Datasheet AD8505, AD8506, AD8508 (Analog Devices) - 9

AD8505/AD8506/AD8508
TA = 25°C, unless otherwise noted.
120 120 120 120 VSY = 1.8V VSY = 5V 100 PHASE 100 100 PHASE 100 80 80 80 80 60 60 ) ) B 60 60 B d 40 40 d ( GAIN ( 40 40 IN GAIN 20 20 IN rees) rees) GA eg 20 20 GA eg 0 0 D D ( ( OOP E 0 0 E –20 –20 OOP -L -L N HAS N –20 –20 HAS E –40 GAIN, CL = 0pF –40 P E GAIN, CL = 0pF P OP PHASE, CL = 0pF OP –40 PHASE, CL = 0pF –40 –60 –60 GAIN, CL = 50pF GAIN, CL = 50pF –80 PHASE, CL = 50pF –80 –60 PHASE, C –60 L = 50pF GAIN, CL = 100pF GAIN, CL = 100pF –100 –100 PHASE, C –80 –80 L = 100pF PHASE, CL = 100pF –120 –120 –100 –100 100 1k 10k 100k 1M
22 25 0
100 1k 10k 100k 1M
0 0- 0-
FREQUENCY (Hz)
90
FREQUENCY (Hz)
90 06 06 Figure 25. Open-Loop Gain and Phase vs. Frequency Figure 28. Open-Loop Gain and Phase vs. Frequency
50 50 VSY = 1.8V V G = –100 SY = 5V G = –100 40 40 30 30 ) ) B G = –10 B G = –10 d d ( 20 ( 20 IN IN 10 10 GA GA P G = –1 G = –1 0 0 OO OOP -L -L D –10 D –10 E E OS L –20 OS L –20 C C –30 –30 –40 –40 –50 –50 100 1k 10k 100k 1M
17 20 -0
100 1k 10k 100k 1M
-0
FREQUENCY (Hz)
00
FREQUENCY (Hz)
00 69 0 69 0 Figure 26. Closed-Loop Gain vs. Frequency Figure 29. Closed-Loop Gain vs. Frequency
10k 10k V V SY = 1.8V SY = 5V 1k 1k G = 100 G = 100 G = 10 G = 1 G = 10 100 100 G = 1 ) ) Ω Ω ( ( T T 10 Z OU Z OU 10 1 1 0.1 0.1 0.01
1
10 100 1k 10k 100k 1M
280
10 100 1k 10k 100k 1M
03 0- 0-
FREQUENCY (Hz)
90
FREQUENCY (Hz)
90 06 06 Figure 27. ZOUT vs. Frequency Figure 30. ZOUT vs. Frequency Rev. E | Page 9 of 20 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