SPD1101-111 ALPHA | Alldatasheet

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Technical content

Features

I For Phase Locked VCOs to 22 GHz I Reference Frequencies Below 50 MHz I New Surface Mount Package Design I Small Footprint (90 x 110 Mils) I Automated Chip on Board Construction SPD1101-111, SPD1102-111, SPD1103-111 Characteristic Value Incident Power 27 dBm Operating Temperature -65 to +150°C Storage Temperature -65 to +175°C ESD Human Body Model Class 1B Absolute Maximum Ratings Electrical Characteristics at 25°C Microwave Signal Schottky Diode Capacitor Step Recovery Diode Part Number Drive Level Barrier V F @ 1 mA C J @ 0 V R T @ 5 mA C C CJ @ 6 V T L TT (dBm) (mV) (pF) ( ΩΩ) (pF) (pF) (nS) (pS) SPD1101-111 -3 to 0 Low 270–350 0.10 24 0.5 0.25 10 70 SPD1102-111 0 to +3 Medium 370–550 0.10 24 0.5 0.25 10 70 SPD1103-111 0 to +13 High 600–700 0.10 24 0.5 0.25 10 70

Description

Alpha has redesigned its product line of sampling phase detectors using automated chip on board manufacturing technology to provide a more uniform, surface mountable, small footprint device without sacrificing the microwave performance of the original design. Sampling phase detectors are used to phase lock a microwave VCO to a stable reference source at a submultiple frequency. The sampling phase detector consists of a step recovery diode, capacitors and a microwave mixer consisting of series pair Schottky diodes. The principle of operation may be described as using the step recovery diode to generate a harmonic comb of the reference oscillator frequency and the Schottky diode as a mixer between the closest reference frequency multiple and the microwave signal generated by the VCO. When these frequencies are identical the IF (beat note) signal is a DC voltage; the IF will be sinusoidal when the frequencies are unequal. The SPD1100 series sampling phase detectors use a selected step recovery diode chip whose carrier lifetime and transition time are appropriate for use in applications allowing reference frequencies below 50 MHz and microwave VCO frequencies as high as 22 GHz. The Schottky diodes used are low capacitance devices capable of efficient mixer performance at frequencies above 22 GHz. The SPD1101-111, SPD1102-111 and SPD1103-111 utilize low, medium and high barrier Schottky diodes and may be selected according to the available power generated by the microwave VCO. Preliminary

Sampling Phase Detectors SPD1101-111, SPD1102-111, SPD1103-111 2 Alpha Industries, Inc. [781] 935-5150 • Fax [978] 241-7906 • Email sales@alphaind.com • www.alphaind.com Specifications subject to change without notice. 9/01A Typical Performance 04 26 8 1 0 2 0 2 2 12 14 16 18 Best Note Voltage (mV) VCO Frequency (GHz) SPD1101-111 200 400 600 800 1000 Ref. Frequency: 100 MHz Ref Input Power: 17 dBm VCO Power: 0 dBm Suggested Circuit REFERENCE FREQUENCY INPUT 10–500 MHz 47 pF 47 pF INPUT TRANSFORMER 22 pFCL CL 39 pF RFC SRD IF OUTPUT VCO INPUT 100 Ω 100 Ω 100 Ω 10 kΩ 10 kΩ -111 Package Outline 0.110 (2.794 mm) A1 50.090 (2.286 mm) 0.015 (0.381 mm) 0.073 (1.854 mm) 0.053 (1.346 mm) 0.017 (0.432 mm) 0.000 0.002 (0.051 mm) 0.088 (2.235 mm) 0.000 0.017 (0.432 mm) 0.037 (0.940 mm) 0.073 (1.854 mm) 0.093 (2.362 mm) 0.108 (2.743 mm) 0.072 (1.829 mm) 0.002 (0.051 mm) 0.039 (0.941 mm) 0.040 (1.016 mm) EPOXY CERAMIC Schematic Diagram SCHEMATIC SRD Input transformer: 10:1 step down impedance ratio.