Maximum Junction Temperature (Plastic Package) . . . . . . . 150°C
Maximum Storage Temperature Range . . . . . . . . . -65°C to 150°C
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . 300°C
(SOIC and SOT-23 - Lead Tips Only)
*Pb-free PDIPs can be used for through hole wave solder processing
only. They are not intended for use in Reflow solder processing
applications.
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTES:
1.
θ
JA
is measured with the component mounted on an evaluation PC board in free air.
2. If an input signal is applied before the supplies are powered up, the input current must be limited to this maximum value.
Electrical Specifications
V
SUPPLY
=
±5V,
R
L
= 10kΩ, V
EN
= 2.0V, Unless Otherwise Specified
PARAMETER
DC SUPPLY CHARACTERISTICS
Supply Voltage
Supply Current (V
OUT
= 0V)
V
EN
= 2V
V
EN
= 2V
V
EN
= 0.8V
V
EN
= 0.8V
ANALOG DC CHARACTERISTICS
Output Voltage Swing without Clipping
V
OUT
= V
IN
±
V
IO
±
20mV
25, 70
0
Output Current
Input Bias Current
Output Offset Voltage
Output Offset Voltage Drift (Note 3)
SWITCHING CHARACTERISTICS
Turn-On Time
Turn-Off Time
DIGITAL DC CHARACTERISTICS
Input Logic High Voltage
Input Logic Low Voltage
EN Input Current
AC CHARACTERISTICS
Insertion Loss
1V
P-P
Full
-
0.04
0.05
dB
0V to 4V
Full
Full
Full
2
-
-2
-
-
-
-
0.8
2
V
V
µA
25
25
-
-
160
320
-
-
ns
ns
Full
Full
25
Full
±2.7
±2.4
15
-
-10
-
±2.8
±2.5
20
30
-
25
-
-
-
50
10
50
V
V
mA
µA
mV
µV/°C
Full
25, 70
0
25, 70
0
±4.5
-
-
-
-
±5.0
10.5
-
100
100
±5.5
13
14.5
115
125
V
mA
mA
µA
µA
TEST CONDITIONS
TEMP. (°C)
MIN
TYP
MAX
UNITS
2
FN3990.8
December 22, 2005
HA4600
Electrical Specifications
V
SUPPLY
=
±5V,
R
L
= 10kΩ, V
EN
= 2.0V, Unless Otherwise Specified
(Continued)
PARAMETER
-3dB Bandwidth
TEST CONDITIONS
R
S
= 82Ω, C
L
= 10pF
R
S
= 43Ω, C
L
= 15pF
R
S
= 36Ω, C
L
= 21pF
±0.1dB
Flat Bandwidth
R
S
= 82Ω, C
L
= 10pF
R
S
= 43Ω, C
L
= 15pF
R
S
= 36Ω, C
L
= 21pF
Input Resistance
Input Capacitance
Enabled Output Resistance
Disabled Output Capacitance
Differential Gain (Note 3)
Differential Phase (Note 3)
Off Isolation
V
EN
= 0.8V
4.43MHz
4.43MHz
1V
P-P
, 100MHz,
V
EN
= 0.8V, R
L
= 10Ω
R
S
= 82Ω, C
L
= 10pF
R
S
= 43Ω, C
L
= 15pF
R
S
= 36Ω, C
L
= 21pF
Total Harmonic Distortion (Note 3)
Disabled Output Resistance
NOTE:
3. This parameter is not tested. The limits are guaranteed based on lab characterization, and reflect lot-to-lot variation.
TEMP. (°C)
25
25
25
25
25
25
Full
Full
Full
Full
25
25
Full
MIN
-
-
-
-
-
-
200
-
-
-
-
-
-
TYP
480
380
370
250
175
170
400
1.0
15
2.0
0.01
0.01
85
MAX
-
-
-
-
-
-
-
-
-
-
0.02
0.02
-
UNITS
MHz
MHz
MHz
MHz
MHz
MHz
kΩ
pF
Ω
pF
%
Degrees
dB
Slew Rate (1.5V
P-P
, +SR/-SR)
25
25
25
Full
Full
-
-
-
-
-
1750/1770
1460/1360
1410/1360
0.01
12
-
-
-
0.1
-
V/µs
V/µs
V/µs
%
MΩ
AC Test Circuit
400Ω
510Ω
+
C
X
10kΩ
Keep input and output traces as short as possible, because
trace inductance and capacitance can easily become the
performance limiting items.
500Ω
HA4600
V
IN
75Ω
R
S
-
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.
3
FN3990.8
December 22, 2005
HA4600
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.
latch-up, the input currents during power up must not exceed
the values listed in the Absolute Maximum Ratings.
Intersil’s Crosspoint Family
Intersil offers a variety of 1 x 1 and 4 x 1 crosspoint switches. In
addition to the HA4600, the 1 x 1 family includes the HA4201
which is an essentially similar device that includes a Tally
output (enable indicator). The 4 x 1 family is comprised of the
HA4314, HA4404, and HA4344. The HA4314 is a 14 lead basic
4 x 1 crosspoint. The HA4404 is a 16 lead device with Tally
outputs to indicate the selected channel. The HA4344 is a 16
lead crosspoint with synchronized control lines (A0, A1, CS).
With synchronization, the control information for the next
channel switch can be loaded into the crosspoint without
affecting the current state. On a subsequent clock edge the
stored control state effects the desired channel switch.
Frequency Response
Most applications utilizing the HA4600 require a series
output resistor, R
S
, to tune the response for the specific load
capacitance, C
L
, driven. Bandwidth and slew rate degrade
as C
L
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 C
L
= 100pF, R
S
= 0Ω.
In big matrix configurations where C
L
is large, better
frequency response is obtained by cascading two levels of
crosspoints in the case of multiplexed outputs (see Figure
2), or distributing the load between two drivers if C
L
is due to
bussing and subsequent stage input capacitance.
Control Signals
EN - The ENABLE input is a TTL/CMOS compatible, active
high input. When driven low this input forces the output to a
true high impedance state and reduces the power
dissipation by two orders of magnitude. The EN input has no
on-chip pull-up resistor, so it must be connected to a logic
high (recommend V+) if the enable function isn’t utilized.
Switcher/Router Applications
Figure 1 illustrates one possible implementation of a
wideband, low power, 4 x 4 switcher/router. A 4 x 4
switcher/router allows any of the four outputs to be driven by
any one of the four inputs (e.g. each of the four inputs may
connect to a different output, or an input may connect to
multiple outputs). This application utilizes the HA4600 for the
input buffer, the HA4404 (4 x 1 crosspoint switch) as the
switch matrix, and the HFA1112 (programmable gain buffer)
as the gain of two output driver. Figure 2 details a 16 x 1
switcher (basically a 16:1 MUX) which uses the HA4600 in a
cascaded stage configuration to minimize capacitive loading
at each output node, thus increasing system bandwidth.
Power Up Considerations
No signals should be applied to the analog or digital inputs
before the power supplies are activated. Latch-up may occur
if the inputs are driven at the time of power up. To prevent
