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LT5528 Dataheets PDF



Part Number LT5528
Manufacturers Linear Technology
Logo Linear Technology
Description 1.5GHz to 2.4GHz High Linearity Direct Quadrature Modulator
Datasheet LT5528 DatasheetLT5528 Datasheet (PDF)

FEATURES ■ ■ ■ LT5528 1.5GHz to 2.4GHz High Linearity Direct Quadrature Modulator DESCRIPTIO www.DataSheet4U.com ■ ■ ■ ■ ■ ■ ■ Direct Conversion to 1.5GHz to 2.4GHz High OIP3: 21.8dBm at 2GHz Low Output Noise Floor at 5MHz Offset: No RF: –159.3dBm/Hz POUT = 4dBm: –151.8dBm/Hz 4-Ch W-CDMA ACPR: –66dBc at 2.14GHz Integrated LO Buffer and LO Quadrature Phase Generator 50Ω AC-Coupled Single-Ended LO and RF Ports 50Ω DC Interface to Baseband Inputs Low Carrier Leakage: –42dBm at 2GHz High Image R.

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FEATURES ■ ■ ■ LT5528 1.5GHz to 2.4GHz High Linearity Direct Quadrature Modulator DESCRIPTIO www.DataSheet4U.com ■ ■ ■ ■ ■ ■ ■ Direct Conversion to 1.5GHz to 2.4GHz High OIP3: 21.8dBm at 2GHz Low Output Noise Floor at 5MHz Offset: No RF: –159.3dBm/Hz POUT = 4dBm: –151.8dBm/Hz 4-Ch W-CDMA ACPR: –66dBc at 2.14GHz Integrated LO Buffer and LO Quadrature Phase Generator 50Ω AC-Coupled Single-Ended LO and RF Ports 50Ω DC Interface to Baseband Inputs Low Carrier Leakage: –42dBm at 2GHz High Image Rejection: 45dB at 2GHz 16-Lead QFN 4mm × 4mm Package U APPLICATIO S ■ ■ ■ Infrastructure Tx for DCS, PCS and UMTS Bands Image Reject Up-Converters for PCS and UMTS Bands Low-Noise Variable Phase-Shifter for 1.5GHz to 2.4GHz Local Oscillator Signals The LT®5528 is a direct I/Q modulator designed for high performance wireless applications, including wireless infrastructure. It allows direct modulation of an RF 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 configured as an image reject up-converting mixer, by applying 90° phase-shifted signals to the I and Q inputs. The I/Q baseband inputs consist of voltage-to-current converters that in turn drive double-balanced mixers. The outputs of these mixers are summed and applied to an on-chip RF transformer, which converts the differential mixer signals to a 50Ω single-ended output. The four balanced I and Q baseband input ports are intended for DC coupling from a source with a common-mode voltage level of about 0.5V. The LO path consists of an LO buffer with single-ended input, and precision quadrature generators that produce the LO drive for the mixers. The supply voltage range is 4.5V to 5.25V. , LTC and LT are registered trademarks of Linear Technology Corporation. TYPICAL APPLICATIO 1.5GHz to 2.4GHz Direct Conversion Transmitter Application with LO Feed-Through and Image Calibration Loop VCC 8, 13 14 I-DAC 16 V-I I-CHANNEL EN 1 Q-CHANNEL V-I CAL BASEBAND DSP 2, 4, 6, 9, 10, 12, 15, 17 3 VCO/SYNTHESIZER 0° 90° 7 Q-DAC 5 BALUN 11 PA LT5528 5V RF = 1.5GHz TO 2.4GHz W-CDMA ACPR, AltCPR