VTC4-C54E-12M800中文资料

VTC4 series

Voltage Controlled Temperature Compensated Crystal Oscillator

The VTC4, VCTXCO

Features

? Clipped Sine Wave Output ? Output Frequencies to 27 MHz ? Fundamental Crystal Design ? Optional VCXO Function available ? Gold over nickel contact pads

? Hermetically Sealed Ceramic SMD package

? Product is compliant to RoHS directive and fully compatible with lead free assembly

Applications

? Wireless Communications ? Base Stations

? Point to point radios ? Broadband Access

? Test Equipment ? Handsets

Description

Vectron’s VTC4 Temperature Compensated Crystal Oscillator (TCXO) is a quartz stabilized, clipped sine wave output, temperature

compensated oscillator, operating off either 2.8, 3.0, 3.3 or 5.0 volt supply.

VTC4 Data Sheet

Performance Characteristics

Table 1. Electrical Performance for the Clipped Sine Wave Output Option

Parameter Symbol Min Typical Maximum Units Frequency f O10.000 27.000 MHz Typical Supply Voltage

Ordering option, see last page

2.8V,

3.0V, 3.3V or 5.0V

Supply Current

10.000 MHz to < 15.000 MHz 15.000 MHz to 27.00 MHz I DD

1.5

2.0

mA

Output Level Vp/p 0.8 V Output Load 10K II 10pf

Control Voltage Impedance Z Vc 1 Mohm Control Voltage to reach pull

All options (5.0, 3.3,3.0 and 2.8V)0.5 2.5

V

Pull Range

Ordering option, see last page

TPR ±5, ±8, ±10, ±15 or ±20 ppm

Temperature Stability

Ordering option, see last page.

±0.5 to ±5.0 ppm Initial Accuracy, “No Adjust” option ±0.5 ppm Power Supply Stability ±0.2 ppm Load Stability ±0.2 ppm Aging ±1.0 ppm/year Operating temperature

Ordering option, see last page

0/55, -10/60, -20/70, -30/80, -40/85 °C Phase Noise, 12.800MHz

10 Hz offset 100 Hz offset 1 kHz offset 10 kHz offset 100 kHz offset 5MHz offset -89

-113

-137

-150

-155

-156

dBc/Hz

Start-up time 2 ms 1. A 0.01uF and a 0.1uF capacitor should be located as close to the supply as possible (to ground) is recommended.

VTC4 Data Sheet

Figure 1. Typical Phase Noise Plot

Figure 2. Clipped Sine Wave Output

VTC4 Data Sheet

VCXO Functional Description

VCXO Feature: The VTC4 can be ordered with a VCXO function for applications were it will be used in a PLL, or the output frequency needs fine tune adjustments. This is a high impedance input, 1 Mohm, and can be driven with an op-amp or terminated with adjustable resistors etc. Pin 1 should not be left floating on the VCXO optional devices.

“No Adjust” Feature: In applications were the VTC4 will be not be used in a PLL, or the output frequency does not fine tune adjustments, the best device to use would be a VTC4-x0xxx. By using the “no adjust” option, the circuit is simplified as Vc does not need to adjusted or set to a predetermined voltage and pin 1 should be grounded (pin 1 can be left open but should not be set to a voltage such as the supply). Outline Diagrams, Pad Layout and Pin Out

Table 2. Pinout

Pin # Symbol Function

1 N/C or

V C No Connect (VTC4-x0xx) or VCXO Control Voltage

2 GND Electrical and Case Ground

3 f O Output Frequency

4 V DD Supply Voltage

NOTE: Additional pads are used to program and adjust the TCXO during manufacturing and should be left open; do not terminate these to the supply voltage. Some designs do not include these additional pads.

Contact Pads are gold over nickel

Figure 3, Package drawing

VTC4 Data Sheet

Tape and Reel

Absolute Maximum Ratings

Stresses in excess of the absolute maximum ratings can permanently damage the device. Functional operation is not implied at these or any other conditions in excess of conditions represented in the operational sections of this data sheet. Exposure to absolute maximum ratings for extended periods may adversely affect device reliability.

