OPA4820ID datasheet(7/34 Pages) TI1

Part #	OPA4820ID

Description	Quad, Unity-Gain Stable, Low-Noise, Voltage-Feedback Operational Amplifier

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Manufacturer	TI1 [Texas Instruments]

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OPA4820

SBOS317D − SEPTEMBER 2004 − REVISED AUGUST 2008

www.ti.com

7

TYPICAL CHARACTERISTICS: VS = ±5V (continued)

RF = 402Ω, RL = 100Ω, and G = +2, unless otherwise noted.

100

10

1

INPUT VOLTAGE AND CURRENT NOISE

Frequency (Hz)

10

100

1k

10k

100k

1M

10M

Voltage Noise (2.5nV/

√Hz)

Current Noise (1.7pA/

√Hz)

100

10

1

RECOMMENDED R

S vs CAPACITIVE LOAD

Capacitive Load (pF)

1

10

100

1000

0.1dB Peaking Targeted

90

80

70

60

50

40

30

20

10

0

CMRR AND PSRR vs FREQUENCY

Frequency (Hz)

1k

10k

100k

1M

10M

100M

CMRR

+PSRR

−PSRR

45

40

35

30

25

20

15

TWO−TONE, 3RD−ORDER

INTERMODULATION INTERCEPT

Frequency (MHz)

0

5

10

15

20

25

30

402

Ω

1/4

O P A 4820

PI

P

O

50

Ω

200

Ω

402

Ω

8

7

6

5

4

3

2

1

0

−1

−2

−3

FREQUENCY RESPONSE vs CAPACITIVE LOAD

Frequency (MHz)

110

100

400

C

L = 10pF

C

L = 22pF

C

L =47pF

C

L = 100pF

40 2

Ω

R

S

OPA4820

V

I

V

O

50

Ω

1k

Ω(1)

C

L

402

Ω

NOTE: (1 ) 1k

Ω is optional.

80

70

60

50

40

30

20

10

0

−10

OPEN−LOOP GAIN AND PHASE

Frequency (Hz)

0

−20

−40

−60

−80

−100

−120

−140

−160

−180

100

1k

10k

100k

1M

10M

100M

1G

20 log (AOL)

∠A

OL

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