1
FN7459.1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
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Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2005. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.
ISL59420
400MHz Multiplexing Amplifier
The ISL59420 is a 420MHz bandwidth 2:1 multiplexing
amplifier designed primarily for video switching. This
Mux-amp has user-settable gain and also feature a high
speed three-state function to enable the output of multiple
devices to be wired together. All logic inputs have pull-downs
to ground and may be left floating. The ENABLE pin, when
pulled high, sets the ISL59420 to the low current power-down
mode for power sensitive applications - consuming just 5mW.
Functional Diagram
Features
420MHz (-3dB) Bandwidth (A
V
= 1, V
OUT
= 400mV
P-P
)
165MHz (-3dB) Bandwidth (A
V
= 2, V
OUT
= 2V
P-P
)
Slew Rate (A
V
= 1, R
L
= 500
,
V
OUT
= 4V) . . . . . .966V/s
Slew Rate (A
V
= 2, R
L
= 500
,
V
OUT
= 5V) . . . . .1462V/s
Selectable Gain
High Speed Three-State Output (HIZ)
Low Current Power-Down . . . . . . . . . . . . . . . . . . . . .5mW
Pb-Free Plus Anneal Available (RoHS Compliant)
Applications
HDTV/DTV Analog Inputs
Video Projectors
Computer Monitors
Set-Top Boxes
Security Video
Broadcast Video Equipment
TABLE 1. CHANNEL SELECT LOGIC TABLE
S0
ENABLE
HIZ
OUTPUT
0
0
0
IN0
1
0
0
IN1
X
1
X
Power Down
X
0
1
High Z
Pinout
ISL59420
(10 LD MSOP)
TOP VIEW
1
2
3
4
10
9
8
7
5
6
S0
GND
IN0
ENABLE
IN1
IN-
OUT
V+
V-
HIZ
-
+
OUT
DECODE
IN0
IN1
S0
ENABLE
EN0
EN1
HIZ
AMPLIFIER BIAS
+
-
IN-
ENABLE pin must be low in order to activate the HIZ state
Ordering Information
PART NUMBER
PART
MARKING
PACKAGE
TAPE &
REEL
PKG.
DWG. #
ISL59420IU
BBNAA
10 Ld MSOP
-
MDP0043
ISL59420IU-T7
BBNAA
10 Ld MSOP
7"
MDP0043
ISL59420IU-T13
BBNAA
10 Ld MSOP
13"
MDP0043
ISL59420IUZ
(Note)
BBPAA
10 Ld MSOP
(Pb-free)
-
MDP0043
ISL59420IUZ-T7
(Note)
BBPAA
10 Ld MSOP
(Pb-free)
7"
MDP0043
ISL59420IUZ-T13
(Note)
BBPAA
10 Ld MSOP
(Pb-free)
13"
MDP0043
NOTE: Intersil Pb-free plus anneal products employ special Pb-free
material sets; molding compounds/die attach materials and 100%
matte tin plate termination finish, which are RoHS compliant and
compatible with both SnPb and Pb-free soldering operations. Intersil
Pb-free products are MSL classified at Pb-free peak reflow
temperatures that meet or exceed the Pb-free requirements of
IPC/JEDEC J STD-020.
Data Sheet
September 22, 2005
2
FN7459.1
September 22, 2005
Absolute Maximum Ratings
(T
A
= 25C)
Supply Voltage (V+ to V-). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11V
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . V- -0.5V, V+ +0.5V
Supply Turn-on Slew Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . 1V/
s
IN- Input Current (Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5mA
Digital & Analog Input Current (Note 1) . . . . . . . . . . . . . . . . . . 50mA
Output Current (Continuous) . . . . . . . . . . . . . . . . . . . . . . . . . . 50mA
ESD Rating
Human Body Model (Per MIL-STD-883 Method 3015.7). . . . 2.5kV
Machine Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .300V
Storage Temperature Range . . . . . . . . . . . . . . . . . .-65C to +150C
Ambient Operating Temperature . . . . . . . . . . . . . . . .-40C to +85C
Operating Junction Temperature . . . . . . . . . . . . . . .-40C to +125C
Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Curves
JA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Curves
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.
NOTE:
1. If an input signal is applied before the supplies are powered up, the input current must be limited to these maximum values.
