MAX1474AXT+T Maxim Integrated Products, MAX1474AXT+T Datasheet

IC CAP ELEC TRIM SC70-6

MAX1474AXT+T

Manufacturer Part Number
MAX1474AXT+T
Description
IC CAP ELEC TRIM SC70-6
Manufacturer
Maxim Integrated Products
Type
Electronically Trimmable Capacitorr
Datasheet

Specifications of MAX1474AXT+T

Applications
Keyless Entery, Home Automation, Wireless Audio/Video
Mounting Type
Surface Mount
Package / Case
SC-70-6, SC-88, SOT-363
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
MAX1474AXT+T
MAX1474AXT+TTR
The MAX1474 is a fine-line (geometry) electronically trim-
mable capacitor (FLECAP) programmable through a
simple digital interface. There are 32 programmable
capacitance values ranging from 6.4pF to 13.3pF in
0.22pF increments (Table 1). The quartz dielectric
capacitance is highly stable and exhibits a very low volt-
age coefficient. It has virtually no dielectric absorption
and has a very low temperature drift coefficient
(<33ppm/°C). The MAX1474 is programmed through two
digital interface pins, which have Schmidt triggers and
pulldown resistors to secure capacitance programming.
Maxim can customize the MAX1474 for specific high-
volume applications. Contact Maxim for further informa-
tion.
19-1948; Rev 1; 3/01
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.
TOP VIEW
Miniature Electronically Trimmable Capacitor
Post-Trim of Low-Cost Regenerative Receivers
Tunable RF Stages
Low-Cost, Low-Temperature Drift Oscillators
Garage Door Openers
Keyless Entry
Industrial Wireless Control
Capacitive Sensor Trimming
RFID Tags
V
________________________________________________________________ Maxim Integrated Products
CP
EN
DD
1
2
3
General Description
MAX1474
SC70
Pin Configuration
Customization
Applications
6
5
4
CM
V
DAT
SS
o Tiny SC70 Package (1.1mm x 2.2mm x 2.4mm)
o High-Performance Electronically Trimmable
o Very Simple Digital Interface
o Eliminates the Need for Mechanical Tuning
o Enabling Technology for Low-Cost Production
o Fully Static Operation After Programming
V
MAX1474AXT-T
CP
Capacitance
Line Automation
(No Switching)
DD
EN
PART
6pF
-40°C to +125°C 6 SC70-6
TEMP. RANGE
Ordering Information
LOGIC INTERFACE
Functional Diagram
0.2pF
0.4pF
0.8pF
1.6pF
3.2pF
PIN-
PACKAGE
Features
6pF
MARK
TOP
AAT
CM
DAT
V
SS
1

Related parts for MAX1474AXT+T

MAX1474AXT+T Summary of contents

Page 1

... SC70 ________________________________________________________________ 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. o Tiny SC70 Package (1.1mm x 2.2mm x 2.4mm) o High-Performance Electronically Trimmable Capacitance o Very Simple Digital Interface o Eliminates the Need for Mechanical Tuning ...

Page 2

Miniature Electronically Trimmable Capacitor ABSOLUTE MAXIMUM RATINGS Supply Voltage ..................................... -0. All Other Pins ...................................(V SS RMS Current into Any Pin....................................................50mA Continuous Power Dissipation (T = +70°C) A 6-Pin SC70 (derate 3.1mW/°C above ...

Page 3

Miniature Electronically Trimmable Capacitor (V = +5V +25°C, unless otherwise noted CAPACITANCE vs. TEMPERATURE 11.00 DAT = 31 PULSES 10.99 10.98 10.97 10.96 10.95 10.94 10.93 10.92 10.91 10.90 -40 -15 10 ...

Page 4

Miniature Electronically Trimmable Capacitor (V = +5V +25°C, unless otherwise noted SMITH CHART: 15 DAT PULSES 962MHz 1 PIN NAME 1 CP Capacitor Pin Connected to High-Impedance Node. ...

Page 5

Miniature Electronically Trimmable Capacitor While EN is asserted, the internal counter counts posi- tive edges of DAT. The number of sequential pulses on DAT determines the capacitance setting de- asserted, the counter value is latched into the ...

Page 6

Miniature Electronically Trimmable Capacitor EN DAT t SETUP t RESET Figure 1. Digital Timing Diagram 9.6pF 35pF Figure 2. Q Enhancement Circuit 6 _______________________________________________________________________________________ Test Circuits/Timing Diagrams COUNT t DAT_HIGH 0.01µF 2MΩ 12pF V GEN ...

Page 7

Miniature Electronically Trimmable Capacitor CAPACITANCE METER 0.01µF 2MΩ GEN1 MAX1474 GEN1 GEN2 DD EN DAT Figure 3b. Capacitance vs. Voltage (Differential MAX1474 Figure 4. Electronic ...

Page 8

... 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. 8 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2001 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products ...

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