RT2902 datasheet(11/16 Pages) STMICROELECTRONICS

11 / 16 page

DocID026928 Rev 1

11/16

RT2902

Typical single-supply applications

Figure 18. AC coupled inverting amplifier

Figure 19. AC coupled non-inverting amplifier

1/4

RT2902

2VPP

10 k

e o

6.2 k

100 k

10 k

C I

e I

VCC

100 k

μF

100 k

A= -

(a s s hown A

= -10)

1/4

RT2902

2 V PP

10 k

e o

6.2 k

0. 1

μF

e I

VCC

(a s s hown A

= 11)

A= 1 + R2

100 k

1 M

C I

1 M

100 k

μF

Figure 20. Non-inverting DC gain

Figure 21. DC summing amplifier

10 k

1 M

1/4

RT2902

10 k

e I

+5 V

(mV )

AV =1 +

(A s s hown

= 101 )

1/4

RT2902

100 k

eo = e1 + e2 - e3 - e4

where (e1 + e2)

(e3 + e4)

to keep eo

0 V

≥

Figure 22. Active bandpass filter

Figure 23. High input Z adjustable gain DC

instrumentation amplifier

10 k

1/4

RT2902

100 k

μF

VCC

470 k

330 pF

10 M

470 k

100 k

330 pF

1/4

RT2902

1/4

RT2902

Fo = 1 kHz

Q = 50

Av = 100 (40 dB)

100 k

1/4

RT2902

100 k

2 k

Ga in adjust

100 k

1/4

RT2902

1/4

RT2902

If R1 = R5 and R3 = R4 = R6 = R7

eo = [ 1 +

] (e2 - e1)

As sho wn eo = 101 (e2 - e1)

2R 1

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