FHP3230 FAIRCHILD [Fairchild Semiconductor], FHP3230 Datasheet - Page 12

• Manufacturer Part Number: FHP3230
• Description: Single, Dual, and Quad, High Speed, 2.7V to 12V, Rail-to-Rail Amplifiers
• Manufacturer: FAIRCHILD [Fairchild Semiconductor]

www.fairchildsemi.com
Applications Information
General Description
The FHP3130 (single), FHP3230 (dual), and FHP3430 (quad)
are low cost, high performance, voltage feedback amplifiers that
consume only 2.5mA of supply current per channel while pro-
viding ±100mA of output current. These amplifiers are designed
to operate from 2.7V to 12V (±6V) supplies. The common mode
voltage range extends below the negative rail and the output
provides rail-to-rail performance.
The FHP3130, FHP3230, and FHP3430 are designed on a
complimentary bipolar process and provide 170MHz of band-
width and 110V/µs of slew rate at a supply voltage of ±5V. The
combination of low power, rail-to-rail performance, low voltage
operation, and tiny package options make these amplifiers well
suited for use in many general purpose high speed applications.
These amplifiers also provide excellent video specifications.
They offer extremely low differential gain and phase (0.008%/
0.01˚) and 0.1dB gain flatness to 16MHz for superb standard
definition video performance. Their output drive capability effort-
lessly supports 4 video loads.
Driving Capacitive Loads
The Frequency Response vs. C
response of the FHP3230 Family. A small series resistance (R
at the output of the amplifier, illustrated in Figure 27, will
improve stability and settling performance. R
Frequency Response vs. C
mum bandwidth with less than 1dB of peaking. For maximum
flatness, use a larger R
Power Dissipation
The maximum internal power dissipation allowed is directly
related to the maximum junction temperature. If the maximum
junction temperature exceeds 150°C for an extended time, device
failure may occur.
The FHP3130, FHP3230 and FHP3430 are short circuit protected.
However, this may not guarantee that the maximum junction
temperature (+150°C) is not exceeded under all conditions.
RMS Power Dissipation can be calculated using the following
equation:
Power Dissipation = I
Figure 27. Typical Topology for Driving
R
g
-
+
Capactive Loads
s
* (V
s
.
R
s
f
+ - V
L
plot were chosen to achieve maxi-
s
L
-) + (V
plot on page 8, illustrates the
R
s
s
+ - V
C
L
o(RMS)
s
R
values in the
) * I
L
OUT(RMS)
s
)
12
Where I
voltage, V
RMS output voltage and I
delivered to the load.
Follow the maximum power derating curves shown in Figure 28
below to ensure proper operation.
Overdrive Recovery
For an amplifier, an overdrive condition occurs when the output
and/or input ranges are exceeded. The recovery time varies
based on whether the input or output is overdriven and by how
much the ranges are exceeded. The FHP3130/3230/3430 will
typically recover in less than 50ns from an overdrive condition.
Figure 29 shows the FHP3230 in an overdriven condition.
Composite Video Summer
The bandwidth and differential gain/phase performance of the
FHP3130/3230/3430 amplifiers make them well suited for video
applications. Figure 30 shows a typical Composite Video Sum-
mer. The high output current capability allows for driving multi-
ple video loads. Figure 31 shows the resulting differential gain/
phase of this 3-amp configuration driving 4 video loads, 37.5Ω.
Figure 28. Maximum Power Derating
s
-0.5
3.5
3.0
2.5
2.0
1.5
1.0
0.5
is the supply current, V
s
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
- is the negative supply pin voltage, V
Figure 29. Overdrive Recovery
0
0
-40
0.2
SOIC-8
-20
Ambient Temperature (°C)
0.4
TSSOP-14
SOT23-5
0.6
OUT(RMS)
0
Time (µs)
Output
FHP3130, FHP3230, FHP3430 Rev. 1A
Input
0.8
SOIC-14
MSOP-8
20
s
10
+ is the positive supply pin
is the RMS output current
1.2
40
1.4
60
V
G = 5
R
R
s
L
f
= 1kΩ
= 3V
= 2kΩ
1.6
o(RMS)
80
1.8
is the