TRF2056 Datasheet | Texas Instruments

TRF2056 LOWĆVOLTAGE 1.2ĆGHz FRACTIONALĆN/INTEGERĆN SYNTHESIZER D 1.2-GHz Operation D Two Operating Modes: - Philips SA7025 Emulation Mode Terminal-for-Terminal and Programming patible - Extended Performance Mode (EPM) D Dual RF-IF Phase-Locked Loops D Fractional-N or Integer-N Operation D Programmable EPM Fractional Modulus of 1- 16 D Normal, Speed-Up, and Fractional pensation Charge Pumps D Low-Power Consumption CLOCK DATA STROBE VSS RFIN RFIN VCCP REFIN RA AUXIN SLWS111- NOVEMBER 2000 PW PACKAGE (TOP VIEW) 1 20 2 19 3 18 4 17 5 16 6 15 7 14 8 13 9 12 10 11 VDD TSETUP LOCK/TEST VDDA PHP VSSA PHA description The TRF2056 device is a low-voltage, low-power consumption 1.2-GHz fractional-N/integer-N frequency synthesizer ponent for wireless applications. Fractional-N division and an integral speed-up charge pump achieve rapid channel switching. Two operating modes are available: 1) SA7025 emulation mode in which the device emulates the Philips SA7025 fractional-N synthesizer and 2) extended performance mode (EPM), which provides additional Features , including fractional accumulator modulos from 1 to 16 (pared to only 5 or 8 for the SA7025 synthesizer). The TRF2056 device provides external loop filters and all functions necessary for voltage-controlled oscillator (VCO) control in a dual phase-locked loop (PLL) frequency synthesizer system. A main channel is provided for radio frequency (RF) channels and an auxiliary channel for intermediate frequency (IF) channels. The current-output charge pumps directly drive passive resistance-capacitance (RC) filter networks to generate VCO control voltages. Rapid main-channel frequency switching is achieved with a charge pump arrangement that increases the current drive and alters the loop-filter frequency response during the speed-up mode portion of the switching interval. These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam...