MERCURY+ ™ IC OCXO | 5G RRHS AND SMALL CELLS

ROM7050PA
The ROM7050PA utilises Rakon’s market-leading proprietary Mercury+™ technology, delivering the world’s smallest and lowest
power OCXO for radio and small cell applications. This product family achieves excellent frequency stability of ±20 ppb over -40 to95°C, with long term ageing less than 3 ppm in 10 years and frequency sensitivity to temperature (i.e. slope) as low as 0.1 ppb/°C.
Low g-sensitivity and extended operating temperature options are available on request. Using Rakon’s innovative high-Q quartz
crystals, ROM7050PA offers superior close-in phase noise performance, enabling Remote Radio Head PLLs to use a single reference
clock to meet both network synchronisation requirements and air interface requirements.
Mercury+™ ASIC-OCXOs enable lower Total Cost of Ownership (TCO) of customer equipment through improved reliability. With aminiature footprint, the ROM7050PA consumes only 400 mW at room temperature and has a faster warm up time than traditional
OCXOs.

Features

Applications

 Smallest OCXO footprint industrywide: 7 x 5 mm Excellent frequency stability: ≤±20 ppb

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(-40 to 95°C, -40 to 105°C available upon request)
Low frequency slope: 0.1 ppb/°CSuperior close-in phase noise; noise floor as low as -160
dBc/Hz for 10 MHz devices
Fast warm-up time (±20 ppb): <15s at -25°C, <20s at -40°C
Long-term stability: ≤3 ppm/10 years
Excellent g-sensitivity: 1 ppb/g

7.5 x 5.5 x 3.3 mm

5G RRHs
Small cells
Optical networks
Microwave transmission
systems

Standard Specifications
Parameter

Min.

Nominal frequencyTyp.

Max.

10 – 50

Frequency calibration±0.2

Reflow shift
Operating temperature range-40

Frequency stability overtemperature in still air
Frequency slope ΔF/ΔT in still air±0.1

Supply voltage stability±5

Load sensitivity±5Warm-up time (F0 – F1)1

15

All causes stability
Vibration sensitivity

0.7

Supply voltage (Vcc)

5

Input power (Vcc = 3.3V)

1200
400

Root Allan Variance (RAV)

30x10 -12
20x10 -12
15x10 -12
15x10 -1270x10 -12

UnitTest Condition / Description

MHzStandard frequencies: 10, 12.8, 19.2, 20, 25,
30.72, 38.4, 50 MHzppm

Initial accuracy at 25°C ±2°C±0.5ppm

After 1 hour recovery at 25°C+95°C

105°C available upon request±20ppb

Reference to (FMAX + FMIN)/2±1ppb/°C

Temperature ramp ≤ 1°C/minuteppb±2% variation, reference to frequency at 3.3 Vppb

±10% variation, reference to frequency at 15 pF

60s

Time after power on needed for frequency F0
to be within ±25 ppb reference to frequency F1after 1 hour

±4.6ppm

Including calibration, temperature, supply
voltage & load changes over a 10 year life

1ppb/gGamma vector

V±2% variation, reference to frequency at 3.3 VmWWarm up
Steady state in still air at 25°C

1500
440

tau = 0.1s
tau = 1.0s
tau = 10s
tau = 100s
tau = 1000s

Oscillator output

Regulated CMOS output (1.0, 1.8, 2.5V) or standard CMOS (options)

SSB Phase Noise(Typical value at 25°C)

Frequency
10 MHz

1 Hz-94

10 Hz
-118

100 Hz-145

1 kHz-159

10 kHz-160

100 kHz-160

1 MHz-160

UnitdBc/Hz

1 Parameter is assembly and operating history dependent.

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MERCURY+ ™ IC OCXO | 5G RRHS AND SMALL CELLS

Frequency Stability over Temperature (FvsT)
FVST

FVST AND TIME PROFILE
Freq. Stability (ppb)

Freq. Stability (ppb)

Warm-Up Time
WARM-UP TIME (≤±20 PPB): < 20S @ -40°C

WARM-UP TIME (≤±20 PPB): < 15S @ -25°C

Model Outline and Recommended Pad Layout
MODEL OUTLINE

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PinConnections

1, 2

NC

3

Do not connect (GND optional)/ Vc_GND

4GND

5Output

6, 7, 8NC

9Supply Voltage (Vcc)

10Do not connect (GND optional)/ Vc

NOTE Unit: mm
 Cover: plastic
 Base: FR4
 Finish: 0.05 ~ 0.13 µm
Gold over 3 ~ 6 µm
NickelPage 2 of 2