HA4314B Datasheet, PDF (3/10 Pages) Intersil Corporation – 400MHz, 4 x 1 Video Crosspoint Switch

HA4314B
Electrical Specifications V_SUPPLY = ±5V, R_L = 10kΩ, V_CS = 0.8V, Unless Otherwise Specified (Continued)
PARAMETER
(NOTE 4)
TEST CONDITIONS
TEMP. (^oC)
MIN
TYP
±0.1dB Flat Bandwidth
Input Resistance
R_S = 50Ω, C_L = 10pF
R_S = 20Ω, C_L = 20pF
R_S = 16Ω, C_L = 36pF
R_S = 13Ω, C_L = 49pF
25
-
100
25
-
100
25
-
85
25
-
75
Full
200
400
Input Capacitance
Full
-
1.5
Enabled Output Resistance
Full
-
15
Disabled Output Capacitance
Differential Gain
V_CS = 2.0V
4.43MHz, Note 3
Full
-
2.5
25
-
0.01
Differential Phase
4.43MHz, Note 3
25
-
0.01
Off Isolation
Crosstalk Rejection
Slew Rate (1.5V_P-P, +SR/-SR)
Total Harmonic Distortion
Disabled Output Resistance
NOTES:
1V_P-P, 100MHz, V_CS = 2.0V,
Full
R_L = 10Ω
1V_P-P, 30MHz
Full
R_S = 50Ω, C_L = 10pF
25
R_S = 20Ω, C_L = 20pF
25
R_S = 16Ω, C_L = 36pF
25
R_S = 13Ω, C_L = 49pF
25
10MHz, R_L = 1kΩ, Note 3
Full
V_CS = 2.0V
Full
-
70
-
80
-
1425/1450
-
1010/1010
-
725/750
-
600/650
-
0.01
-
12
3. This parameter is not tested. The limits are guaranteed based on lab characterization, and reflect lot-to-lot variation.
4. Units are 100% tested at 25^oC; Guaranteed but not tested at 0^oC and 70^oC.
MAX
-
-
-
-
-
-
-
-
0.02
0.02
-
-
-
-
-
-
0.1
-
UNITS
MHz
MHz
MHz
MHz
kΩ
pF
Ω
pF
%
Degrees
dB
dB
V/µs
V/µs
V/µs
V/µs
%
MΩ
AC Test Circuit
500Ω
400Ω 510Ω
HA4314
R_S
V_IN
75Ω
C_X
-
+
10kΩ
75Ω
HFA1100
V_OUT
NOTE: C_L = C_X + 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.
Application Information
General
The HA4314B is a 4 x 1 crosspoint switch that is ideal for the
matrix element of high performance switchers and routers.
This crosspoint’s low input capacitance and high input
resistance provide excellent video terminations when used
with an external 75Ω resistor. Nevertheless, if several
HA4314B inputs are connected together, the use of an input
buffer should be considered (see Figure 1). This crosspoint
contains no feedback or gain setting resistors, so the output
is a true high impedance load when the IC is disabled
(CS = 1).
Ground Connections
All GND pins are connected to a common point on the die,
so any one of them will suffice as the functional GND
connection. For the best isolation and crosstalk rejection,
however, all GND pins must connect to the GND plane.
Frequency Response
Most applications utilizing the HA4314B require a series
output resistor, R_S, to tune the response for the specific load
3