IMPORTANT NOTE: All parameters having Min/Max specifications are guaranteed. Typical values are for information purposes only. Unless otherwise noted, all tests
are at the specified temperature and are pulsed tests, therefore: T
J
= T
C
= T
A
Electrical Specifications
V+ = +5V, V- = -5V, GND = 0V, T
A
= 25C, R
L
= 500
to GND unless otherwise specified.
PARAMETER
DESCRIPTION
CONDITIONS
MIN
TYP
MAX
UNIT
GENERAL
I
S
Enabled
Supply Current
No load, V
IN
= 0V, ENABLE
Low
9.5
11
13
mA
I
S
Disabled
Disabled Supply Current I+
No load, V
IN
= 0V, ENABLE
High
0.5
1
1.5
mA
Disabled Supply Current I-
No load, V
IN
= 0V, ENABLE
High
3
10
A
V
OUT
Positive Output Swing
V
IN
= 2V, R
L
= 500
, A
V
= 2
3.5
3.9
V
Negative Output Swing
V
IN
= -2V, R
L
= 500
, A
V
= 2
-3
-2.8
V
I
OUT
Output Current
R
L
= 10
to GND
80
130
mA
V
OS
Output Offset Voltage
-12
4
+12
mV
Ib+
Input Bias Current
V
IN
= 0V
-4
-2.5
-1.5
A
Ib-
Feedback Bias Current
-15
7
15
A
R
out
Output Resistance
HIZ = logic high, (DC), A
V
= 1
1.4
M
HIZ = logic low, (DC), A
V
= 1
0.2
R
IN
Input Resistance
V
IN
= 3.5V
10
M
A
CL
or A
V
Voltage Gain
R
F
= R
G
= 600
, V
OUT
=
3V
1.990
2.005
2.020
V/V
I
TRI
Output Current in Three-state
V
OUT
= 0V
-20
6
20
A
LOGIC
V
H
Input High Voltage (Logic Inputs)
2
V
V
L
Input Low Voltage (Logic Inputs)
0.8
V
I
IH
Input High Current (Logic Inputs)
55
90
135
A
I
IL
Input Low Current (Logic Inputs)
-10
0
10
A
AC GENERAL
- 3dB BW
-3dB Bandwidth
A
V
= 1, R
F
= 200
, V
OUT
= 400MV
P-P
,
C
L
= 5.5pF, C
G
= 0.6pF
420
MHz
A
V
= 2, R
F
= R
G
= 453
, V
OUT
= 2V
P-P
,
C
L
= 5.5pF, C
G
= 0.6pF
165
MHz
ISL59420
3
FN7459.1
September 22, 2005
0.1dB BW
0.1dB Bandwidth
A
V
= 1, R
F
= 200
, V
OUT
= 100mV
P-P
,
C
L
= 5.5pF, C
G
= 0.6pF
25
MHz
A
V
= 2, R
F
= R
G
= 453
, V
OUT
= 2V
P-P
,
C
L
= 5.5pF, C
G
= 0.6pF
60
MHz
dG
Differential Gain Error
NTC-7, R
L
= 150, C
L
= 5.5pF, A
V
= 1
0.01
%
NTC-7, R
L
= 150, C
L
= 5.5pF, A
V
= 2
0.05
%
dP
Differential Phase Error
NTC-7, R
L
= 150, C
L
= 5.5pF, A
V
= 1
0.02
NTC-7, R
L
= 150, C
L
= 5.5pF, A
V
= 2
0.02
+SR
Slew Rate
