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Tue Jul 2 11:21:24 2013, Erica, DailyProgress, fiber optic, mode matching        Wed Jul 3 09:46:48 2013, Erica, DailyProgress, fiber optic, mode matching           Thu Jul 11 01:40:19 2013, Erica, DailyProgress, fiber optic, mode matching              Fri Jul 12 00:51:39 2013, Erica, Notes, fiber optic, mode matching                 Tue Jul 16 10:27:47 2013, Erica, Notes, fiber optic, mode matching, beam recombination                    Tue Jul 16 11:02:47 2013, Erica, Notes, fiber optic, mode matching, beam recombination                       Wed Jul 17 11:58:47 2013, Erica, Notes, fiber optic, mode matching, beam recombination                          Wed Jul 17 18:29:37 2013, Erica, DailyProgress, fiber optic, reducing drift in the recombined beam                             Sat Jul 20 23:39:09 2013, Erica, DailyProgress, fiber optic, reducing drift in the recombined beam                                Tue Jul 23 10:29:12 2013, Erica, DailyProgress, fiber optic, reducing drift in the recombined beam                                   Tue Jul 23 11:43:00 2013, Evan, DailyProgress, Electronics Equipment, Zach's op-amp recommendations                                   Fri Jul 26 11:07:44 2013, Erica, DailyProgress, BEAT, circuit for measuring temperature fluctations on CTN table                                      Fri Jul 26 11:22:45 2013, Erica, DailyProgress, BEAT, circuit for measuring temperature fluctations on CTN table                                         Fri Jul 26 11:45:28 2013, Erica, DailyProgress, BEAT, circuit for measuring temperature fluctations on CTN table                                            Mon Jul 29 13:30:26 2013, Erica, DailyProgress, BEAT, adding resistor, capacitor, and sockets                                               Tue Jul 30 12:23:41 2013, Erica, DailyProgress, BEAT, addressed noise problem, DC signal                                                  Thu Aug 1 00:25:02 2013, Erica, DailyProgress, fiber optic, insulating foam                                                     Fri Aug 2 12:38:41 2013, tara, DailyProgress, fiber optic, insulating foam                                                        Tue Aug 6 12:31:24 2013, Erica, DailyProgress, fiber optic, insulating foam                                                           Wed Aug 7 13:27:00 2013, Erica, DailyProgress, fiber optic, more foam, calculations for convertion from voltage to frequency                                                              Wed Aug 7 18:53:20 2013, Erica, DailyProgress, fiber optic, noise budget, Matlab notes.                                                                 Tue Aug 13 12:39:36 2013, Erica, DailyProgress, fiber optic, rewrote calculations for converting from voltage noise to frequency noise                                                           Tue Aug 13 12:28:20 2013, Erica, Notes, Electronics Equipment, new AD 590 circuit and its noise calculation, beam alignment                                                              Fri Aug 16 10:35:44 2013, Erica, Notes, Electronics Equipment, AD590 msrmt, conversion to freq noise                       Tue Jul 30 16:19:32 2013, Erica, Notes, fiber optic, setup for beam recombination                       Mon Aug 5 12:21:00 2013, Erica, Notes, fiber optic, calculation: phase change for fiber        Tue Jul 30 15:48:47 2013, Erica, DailyProgress, fiber optic, noise for GYRO

Message ID: 1252     Entry time: Tue Jul 23 11:43:00 2013     In reply to: 1251 Author: Evan  Type: DailyProgress  Category: Electronics Equipment  Subject: Zach's op-amp recommendations

Zach wrote up his thoughts on how to choose the right op-amp in ATF:1752. His recommendation for an AD743 replacement is the ADA4627. It has lower current noise and only slightly higher voltage noise compared to the AD743. Apparently the AD743 was only discontinued in its 8-DIP form; it lives on as a 16-pin SOIC. According to the datasheet, the 8 extra pins do nothing, so I have no idea why they've chosen to manufacture it in this way (maybe they can't fit everything onto an 8-SOIC die?).

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