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CFPT-9025 Series High Performance TCXO/TCVCXO

ISSUE 3; 1 FEBRUARY 2006

Package Outline

■

Recommended for New Designs

Delivery Options

■

Low Profile, 7.6 x 9.3 x 3.2 mm SMD package with High

Temperature Co-fired Ceramic base and metal cover

Please contact our sales office for current leadtimes

Ageing

■

Description

■

±1ppm maximum in first year

±5ppm maximum for 10 years

The CFPT-9025 series of temperature compensated

crystal oscillators provide for ultra high stabilities down

to ±0.3ppm and operating temperature ranges as wide as

–55 to +125°C. The oscillator uses C-MAC’s latest custom

ASIC "Pluto", a single chip oscillator and analogue

compensation circuit. Due to its unique mechanical

construction the CFPT-9025 series is able to withstand

20,000 G’s acceleration, which makes it the TCXO of

choice for gun hardened GPS navigation systems

Frequency Stability

■

Temperature: see table

Typical Supply Voltage Variation ±10% < ±0.2 ppm

Typical Load Coefficient ±10%

< ±0.1 ppm

Frequency Adjustment

■

Standard Frequencies

■

Three options with external Control Voltage applied to

pad 1:

A - Ageing adjustment: > ±5ppm (Standard Option)

B - No frequency adjustment initial calibration @ 25°C

< ±0.5 ppm

SURFACE MOUNT

TCXOs

9.6, 10.0, 11.68, 12.504, 12.8, 13.0, 14.4, 16.3676, 19.44,

20.0, 21.73875, 24.5535, 38.88, 40.96, 47.032, 49.152,

51.84 MHz

Non-standard Frequencies in the range 1.0 MHz to 75.0 MHz

(see table) are available on request, contact sales office.

Output Waveform

■

C - High Pulling ±10ppm to ±50ppm and non-standard

control voltage ranges may be available depending

on frequency and stability options. Please consult

our sales office

■

Square HCMOS 15pF load

Square ACMOS 50pF max. load

Sinewave >1.0pk-pk, 10kΩ // 10pF load

Clipped sinewave >0.81Vpk-pk, 10kΩ // 10pF load

Linearity

Slope

Input resistance

Modulation bandwidth

Standard control voltage ranges:

Without reference voltage

< 1%

Positive

> 100kΩ

> 2kHz

Sinewave and clipped sinewave signals are superimposed

on a DC offset, to remove this offset insert an external

coupling capacitor in series with the output

Supply Voltage

■

- Vs=5.0V Vc=2.5V±2V

- Vs=3.3V Vc=1.65V±1V

- Vc=0V to Vref

With reference voltage

Reference Voltage, Vref

■

3.3 and 5.0V, see table, non-standard supply voltages in

the range 2.4 to 6.0V are available on request, contact

sales office

Current Consumption

■

Optional reference voltage output on pad 2, suitable for

potentiometer supply or DAC reference.

1. No output (Standard option)

2. 2.2V, for Min. Vs>2.4V

3. 2.75V, for Min. Vs>3.0V

4. 4.2V, for Min. Vs>4.5V

Maximum load current 100µA

HCMOS Typically

≈

1+Frequency(MHz)*Supply(V)*{Load(pF)+15}*10

-3

E. g. 20MHz, 5V, 15pF

≈

4mA

ACMOS Typically

≈

1+Frequency(MHz)*Supply(V)*{Load(pF)+23}*10

-3

Sinewave < 8 mA

Clipped Sinewave Typically

≈

1+Frequency(MHz)*1.2*{Load(pF)+30}*10

-3

■

For manual frequency adjustment connect an external

50kΩ potentiometer between pad 2 (Reference Voltage)

and pad 3 (Ground) with wiper connected to pad 1

(Voltage Control). Please specify reference voltage as a

part of the ordering code

Tri-state

■

Outline in mm

Pad 5 open circuit or >0.6Vs output enabled

Pad 5 < 0.2Vs Tri-state

9.3 max

Pad Connections

1. Voltage Control*

2. Vref*

3. GND

4. Output

5. Tri-state Control (Enable)*

6. +Vs

*Leave unconnected if

not required

When Tri-stated, the output stage is disabled for all output

options, but the oscillator and compensation circuit are

still active (Current consumption <1mA)

Storage Temperature Range

■

–55 to 125°C

■

C-MAC

Pin 1 / Static sensitivity identifier (Triangle)

Part Number (E and Four digits)

