MERCURY+ ™ IC OCXO | RRH AND SMALL CELLS

ROM9070PA
The ROM9070PA uses Rakon’s market‐leading proprietary Mercury+™ technology, delivering the world’s smallest and lowest power OCXO
for Radio applications. This product family achieves ±10 ppb frequency stability over ‐40 to 95°C, with short term ageing less than 1 ppb/day
and frequency 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, ROM9070PA 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 of customer equipment through improved reliability. With a small 9 x 7 mmform factor and few discrete components, a ROM9070PA consumes only 0.4W at room temperature and has faster warm up times than
traditional OCXOs.

Features

Applications


Miniature SC‐cut OCXO with fast warm up timeSuperior close‐in phase noise with high‐Q crystal< 1% VCO linearity
Patented tilt compensation for lifetime
performance Ultra‐reliable OTP memory programming Lower customer Total Cost of Ownership through
VLSI ASIC‐integration

9.7 x 7.5 x 3.9 mm

Base Stations
5G RRH
Small Cells
Microwave transmission systems

Standard Specifications
Parameter

Min.

Nominal frequency

Typ.
10 – 50Unit

Test Condition / Description

MHz

Standard frequencies: 10, 19.2, 20, 25, 25.6,30.72, 38.4, 50 MHz

Frequency calibration

±0.2

ppm

Initial accuracy at 25°C ±2°C

Reflow shift±0.2ppm

Pre to post reflow ∆F (measured ≥ 60 minutes
after reflow)+95°C

Operating temperatures up to 105°C are
available on request±20±10ppb

In still air. Reference to (FMAX + FMIN)/2±20 ppb (Vc), ±10 ppb (Fixed frequency)±0.5ppb/°C

Temperature ramp ≤ 1°C/minuteOperating temperature range‐40Frequency stability temperature
Frequency slope ΔF/ΔT in still air±0.1

Supply voltage stability±5ppb±2% variation, reference to frequency at 3.3V

Load sensitivity±5ppb±10% variation, reference to frequency at 15pF

Warm‐up time

1560secTime needed for frequency to be within±20ppb reference to frequency after 1 hour, at25°C. Parameter is frequency, assembly andoperating history dependentLong term stability (Ageing)

10.3
1.5ppbppm
ppm

Per day, after 30 days of continuous operation
First year
10 years

V±5%mW

Warm up
Steady state in still air at 25°C

Supply voltage (Vcc)

2.7 – 5

Input power

1200
400

Control voltage (Vc) 1

0.25

Frequency tuning

±1.9

1.25

Linearity

1Max.

1500
440
2.25

V

±3.3ppm

Reference to frequency at Vc=1.25 V1%Deviation from straight line curve fit

Oscillator output

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

SSB Phase Noise(Typical value at 25°C)

Frequency
19.2 MHz
30.72 MHz38.4 MHz

1 Hz‐80‐73
‐70

10 Hz
‐110‐105‐102

100 Hz‐138‐133‐132

1 kHz‐154‐153‐150

10 kHz
‐159
‐158
‐155

100 kHz‐160‐160‐157

1 MHz
‐161
‐161
‐159

Unit
dBc/HzThe GND of the control voltage (Vc) needs to be connected directly to pin 2 (GND) as ground lead impedance may cause performance degradation.

www.rakon.com

Page 1 of 2

MERCURY+ ™ IC OCXO | RRH AND SMALL CELLS

Frequency Stability over Temperature @ 30.72 MHz

Fractional frequency (ppb)

Frequency Stability vs Temperature (5 units)‐50‐40‐30‐20‐1025
Frequency Stability (ppb)20151050102030‐5 0‐10‐15‐20‐254050

60708090100

Temperature (°C)

Warm‐up Time @ 19.2 MHz

40

Warm‐up – The First Hour

Frequency Stability (ppb)

Frequency Stability (ppb)

Frequency Stability (ppb)

Warm‐up – The First 2 Minutes
302010Time after power on (sec)

0‐10 0102030405060708090 100 110 120‐20‐30‐4040Frequency Stability (ppb)302010Time after power on (min)0‐10 0102030405060‐20‐30‐40

Model Outline and Recommended Pad LayoutNOTE
 Unit: mm
 Cover: plastic
 Base: FR4
 Finish: 0.05 ~ 0.13 µm Gold over3 ~ 6 µm Nickel

PinConnections

1Control Voltage (Vc) / Do not connect (GND optional)*

2GND

3Output

4

Supply Voltage (Vcc)
for correct operation decouple the supply voltage with a 10μF
capacitor close to the oscillator* Depending on detail specificationwww.rakon.com

Page 2 of 2