25% to 75%, A
V
= 1, V
OUT
= 4V, R
L
= 500
,
C
L
= 5.5pF
966
V/
s
25% to 75%, A
V
= 2, V
OUT
= 5V, R
L
= 500
,
C
L
= 5.5pF
1462
V/
s
-SR
Slew Rate
25% to 75%, A
V
= 1, V
OUT
= 4V, R
L
= 500
,
C
L
= 5.5pF
788
V/
s
25% to 75%, A
V
= 2, V
OUT
= 5V, R
L
= 500
,
C
L
= 5.5pF
1171
V/
s
PSRR
Power Supply Rejection Ratio
DC, PSRR V+ and V- combined
-60
-68
dB
ISO
Channel Isolation
f = 10MHz, Ch-Ch X-Talk and Off Isolation,
C
L
= 5.5pF
75
dB
SWITCHING CHARACTERISTICS
V
GLITCH
Channel-to-Channel Switching Glitch
V
IN
= 0V, C
L
= 5.5pF, A
V
= 2
36
mV
P-P
ENABLE Switching Glitch
V
IN
= 0V, C
L
= 5.5pF, A
V
= 2
475
mV
P-P
HIZ Switching Glitch
V
IN
= 0V, C
L
= 5.5pF, A
V
= 2
360
mV
P-P
t
SW-L-H
Channel Switching Time Low to High
1.2V logic threshold to 10% movement of
analog output
24
ns
t
SW-H-L
Channel Switching Time High to Low
1.2V logic threshold to 10% movement of
analog output
19
ns
TRANSIENT RESPONSE
t
R,
t
F
Rise & Fall Time, 10% to 90%
A
V
= 1, R
F
= 200
, V
OUT
= 100mV
P-P
,
C
L
= 5.5pF, C
G
= 0.6pF
0.83
ns
A
V
= 2, R
F
= R
G
= 453
, V
OUT
= 2V
P-P
,
C
L
= 5.5pF, C
G
= 0.6pF
1.64
ns
t
S
0.1% Settling Time
A
V
= 2, R
F
= R
G
= 453
, V
OUT
= 2V
P-P
,
C
L
= 5.5pF, C
G
= 0.6pF
8.8
ns
O
S
Overshoot
A
V
= 1, R
F
= 200
, V
OUT
= 100mV
P-P
,
C
L
= 5.5pF, C
G
= 0.6pF
24
%
A
V
= 2, R
F
= R
G
= 453
, V
OUT
= 2V
P-P
,
C
L
= 5.5pF, C
G
= 0.6pF
10
%
t
PLH
Propagation Delay - Low to High,
10% to 10%
A
V
= 1, R
F
= 200
, V
OUT
= 100mV
P-P
,
C
L
= 5.5pF, C
G
= 0.6pF
0.5
ns
A
V
= 2, R
F
= R
G
= 453
, V
OUT
= 2V
P-P
,
C
L
= 5.5pF, C
G
= 0.6pF
1.01
ns
t
PHL
Propagation Delay- High to Low,
10% to 10%
A
V
= 1, R
F
= 200
, V
OUT
= 100mV
P-P
,
C
L
= 5.5pF, C
G
= 0.6pF
0.65
ns
A
V
= 2, R
F
= R
G
= 453
, V
OUT
= 2V
P-P
,
C
L
= 5.5pF, C
G
= 0.6pF
1.08
ns
Electrical Specifications
V+ = +5V, V- = -5V, GND = 0V, T
A
= 25C, R
L
= 500
to GND unless otherwise specified. (Continued)
PARAMETER
DESCRIPTION
CONDITIONS
MIN
TYP
MAX
UNIT
ISL59420
4
FN7459.1
September 22, 2005
Typical Performance Curves
V
S
= 5V, R
L
= 500
to GND, T
A
= 25C, unless otherwise specified.
