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Summary of Contents for Nanosurf easyPLL
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Page 1: Reference Manual
easy UHV Preamplifier Reference Manual... - Page 2 Table of Contents easyPLL UHV-Pre-Amplifier for Tuning Fork Theory ....................2 Wiring of the pre-amplifier ..............4 Technical specifications ..............5 Version 1.1 BT 00536...
- Page 3 UHV-Pre-Amplifier for Tuning Fork Theory For high resolution AFM measurements a sensor with high mechanical stiffness (high spring constant) is of geat interest. A quartz tuning fork with integrated tip not only offers this feature but simplifies things as simple electronics can then be used to detect the oscillation.
- Page 4 On one hand as a self-oscillator with subsequent frequency measurements and on the other hand as a PLL tracking oscillator. Both methods can be ideally implemented using the easyPLL FM Sensor Controller and the easyPLL Digital FM Detector. Oscillator Detector...
- Page 5 Wiring of the pre-amplifier This section describes version 3.01 of the UHV preamplifier. The pre-amplifier should be mounted in the UHV chamber as close to the quartz tuning fork as possible. Use of 2 × 100 W resistors for Vs buffering and 10 kW resistor for tip bias buffering recommended (should be placed outside the vacuum cham- ber).
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Page 6: Technical Specifications
Vout Pre Amplifier tip contacted to terminal A though tuning fork electrode bias V 3.01 Technical specifications Power supply: Voltage: ± 15V ±10% Quiescent current: < ± 3mA Sensitivity: ~1mV/Å ½ Noise: 150 fm/Hz (when used with E158 qPlus sensor) Max. - Page 7 P arameter M in T yp M ax U ni ts INPUT OFFSET VOLTAGE Initial Offset 2 / 1 / 1 to T 3/2/ 2 µV/°C vs. Temp 20/20/ 20 vs. Supply to T 76/76/ 76 µV/Month Long-Term Stability INPUT BIAS CURRENT = 0 V = 0 V @ T 1.1/3.2/51 nA...
- Page 8 Nanosurf AG Grammetstrasse 14 CH-4410 Liestal E-Mail info@nanosurf.com Nanosurf AG, 2002 © Version 1.1 BT0053 World Wide Web www.nanosurf.com Printed in Switzerland...
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