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DS4026_0709

Description
10MHz to 51.84MHz TCXO
File Size229KB,14 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
Download Datasheet View All

DS4026_0709 Overview

10MHz to 51.84MHz TCXO

Rev 2; 4/08
10MHz to 51.84MHz TCXO
General Description
The DS4026 is a temperature-compensated crystal
oscillator (TCXO) that provides ±1ppm frequency stabili-
ty over the -40°C to +85°C industrial temperature range.
The DS4026 is also available in Stratum 3 versions (see
the
Ordering Information—Stratum 3
table). Each device
is factory calibrated over temperature to achieve the
±1ppm frequency stability. Standard frequencies for the
device include 10, 12.8, 19.44, 20, 38.88, 40, and
51.84MHz. Contact the factory for custom frequencies.
The DS4026 provides excellent phase-noise characteris-
tics. The output is a push-pull CMOS square wave with
symmetrical rise and fall times. In addition, the DS4026
is designed to provide a maximum frequency deviation
of less than ±4.6ppm over 20 years. The device also
provides an I
2
C interface to allow pushing and pulling
of the output frequency by a minimum of ±8ppm
(±5ppm for 10MHz) with typical 1ppb resolution.
The DS4026 implements a temperature-to-voltage con-
version with a nonlinear relationship. The output from
the temperature-to-voltage converter is used to drive
the voltage-controlled crystal oscillator to compensate
for frequency change.
The device implements an on-chip temperature sensor
lookup table, and a digital-to-analog converter (DAC) to
adjust the frequency. An I
2
C interface used to commu-
nicate with the DS4026 performs temperature readings
and frequency push-pull.
Features
±1ppm Frequency Accuracy Over -40°C to +85°C
Standard Frequencies: 10, 12.8, 19.44, 20, 38.88,
40, 51.84MHz
Stratum 3 Frequencies: 10, 12.8, 19.2, 20MHz
Maximum ±4.6ppm Deviation Over 20 Years
Minimum ±8ppm (±5ppm for 10MHz) Digital
Frequency Tuning Through I
2
C Interface
Surface-Mount 16-Pin SO Package
Pb Free/RoHS Compliant
DS4026
Pin Configuration
TOP VIEW
+
GNDA 1
V
REF
2
V
CC
3
V
OSC
4
GNDOSC 5
N.C. 6
N.C. 7
N.C. 8
16 V
CCD
15 FOUT
14 GNDD
13 SCL
DS4026
12 SDA
11 GND
10 N.C.
9
N.C.
Applications
Reference Clock Generation
Telecom/Datacom/SATCOM
Wireless
Test and Measurement
Ordering Information
PART
DS4026S+ACC
DS4026S+ACN
DS4026S+BCC
DS4026S+BCN
DS4026S+ECC
DS4026S+ECN
DS4026S+FCC
DS4026S+FCN
TEMP RANGE
0°C to +70°C
-40°C to +85°C
0°C to +70°C
-40°C to +85°C
0°C to +70°C
-40°C to +85°C
0°C to +70°C
-40°C to +85°C
OUTPUT (f
C
)
(MHz, CMOS)
10.00
10.00
12.80
12.80
16.80
16.80
16.384
16.384
PIN-PACKAGE
16 SO
16 SO
16 SO
16 SO
16 SO
16 SO
16 SO
16 SO
TOP MARK*
DS4026-ACC
DS4026-ACN
DS4026-BCC
DS4026-BCN
DS4026-ECC
DS4026-ECN
DS4026-FCC
DS4026-FCN
Ordering Information continued at end of data sheet.
+Denotes
a lead(Pb)-free/RoHS-compliant package.
*The top mark will include a “+” for a lead(Pb)-free/RoHS-compliant device.
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
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