EL8108ISZ [INTERSIL]
Video Distribution Amplifier; 视频分配放大器
| 型号： | EL8108ISZ |
| 厂家： | 
Intersil |
| 描述： | Video Distribution Amplifier |
| 文件： | 总14页 (文件大小：281K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
EL8108
®
Data Sheet
January 29, 2008
FN7417.2
Video Distribution Amplifier
Features
The EL8108 is a dual current feedback
operational amplifier designed for
video distribution solutions. This
• Drives up to 450mA from a +12V supply
• 20V differential output drive into 100Ω
P-P
• -85dBc typical driver output distortion at full output at
150kHz
device features a high drive capability of 450mA while
consuming only 5mA of supply current per amplifier and
operating from a single 5V to 12V supply.
• -70dBc typical driver output distortion at 3.75MHz
• Low quiescent current of 5mA per amplifier
• 300MHz bandwidth
The EL8108 is available in the industry standard 8 Ld SOIC
as well as the thermally-enhanced 16 Ld QFN package. Both
are specified for operation over the full -40°C to +85°C
temperature range. The EL8108 has control pins C0 and C1
for controlling the bias and enable/disable of the outputs.
• Pb-free available (RoHS compliant)
Applications
The EL8108 is ideal for driving multiple video loads while
maintaining linearity.
• Video distribution amplifiers
TABLE 1.
Pinouts
EL8108
(8 LD SOIC)
TOP VIEW
150Ω
150Ω
DIFF GAIN
0.03
DIFF PHASE
0.01
1
1
2
2
3
3
2
3
4
5
6
0
1
1
2
2
3
0
0
0
0
0
0.03
0.01
OUTA
INA-
1
2
3
4
8
7
6
5
VS
0.05
0.02
0.06
0.03
-
+
OUTB
INB-
INB+
0.08
0.03
INA+
GND
0.11
0.03
-
+
0.04
0.01
0.05
0.02
0.07
0.02
EL8108
(16 LD QFN)
TOP VIEW
0.08
0.03
0.10
0.03
NC
INA-
INA+
GND
1
2
3
4
12 NC
AMP A
-
+
AMP B
-
+
11 INB-
10 INB+
POWER
CONTROL
LOGIC
9
C1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
1
Copyright © Intersil Americas Inc. 2007, 2008. All Rights Reserved. Elantec is a registered trademark of Elantec Semiconductor, Inc.
All other trademarks mentioned are the property of their respective owners.
EL8108
Ordering Information
TEMPERATURE RANGE
(°c)
PART NUMBER
PART MARKING
8108IS
8108IS
PACKAGE
8 Ld SOIC
PKG. DWG. #
MDP0027
EL8108IS
-40 to +85
-40 to +85
-40 to +85
-40 to +85
EL8108IS-T7*
EL8108IS-T13*
EL8108ISZ (Note)
8 Ld SOIC
8 Ld SOIC
MDP0027
MDP0027
MDP0027
8108IS
8108ISZ
8 Ld SOIC
(Pb-free)
EL8108ISZ-T7* (Note)
EL8108ISZ-T13* (Note)
8108ISZ
8108ISZ
-40 to +85
-40 to +85
8 Ld SOIC
(Pb-free)
MDP0027
MDP0027
8 Ld SOIC
(Pb-free)
EL8108IL
8108IL
8108IL
8108IL
8108ILZ
-40 to +85
-40 to +85
-40 to +85
-40 to +85
16 Ld 4x4 QFN
16 Ld 4x4 QFN
16 Ld 4x4 QFN
MDP0046
MDP0046
MDP0046
MDP0046
EL8108IL-T7*
EL8108IL-T13*
EL8108ILZ
(Note)
16 Ld 4x4 QFN
(Pb-free)
EL8108ILZ-T7*
(Note)
8108ILZ
8108ILZ
-40 to +85
-40 to +85
16 Ld 4x4 QFN
(Pb-free)
MDP0046
MDP0046
EL8108ILZ-T13*
(Note)
16 Ld 4x4 QFN
(Pb-free)
* Please refer to TB347 for details on reel specifications.
NOTE: These Intersil Pb-free plastic packaged products employ special Pb-free material sets; molding compounds/die attach materials and 100%
matte tin plate PLUS ANNEAL - e3 termination finish, which is 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.
