0

-45

-90

-135

-180

100 k

1 M

10 M

100 M

Gain 2

Gain 1

PHASE SHIFTvs. FREQUENCY

Frequency, f (Hz)

UPC1663G

TYPICAL APPLICATIONS

• Application for +5 V Single Supply

• Photo Signal Detector

Since the input impedance of the IC falls when the gain rises, stable operation can

be achieved by inserting a FET buffer when necessary as illustrated above.

+5V

2.2

µ

1000

1000

V+

+5V

3 k

3 k

2.2

µ

1000

2.2

µ

1000

50

Ω

50

Ω

50

Ω

50

Ω

1000

1663

V-

Vc

Vc

R3

Vc + 5 V

R1

R5

1 k

Ω

R6

1 k

Ω

Ve - 5 V

R2

75

Ω

R4

50

Ω

C2

C1

1000 pF

1000 pF

50

Ω

50

Ω

2.2

µ

2.2

µ

PIN PHOTO

DIODE

Q1