Device date code / Location (YWL)

0.81 (x6)

±0.15

2.03

±0.15

CMAC YWL

∆

E2795

Environmental Specification

■

SURFACE MOUNT

TCXOs

To be discussed on an individual basis, contact sales

office

5.08

Minimum Order Information Required

■

Output Waveform - HCMOS

90% (VoH-VoL)

+Vs

VoH

Frequency + Model Number + Frequency Stability vs

Operating Temperature Range Code + Reference Voltage

Code + Frequency Adjustment Code

■

Discrete part number for repeat orders

50% (VoH-VoL)

Please supply full information for non-standard options, if

required

1.52 (x5)

±0.15

3.2 max

Marking Includes

7.6 max

10% (VoH-VoL)

VoL

260°C max

Reflow Solder Profile

Temperature

260

220

180

150

120

50k

Ω

Duty cycle = t x 100(%)

Test Circuit

120sec

max

10sec

60sec max

Time

Voltage

Control

100nF

Output

Tri-state

control

360 sec max.

Phase Noise (typical figures)

Frequency

13.0MHz

25.0MHz

50.0MHz

Frequency offset from

carrier: 10Hz

–95 dBc/Hz

–85 dBc/Hz

–75 dBc/Hz

Frequency offset from

carrier: 100Hz

–120 dBc/Hz

–110 dBc/Hz

–100 dBc/Hz

Frequency offset from

carrier: 1kHz

–135 dBc/Hz

–125 dBc/Hz

–120 dBc/Hz

Frequency offset from

carrier: 10kHz

–140 dBc/Hz

–135 dBc/Hz

–130 dBc/Hz

Frequency offset from

carrier: 100kHz

–145 dBc/Hz

–140 dBc/Hz

–135 dBc/Hz

Electrical Specification - limiting values when measured in test circuit

Frequency Range

1.0 to 50.0MHz

Supply Voltage

3.3V±10%

Output Waveform

Square HCMOS

15pF

1.0 to 50.0MHz

5.0V±10%

Square HCMOS

15pF

8.0 to 50.0MHz

1.0 to 75.0MHz

8.0 to 50.0MHz

3.3V±10%

5.0V±10%

3.3V±10%

5.0V±10%

3.3V±10%

5.0V±10%

Sine 10k //10pF

Square ACMOS

15pF

Square ACMOS

15pF

Clipped Sinewave

10k //10pF

Clipped Sinewave

10k //10pF

Output levels

Voh > 90% Vs

Vol < 10% Vs

Voh > 90% Vs

Vol < 10% Vs

Vpk-pk > 1V

Voh > 90% Vs

Vol < 10% Vs

Voh > 90% Vs

Vol < 10% Vs

Vpk-pk > 0.8V

3ns

2ns

—

3ns

2ns

—

45/55%

—

CFPT-9028

CFPT-9029

CFPT-9030

CFPT-9031

CFPT-9032

CFPT-9033

SURFACE MOUNT

TCXOs

Rise Time(tr)

8ns

Fall Time (tf)

8ns

Duty Cycle

45/55%

Model Number

CFPT-9026

7ns

45/55%

CFPT-9027

Frequency Stability Available Over Operating Temperature Ranges

Operating

Temperature

Ranges

0 to 50°C

0 to 70°C

–20 to 70°C

–30 to 75°C

–40 to 85°C

–55 to 95°C

–55 to 125°C

Ordering Example

Frequency

Model number

Frequency Stability Vs Operating Temperature Code

Reference Voltage Code

Frequency Adjustment Code

10.0MHz

CFPT-9026 CS 1 A

Frequency Stabilities Vs Operating Temperature Range

±0.3ppm

Code AP

Code AC

Code AS*

±0.5ppm

Code EP

Code EC

Code ES

Code EU

Code EX*

±1.0ppm

Code FP

Code FC

Code FS

Code FU

Code FX

Code FA*

±1.5ppm

Code CP

Code CC

Code CS

Code CU

Code CX

Code CA

±2.0ppm

Code GP

Code GC

Code GS

Code GU

Code GX

Code GA

Code GZ*

±2.5ppm

Code HP

Code HC

Code HS

Code HU

Code HX

Code HA

Code HZ

(For reference voltage and frequency adjustment codes see main text)

Note:* Codes may not be available for all frequencies; stability of ±3ppm over -40 to 110°C is available as code ‘JY’ (e.g. 44.0MHz CFPT-9030-JY-1B)