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5x7mm Surface Mount High Precision TCXO In Stock at Digi-Key
Description
2111 Comprehensive Drive Aurora, Illinois 60505 Phone: 630-851-4722 Fax: 630-851-5040 www.conwin.com US Headquarters 630-851-4722: European Headquarters: +353-61-472221
D7 The Connor-Winfield 's D75AS 5A 20 S 0 8 .0M 4 7 is a 5x7mm Surface Mount Hz Temperature Compensated Crystal Controlled Oscillators (TCXO) with a clipped sinewave output. Through the use of Analog Temperature Compensation, the D75AS is capable of holding sub 0.25-ppm stabilities over the 0 to 70C temperature range.
Features
Model D75AS
TCXO 3.3V Operation Clipped Sinwave Output Frequency Stability: 0.25ppm Temperature Range: 0 to 70C Low Jitter <1pS RMS Tri-State Enable/Disable Function 5x7mm Surface Mount Package Tape and Reel Packaging RoHS Compliant / Lead Free
Absolute Maximum Ratings Parameter Storage Temperature Supply Voltage Input Voltage Operating Specifications Parameter Frequencies Available Frequency Calibration @ 25 C Frequency Stability [(Fmax - Fmin)/2.Fo] Supply Voltage Variation (Vcc 5%) Load Coefficient (5%) Static Temperature Hysteresis Frequency shift after reflow soldering Total Frequency Tolerance Temperature Range Supply Voltage Supply Current Period Jitter Phase Jitter (BW=12kHz to 20MHz) SSB Phase Noise at 10Hz offset SSB Phase Noise at 100Hz offset SSB Phase Noise at 1KHz offset SSB Phase Noise at >10KHz offset Input Characteristics For Enable / Disable Function (Pin 8) Parameter Enable Voltage (High) or open circuit Disable Voltage (Low) Output Disabled Clipped Sinewave Output Characteristics Parameter Output Voltage Output Load Resistance Output Load Capacitance Note: 1) 2) 3) 4) 5) Minimum 1.00 Nominal 10K 10 Maximum Units V pk-pk Ohms pF 8 Note 7 (Vih) (Vil) Minimum 70%Vcc Nominal Maximum 30%Vcc Units Vdc Vdc Note 6 (Vcc) (Icc) (Fo) -1.00 -0.25 -0.025 -0.025 -1.00 -4.60 0 3.135 Minimum Nominal 20.0 3.3 3 0.5 -80 -110 -135 -150 1.00 0.25 0.025 0.025 0.40 1.00 4.60 70 3.465 10 5 1 Maximum Units MHz ppm ppm ppm ppm ppm ppm ppm C Vdc mA ps rms ps rms dBc/Hz dBc/Hz dBc/Hz dBc/Hz Absolute, 3 4 5 1 2 Note (Vcc) Minimum -55 -0.5 -0.5 Nominal Maximum 85 6.0 Vcc+0.5 Units C Vdc Vdc Note
Bulletin Page Revision Date
Tx243 1 of 2 00 21 Oct 2008
6) 7) 8)
Initial calibration @ 25 C. Specifications at time of shipment after 48 hours of operation Frequency stability vs. change in temperature. Frequency change after reciprocal temperature ramped over the operating range. Frequency measured before and after at 25C. Within two hours after reflow. Inclusive of calibration @ 25 C, frequency vs. change in temperature, change in supply voltage (5%), load change (5%), reflow soldering process and 20 years aging, referenced to Fo. Leave Pad 8 unconnected if enable / disable function is not required. When tri-stated, the output stage is disabled but the oscillator and compensation circuit are still active (current consumption < 1 mA). Output is AC coupled. For best performance it is recommended that the circuit connected to this output should have an equivalent input capacitance of 10pF.
Specifications subject to change without notice. All dimensions in inches. (c) Copyright 2008 The Connor-Winfield Corporation
2111 Comprehensive Drive Aurora, Illinois 60505 Phone: 630-851-4722 Fax: 630-851-5040 www.conwin.com
Package Characteristics
Package Ceramic Surface Mount Package.
Ordering Information D75AS - 020.0MHZ *
TCXO SERIES CENTER FREQUENCY
Environmental Characteristics
Vibration: Shock: Soldering: Solderability Vibration per Mil Std 883E Method 2007.3 Test Condition A Mechanical Shock per Mil Std 883E Method 2002.4 Test Condition B. SMD product suitable for Convection Reflow soldering. Peak temperature 260 C. Maximum time above 220 C, 60 seconds. Solderability per Mil Std 883E Method 2003
* For the tape and reel option, add -T to the end of the part number. Example: D75AS-020.0 MHZ -T
Design Recommendations
Vcc, should have a large copper area for reduced inductance. Connect a 0.01uF bypass capacitor <0.1"(2.54mm) from the pad.
Pad Connections
Buffer input load should be equivalent to 15pF. 50 Ohm trace Vcc <1"by design Buffer Ground Top View Ground
Pad 1 2 3 4 5 6 7 8 9 10 Connection Do not connect Do not connect Do not connect Ground Output Do not connect Do not connect Enable / Disable Supply, Vcc Do not connect
8 9
6 5
0.010"(0.254mm) Recommended clearance inductance for internal copper flood. Ground, should have a large copper area for reduced inductance.
10 1 3
4
Top View
Output Waveform
OSC TOP LAYER GROUND LAYER
50 Ohm Trace Without Output Vias Buffer
BOTTOM LAYER
Do not route any traces in the keep out area. It is recommended the next layer under the keep out area is to be ground plane.
10ns 200mV
Package Layout
0.276 0.006 (7.0mm) 0.079 Max. (2.0mm)
D75AS 0847 12.8MHz
Pin 1
.......
0.197 0.006 (5.0mm) 0.025(6 Places) (0.635mm) 0.040 (1.02mm) (6 Places)
Suggested Pad Layout
0.295 (7.49mm) 0.030 (0.76mm) 0.051 (1.28mm)
Test Circuit
E/D DNC DNC
8 Vcc Supply Voltage 9 10 DNC 1
7
6 5 4
10Kohm
Output
0.037 (0.94mm) 0.215 (5.46mm)
1
0.030 (0.762mm) (4 Places)
2
3 4
Top View 1
Keep Out Area*
.01 uF Bypass
2
3
10 pF**
10
0.100 (2.54mm)
9 8
0.038 (0.965mm) (4 Places)
7
6
5
0.051 (1.28mm)
DNC DNC DNC
0.100 (2.54mm)
Dimensional Tolerance: .005 (.127mm) .02 (.508mm)
Tape and Reel Information
* Do not route any traces in the keep out area. It is recommended the next layer under the keep out area is to be ground plane.
DNC = Do Not Connect E/D = Enable / Disable ** NPO Grade component
Solder Profile
Temperature 260C 220C 180C 260C
1
150C 120C
0 120 S Max. Time 10 S 60 S Max. 360 Sec. Max.
US Headquarters: 630-851-4722 European Headquarters: +353-61-472221
Specifications subject to change without notice. All dimensions in inches. (c) Copyright 2008 The Connor-Winfield Corporation
Bulletin Page Revision Date
Tx243 2 of 2 00 21 Oct 2008

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