lt5546 Linear Technology Corporation, lt5546 Datasheet
lt5546
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lt5546 Summary of contents
Page 1
... All other trademarks are the property of their respective owners. 1.8V C1 1nF OUT – I OUT IF DET C3 1.8pF + Q OUT – Q OUT LT5546 GND 5546 TA01 LT5546 U Total Harmonic Distortion vs IF Input Level at 1.8V Supply – 280MHz IF 280.1MHz IF, 2 – 570MHz 2xLO 800mV DIFFERENTIAL OUT P-P –35 –40 –45 –50 –55 –60 – ...
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... Single Ended, C LOAD (Note –25.5dBm, 280MHz IF –25.5dBm, 280.1MHz (Note 7) IF ORDER PART TOP VIEW NUMBER LT5546EUF 12 STBY + 11 2xLO 17 – 2xLO PART MARKING 5546 UF PACKAGE = 125°C, θ ...
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... Q and Q OUT OUT frequencies are 280MHz and 280.1MHz, with f Note 8: The typical parameter is defined as the mean of the absolute values of the data distribution. Note 9: IF frequency is 125MHz, with f LT5546 = –5dBm (Note 5 284MHz, 2× STBY = V , unless otherwise noted. (Note MIN ...
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... LT5546 W U TYPICAL PERFOR A CE CHARACTERISTICS (Note 5 284MHz –30dBm, I and Q outputs 800mV IF IF unless otherwise noted. (Note 3) Supply Current vs Supply Voltage 28 85°C 26 25°C 24 –40° 1.75 2.25 2.75 3.25 3.75 4.25 4.75 5.25 SUPPLY VOLTAGE (V) Gain and Noise Figure vs Control Voltage at 1.8V Supply ...
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... IF Input CW Power at 3V Supply 1 280MHz IF 1.2 1.0 85°C 0.8 25°C 0.6 0.4 –40°C 0.2 –40 –30 –20 – INPUT CW POWER (dBm) 5546 G14 LT5546 = 570MHz –5dBm 2×LO 2×LO = 25° STBY = Total Harmonic Distortion vs IF Input Power at 1.8V Supply and 800mV Differential Out P-P – 280MHz IF 280.1MHz IF,2 – ...
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... LT5546 W U TYPICAL PERFOR A CE CHARACTERISTICS (Note 5 284MHz –30dBm, I and Q outputs 800mV IF IF unless otherwise noted. (Note 3) IF Detector Output Voltage vs IF Input CW Power and Supply Voltage 1 280MHz IF 1.2 5.25V 1.0 3V 1.8V 0.8 0.6 0.4 0.2 –40 –30 –20 – INPUT CW POWER (dBm) 5546 G16 CTIO S GND (Pins 1, 4 and 17): Ground ...
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... W BLOCK DIAGRA U U APPLICATIO S I FOR ATIO The LT5546 consists of a variable gain amplifier (VGA), I/Q demodulator, quadrature LO generator, lowpass fil- ters (LPFs), clipping amplifiers (clippers) and bias cir- cuitry. The IF signal is fed to the inputs of the VGA. The VGA gain is typically set by an external signal in such a way that the amplified IF signal delivered to the I/Q mixers is constant ...
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... LT5546 U U APPLICATIO S I FOR ATIO C3 L1 56pF 56nH IF INPUT 5.6pF 120nH 56nH Figure 1. Example L-C IF Input Matching Network at 280MHz Table 1. The Component Values of Matching Network L1, L2, L3, C1, C2 and C3. f (MHz) L1, L2(nH) C1, C2(pF 340 34 100 159 15.9 150 106 10.6 200 80 8.0 250 64 6.4 300 53 5 ...
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... Baseband Circuit The baseband circuit consists of I/Q low-pass filters, I/Q hard limiters (clippers) and I/Q output buffers. The hard limiters operate as linear amplifiers normally. However high level input temporarily overloads a linear amplifier, LT5546 2xLO – ...
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... OUT OUT OUT OUT 1 12 GND STBY 2XLO – LT5546 – IF 2XLO 4 9 GND DET CC CTRL GND V CC1 C15 C22 C16 1nF 1µF 1nF V CTRL OVERLOAD ...
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... VGA I-MIXER LPF 15nH 3 0° Q-MIXER 11 90° LPF CLIPPER 3.3pF 39nH f/2 10 3.3pF 1,4,17 LT5546 – + – and Q outputs of the LT5546 OUT OUT BASEBAND HARD PROCESSOR CLIPPER 16 A/D 15 I-OUTPUTS IF DET 7 A CTRL D/A 14 A/D 13 Q-OUTPUTS HARD 12 STBY 9 LT5546 EN ...
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... LT5546 PACKAGE DESCRIPTIO 4.35 ± 0.05 2.15 ± 0.05 (4 SIDES) 2.90 ± 0.05 0.30 ±0.05 0.65 BSC RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS NOTE: 1. DRAWING CONFORMS TO JEDEC PACKAGE OUTLINE MO-220 VARIATION (WGGC) 2. DRAWING NOT TO SCALE 3. ALL DIMENSIONS ARE IN MILLIMETERS RELATED PARTS PART NUMBER DESCRIPTION Infrastructure LT5511 High Signal Level Upconverting Mixer ...