lt5578 MOSA electronics corp., lt5578 Datasheet
lt5578
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lt5578 Summary of contents
Page 1
... The LT5578 offers a high performance alternative to pas- sive mixers. Unlike passive mixers, which have conversion loss and require high LO drive levels, the LT5578 delivers conversion gain at signifi cantly lower LO input levels and is less sensitive to LO power level variations. The lower ...
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... ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL LT5578IUH#PBF LT5578IUH#TRPBF Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. Consult LTC Marketing for information on non-standard lead based fi nish parts. For more information on lead free part marking, go to: For more information on tape and reel specifi ...
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... 1950MHz 240MHz RF IF Note 3: The LT5578 is guaranteed functional over the operating temperature range from –40°C to 85°C. Note 4: SSB noise fi gure measurements performed with a small-signal noise source and bandpass fi lter on LO signal generator. No other IF signal applied. LT5578 ...
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... LT5578 TYPICAL DC PERFORMANCE CHARACTERISTICS TYPICAL AC PERFORMANCE CHARACTERISTICS V = 3.3V 25° 140MHz output measured at 900MHz, unless otherwise noted. (Test circuit shown in Figure 1) Gain Distribution at 900MHz 90° 25° –45° 1.5 –0.5 0 0.5 1.0 2.0 2.5 3.0 GAIN (dB) 5578 G02 4 Supply Current vs Supply Voltage ...
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... RF Output Power (1-Tone) 0 –20 –40 –60 –80 –100 2 6 –12 –10 –8 –6 –4 – OUTPUT POWER (dBm) LT5578 740MHz Application: = –1dBm, LO LO-RF Leakage vs RF Output Frequency 0 –10 –20 –30 –40 85°C 85°C –50 25°C 25°C –40°C –40°C – ...
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... LT5578 TYPICAL AC PERFORMANCE CHARACTERISTICS V = 3.3V 25° 140MHz output measured at 900MHz, unless otherwise noted. (Test circuit shown in Figure 1) Conversion Gain and OIP3 vs RF Output Frequency 16 OIP3 12 8 85°C 25°C –40°C 4 GAIN 0 –4 830 870 890 910 930 950 970 ...
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... IM2 Level vs RF Output Power (1-Tone) 0 –20 –40 –60 –80 –100 4 –14 –12 –10 –8 –6 –4 – OUTPUT POWER (dBm) LT5578 1950MHz Application: = –1dBm, LO LO-RF Leakage vs RF Output Frequency 0 –10 –20 –30 –40 85°C –50 25°C –40°C –60 2000 2100 ...
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... LT5578 PIN FUNCTIONS GND (Pins 1, 2, 5-7, 12-14, 16-21, 23, 24): Ground Connections. These pins are internally connected to the exposed pad and should be soldered to a low impedance RF ground on the printed circuit board. + – (Pins 3, 4): Differential IF Input. The common mode voltage on these pins is set internally to 565mV. The DC current from each pin is determined by the value of an external resistor to ground ...
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... AT224-1 – 1.9mm 2.3mm 1.3mm 6.8pF 0Ω 0402 LT5578 OUTPUT L3 TL3 C14 5578 F01 COMMENTS AVX AVX AVX AVX AVX Taiyo Yuden LMK107BJ105MA ...
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... Internal baluns are used to provide single-ended LO input and RF output ports. The IF input is differential. The LT5578 is intended for opera- tion in the 0.4GHz to 2.7GHz frequency range, though operation outside this range is possible with reduced performance ...
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... LO input for use in such cases. Table 3. Single-Ended LO Input Impedance (at Pin 22, No External Match) FREQUENCY (MHz) 300 600 900 1200 1500 1800 2100 2400 2700 3000 LT5578 EXTERNAL MATCHING C13 C12 V BIAS 5578 F04 Figure 4. LO Input Circuit 0 SEE FIGURES 1 AND 8 FOR COMPONENT VALUES – ...
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... Figure 7 illustrates the output return loss performance for several applications. The component values and ap- proximate matching bandwidths are listed in Table 5. DC and RF Grounding The LT5578 relies on the back side ground for both RF and thermal performance. The Exposed Pad must be soldered to the low impedance topside ground plane of LT5578 ...
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... These circuits were evaluated using the board layout shown in Figure 12. 450MHz Application In this case, the LT5578 was evaluated for an application with an IF input at 70MHz output of 450MHz and a high side LO. The LO port is tuned for high side LO in- jection at 520MHz. The matching networks for the three ports are shown in Figure 8 ...
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... 2600 2700 Figure 11. Return Loss Comparison: 740MHz (a), 5578 F09 900MHz (b) and 700MHz to 950MHz (c) Figure 12. LT5578 Evaluation Board (DC1545A) 0 –5 –10 c –15 – –25 600 700 800 900 1000 1100 FREQUENCY (MHz) ...
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... UH Package 24-Lead Plastic QFN (5mm × 5mm) (Reference LTC DWG # 05-08-1747 Rev A) 0.75 0.05 PACKAGE OUTLINE 0.30 0.05 0.65 BSC R = 0.05 TYP 0.75 0.05 0.00 – 0.05 3.25 REF 0.200 REF LT5578 PIN 1 NOTCH R = 0.30 TYP BOTTOM VIEW—EXPOSED PAD OR 0.35 45 CHAMFER R = 0.150 TYP 23 24 0.55 0. 3.20 0.10 3 ...
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... LT5578 RELATED PARTS PART NUMBER DESCRIPTION Infrastructure LT5514 Ultralow Distortion, IF Amplifi er/ADC Driver with Digitally Controlled Gain LT5517 40MHz to 900MHz Quadrature Demodulator LT5518 1.5GHz to 2.4GHz High Linearity Direct Quadrature Modulator LT5519 0.7GHz to 1.4GHz High Linearity Upconverting Mixer LT5520 1.3GHz to 2.3GHz High Linearity Upconverting ...