ADA4505-1/ADA4505-2/ADA4505-4 TA = 25°C, unless otherwise noted. 100225100225VSY = 1.8VVSY = 5V80180801806013560135)PHASE)PHASEB4090dB4090(d (IN2045INArees)2045rees)GGAINegGAGAINegP00D (00D (OOEOOPE-L –20–45-L –20–45NASHASNEHPEP–40–90OP–40OP–90–60–135–60–135–80–180–80–180–100–225–100–2251001k10k100k1M 25 0 1001k10k100k1M 26 0 6- 6- FREQUENCY (Hz) 41 FREQUENCY (Hz) 41 07 07 Figure 25. Open-Loop Gain and Phase vs. Frequency Figure 28. Open-Loop Gain and Phase vs. Frequency 6060VV50SY = 1.8V50SY = 5VG = –100G = –1004040)30)B30BdG = –10dG = –10(20(20ININ10GA10G = –1GAG = –100OOPOOP-L –10-LD–10DEE–20OS–20OSLLC –30C –30–40–40–50–50–60 7 –601001k10k100k1M 28 02 1001k10k100k1M 0 6- 6- FREQUENCY (Hz) 41 FREQUENCY (Hz) 41 07 07 Figure 26. Closed-Loop Gain vs. Frequency Figure 29. Closed-Loop Gain vs. Frequency 10k10kVVSY = 1.8VSY = 5VG = –10G = –10G = –1001k1kG = –100G = –1G = –1100)100)ΩΩ((TTZ OUZ OU1010110.1 2 0.1 3 101001k10k100k1M 06 101001k10k100k1M 06 6- 6- FREQUENCY (Hz) 41 FREQUENCY (Hz) 41 07 07 Figure 27. Output Impedance vs. Frequency Figure 30. Output Impedance vs. Frequency
Rev. D | Page 9 of 24 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION PIN CONFIGURATIONS TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ELECTRICAL CHARACTERISTICS—1.8 V OPERATION ELECTRICAL CHARACTERISTICS—5 V OPERATION ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION APPLICATIONS INFORMATION PULSE OXIMETER CURRENT SOURCE FOUR-POLE, LOW-PASS BUTTERWORTH FILTER FOR GLUCOSE MONITOR OUTLINE DIMENSIONS ORDERING GUIDE NOTES NOTES NOTES