lt5575 Linear Technology Corporation, lt5575 Datasheet
lt5575
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lt5575 Summary of contents
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... It is suitable for communications receivers where an RF signal is directly converted into I and Q baseband signals with bandwidth up to 490MHz. The LT5575 incorporates balanced I and Q mixers, LO buffer amplifi ers and a precision, high frequency quadrature phase shifter. The integrated on-chip broadband transform- ers provide 50Ω ...
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... Operating Ambient Temperature ..............–40°C to 85°C Storage Temperature Range ...................–65°C to 125°C Maximum Junction Temperature .......................... 125°C CAUTION: This part is sensitive to electrostatic discharge (ESD very important that proper ESD precautions be observed when handling the LT5575. ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL LT5575EUF#PBF LT5575EUF#TRPBF Consult LTC Marketing for parts specifi ...
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... 1900MHz 2100MHz 2500MHz 900MHz (Note 1900MHz 2100MHz 2500MHz F LT5575 MIN TYP MAX 1.5 to 2.7 0.8 to 1.5 1.5 to 2.7 0 490 65Ω// 5pF >10 >10 – 25° –10dBm (–10dBm/tone for 0dBm, unless otherwise noted. LO MIN TYP MAX 3 4 ...
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... LT5575 AC ELECTRICAL CHARACTERISTICS 2-tone IIP2 and IIP3 tests), Baseband Frequency = 1MHz (0.9MHz and 1.1MHz for 2-tone tests), P (Notes PARAMETER Isolation Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: Tests are performed as shown in the confi ...
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... LO INPUT POWER (dBm) LT5575 High 25º 0dBm, unless otherwise noted. LO Supply Current vs Supply Voltage 160 150 85°C 140 25°C 130 120 – ...
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... LT5575 TYPICAL AC PERFORMANCE CHARACTERISTICS (–10dBm/tone for 2-tone IIP2 and IIP3 tests), f Test Circuit Shown in Figure 1 (Note 6). Conversion Gain, IIP3 Input Power at 900MHz 901MHz LO IIP3 30 25 –40°C 25°C 85°C 20 DSB CONV GAIN 5 0 –15 –10 – INPUT POWER (dBm) ...
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... FREQUENCY (MHz) I/Q Gain Mismatch vs Supply Voltage 0.3 0.2 0.1 0.0 –0.1 –0.2 –0.3 800 1100 1400 1700 2000 2300 2600 RF FREQUENCY (MHz) LT5575 High 25º 0dBm, unless otherwise noted. LO Large-Signal DSB Input Power 30 NOTE 7 28 ...
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... LT5575 TYPICAL AC PERFORMANCE CHARACTERISTICS (–10dBm/tone for 2-tone IIP2 and IIP3 tests), f Test Circuit Shown in Figure 1 (Note 6). Conversion Gain Distribution at 1900MHz 25° 3.8 3.9 4 4.1 4.2 4.3 4.4 CONVERSION GAIN (dB) 5575 G28 I/Q Amplitude Mismatch Distribution at 1900MHz vs Temperature 60 –40°C 25°C 50 85°C ...
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... AMP I-MIXER LO BUFFERS 0°/90° RF AMP Q-MIXER BIAS GND EN LT5575 + (Pins 13, 14): Differential Baseband OUT + (Pins 15, 16): Differential Baseband + LPF 16 I OUT – OUT 11 GND LPF 14 Q OUT – 13 ...
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... Figure 2. Top Side of Evaluation Board 10 J3 – I OUT C4 C2 (OPT) (OPT OUT C3 C1 (OPT) (OPT) GND GND LT5575 C10 GND LO (OPT) GND GND EN RF GND R1 100K DC GND PART NUMBER FREQUENCY RANGE AVX 04025C102JAT AVX 0402ZD104KAT LOW BAND: 800 TO 1000MHz AVX TPSA225MO10R1800 MID BAND: ...
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... APPLICATIONS INFORMATION The LT5575 is a direct I/Q demodulator targeting high linearity receiver applications, such as RFID readers and wireless infrastructure. It consists of RF transconductance amplifi ers, I/Q mixers, a quadrature LO phase shifter, and bias circuitry. The RF signal is applied to the inputs of the RF transconductance amplifi ers and is then demodulated ...
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... LT5575 APPLICATIONS INFORMATION The RF input impedance and S11 parameters (without external matching components) are listed in Table 1. Table 1. RF Input Impedance FREQUENCY INPUT Ω (GHz) IMPEDANCE ( ) 0.8 8.1 +j 21.3 0.9 10.5 +j 24.9 1.0 13.8 +j 28.8 1.1 18.6 +j 32.5 1.2 25.2 +j 35.5 1.3 33.6 +j 36.8 1.4 43.1 +j 34.6 1.5 51.4 +j 28.4 1.6 55.8 +j 19.3 1.7 55.4 +j 10.4 1.8 51.8 +j 3.9 1.9 46.9 +j 0.4 2.0 42.3 +j –0.8 2.1 38.4 +j –0.3 2 2.9 2.4 31.5 +j 4.9 2.5 30 2.6 29.9 +j 9.1 2.7 29.7 +j 11.1 LO Input Port The demodulator’s LO input interface is shown in Fig- ure 6. The input consists of an integrated transformer and a precision quadrature phase shifter which generates 0° ...
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... LOAD 0.287 105.1 65Ω 5pF 5pF 65Ω 65Ω Figure 8. I/Q Output Equivalent Circuit LT5575 through a 65Ω resistor. The output DC CC – 1.1V. The outputs can be DC-coupled CC (single-ended), should be larger LOAD (1 + 65Ω/ when the output port is LOAD . For instance, the gain is reduced ...
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... Enable Interface A simplifi ed schematic of the EN pin is shown in Fig- ure 9. The enable voltage necessary to turn on the LT5575 is 2V. To disable or turn off the chip, this voltage should be below 1V. If the EN pin is not connected, the chip is disabled. However not recommended that the pin be – ...
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... 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. 0.115 2.15 ± 0.10 (4-SIDES) 0.200 REF 0.00 – 0.05 LT5575 BOTTOM VIEW—EXPOSED PAD PIN 1 NOTCH R = 0.20 TYP OR 0.35 × 45° CHAMFER TYP 15 16 0.55 ± 0. (UF16) QFN 10-04 0.30 ± 0.05 0.65 BSC ...
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... LT5575 RELATED PARTS PART NUMBER DESCRIPTION Infrastructure LT5514 Ultralow Distortion, IF Amplifi er/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 Demodulator LT5517 40MHz to 900MHz Quadrature Demodulator LT5518 1.5GHz to 2.4GHz High Linearity Direct ...