lt5557 Linear Technology Corporation, lt5557 Datasheet
lt5557
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lt5557 Summary of contents
Page 1
... The IF output is partially matched and usable for IF frequencies up to 600MHz. The LT5557’s high level of integration minimizes the total solution cost, board space and system-level variation. , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. ...
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... Storage Temperature Range ................ – 65°C to 125°C Junction Temperature (T )................................... 125°C J CAUTION: This part is sensitive to electrostatic discharge (ESD very important that proper ESD precautions be observed when handling the LT5557. DC ELECTRICAL CHARACTERISTICS V = 3.3V High 25°C, unless otherwise specified. Test circuit shown in Figure 1. (Note 3) CC ...
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... Note 3: Specifications over the –40°C to 85°C temperature range are assured by design, characterization and correlation with statistical process controls. Note 4: SSB Noise Figure measurements performed with a small-signal noise source and bandpass filter on RF input, and no other RF signal applied. LT5557 = 3.3V High 25° MIN ...
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... LT5557 W U TYPICAL PERFOR A CE CHARACTERISTICS Midband (No external RF/LO matching) 240MHz IF output, P unless otherwise noted. Conversion Gain, IIP3 and Frequency 26 24 IIP3 22 20 LOW-SIDE LO 18 HIGH-SIDE SSB 25° 240MHz 1.6 1.7 1.8 1.9 2.0 2.1 2.2 RF FREQUENCY (GHz) 5557 G01 Conversion Gain and IIP3 ...
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... 0dBm LO –40 –40°C 25°C 85°C –45 –50 –55 450MHz APPLICATION –60 400 600 800 6 LO FREQUENCY (MHz) 5557 G14 LT5557 = –3dBm 25° 1710MHz IF = 240MHz P = –6dBm 5557 G12 T = 25°C A LOW-SIDE 240MHz 12.0 12.2 5557 G27 ...
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... LT5557 W U TYPICAL PERFOR A CE CHARACTERISTICS 900MHz application (with external RF/LO matching), 140MHz IF output, P low-side LO at 0dBm, unless otherwise noted. Conversion Gain, IIP3 and Frequency 28 26 IIP3 24 22 LOW-SIDE 25° 140MHz SSB 750 ...
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... Entire IC. This must be soldered to the printed circuit board ground plane REGULATOR LIMITING AMPLIFIERS V REF V CC1 RF 3 DOUBLE-BALANCED MIXER BIAS CC2 CC1 pin and decoupled CC2 (Pins 10, 11): Differential Outputs for the IF EXPOSED 17 PAD GND – GND 9 5557 BD LT5557 CC 5557fa 7 ...
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... REF DES L4, C4 DISCRETE IF BALUN GND LT5557 – GND CC2 CC1 5557 F02 REF DES L4, C4 ε ...
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... U U APPLICATIO S I FOR ATIO Introduction The LT5557 consists of a high linearity double-balanced mixer, RF buffer amplifier, high speed limiting LO buffer amplifier and bias/enable circuits. The RF and LO inputs are both single ended. The IF output is differential. Low side or high side LO injection can be used. ...
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... U U APPLICATIO S I FOR ATIO series transmission line/shunt capacitor matching topol- ogy allows the LT5557 to be used for multiple frequency standards without circuit board layout modifications. The series transmission line can also be replaced with a series chip inductor for a more compact layout. ...
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... Transformer - Based Bandpass 0.290 –43.5 • Discrete IF balun 0.154 –107.5 0.271 111.6 LT5557 DIFFERENTIAL OUTPUT IMPEDANCE (R 1 560 || – j63.7k (2.6pF) 70 556 || – j870 (2.6pF) 140 551 || – j440 (2.6pF) 190 523 || – j320 (2.6pF) 240 529 || – ...
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... In this case, L1 (and C3) can be eliminated, and the 8:1 transformer alone is adequate for IF matching. The LT5557 was characterized with IF frequencies of 70MHz, 140MHz, 240MHz, 360MHz and 450MHz. The values of L1 and C3 used for these frequencies are tabulated in Figure 1 and repeated in Figure 9. In all cases high-Q 0603 wire-wound chip inductor, for highest conversion gain ...
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... OUT C6 6.0pF 270nH || 3.3kΩ 4.7pF 150nH 3.0pF 82nH Figure 12. Conversion Gain, IIP3 and SSB Output 2.2pF 47nH Frequency Using Discrete IF Balun Matching LT5557 0 –10 360 MHz –20 240 MHz 190 MHz 450 MHz –30 50 150 250 350 450 ...
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... Enable Interface Figure 14 shows a simplified schematic of the EN pin interface. The voltage necessary to turn on the LT5557 is 2.7V. To disable the chip, the enable voltage must be less than 0.3V. If the EN pin is allowed to float, the chip will tend to remain in its last operating state. Thus it is not recom- mended that the enable function be used in this manner ...
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... UF Package 16-Lead Plastic QFN (4mm × 4mm) (Reference LTC DWG # 05-08-1692) 0.72 ±0.05 PACKAGE OUTLINE 0.30 ±0.05 0.65 BSC 0.75 ± 0.05 2.15 ± 0.10 (4-SIDES) 0.200 REF 0.00 – 0.05 LT5557 BOTTOM VIEW—EXPOSED PAD PIN 1 NOTCH R = 0.20 TYP OR 0.35 × 45° CHAMFER R = 0.115 TYP 15 16 0.55 ± 0. (UF16) QFN 10-04 0.30 ± 0.05 ...
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... LT5557 RELATED PARTS PART NUMBER DESCRIPTION Infrastructure LT5511 High Linearity Upconverting Mixer LT5512 1KHz-3GHz High Signal Level Active Mixer LT5514 Ultralow Distortion, IF Amplifier/ADC Driver with Digitally Controlled Gain LT5515 1.5GHz to 2.5GHz Direct Conversion Quadrature Demodulator LT5516 0.8GHz to 1.5GHz Direct Conversion Quadrature ...