EURO QUARTZ EM44GS Series TCXO Clipped Sinewave, 4 Pad FR4 substrate SMD Industry-standard SMD package 11.4 x 9.6 x 4.7mm Close tolerance stabilities from ±0.5ppm over 0° to +50°C ±1ppm over -40 to +85°C Low power consumption RoHS compliant EM44GS - OUTLINES AND DIMENSIONS DESCRIPTION EM44S series TCXOs are packaged in the industry-standard 11.4 x 9.6 x 4.7mm SMD package. With clipped sinewave output, close tolerances are available from ±0.5ppm over 0° to 50°C or ±1ppm over -40° to +85°C. The part has low power consumption. SPECIFICATION Product Series Code TCXO: VCTCXO: Frequency Range: Output Waveform: Initial Calibration Tolerance**: Standard Frequencies: EM44GS VEM44GS 10.0MHz to 27.0MHz Clipped Sinewave <±1ppm at 25°C 10.0, 12.80, 13.0, 14.40, 15.36, 16.384, 19.2, 19.440, and 19.68MHz (Partial list) See table Operating Temperature Range: Frequency Stability vs. Ageing: vs. Voltage Change: vs. Load Change: vs. Reflow: ±1.0 ppm max. first year ±0.3 ppm max. ±5% change ±0.3 ppm max. ±10% change ±1ppm max. for one reflow (Measured after 24 hours) +2.8, +3.0 or +5.0Volts (Specify when ordering) 0.8V p-p minimum 2ms typical, 5ms max. See table below 10kOhm//10pF ±10% -10dB typical, -7dB max. See table DC block, AC coupled -50° to +100°C Supply Voltage: Output Voltage Level: Start-up Time: Current Consumption: Output Load: Harmonic Distortion: SSB Phase Noise: FREQUENCY STABILITY Output Format: Storage Temperature: FREQUENCY STABILITY Frequency Stability (ppm) ±0.5 ±1.0 ±1.5 ±2.0 ±2.5 Temperature Range (°C) 0 ~ +50 ASK P P P P -10 ~ +60 x P P P P -20 ~ +70 x x P P P -30 ~ +75 x x x P PP -40 ~ +85 P x x x x P VEM44GS VOLTAGE CONTROL SPECIFICATION Control Voltage: Standard = +1.5±1.0Volts for all input voltages. (Contact technical sales if +2.5±2.0 Volts is required.) Frequency Deviation: ±6.0 ppm min. Slope Polarity: Positive (increase of control voltage increases output frequency.) Input Impedance: 1.0M min. Modulation Bandwidth: 3.0kHz min. measured at -3dB Linearity: 10% max. PHASE NOISE SSB Phase Noise at 25°C = available, x = not available, ASK = call Technical Sales CURRENT CONSUMPTION Offset (Hz) 10 100 1k 10k 100k EM44GS 13MHz (dBc/Hz) -80 -115 -135 -148 -150 PART NUMBERING PROCEDURE Frequency Range +3.0 V +5.0 V 10.0MHz to 13MHz 1.3mA 2.0mA 13.1MHz to 20MHz 1.5mA 2.2mA 20.1MHz to 27MHz 2.0mA 2.5mA Example: EM44GS3-19.44-2.5/-30+75 Series Description TCXO = EM44GS VCTCXO = VEM44GS Supply Voltage 28 = 2.8 VDC 3 = 3.0 VDC 5 = 5.0 VDC Frequency (MHz) Stability over OTR (±ppm) Operating Temperature Range (OTR) (°C) Lower and upper limits. EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE Tel: +44 (0)1460 230000 Fax: +44 (0)1460 230001 [email protected] www.euroquartz.co.uk