U2797B-AFSG3

TELEFUNKEN Semiconductors U2797B 1000-MHz Quadrature Modulator Description The IC U2797B is a 1000-MHz quadrature modulator that uses TELEFUNKEN’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. The I/Q input impedance is about 150 kW. Adjustment free application makes the direct converter suitable for all digital radio systems up to 1000 MHz, e.g., GSM, DAMPS, PDC. Features D Supply voltage: 5 V (typical) D Low power consumption: 30 mA / 5 V (typical at D 150 kW I/Q input impedance D Excellent sideband suppression by means of duty cycle regeneration of the LO input signal –1 dBm output level) D 50-W single-ended LO and RF port D LO- frequency range of 100 MHz to 1 GHz D SSO 20 package Benefits D Extended talk time due to increased battery life D Few external components result in cost and board space saving D Phase control loop for precise 90° phase shifting D Power down mode D Low LO input level: –10 dBm (typical) D Adjustment-free hence saves time Block Diagram SPD BBAi BBAi 10 9 8 PD 1 5,6 VS Power 7 down V 13 Ref 14 Duty cycle regenerator 19 Phase adj. 20 LO i BBBi BBBi 11 12 94 8185 e Frequency doubler 0° 90 ° 90° control loop M 4 RFo 2, 3, 15, 16, 17, 18 GND Ordeing Information Extended Type Number U2797B-AFS U2797B-AFSG3 Package SSO20 SSO20 Remarks Rail, MOQ 830 pcs. Tape & reel, MOQ 4000 pcs. Rev. A1: 06.09.1995 1 (13) U2797B Pin Description SSO 20 PD GND GND RFO VS VS VS SPD BBAi BBAi 1 2 3 4 5 6 7 8 9 10 94 8186 e TELEFUNKEN Semiconductors U2790B–FS (SSO 20) 20 19 18 17 16 15 14 13 12 11 Phadj Phadj GND GND GND GND LOi VREF BBBi BBBi Pin Symbol Function 1 PD Power down port 2 GND Ground 3 GND Ground 4 RFo RF output 5 VS Supply voltage 6 VS Supply voltage 7 VS Supply voltage 8 SPD Settling time power down 9 BBAi Baseband input A 10 BBAi Baseband input A inverse 11 BBBi Baseband input B 12 BBBi Baseband input B inverse 13 VREF Reference voltage (2.5 V) 14 LOi LO input 15 GND Ground 16 GND Ground 17 GND Ground 18 GND Ground 19/20 Phadj Phase adjustment (not necessary for regular applications) Absolute Maximum Ratings Parameters Supply voltage Pins 5, 6 and 7 Input voltage Pins 9, 10, 11, 12, 14 and 15 Junction temperature Storage temperature range Symbol VS Vi Tj Tstg Value 6 0 to VS 125 – 40 to + 125 Unit V V °C °C Operating Range Parameters Supply voltage range Pins 5, 6 and 7 Ambient temperature range Symbol VS Tamb Value 4.5 to 5.5 – 40 to + 85 Unit V °C Thermal Resistance Junction ambient Parameters SSO 20 Symbol Rthja Value 140 Unit K/W 2 (13) Rev. A1: 06.09.1995 TELEFUNKEN Semiconductors U2797B Electrical characteristics Test conditions (unless otherwise specified): VS = 5 V, Tamb = 25°C, referred to test circuit. System impedance ZO = 50 W, fLO = 900 MHz, PLO = –10 dBm, VBBi = 1 Vpp diff Parameters Supply voltage range Supply current Baseband inputs Input voltage range (differential) Input impedance (single ended) Input frequency range LO input Frequency range Input level 1 Input impedance Voltage standing wave ratio Duty cycle range RF output Output level LO suppression 2 Sideband suppression 2,3 Phase error 4 Amplitude error Noise floor VSWR 3rd order baseband harmonic suppression RF harmonic suppression Power down mode Supply current Settling time Test conditions / Pin Pins 5, 6 and 7 Pins 5, 6 and 7 Pins 9-10, 11–12 Symbol VS IS VBBi ZBBi fBBi Pin 14 fLOi PLOi ZiLO VSWRLO DCRLO Pin 4 fLO = 900 MHz fLO = 150 MHz fLO = 900 MHz fLO = 150 MHz PRFo LORFo SBSRFo Pe Ae NFL VSWRRF SBBH SRFH VPD 0.5 V VPD = 1 V CSPD = 100 pF CLO = 100 pF CRFo = 1 nF Pin 1 –5 30 32 35 30 –1 35 35 40 35