ltc5598 Linear Technology Corporation, ltc5598 Datasheet
ltc5598
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ltc5598 Summary of contents
Page 1
... LTC5598 RF = 5MHz TO 1600MHz PA 10nF 5598 TA01 10nF 470nF 50Ω VCO/SYNTHESIZER LTC5598 5MHz to 1600MHz High Linearity Direct 5598 is a direct I/Q modulator designed for high Noise Floor vs RF Output Power and Differential LO Input Power –152 f = 140MHz 2kHz; CW (NOTE 20dBm –154 19 ...
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... ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL LTC5598IUF#PBF LTC5598IUF#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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... I&Q Inputs PP,DIFF (Notes 4, 5) (Notes Baseband AC Input Signal (Note 5.2dBm (Note 3) P OUT LO, SE (Note High (Note Low (Note 7) LTC5598 = 0dBm, single-ended; BBPI, BBMI, LO each, I&Q 90° shifted PP,DIFF MIN TYP MAX 5 to 1600 <–20 ) – ...
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... Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: The LTC5598 is guaranteed functional over the operating temperature range –40ºC to 85ºC. Note 3: At 6MHz offset from the LO signal frequency. 100nF between BBPI and BBMI, 100nF between BBPQ and BBMQ ...
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... AC Baseband Input Signal) –145 5V, 25°C 5.25V, 25°C 4.5V, 25°C 5V, –40°C –150 5V, 85°C (NOTE 3) –155 –160 –165 10 100 1000 RF FREQUENCY (MHz) LTC5598 25º 0.5V , I&Q baseband input signal = 100kHz, DC Output IP3 vs RF Frequency ...
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... LTC5598 TYPICAL PERFORMANCE CHARACTERISTICS 0dBm single-ended, BBPI, BBMI, BBPQ, BBMQ common-mode DC voltage V 0.8V , two-tone baseband input signal = 2MHz, 2.1MHz, 0.5V PP,DIFF – 6MHz; unless otherwise noted. (Note 11) NOISE LO RF Two-Tone Power (Each Tone), IM2 and IM3 vs Baseband Voltage and Temperature (f = 140MHz – ...
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... C 35 – –70 –66 –62 –58 –54 –50 –46 IMAGE REJECTION (dBc) LTC5598 25º – 0.5V , I&Q baseband input signal CMBB DC each tone, I&Q 90° shifted (lower side-band Image Rejection vs LO Frequency ...
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... Applied common-mode voltage must stay below 0.6V Exposed Pad (Pin 25): Ground. This pin must be soldered to the printed circuit board ground plane GND CC1 CC2 GND LOP LOM CAPA CAPB . LTC5598 GNDRF 17 19 5598 BD GND 5598p ...
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... APPLICATIONS INFORMATION The LTC5598 consists of I and Q input differential voltage- to-current converters, I and Q up-conversion mixers output buffer quadrature phase generator and LO buffers. External I and Q baseband signals are applied to the differential baseband input pins, BBPI, BBMI, and BBPQ, BBMQ. These voltage signals are converted to currents and translated to RF frequency by means of double-balanced up-converting mixers ...
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... LTC5598 APPLICATIONS INFORMATION be the signal source for the LTC5598. A reconstruction fi lter should be placed between the DAC output and the LTC5598’s baseband inputs. In Figure 2 a typical baseband interface is shown, using a fi fth-order lowpass ladder fi lter. L1A L2A 0mA TO 20mA ...
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... C5, C7: 10nF –54.7 –25 1 –77.4 –91.6 –114 Figure 4. LOP Port Return Loss vs Frequency for Standard Board (See Figure 10) –137 –156 –165 –176 174 162 LTC5598 REFLECTION COEFFICIENT MAG ANGLE 0.802 –0.9 0.780 –3.2 0.796 –5.9 0.798 –11.4 0.781 –22.4 0.697 –40.3 0.559 – ...
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... LTC5598 APPLICATIONS INFORMATION The LOP port return loss for the low end of the operating frequency range can be optimized using extra 120Ω terminations at the LO inputs (replace C9 and C10 with 120Ω resistors, see Figure 10), and is shown in Figure 5. –4 C9, C10: 120Ω; L1, L2: 0Ω; C5, C7: 100nF EN = LOW ...
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... Figure 8 for EN = High and Low. Enable Interface Figure 9 shows a simplifi ed schematic of the EN pin interface. The voltage necessary to turn on the LTC5598 is 2V. To disable (shut down) the chip, the enable voltage must be below 1V. If the EN pin is not connected, the chip is enabled ...
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... For EN = High, the voltage drop over R1 and R2 is about 0.15V power supply is used that ramps up slower than 10V/μs and limits the overshoot on the supply below 5.6V, R1 and R2 can be omitted. The LTC5598 can be used for base-station applications with various modulation formats. Figure 13 shows a typical application. J1 ...
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... Figure 13: 5MHz to 1600MHz Direct Conversion Transmitter Application UF Package 24-Lead (4mm × 4mm) Plastic QFN (Reference LTC DWG # 05-08-1697) 0.70 0.05 PACKAGE OUTLINE 0.25 0.05 0.50 BSC 0.75 0.05 4.00 0.10 (4 SIDES) 2.45 0.10 (4-SIDES) 0.200 REF 0.00 – 0.05 LTC5598 1nF 4.7μ 5MHz 13 1600MHz 10nF 14 5598 F13 BOTTOM VIEW—EXPOSED PAD PIN 1 NOTCH ...
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... LTC5598 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 ...