TLC2940

TLC2940 HIGH-PERFORMANCE CMOS VOLTAGE-CONTROLLED OSCILLATOR D Stable Oscillation Using External Resistor D Lock Frequency Range: – 35 MHz to 75 MHz (VDD = 5 V ± 0.25 V, TA = – 20°C to 85°C) – 28 MHz to 50 MHz (VDD = 3 V ± 0.15 V, TA = – 20°C to 85°C) D Operating Free-Air Temperature Range, TA = – 20°C to 85°C D 8-Pin Thin Shrinked Small-Outline Package LOGIC VDD VCO OUT FREFINPUT PFD OUT SLAS244 – OCTOBER 1999 PW PACKAGE (TOP VIEW) 1 8 VCO VDD 2 7 BIAS 3 6 VCOIN 4 5 GND description The TLC2940 is a high-performance analog voltage-controlled oscillator (VCO) using Texas Instruments 0.8-µm CMOS process. The VCO oscillating operation can be performed by an external bias resistor connected to the internal oscillation circuitry, and the oscillation frequency range is set by this bias resistor. The lock frequency range for PLL applications is from 35 MHz to 75 MHz (over operating free-air temperature range, VDD = 5 V ± 5%), and from 28 MHz to 50 MHz (over operating free-air temperature range, VDD = 3 V ± 5%). The stable analog PLL can be configured within these frequency ranges. The device is available in an 8-pin TSSOP surface-mount package. The PLL block is configured using a counter, a required LPF, and a phase frequency detector (PFD). AVAILABLE OPTIONS PACKAGE TA TSSOP (PW) – 20°C to 85°C TLC2940IPW functional block diagram BIAS RESISTOR VCO CONTROL VCOIN Bias Circuit VCO OUT TLC2940 VCO BIAS Output Buffer VCO OUT VCOIN Please be aware that a...