HIGH STABILITY SMD TCXO/VCTCXO | GNSS AND COMMUNICATIONSRST3225A
The RST3225A employs an analogue ASIC for the oscillator and a high-order temperature compensation circuit in a small font factor 3.2 x 2.5x 0.9 mm package. This low-power SMD Temperature Compensated Crystal Oscillator (TCXO) provides a voltage control option (VCTCXO)
with a wide frequency range available from 13 to 52 MHz. Supply voltage options are 1.8 to 3.3 V.
The high stability RST3225A is designed for high-performance GNSS and communication applications where the required frequency stability±0.5 ppm over operating temperature ranges from -40 to 85°C.

Features

Applications

 Frequency slope and perturbation

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specifications can be customised to theapplication’s requirement

 Excellent phase noise performance Frequency stability ±0.5 ppm over operating

3.2 x 2.5 x 0.9 mm

GNSS
Smartphone
Consumer devices
Communications
Wi-Fi

temperatures from -40 to 85°C

Standard Specifications
Parameter

Min.

Nominal frequency (Fn)

Typ.

Max.

13 – 52

Frequency calibration

Unit

Test Condition / Description

MHz±1ppm

Offset from nominal frequency measured at 25°C ±2°C

±185ppm°C

Frequency stability
over temperature±0.5ppm

Frequency slope±0.1ppm/°C

Two consecutive reflows
The operating temperature range over which thefrequency stability is measured
Referenced to the midpoint between minimum andmaximum frequency value over the specified
temperature range1.
Control voltage set to the midpoint of VC
RIT3225A available for 100 screen test
Minimum of one frequency reading every 2°C over
the operating temperature range 2

Static temperature hysteresis

0.6ppmSensitivity to supply voltage
variations
Sensitivity to load variations±0.1ppm

Frequency change after reciprocal temperature
ramped over the operating range. Frequency
measured before and after at 25°C
VDD varied ±5% at 25°C

±0.2ppm±10% load change at 25°C2

Long term stability±1ppm

Frequency drift over 1 year at 25°C

Acceleration sensitivity

2ppb/gGamma vector of all three axes from 30 to 1500Hz

VV

With a tolerance of ±5%
VDD ≤ 2.3V
VDD > 2.3V
At maximum VDD2
At minimum VDD, specified for load stated in oscillator
output section at 25°C 2Reflow shift
Operating temperature range

Supply voltage (VDD)
Control voltage (Vc) range
Supply current
Output voltage level

-40

0.3
0.4

1.8 – 3.3
0.9
1.4

1.5
2.4
20.8

Output waveformmA
Vpk-pkDC coupled clipped sinewave3

1 Parts should be shielded from drafts causing unexpected thermal gradients. Temperature changes due to ambient air currents on theoscillator can lead to short term frequency drift.
2 Specified for load stated in oscillator output section at 25°C.
3 External AC-Coupling capacitor required. 1 nF or greater recommended.
Issue: A, 28 July 2022
Specifications are subject to change without notice
Copyright © 2022 Rakon Limited. All rights reserved

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HIGH STABILITY SMD TCXO/VCTCXO | GNSS AND COMMUNICATIONS

Model Outline and Recommended Pad Layout

Pin Connections
1*Do not connect / GND / VCO (VC)

2

GND

3

RF output

4

Supply voltage (VDD)* Depending on the specifications

NOTE: Dimensions are in millimetres.

Test Circuit

Issue: A, 28 July 2022
Specifications are subject to change without notice
Copyright © 2022 Rakon Limited. All rights reserved

Page 2 of 2sales@rakon.com