and Noise vs RF Output Power at 2140MHz for 1, 2 and 4 Channels –55 DOWNLINK TEST MODEL 64 DPCH –140 NOISE FLOOR AT 30MHz OFFSET (dBm/Hz) –60 ACPR, AltCPR (dBc) 4-CH ACPR 2-CH AltCPR –70 1-CH AltCPR –65 LO FEED-THROUGH CAL OUT IMAGE CAL OUT –75 4-CH NOISE 1-CH NOISE –38 –34 –30 –26 –22 –18 ADC 5528 TA01a –80 –42 U U –145 2-CH ACPR –150 4-CH AltCPR 1-CH ACPR –155 –160 –165 –14 RF OUTPUT POWER PER CARRIER (dBm) 5528 TA01b 5528f 1 LT5528 ABSOLUTE (Note 1) TOP VIEW www.DataSheet4U.com AXI U RATI GS U W U PACKAGE/ORDER I FOR ATIO ORDER PART NUMBER 12 GND 17 11 RF 10 GND 9 5 BBMQ 6 GND 7 BBPQ 8 VCC GND BBMI BBPI GND 16 15 14 13 EN 1 GND 2 LO 3 GND 4 VCC Supply Voltage .........................................................5.5V Common-Mode Level of BBPI, BBMI and BBPQ, BBMQ .......................................................2.5V Operating Ambient Temperature (Note 2) ...............................................–40°C to 85°C Storage Temperature Range.................. –65°C to 125°C Voltage on Any Pin Not to Exceed...................... –500mV to VCC + 500mV VCC = 5V, EN = High, TA = 25°C, fLO = 2GHz, fRF = 2.002GHz, PLO = 0dBm. BBPI, BBMI, BBPQ, BBMQ inputs 0.525VDC, Baseband Input Frequency = 2MHz, I&Q 90° shifted (upper sideband selection). PRF, OUT = –10dBm, unless otherwise noted. (Note 3) SYMBOL RF Output (RF) fRF S22, ON S22, OFF NFloor PARAMETER RF Frequency Range RF Frequency Range RF Output Return Loss RF Output Return Loss RF Output Noise Floor CONDITIONS –3dB Bandwidth –1dB Bandwidth EN = High (Note 6) EN = Low (Note 6) No Input Signal (Note 8) POUT = 4dBm (Note 9) POUT = 4dBm (Note 10) POUT/PIN, I&Q 20 • Log (VOUT, 50Ω/VIN, DIFF, I or Q) 1VP-P DIFF CW Signal, I and Q (Note 17) (Note 7) (Notes 13, 14) (Notes 13, 15) (Note 16) EN = High, PLO = 0dBm (Note 16) EN = Low, PLO = 0dBm (Note 16) MIN TYP 1.5 to 2.4 1.7 to 2.2 –15 –12 –159.3 –151.8 –151.8 –6.5 –6 –2.1 –28 7.9 49 21.8 –45 –42 –57.8 1.5 to 2.4 0 –17 –5.5 14.4 20.4 –10 MAX UNITS GHz GHz dB dB dBm/Hz dBm/Hz dBm/Hz dB dB dBm dB dBm dBm dBm dBc dBm dBm GHz dBm dB dB dB dB dBm ELECTRICAL CHARACTERISTICS GP GV POUT G3LO vs LO OP1dB OIP2 OIP3 IR LOFT LO Input (LO) fLO PLO S11, ON S11, OFF NFLO GLO IIP3LO Conversion Power Gain Conversion Voltage Gain Absolute Output Power 3 • LO Conversion Gain Difference Output 1dB Compression Output 2nd Order Intercept Output 3rd Order Intercept Image Rejection Carrier Leakage (LO Feed-Through) LO Frequency Range LO Input Power LO Input Return Loss LO Input Return Loss LO Input Referred Noise Figure LO to RF Small Signal Gain LO Input 3rd Order Intercept 2 U W W W LT5528EUF UF PART MARKING 5528A UF PACKAGE 16-LEAD (4mm × 4mm) PLASTIC QFN TJMAX = 125°C, θJA = 37°C/W EXPOSED PAD IS GROUND (PIN 17) MUST BE SOLDERED TO PCB. Consult LTC Marketing for parts specified with w.


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