BUF634PG4 datasheet(9/20 Pages) BURR-BROWN

No de pièce	BUF634PG4

Description	250mA HIGH-SPEED BUFFER

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Fabricant	BURR-BROWN [Burr-Brown (TI)]

Site Internet	http://www.burr-brown.com

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®

BUF634

9

HIGH FREQUENCY APPLICATIONS

The BUF634’s excellent bandwidth and fast slew rate make it

useful in a variety of high frequency open-loop applications.

When operated open-loop, circuit board layout and bypassing

technique can affect dynamic performance.

For best results, use a ground plane type circuit board layout

and bypass the power supplies with 0.1

µF ceramic chip

capacitors at the device pins in parallel with solid tantalum

10

µF capacitors. Source resistance will affect high-frequency

peaking and step response overshoot and ringing. Best

response is usually achieved with a series input resistor of

25

Ω to 200Ω, depending on the signal source. Response

with some loads (especially capacitive) can be improved

with a resistor of 10

Ω to 150Ω in series with the output.

OP AMP

RECOMMENDATIONS

OPA177, OPA1013

Use Low IQ mode. G = 1 stable.

OPA111, OPA2111

OPA121, OPA234(1),

OPA130(1)

OPA27, OPA2107

Low IQ mode is stable. Increasing CL may cause

OPA602, OPA131(1)

excessive ringing or instability. Use Wide BW mode.

OPA627, OPA132(1)

Use Wide BW mode, C1 = 200pF. G = 1 stable.

OPA637, OPA37

Use Wide BW mode. These op amps are not G = 1

stable. Use in G > 4.

NOTE: (1) Single, dual, and quad versions.

OPA

NOTE: (1) C

1 not required

for most common op amps.

Use with unity-gain stable

high speed op amps.

V

IN

V

O

V+

V–

BUF634

C

1

(1)

Wide BW mode

(if required)

BW

FIGURE 5. High Performance Headphone Driver.

FIGURE 8. Bridge-Connected Motor Driver.

1/2

OPA2234

9k

Ω

BUF634

1k

Ω

V

IN

±1V

Motor

1/2

OPA2234

BUF634

10k

Ω

10k

Ω

±20V

at 250mA

FIGURE 7. Current-Output Valve Driver.

OPA177

BUF634

Valve

V

IN

±2V

10

Ω

I

O = ±200mA

FIGURE 4. Boosting Op Amp Output Current.

C(1)

pseudo

ground

+

12V

–

BUF634

10k

Ω

10µF

+24V

10k

Ω

+

12V

–

NOTE: (1) System bypass capacitors.

+

FIGURE 6. Pseudo-Ground Driver.

OPA132

Drives headphones

or small speakers.

5k

Ω

BUF634

100k

Ω

1µF

R

L = 100Ω

f

1kHz

20kHz

THD+N

0.015%

0.02%

250

Ω

G = +21

V

IN

V–

BW

V+

Numéro de pièce similaire - BUF634PG4

Fabricant	No de pièce	Fiches technique	Description
Burr-Brown (TI)	BUF634PG4	248Kb / 12P	250mA HIGH-SPEED BUFFER

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Burr-Brown (TI)	BUF634	200Kb / 11P	250mA HIGH-SPEED BUFFER
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National Semiconductor ...	LM6125	261Kb / 9P	High Speed Buffer
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