APEX MICROTECHNOLOGY CORPORATION • 5980 NORTH SHANNON ROAD • TUCSON, ARIZONA 85741 • USA • APPLICATIONS HOTLINE: 1 (800) 546-2739

2

TYPICAL COMPONENT FUNCTIONS

COMPONENT FUNCTION

R1

Feedback resistor, A side

R2

Input resistor, B side, bridge mode

R3

Feedback resistor, B side

R4

Input resistor, B side

R5

Input resistor, A side

R6

Input bias current measurement (Note 4)

R7

Output current sense resistor or loop for

current probe

R8

Output current sense resistor or loop for

current probe

R9

Input bias current measurement (Note 4)

R10

Noise gain compensation (Note 1)

R11

Resistor divider network for single supply

bias (Note 2)

R12

Resistor divider network for single supply

bias (Note 2)

R13

Noise gain compensation (Note 1)

R14

Input bias current measurement

R15

Input bias current measurement

R16

Resistor divider network for single supply

bias (Note 2)

R17

Resistor divider network for single supply

bias (Note 2)

C1

Input coupling

C2

AC gain set

C3

AC gain or stability (Note 1)

C4

Power supply bypass

C5

Power supply bypass

C6

AC gain or stability (Note 1)

C7

AC gain set

C8

Input coupling

C9

Noise gain compensation (Note 1)

C10

Noise gain compensation (Note 1)

C11

Power supply bypass (Note 3)

C12

Power supply bypass (Note 3)

D1,2,3,4

Flyback protection (Note 5)

C13-16

Bias node noise bypass (Note 2)

EK21

EVALUATION KIT

FOR PA74 PIN-OUT

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Figure 2

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