H4600CB(2000) 查看數據表（PDF） - Intersil
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H4600CB Datasheet PDF : 7 Pages
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HA4600
Electrical Specifications VSUPPLY = ±5V, RL = 10kΩ, VEN = 2.0V, Unless Otherwise Specified (Continued)
PARAMETER
TEST CONDITIONS
TEMP. (oC)
MIN
TYP
±0.1dB Flat Bandwidth
Input Resistance
RS = 82Ω, CL = 10pF
RS = 43Ω, CL = 15pF
RS = 36Ω, CL = 21pF
25
-
250
25
-
175
25
-
170
Full
200
400
Input Capacitance
Full
-
1.0
Enabled Output Resistance
Full
-
15
Disabled Output Capacitance
Differential Gain (Note 3)
VEN = 0.8V
4.43MHz
Full
-
2.0
25
-
0.01
Differential Phase (Note 3)
4.43MHz
25
-
0.01
Off Isolation
Slew Rate (1.5VP-P, +SR/-SR)
Total Harmonic Distortion (Note 3)
1VP-P, 100MHz,
Full
-
85
VEN = 0.8V, RL = 10Ω
RS = 82Ω, CL = 10pF
25
-
1750/1770
RS = 43Ω, CL = 15pF
25
-
1460/1360
RS = 36Ω, CL = 21pF
25
-
1410/1360
Full
-
0.01
Disabled Output Resistance
Full
-
12
NOTE:
3. This parameter is not tested. The limits are guaranteed based on lab characterization, and reflect lot-to-lot variation.
MAX
-
-
-
-
-
-
-
0.02
0.02
-
-
-
-
0.1
-
UNITS
MHz
MHz
MHz
kΩ
pF
Ω
pF
%
Degrees
dB
V/µs
V/µs
V/µs
%
MΩ
AC Test Circuit
VIN
75Ω
HA4600
500Ω 400Ω
RS
510Ω
-
75Ω
+
HFA1100
CX 10kΩ
VOUT
NOTE: CL = CX + Test Fixture Capacitance.
PC Board Layout
The frequency response of this circuit depends greatly on the
care taken in designing the PC board. The use of low
inductance components such as chip resistors and chip
capacitors is strongly recommended, while a solid ground
plane is a must!
Attention should be given to decoupling the power supplies.
A large value (10µF) tantalum in parallel with a small value
(0.1µF) chip capacitor works well in most cases.
Keep input and output traces as short as possible, because
trace inductance and capacitance can easily become the
performance limiting items.
3-3
Application Information
General
The HA4600 is a unity gain buffer that is optimized for high
performance video applications. The output disable function
makes it ideal for the matrix element in small, high input-to-
output isolation switchers and routers. This buffer contains no
feedback or gain setting resistors, so the output is a true high
impedance load when the IC is disabled (EN = 0). The HA4600
also excels as an input buffer for routers with a large number of
outputs (i.e. each input must connect to a large number of
outputs) and delivers performance superior to most video
amplifiers at a fraction of the cost. As an input buffer, the
HA4600’s low input capacitance and high input resistance
provide excellent video terminations when used with an
external 75Ω resistor.
Frequency Response
Most applications utilizing the HA4600 require a series
output resistor, RS, to tune the response for the specific load
capacitance, CL, driven. Bandwidth and slew rate degrade
as CL increases (as shown in the Electrical Specification
table), so give careful consideration to component
placement to minimize trace length. As an example, -3dB
bandwidth decreases to 160MHz for CL = 100pF, RS = 0Ω.
In big matrix configurations where CL is large, better
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