
e
0.95 BSC
0.65 BSC
0.50 BSC
0.40 BSC
0.40 BSC
JEDEC SPEC
MO229 / WEEA
MO229 / WEEC
MO229 / WEED-3
----
----
b
0.40±0.05
0.30±0.05
0.25±0.05
0.20±0.03
0.20±0.03
[(N/2)-1] x e
1.90 REF
1.95 REF
2.00 REF
2.40 REF
2.40 REF
PACKAGE OUTLINE, 6, 8, 10 & 14L,
TDFN, EXPOSED PAD, 3x3x0.80 mm
21-0137
F
2
2
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 ____________________ 11
© 2004 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
Datasheet pdf - http://www.DataSheet4U.net/
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet MAX5423.PDF ] | |
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