OPA684ID datasheet(11/31 Pages) TI1

Part #	OPA684ID

Description	Low-Power, Current Feedback OPERATIONAL AMPLIFIER

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Manufacturer	TI1 [Texas Instruments]

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OPA684

11

SBOS219D

www.ti.com

–50

–60

–70

–80

–90

Frequency (MHz)

0.1

20

110

HARMONIC DISTORTION vs FREQUENCY

V

O = 2Vp-p

R

L = 100Ω

See Figure 3

2nd-Harmonic

3rd-Harmonic

2-TONE, 3RD-ORDER

INTERMODULATION DISTORTION

–15 –14 –13 –12 –11 –10

–6

–5

–7

–8

–9

–4

–3

Power at Load (each tone, dBm)

–50

–60

–70

–80

–90

See Figure 3

10MHz

20MHz

5MHz

1MHz

SUPPLY AND OUTPUT CURRENT

vs TEMPERATURE

–25

0

25

50

75

100

125

Ambient Temperature (

°C)

100

75

50

1.5

1.4

1.3

1.2

1.1

1.0

Supply Current

Right Scale

Sourcing Output Current

Left Scale

Sinking Output Current

Left Scale

0.16

0.14

0.12

0.10

0.08

0.06

0.04

0.02

0

Number of 150

Ω Video Loads

14

23

COMPOSITE VIDEO DIFFERENTIAL GAIN/PHASE

dP

dG

G = +2

NTSC, Positive Video

TYPICAL CHARACTERISTICS: VS = +5V (Cont.)

At TA = +25°C, VS = 5V, G = +2, RF = 1.3kΩ, RL = 100Ω, unless otherwise noted.

HARMONIC DISTORTION vs LOAD RESISTANCE

100

1k

Load Resistance (

Ω)

–50

–55

–60

–65

–70

–75

–80

–85

–90

V

O = 2Vp-p

f = 5MHz

See Figure 3

3rd-Harmonic

2nd-Harmonic

–50

–60

–70

–80

–90

Output Voltage (Vp-p)

0.5

3

12

HARMONIC DISTORTION vs OUTPUT VOLTAGE

G = +2

R

L = 100Ω

f = 5MHz

3rd-Harmonic

2nd-Harmonic

See Figure 3

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