lt5558 Linear Technology Corporation, lt5558 Datasheet
lt5558
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lt5558 Summary of contents
Page 1
... All other trademarks are the property of their respective owners 100nF LT5558 RF = 600MHz TO 1100MHz PA 11 BALUN 5558 TA01 3 LT5558 600MHz to 1100MHz High Linearity Direct CDMA2000 ACPR, AltCPR and Noise vs RF Output Power at 900MHz for 1 and 3 Carriers –40 DOWNLINK TEST MODEL 64 DPCH –50 3-CH ACPR 3-CH ALTCPR –60 1-CH ACPR –70 ...
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... IN, DIFF Signal, I and Q P-P DIFF (Note 17) (Note 7) (Notes 13, 14) (Notes 13, 15) (Note 16 High 0dBm (Note 16 Low 0dBm (Note 16 2dBm RF ORDER PART NUMBER LT5558EUF 12 GND 11 RF GND 10 9 GND UF PART MARKING 8 5558 http://www.linear.com/leadfree/ = 900MHz 902MHz MIN TYP ...
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... BBPI (or BBPQ) pin and the current fl owing into the BBMI (or BBMQ) pin. Note 19: The input voltage corresponding to the output P1dB. Note 20: BBPI and BBMI shorted together (or BBPQ and BBMQ shorted together). LT5558 = 900MHz 902MHz ...
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... LT5558 TYPICAL PERFORMANCE CHARACTERISTICS f = 902MHz 0dBm. BBPI, BBMI, BBPQ, BBMQ CM input voltage = 2. shifted, without image or LO feedthrough nulling. f 2-tone measurements), unless otherwise noted. (Note 3) Supply Current vs Supply Voltage 130 120 85°C 110 25°C 100 –40°C 90 4.5 4.75 5 SUPPLY VOLTAGE (V) 5558 G01 ...
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... LO INPUT POWER (dBm) 5558 G15 LT5558 = 25° 900MHz –10dBm (–10dBm/tone for RF(OUT) LO and RF Port Return Loss vs RF Frequency 0 LO PORT LOW LO PORT HIGH 0dBm LO –10 –20 ...
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... LT5558 TYPICAL PERFORMANCE CHARACTERISTICS f = 902MHz 0dBm. BBPI, BBMI, BBPQ, BBMQ CM input voltage = 2. shifted, without image or LO feedthrough nulling. f 2-tone measurements), unless otherwise noted. (Note Output Power, HD2 and HD3 vs CW Baseband Voltage and Temperature –10 –20 RF –30 –40 HD3 – ...
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... Pins 10 and 12 are connected to each other inter- nally and function as the ground return for the on-chip RF balun. For best RF performance, Pins 10, 12, 15 and the Exposed Pad, Pin 17, should be connected to the printed circuit board ground plane. LT5558 = 5V High 25° 900MHz, CC ...
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... CC nected to each other internally recommended to use BLOCK DIAGRAM APPLICATIONS INFORMATION The LT5558 consists of I and Q input differential voltage- to-current converters, I and Q up-conversion mixers output signal combiner/balun quadrature phase generator and LO buffers. External I and Q baseband signals are applied to the dif- ferential baseband input pins, BBPI, BBMI, and BBPQ, BBMQ ...
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... DC DC Figure 2. DC Voltage Levels for a Generator Programmed at 1.05VDC for a 50Ω Load and the LT5558 as a Load LT5558 FROM Q LOPI LOMI V = 0.5V REF CM low-frequency high-pass corner together with the LT5558’s differential input impedance of 3kΩ. Usually, capacitors will be chosen equal and in such a way that the – ...
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... LT5558 APPLICATIONS INFORMATION the LO input and the internal in-phase LO and quadra- ture LO signals is fi xed, and is independent of start-up conditions. The phase shifters are designed to deliver accurate quadrature signals for an LO frequency near 900MHz. For frequencies signifi cantly below 750MHz or above 1.1GHz, the quadrature accuracy will diminish, causing the image rejection to degrade. The LO pin input impedance is about 50Ω ...
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... Enable Interface 0.019 –60.8 Figure 6 shows a simplifi ed schematic of the EN pin inter- 0.118 –99.3 face. The voltage necessary to turn on the LT5558 is 1V. 0.178 –115.5 To disable (shut down) the chip, the enable voltage must 0.209 –128.1 be below 0.5V. If the EN pin is not connected, the chip is 0.222 – ...
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... ACPR will be limited by the noise performance of the part. In the middle, an optimum ACPR is obtained. Because of the LT5558’s very high dynamic-range, the test equipment can limit the accuracy of the ACPR measure- ment. Consult Design Note 375 or the factory for advice on ACPR measurement if needed ...
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... LTC1565 is about 2.5V and the CORRECTED optimum input common-mode level of the LT5558 is SPECTRUM around 2.1V and is temperature dependent. To adapt the common-mode level of the LTC1565 to the LT5558, a level shift network consisting and R11 to R16 is 902.25 903.75 used. The output common-mode level of the LTC1565 can ...
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... GND 499Ω 0.1µF V– SHDN Figure 15. Baseband Interface Schematic of the LTC1565 with the LT5558 for RFID applications. 14 U4’s stability while driving the large supply decoupling capacitors C3 and C4. This corrected common-mode EN = HIGH f = 900MHz, LO voltage is applied to the common-mode input pins 2MHz, 0° ...
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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 LT5558 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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... LT5558 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 ...