lt5572 Linear Technology Corporation, lt5572 Datasheet
lt5572
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lt5572 Summary of contents
Page 1
... GENERATOR 10, 12, 15, 17 VCO/SYNTHESIZER Quadrature Modulator DESCRIPTIO The LT5572 is a direct I/Q modulator designed for high performance wireless applications, including wireless infrastructure. It allows direct modulation signal using differential baseband I and Q signals. It supports PHS, GSM, EDGE, TD-SCDMA, CDMA, CDMA2000, W-CDMA and other systems. It may also be confi ...
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... PACKAGE/ORDER I FOR ATIO + 500mV) CC ORDER PART NUMBER LT5572EUF Order Options Tape and Reel: Add #TR Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF Lead Free Part Marking: Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. ...
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... LO feedthrough nulling (unadjusted). Note 17: The difference in conversion gain between the spurious signal • LO – BB versus the conversion gain of the desired signal for BB = 2MHz and LO = 2GHz. Note 18: The input voltage corresponding to the output P1dB. LT5572 = 25° 2GHz 2002MHz ...
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... LT5572 W U TYPICAL PERFOR A CE CHARACTERISTICS P = 0dBm. BBPI, BBMI, BBPQ, BBMQ inputs 0. feedthrough nulling (upper sideband selection unless otherwise noted. (Note 3) Supply Current vs Supply Voltage 140 85°C 130 25°C 120 –40°C 110 100 4.5 5 SUPPLY VOLTAGE (V) 5572 G01 ...
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... LO INPUT POWER (dBm) LT5572 High 25° 2.14GHz 2MHz, I and Q 90° shifted, without image and RF Port Return Loss vs RF Frequency 0 LO PORT LOW LO PORT HIGH, P – ...
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... LT5572 W U TYPICAL PERFOR A CE CHARACTERISTICS P = 0dBm. BBPI, BBMI, BBPQ, BBMQ inputs 0. feedthrough nulling (upper sideband selection unless otherwise noted. (Note Output Power, HD2 and HD3 vs CW Baseband Voltage and Temperature –10 RF –20 HD3 –30 HD2 – ...
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... ESD protection diodes. BBPI, BBMI (Pins 14, 16): Baseband Inputs for the I chan- nel with about 90kΩ differential input impedance. These pins should be externally biased at about 0.5V. Applied common mode voltage must stay below 0.6V. LT5572 High 25° 2.14GHz, ...
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... The I/Q input signals to the LT5572 should be DC coupled with an applied common mode voltage level of about 0.5V in order to bias the LT5572 at its optimum operating point. Some I/Q test generators allow setting the common mode voltage independently. In this case, the common mode voltage of those generators must be set to 0 ...
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... U U APPLICATIO S I FOR ATIO LT5572 BBPI V = 0.5V CM BBMI Figure 1. Simplifi ed Circuit Schematic of the LT5572 (Only I Channel is Drawn) + – GENERATOR Figure 2. DC Voltage Levels for a Generator Programmed at 0.5V L1A 0mA TO 20mA R1A 100Ω C1 DAC R1B L1B 100Ω ...
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... DC negative supply voltage available possible to bias the LT5572 to a common mode base- band voltage level other than 0.5V. Table 1 shows the typical performance for different common mode voltages. LO section The internal LO input amplifi er performs single-ended to differential conversion of the LO input signal ...
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... Enable Interface S 22 Mag Angle Figure 6 shows a simplifi ed schematic of the EN pin 0.424 153 interface. The voltage necessary to turn on the LT5572 0.270 117 is 1V. To disable (shut down) the chip, the enable voltage 0.150 97 must be below 0.5V. If the EN pin is not connected, the 0.057 114 chip is disabled ...
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... BBIM R2 R5 49.9Ω 49.9Ω BBMI GND BBPI V 100Ω GND CC 2 GND J4 3 LT5572 GND 4 GND GND GND BBMQ GND BBPQ BBQM R3 49.9Ω BOARD NUMBER: DC945A Figure 7. Evaluation Circuit Schematic event that the EN pin is pulled high while the V are low ...
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... U U APPLICATIO S I FOR ATIO Application Measurements The LT5572 is recommended for basestation applications using various modulation formats. Figure 10 shows a typical application. Figure 11 shows the ACPR performance for W-CDMA using 1 4-channel modulation. Figures 12, 13 and 14 illustrate the 1-, 2- and 4-channel W-CDMA ...
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... LT5572 U U APPLICATIO S I FOR ATIO Because of the LT5572’s very high dynamic range, the test equipment can limit the accuracy of the ACPR measurement. Consult the factory for advice on the ACPR measurement if needed. The ACPR performance is sensitive to the amplitude match of the BBIP and BBIM (or BBQP and BBQM) input voltage. ...
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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 LT5572 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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... LT5572 RELATED PARTS PART NUMBER DESCRIPTION Infrastructure LT5511 High Linearity Upconverting Mixer LT5512 DC to 3GHz High Signal Level Downconverting Mixer 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 ...