Table 4. Absolute Maximum Ratings

Parameter Symbol Ratings Unit

Storage Temperature Tstorage -55/125 °C

Reliability

The VTC4 qualification tests have included:

Table 5. Environnemental Compliance

Parameter Conditions

Mechanical Shock MIL-STD-883 Method 2002

Mechanical Vibration MIL-STD-883 Method 2007

Temperature Cycle MIL-STD-883 Method 1010

Solderability MIL-STD-883 Method 2003

Gross and Fine Leak MIL-STD-883 Method 1014

Resistance to Solvents MIL-STD-883 Method 2015

VTC4 Data Sheet

Handling Precautions

Although ESD protection circuitry has been designed into the the VTC4, proper precautions should be taken when handling and mounting. VI employs a Human Body Model and a Charged-Device Model (CDM) for ESD susceptibility testing and design protection evaluation. ESD thresholds are dependent on the circuit parameters used to define the model. Although no industry wide standard has been adopted for the CDM, a standard HBM of resistance = 1.5kohms and capacitance = 100pF is widely used and therefore can be used for comparison purposes.

Table 6. ESD Ratings

Model Minimum Conditions

Human Body Model 1000 MIL-STD-883 Method 3115

Charged Device Model 1500 JESD 22-C101 Suggested IR profile

Devices are built using lead free epoxy and can also be subjected to standard lead free IR reflow conditions, Table 7 shows max temperatures and lower temperatures can also be used e.g. peak temperature of 220C.

Table 7. Reflow Profile (IPC/JEDEC J-STD-020B)

Parameter Symbol Value PreHeat Time t

150 sec Min, 200 sec Max

S

Ramp Up R

3 o C/sec Max

UP

Time Above 217 o C t L60 sec Min, 150 sec Max

Time To Peak Temperature t

480 sec Max

AMB-P

Time At 260 o C (max) t

10 sec Max

P

Time At 240 °C (max) t

60 sec Max

p2

Ramp Down R

6 o C/sec Max

DN

VTC4 Data Sheet

Ordering Information

Table 8. Standard Frequency List 10.000 12.504 12.800 13.000

13.568 14.000 14.31818 14.4844 14.7456 15.000 16.000 16.325291 16.367667 16.396 16.800 17.500 18.414 19.200 19.440 19.680 19.800 20.000 21.250 23.104 24.000 24.5535 25.000

25.600 27.456

TCXO, 5x3.2

Pulling Range

0: Fixed TCXO, no adjust 1: ±5ppm A: ±0.5ppm 2: ±8ppm 1: ±1.0ppm 3: ±10ppm B: ±1.5ppm 4: ±15ppm 2: ±2.0ppm 5: ±20ppm C: ±2.5ppm

3: ±3.0 ppm Note: Not all combinations are available:

D: ±3.5ppm

±0.5 ppm is available over 0/ 55 °C, and on a case by case basis for -10/60C. 4: ±4.0ppm ±1.0 ppm to ±5.0 ppm is available on all temperature ranges

5: ±5.0ppm

https://www.wendangku.net/doc/8417552479.html,

December 29, 2005

USA: Vectron International ? 267 Lowell Road, Hudson, NH 03051 ? Tel: 1-88-VECTRON-1 ? Fax: 1-888-FAX-VECTRON

EUROPE: Landstrasse, D-74924, Neckarbischofsheim, Germany ? Tel: 49 (0) 7268 8010 ? Fax: 49 (0) 7268 801281

ASIA: Vectron Asia Pacific Sales 1F~2F. No.8 Workshop No.308 Fenju Rd., WaiGaoQiao Free Trade Zone, Pudong New Area Shanghai, China 200131 ?Tel: 8621 50480777 ? Fax: 8621 50481881