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VCA8617 Datasheet(PDF) 3 Page - Burr-Brown (TI) |
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VCA8617 Datasheet(HTML) 3 Page - Burr-Brown (TI) |
3 / 26 page VCA8617 SBOS308B − AUGUST 2004 − REVISED NOVEMBER 2004 www.ti.com 3 ELECTRICAL CHARACTERISTICS: AVDD = 3V At TA = +25°C, load resistance = 1kΩ on each output to ground, unless otherwise noted. The input to the preamp (LNA) is single-ended; pre-amp gain is fixed at +20dB, fIN= 2MHz, PG = 01, ATN = 00, and the output from the VCA is differential, unless otherwise noted. VCA8617 PARAMETER CONDITIONS MIN TYP MAX UNITS PREAMPLIFIER Input Resistance 4.5 k Ω Input Capacitance 52 pF Input Bias Current 1 nA Maximum Input Voltage(1) 200 mVPP Input Voltage Noise (TGC) fIN = 5MHz 1.05 nV/ √Hz Input Voltage Noise (CW) fIN = 5MHz 1.15 nV/ √Hz Output Swing (Differential) 2 V Bandwidth 100 MHz Gain 20 dB ACCURACY Gain Slope 0.2V − 1.7V, VCACNTRL 18 dB/V Gain Error 0.2V − 1.7V, VCACNTRL 1.7 dB Output Offset Voltage Differential 0.65 mV GAIN CONTROL INTERFACE Input Voltage (VCACNTRL) Range 0 to 20 V Input Resistance 1 M Ω Response Time 40dB Gain Change, PG = 11 0.2 µs POWER SUPPLY Specified Operating Range 2.85 3.0 3.15 V Power-Down Delay 5 µs Power-Up Delay 100 µs Power Dissipation (TGC Mode) Operating All Channels 825 950 mW PROGRAMMABLE VGA AND LOW-PASS FILTER −3dB Cutoff (low-pass) 14.5 MHz −3dB Cutoff (high-pass) 400 kHz Slew Rate 300 V/ µs Output Impedance 10 Ω Crosstalk 49 dB Output Common-Mode 1.5 V Output Swing (Differential)(2) 2 VPP 3rd-Harmonic Distortion −65 −50 dB 2nd-Harmonic Distortion −60 −50 dB Group Delay Variation ±3 ns CONTINUOUS WAVE PROCESSOR V/I Converter Transconductance 17 20 23 mA/V Common-Mode 1.4 V Max Output Swing 3.4 mAPP LOGIC INPUTS VIN LOW (input low voltage) 0 0.6 V VIN HIGH (input high voltage) 2.1 VDD V Input Current ±1 µA Input Pin Capacitance 5 pF Clock Input Frequency 10k 25M Hz (1) Under conditions when input signal is within linear range of LNA. (2) Under conditions when signal is within linear range of output amplifier. |
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