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BUF634 Datasheet(PDF) 9 Page - Burr-Brown (TI)

[Old version datasheet] Texas Instruments acquired Burr-Brown Corporation. Click here to check the latest version.
Part # BUF634
Description  250mA HIGH-SPEED BUFFER
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Manufacturer  BURR-BROWN [Burr-Brown (TI)]
Direct Link  http://www.burr-brown.com
Logo BURR-BROWN - Burr-Brown (TI)

BUF634 Datasheet(HTML) 9 Page - Burr-Brown (TI)

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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
BUF634
1k
V
IN
±1V
Motor
1/2
OPA2234
BUF634
10k
10k
±20V
at 250mA
FIGURE 7. Current-Output Valve Driver.
OPA177
BUF634
Valve
V
IN
±2V
10
I
O = ±200mA
FIGURE 4. Boosting Op Amp Output Current.
C(1)
C(1)
pseudo
ground
+
12V
BUF634
10k
10µF
+24V
10k
+
12V
NOTE: (1) System bypass capacitors.
+
FIGURE 6. Pseudo-Ground Driver.
OPA132
Drives headphones
or small speakers.
5k
BUF634
100k
1µF
R
L = 100Ω
f
1kHz
20kHz
THD+N
0.015%
0.02%
250
G = +21
V
IN
V–
BW
V+


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