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DS4026S+YCN

P1-P3P4-P6P7-P9P10-P12P13-P14
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.
Applications
Reference Clock Generation Wireless
Telecom/Datacom/SATCOM Test and Measurement
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
10MHz to 51.84MHz TCXO
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
GNDA
V
CCD
FOUT
GNDD
SCL
SDA
GND
N.C.
N.C.
TOP VIEW
V
REF
V
CC
N.C.
V
OSC
GNDOSC
N.C.
N.C.
DS4026
+
Pin Configuration
Rev 2; 4/08
________________________________________________________________
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.
+
Denotes a lead(Pb)-free/RoHS-compliant package.
*The top mark will include a “+” for a lead(Pb)-free/RoHS-compliant device.
Ordering Information continued at end of data sheet.
Ordering Information
PART TEMP RANGE
OUTPUT (f
C
)
(MHz, CMOS)
PIN-PACKAGE TOP MARK*
DS4026S+ACC
0°C to +70°C 10.00 16 SO DS4026-ACC
DS4026S+ACN
-40°C to +85°C 10.00 16 SO DS4026-ACN
DS4026S+BCC
0°C to +70°C 12.80 16 SO DS4026-BCC
DS4026S+BCN -40°C to +85°C 12.80 16 SO DS4026-BCN
DS4026S+ECC 0°C to +70°C 16.80 16 SO DS4026-ECC
DS4026S+ECN -40°C to +85°C 16.80 16 SO DS4026-ECN
DS4026S+FCC 0°C to +70°C 16.384 16 SO DS4026-FCC
DS4026S+FCN -40°C to +85°C 16.384 16 SO DS4026-FCN
DS4026
10MHz to 51.84MHz TCXO
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
RECOMMENDED DC OPERATING CONDITIONS
(T
A
= -40°C to +85°C, unless otherwise noted.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Voltage Range on V
CC
,
V
CCD
, and V
OSC
Relative to Ground..............................................-0.3V to +3.8V
Voltage Range on SDA, SCL, and FOUT
Relative to Ground...................................-0.3V to (V
CC
+ 0.3V)
Operating Temperature Range (noncondensing)....-40°C to +85°C
Storage Temperature Range ...............................-40°C to +85°C
Soldering Temperature...........................Refer to the IPC/JEDEC
J-STD-020 Specification.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Power-Supply Voltage V
CC
3.135 3.3 3.465 V
Oscillator Power Supply V
OSC
3.135 3.3 3.465 V
Driver Power Supply V
CCD
3.135 3.3 3.465 V
DC ELECTRICAL CHARACTERISTICS
(V
CC
= 3.135V to 3.465V, T
A
= -40°C to +85°C, unless otherwise noted.) (Notes 1, 2, 3)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
V
CC
Active-Supply Current I
CC
(Note 4) 1.5 2.5 mA
FOUT CMOS output on, CL = 10pF,
frequency < 25MHz
3 4
V
OSC
Oscillator Active-Supply
Current
I
OSC
FOUT CMOS output on, CL = 10pF,
frequency 25MHz
5 9
mA
FOUT CMOS output on, CL = 10pF,
frequency < 25MHz
2 3
V
CCD
Driver Active-Supply
Current
I
CCD
FOUT CMOS output on, CL = 10pF,
frequency 25MHz
3 5
mA
SCL Input Leakage I
LI
-1 +1 μA
SDA Leakage I
LO
Output off -1 +1 μA
SCL, SDA High Input Voltage V
IH
0.7 x
V
CC
V
CC
+ 0.3
V
