U2790B

Features • Supply Voltage 5V (Typically) • Very Low Power Consumption: 150 mW (Typically) for –1 dBm Output Level • Very Good Sideband Suppression by Means of Duty Cycle Regeneration of the LO • • • • • • Input Signal Phase Control Loop for Precise 90° Phase Shifting Power-down Mode Low LO Input Level: –10 dBm (Typically) 50-Ω Single-ended LO and RF Port LO Frequency from 100 MHz to 1 GHz SO16 Package Benefits • No External Components Required for Phase Shifting • Adjustment Free, Hence Saves Manufacturing Time • Only Three External Components Necessary, this Results in Cost and Board Space Saving 1000-MHz Quadrature Modulator U2790B Electrostatic sensitive device. Observe precautions for handling. 1. Description The U2790B is a 1000-MHz quadrature modulator using Atmel®’s advanced UHF process. It features a frequency range from 100 MHz up to 1000 MHz, low current consumption, and single-ended RF and LO ports. Adjustment-free application makes the direct converter suitable for all digital radio systems up to 1000 MHz, e.g., GSM, ADC, JDC. Figure 1-1. Block Diagram SPU BBAI BBAI 8 7 6 Power up PU 1 VS 5,4 LO i Phadj BBBi BBBI 12 15 16 9 10 Duty cycle regenerator Frequency doubler 0° 90° 90°/control loop Σ 3 RFO 2,11,13,14 GND 4583D–CELL–07/06 2. Pin Configuration Figure 2-1. Pinning SO16 PU GND RFO VS VS SPD BBAi BBAi 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 Phadj Phadj GND GND LOi GND BBBi BBBi Table 2-1. Pin 1 2, 11, 13, 14 3 4, 5 6 7 8 9 10 12 15, 16 Pin Description Symbol PU GND RFo VS SPU BBAi BBAi BBBi BBBi LOi Phadj Function Power-up input Ground RF output Supply voltage Settling time power-up Baseband input A Baseband input A inverse Baseband input B Baseband input B inverse LO input Phase adjustment (not necessary for regular applications) 2 U2790B 4583D–CELL–07/06 U2790B 3. Absolute Maximum Ratings Parameters Supply voltage Input voltage Junction temperature Storage temperature range Symbol VS Vi Tj TStg Value 6 0 to VS 125 –55 to +125 Unit V V °C °C 4. Operating Range Parameters Supply voltage range Ambient temperature range Symbol VS Tamb Value 4.5 to 5.5 –40 to +85 Unit V °C 5. Thermal Resistance Parameters Junction ambient SO16 Symbol RthJA Value 110 Unit K/W 6. Electrical Characteristics Test conditions (unless otherwise specified): VS = 5V, Tamb = 25°C, referred to test circuit, system impedance ZO = 50Ω, fLO = 900 MHz, PLO = –10 dBm, VBBi = 1 Vpp differential. No. Parameters Supply voltage range Supply current Baseband Inputs Input-voltage range (differential) Input impedance (single ended) Input-frequency range(5) Internal bias voltage Temperature coefficient Test Conditions Pin 4, 5 4, 5 7-8, 9-10 Symbol VS IS Min. 4.5 24 Typ. 30 Max. 5.5 37 Unit V mA Type* A A 1.1 1.2 2 2.1 2.2 2.3 2.4 2.5 VBBi ZBBi fBBi VBBb TCBB 0 2.35 1000 3.2 1500 mVpp kΩ D D D A D 250 2.5 0.1 2.65