FIGURE 1. SMALL SIGNAL GAIN vs FREQUENCY vs C
L
FIGURE 2. SMALL SIGNAL GAIN vs FREQUENCY vs R
L
FIGURE 3. LARGE SIGNAL GAIN vs FREQUENCY vs C
L
FIGURE 4. LARGE SIGNAL GAIN vs FREQUENCY vs R
L
FIGURE 5. SMALL SIGNAL 0.1dB GAIN vs FREQUENCY vs C
L
FIGURE 6. SMALL SIGNAL 0.1dB GAIN vs FREQUENCY vs R
L
1
10
100
1000
FREQUENCY (MHz)
NORMA
L
IZED GAIN (dB)
C
L
= 7.2pF
C
L
= 1.6pF
A
V
= 1
C
L
= 5.5pF
C
L
INCLUDES 1.6pF
BOARD CAPACITANCE
C
L
= 9.7pF
V
OUT
= 100mV
P-P
-5
-4
-3
-2
-1
0
1
2
3
4
5
R
F
= 200
-5
-4
-3
-2
-1
0
1
2
3
4
5
1
10
100
FREQUENCY (MHz)
NORMA
L
IZED GAIN (dB)
R
L
= 1k
R
L
= 150
A
V
= 1
V
OUT
= 100mV
P-P
R
L
= 500
1000
R
L
= 75
C
L
= 5.5pF
R
F
= 200
1
10
100
1000
FREQUENCY (MHz)
NORMALIZED GAIN
(
d
B)
C
L
= 1.6pF
C
L
INCLUDES 1.6pF
BOARD CAPACITANCE
C
L
= 9.7pF
-5
-4
-3
-2
-1
0
1
2
3
4
5
A
V
= 2
V
OUT
= 2V
P-P
R
G
= R
F
= 453
C
L
= 5.5pF
C
L
= 7.2pF
-5
-4
-3
-2
-1
0
1
2
3
4
5
1
10
100
FREQUENCY (MHz)
NORMALIZED GAIN
(
d
B)
R
L
= 1k
R
L
= 500
1000
A
V
= 2
V
OUT
= 2V
P-P
C
L
= 5.5pF
R
G
= R
F
= 453
R
L
= 75
R
L
= 150
R
L
= 75
1
10
100
1000
FREQUENCY (MHz)
NORMALIZ
E
D
GA
IN
(dB)
C
L
= 7.2pF
C
L
= 1.6pF
A
V
= 1
C
L
= 5.5pF
C
L
INCLUDES 1.6pF
BOARD CAPACITANCE
C
L
= 9.7pF
V
OUT
= 100mV
P-P
R
F
= 200
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
1
10
100
FREQUENCY (MHz)
NORMALIZED GAIN
(dB)
R
L
= 1k
A
V
= 1
V
OUT
= 100mV
P-P
R
L
= 500
1000
R
L
= 75
C
L
= 5.5pF
R
F
= 200
R
L
= 150
ISL59420
5
FN7459.1
September 22, 2005
FIGURE 7. LARGE SIGNAL 0.1dB GAIN vs FREQUENCY vs C
L
FIGURE 8. LARGE SIGNAL 0.1dB GAIN vs FREQUENCY vs R
L
FIGURE 9. PSRR
CHANNELS
FIGURE 10. CROSSTALK
AND OFF ISOLATION
FIGURE 11. INPUT NOISE vs FREQUENCY
FIGURE 12. INPUT NOISE vs FREQUENCY
Typical Performance Curves
V
S
= 5V, R
L
= 500
to GND, T
A
= 25C, unless otherwise specified. (Continued)
1
10
100
1000
FREQUENCY (MHz)
NORMALIZ
E
D
GAIN
(dB)
C
L
= 7.2pF
C
L
= 1.6pF
C
L
= 5.5pF
C
L
INCLUDES 1.6pF
BOARD CAPACITANCE
C
L
= 9.7pF
-0.8
-0.7
-0.6
-0.5
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
A
V
= 2
V
OUT
= 2V
P-P
R
G
= R
F
= 453
-0.5
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
1
10
100
FREQUENCY (MHz)
NORMALIZ
E
D
GAIN
(dB)
R
L
= 1k
R
L
= 500
1000
R
L
= 75
A
V
= 2
V
OUT
= 2V
P-P
C
L
= 5.5pF
R
G
= R
F
= 453
R
L
= 150
FREQUENCY (MHz)
0
-10
-30
P
S
RR (dB
)
0.3
1
10
100
1000
-50
-70
PSRR (V-)
PSRR (V+)
10
-20
-40
-60
-80
20
A
V
= 2
V
IN
= 200mV
P-P
C
L
= 5.5pF
R
G
= R
F
= 453
FREQUENCY (MHz)
-20
-40
-60
(dB)
0.001
0.1
10
100
500
-80
-100
CROSSTALK
OFF ISOLATION
-30
-50
-70
-90
-110
-10
1
0.01
3 6
A
V
= 2
V
IN
= 1V
P-P
C
L
= 5.5pF
R
G
= R
F
= 453
24
20
16
12
8
4
0
0.1
1
10
100
FREQUENCY (kHz)
-I
IN
CU
RRE
N
T
NOISE (p
A/
Hz
)
A
V
= 1, R
F
= 500
60
50
40
30
20
10
0
0.1
1
10
100
FREQUENCY (kHz)
I
N
PUT
VO
L
T
AGE NOI
SE (n
V/
Hz
)
A
V
= 1, R
F
= 500
ISL59420
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