DDSPA Direct Digital Synthesizers

Description

Direct Digital Synthesizers models offer high frequency accuracy and stability and extremely fast switching times less than 100ns. They will be preferred to VCOs when high stability and accuracy is necessary. They can be modulated (amplitude) from an analog or digital external signal. The frequency is externally controlled by a digital signal (15 to 31 bits). An external power amplifier will be required to generate the RF power levels required by the AO device.

PHASE LOCKED Versions with 2 inputs (option) : DDS outputs with common Reference for high stability frequency difference

Datasheet (DDSPAxx-d024)

Additional information

Number of Outputs

1, 2, Custom

Frequency range (MHz)

Associated to AO device, Custom

Max RF power(W)

1, 2.5, 4, 10, 20, Associated to AO device, Custom

Modulation Input Control (AM)

8 bits digital (256 levels), Analog 0-5 / 50 Ω

Frequency Modulation input

15 bits (15.259 KHz), 23 bits (59.6 Hz), 31 bits (0.23 Hz)

Phase locked

No, Yes

Version (Power supply)

Laboratory 110-230VAC, OEM 24 VDC

0 dBm output

No, Yes

Frequency Stability (ppm/°C)

+/- 1

Frequency step / Accuracy

HR: 0.23 Hz (31 bits), LR: 15.259 KHz (15 bits), MR: 59.6 Hz (23 bits)

Commutation / sweeping time

≤ 40 (LR), ≤ 64 (MR), ≤ 80 (HR)

Output RF power (dBm)

-30 to 0 (to be associated with AA Amplifier)

Power Supply OEM version (24 VDC)

0.25A

Rise Time/Fall time (ns)

<3 @200MHz @analog, < 25 (+typ 25ns conversion for DAC 8 bits) @digital

Harmonics (dBc)

H2 > 30, H3 > 20

Input / Output impedance

50

VSWR

< 1.2/1

Extinction Ratio (dB)

45 (for F<250MHz), Option High extinction on request

Input / Output connectors

HD44 / SMA (OEM)

Size / Weight

Lab version: 19”, 2U nom 4 Kgs, OEM: 129 x 61 x 28 mm3 / 275 g

Heat Exchange

Conduction through baseplate for OEM version

Operating Temperature

10 to 40 (max Tcase 50, OEM version)

Storage Temperature

-40 to +70 non condensing