SCL, SDA Low Input Voltage V
IL
-0.3
+0.3 x
V
CC
V
SDA Logic 0 Output I
OL
V
CC
= 3.0V, V
OL
= 0.4V 3 mA
FOUT High Output Voltage V
OH
V
CCD
= 3V, I
OH
= -2mA 2.4 V
FOUT Low Output Voltage V
OL
V
CCD
= 3V, I
OL
= 2.0mA 0.4 V
FOUT Rise/Fall Time t
R
/t
F
(0.1 x V
CCD
) - (0.9 x V
CCD
) 2 ns
FOUT Duty Cycle t
D
0.5 x V
CCD
(Note 5) 45 55 %
DS4026
10MHz to 51.84MHz TCXO
_______________________________________________________________________________________ 3
AC ELECTRICAL CHARACTERISTICS—TCXO
(V
CC
= 3.135V to 3.465V, T
A
= -40°C to +85°C, unless otherwise noted.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Frequency Stability vs.
Temperature
f/f
C
CL = 10pF to ground
f
C
– 1ppm
f
C
f
C
+ 1ppm
ppm
Frequency Stability vs. Voltage
f
VOLTAGE
/f
C
CL = 10pF to ground, +25°C -2 +2 ppm/V
First Year -1 +1
Aging
Years 2–20
f
AGING
/f
C
(Note 5)
-2 +2
ppm
Except 10MHz ±8 ±15
Frequency Pull
Range
10MHz
f/f
C
FTUNEH = 3Fh and FTUNEL = FFh;
FTUNEH = 40h and FTUNEL = 00h at +25°C
±5 ±10
ppm
Frequency Pull Resolution f
RES
/f
C
1 ppb
AC ELECTRICAL CHARACTERISTICS—STRATUM 3
(V
CC
= +3.135V to +3.465V, T
A
= -40°C to +85°C, unless otherwise noted.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
STRATUM 3 FREQUENCY STABILITY
Frequency Stability vs.
Temperature
f
TEMP
/f
C
-40°C to +85°C (Note 6) -0.28 +0.28 ppm
Initial Tolerance and Reflow f
INITIAL
/f
C
T
A
= +25°C, ±3°C and V
DD
= 3.3V -0.8 +0.8 ppm
Frequency Stability vs. Voltage
f
VOLTAGE
/f
C
V
CC
= 3.3V ±5%, C
L
= 10pF to ground,
+25°C (Note 7)
-0.33 +0.33 ppm
Frequency Stability vs.
Aging/20 Years
f
AGING
/f
C
f
C
= Nominal (Note 8) -3.0 +3.0 ppm
Frequency Stability vs. Load
Change
f
LOAD
/f
C
Load = 10pF ±5%, +25°C (Note 5) -0.1 +0.1 ppm
Free-Run Accuracy
Operating temperature, load, supply, and
initial tolerance, aging (20 years) (Notes 5, 8)
-4.6 +4.6 ppm
Holdover Stability (24 Hours)
f
24HOURS
/f
C
24-hour elapsed time (Notes 5, 9) -0.32 +0.32 ppm
PHASE NOISE
PHASE NOISE (dBc/Hz) (TYPICAL, +25°C, 3.3V)
OFFSET (MHz) 10Hz 100Hz 1kHz 10kHz 100kHz 1MHz
12.80 -88.41 -130.16 -147.84 -150.84 -151.71 -151.87
19.44 -82.63 -125.12 -145.03 -146.87 -151.69 -151.52
20.00 -83.71 -120.76 -145.44 -150.96 -151.18 -151.45
38.88 -79.01 -120.06 -141.75 -150.59 -152.50 -153.06
40.00 -80.80 -115.44 -141.17 -151.59 -152.37 -153.00
51.84 -74.09 -120.39 -142.33 -151.14 -153.21 -153.94
10.0 -92.52 -134.83 -147.22 -150.84 -151.25 -150.84
16.384 -87.44 -128.53 -147.67 -150.78 -152.72 -151.75
16.8 -89.6 -126.20 -146.88 -151.90 -152.28 -151.93
CARRIER
FREQUENCY
24.0 -83.98 -119.45 -143.08 -150.33 -150.34 -150.67
P1-P3P4-P6P7-P9P10-P12P13-P14

DS4026S+YCN

Mfr. #:
Buy DS4026S+YCN
Manufacturer:
Maxim Integrated
Description:
TCXO Oscillators 19.6608MHz TCXO
Lifecycle:
New from this manufacturer.
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