AD8505/AD8506/AD8508

Rev. E | Page 2 of 20

TABLE OF CONTENTS

Features .............................................................................................. 1

Applications....................................................................................... 1

General Description ......................................................................... 1

Pin Configurations ........................................................................... 1

Revision History ............................................................................... 2

Specifications..................................................................................... 3

Electrical Characteristics—1.8 V Operation ............................ 3

Electrical Characteristics—5 V Operation................................ 4

Absolute Maximum Ratings............................................................ 5

Thermal Resistance ...................................................................... 5

ESD Caution...................................................................................5

Typical Performance Characteristics ..............................................6

Theory of Operation ...................................................................... 13

Applications Information .............................................................. 15

Pulse Oximeter Current Source ............................................... 15

Four-Pole, Low-Pass Butterworth Filter for Glucose

Monitor........................................................................................ 16

Outline Dimensions ....................................................................... 17

Ordering Guide .......................................................................... 20

REVISION HISTORY

5/10—Rev. D to Rev. E

Added AD8505, 6-Ball WLCSP Package.........................Universal

Changes to Large-Signal Voltage Gain Parameter (Table 1)....... 4

Changes to Large-Signal Voltage Gain Parameter (Table 2)....... 5

Changes to Table 4............................................................................ 6

Updated Outline Dimensions ....................................................... 19

Changes to Ordering Guide .......................................................... 21

10/09—Rev. C to Rev. D

Added AD8505, 5-Lead SOT-23 Package .......................Universal

Changes to General Description, Added Figure 1 ....................... 1

Moved Electrical Characteristics—1.8 V Operation Section,

Changes to Supply Current per Amplifier Parameter, Table 1 .....3

Moved Electrical Characteristics—5 V Operation Section,

Changes to Supply Current per Amplifier Parameter, Table 2 .....4

Changes to Thermal Resistance Section and Table 4................... 5

Changes to Figure 20 and Figure 23............................................... 8

Updated Outline Dimensions ....................................................... 16

Changes to Ordering Guide .......................................................... 17

3/09—Rev. B to Rev. C

Added AD8508, 14-Ball WLCSP Package.......................Universal

Updated Outline Dimensions ....................................................... 17

Changes to Ordering Guide .......................................................... 18

10/08—Rev. A to Rev. B

Added WLCSP Package .....................................................Universal

Added Figure 2; Renumbered Sequentially .................................. 1

Added Input Resistance Parameter ................................................ 3

Changes to Input Capacitance Differential Mode Parameter

Symbol and Input Capacitance Common Mode Parameter

Symbol................................................................................................ 3

Added Input Resistance Parameter ................................................ 4

Changes to Input Capacitance Differential Mode Parameter

Symbol and Input Capacitance Common Mode Parameter

Symbol................................................................................................ 4

Changes to Table 4.............................................................................5

Changes to Figure 46...................................................................... 16

Updated Outline Dimensions....................................................... 17

Added Figure 49 ............................................................................. 17

Changes to Ordering Guide .......................................................... 18

7/08—Rev. 0 to Rev. A

Added AD8508 ...................................................................Universal

Added TSSOP Package ......................................................Universal

Changes to Features Section and General Description Section..1

Added Figure 2; Renumbered Sequentially ...................................1

Changed Electrical Characteristics Heading to Electrical

Characteristics—5 V Operation ......................................................3

Changes to Table 1.............................................................................3

Added Electrical Characteristics—1.8 V Operation Heading.....4

Changes to Table 2.............................................................................4

Changes to Table 3, Thermal Resistance Section, and Table 4....5

Characteristics Section .....................................................................6

Changes to Figure 3, Figure 4, Figure 6, and Figure 7 ..................6

Added Figure 11 and Figure 14 .......................................................7

Changes to Figure 17 Through Figure 20.......................................8

Changes to Figure 21 Through Figure 26.......................................9

Changes to Figure 27, Figure 28, Figure 30, and Figure 31....... 10

Changes to Figure 34, Figure 37, and Figure 38 ......................... 11

Added Figure 39 and Figure 40 .................................................... 12

Added Theory of Operation Section, Figure 41, and

Figure 42 .......................................................................................... 13

Added Figure 43 and Figure 44 .................................................... 14

Added Applications Information Section and Figure 45 .......... 15

Added Figure 46 ............................................................................. 16

Updated Outline Dimensions....................................................... 17

Added Figure 48 ............................................................................. 17

Changes to Ordering Guide .......................................................... 17

11/07—Revision 0: Initial Version