RHF7050A

Product catalog summary

Overview: The RHF7050A is a high-frequency Temperature Compensated Crystal Oscillator (TCXO) that utilizes patented analog temperature compensation to achieve tight stability down to ±0.28 ppm. It supports high-frequency differential outputs up to 1 GHz and CMOS outputs up to 180 MHz, housed in a compact 7.0 x 5.0 mm hermetically sealed SMD package.

Standard Specifications:

Nominal Frequency: 25 MHz to 1000 MHz (CMOS output up to 180 MHz).
Frequency Calibration: ±1 ppm initial accuracy at 25 ± 1°C.
Reflow Shift: ±1 ppm measured ≥ 60 minutes after reflow.
Operating Temperature Range: -40°C to 85°C.
Frequency Stability Over Temperature: ±0.28 ppm to ±2.5 ppm, depending on nominal frequency and temperature range.
Frequency Slope: 0.1 ppm/°C with a minimum of 1 frequency reading every 2°C.
Supply Voltage Stability: ±0.1 ppm.
Load Sensitivity: ±10 ppb for HCMOS, ACMOS, and clipped sine wave/sine wave variations.
Long Term Stability (Aging): ±1 ppm per year, ±2 ppm per 2 years, ±6 ppm per 10 years.
Supply Voltage (VCC): 3.3 V ±5%.
Current Consumption: 35 mA (CMOS), 50 mA (LVPECL), 40 mA (LVDS).
Control Voltage (Vc): 1.65 V.
Frequency Tuning: ±3 ppm with nominal control voltage ±1 V.
VCO Pin Input Impedance: 100 kΩ.
Frequency Tuning Linearity: 10% deviation from straight line curve fit.

Oscillator Output Specifications:

CMOS Output: VOL = 10%VDD, VOH = 90%VDD, Duty Cycle = 48-52%.
LVPECL Output: VOL = VDD –1.03 V, VOH = VDD –1.6 V, Duty Cycle measured at VDD –2V.
LVDS Output: Duty Cycle = 48-52% measured at 1.25V.

Features and Applications:

Output options include CMOS, LVPECL, or LVDS.
Custom frequency outputs up to 1 GHz.
Customizable frequency slope and perturbation specifications.
VCO tilt compensation.
Applications include networking, base stations, communications, DSL/ADSL, and IP timing.

Additional Information:

SSB Phase Noise typical value at 25°C.
Standard frequencies are multiples of 25 (e.g., 25, 50, 100, 125 MHz).
Contact sales for availability of other frequencies.
Model outline and recommended pad layout provided.
Pin connections include Vc, E/D, GND, Output, Complementary Output, and VDD.
RMS Jitter: 1.75 ps in fractional mode and 0.61 ps in integer mode (12 kHz ~ 20 MHz).

Catalog excerpts

RHF7050A The RHF7050A employs patented analogue temperature compensation to deliver tight stability down to ±0.28 ppm for high frequency differential outputs up to 1 GHz (or CMOS outputs up to 180 MHz) in a small 7.0 x 5.0 mm hermetically sealed SMD package. Base Stations Communications Standard Specifications Parameter Frequency stability over temperature Reference to (Fmax + Fmin)/2. The best available stability depends on the nominal frequency and selected operating temperature range Minimum of 1 frequency reading every 2°C, over the operating temperature range  ppm ppm ppm Supply voltage, VCC Current (CMOS) Current (LVPECL) Current (LVDS) Oscillator output (CMOS) VOL VOH Duty cycle Oscillator output (LVPECL) VOL VOH Duty cycle

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