FN7417.2
January 29, 2008
2
EL8108
Absolute Maximum Ratings (T = +25°C)
Thermal Information
A
V + Voltage to Ground . . . . . . . . . . . . . . . . . . . . . . -0.3V to +13.2V
Ambient Operating Temperature Range . . . . . . . . . .-40°C to +85°C
Storage Temperature Range . . . . . . . . . . . . . . . . . .-60°C to +150°C
Operating Junction Temperature . . . . . . . . . . . . . . . . . . . . . . +150°C
Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Curves
Pb-free Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . . .see link below
http://www.intersil.com/pbfree/Pb-FreeReflow.asp
S
V
+ Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GND to V +
IN
S
Current into any Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8mA
Continuous Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . 75mA
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and
result in failures not covered by warranty.
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 = T = T
A
J
C
Electrical Specifications
PARAMETER
V = 12V, R = 750Ω, R = 100Ω connected to mid supply, T = +25°C, unless otherwise specified.
S F L A
DESCRIPTION
CONDITIONS
MIN
TYP
MAX
UNIT
AC PERFORMANCE
BW
HD
-3dB Bandwidth
R
R
= 500Ω, A = +2
200
150
-83
-70
-60
-50
800
MHz
MHz
dBc
dBc
dBc
dBc
V/µs
F
V
= 500Ω, A = +4
F
V
Total Harmonic Distortion, Differential
f = 200kHz, V = 16V , R = 50Ω
P-P
-72
O
L
f = 4MHz, V = 2V , R = 100Ω
P-P
O
L
f = 8MHz, V = 2V , R = 100Ω
P-P
O
L
f = 16MHz, V = 2V , R = 100Ω
P-P
O
L
SR
Slew Rate, Single-ended
Offset Voltage
V
from -3V to +3V
600
1100
OUT
OUT
DC PERFORMANCE
V
-25
-3
+25
+3
mV
mV
MΩ
OS
ΔV
V
Mismatch
OS
OS
Transimpedance
INPUT CHARACTERISTICS
R
V
from -4.5V to +4.5V
0.7
1.4
2.5
OL
I +
Non-inverting Input Bias Current
Inverting Input Bias Current
-5
5
µA
µA
µA
B
I -
-20
-18
5
0
+20
+18
B
ΔI -
I - Mismatch
B
B
e
Input Noise Voltage
-Input Noise Current
6
nV Hz
√
N
i
13
pA/ Hz
√
N
OUTPUT CHARACTERISTICS
V
Loaded Output Swing (Single-ended)
V
V
= ±6V, R = 100Ω to GND
±4.8
±5
V
V
OUT
S
S
L
= ±6V, R = 25Ω to GND
±4.7
450
L
I
Output Current
R
= 0Ω
mA
OUT
L
SUPPLY
V
Supply Voltage
Single supply
4.5
11
13
18
V
S
I
(EL8108IS only) Supply Current, Maximum Setting
All outputs at mid supply
14.3
mA
S
SUPPLY (EL8108IL ONLY)
I + (Full Power) Positive Supply Current per Amplifier
I + (Medium Power) Positive Supply Current per Amplifier
All outputs at 0V, C = C = 0V
11
7
14.3
8.9
18
11
mA
mA
mA
mA
µA
S
0
1
All outputs at 0V, C = 5V, C = 0V
S
0
1
I + (Low Power)
Positive Supply Current per Amplifier
Positive Supply Current per Amplifier
All outputs at 0V, C = 0V, C = 5V
3.7
4.5
5.5
0.5
160
+5
S
0
1
I + (Power Down)
All outputs at 0V, C = C = 5V
0.1
S
0
1
I
I
, C or C
INH
C , C Input Current, High
C , C = 5V
90
-5
125
0
1
0
1
0
1
, C or C
INL
C , C Input Current, Low
C , C = 0V
µA
0
1
0
1
0
1
FN7417.2
January 29, 2008
3
EL8108
Typical Performance Curves
22
22
20
18
16
14
12
10
8
V
R
= ±6V, A = 5
V
= 100Ω DIFF
V
R
= ±6V, A = 5
S V
S
20
18
16
14
12
10
8
= 100Ω DIFF
L
L
R
= 243Ω
F
R
= 243Ω
F
R
= 500Ω
F
R
= 500Ω
F
R
= 750Ω
F
R
= 750Ω
F
R
= 1kΩ
R
= 1kΩ
F
F
6
6
4
4
2
2
500M
500M
10M
FREQUENCY (Hz)
100M
10M
100M
100k
100k
1M
1M
FREQUENCY (Hz)
FIGURE 1. DIFFERENTIAL FREQUENCY RESPONSE WITH
VARIOUS R (FULL POWER MODE)
FIGURE 2. DIFFERENTIAL FREQUENCY RESPONSE WITH
VARIOUS R (3/4 POWER MODE)
F
F
22
20
18
16
14
12
10
8
28
26
24
22
20
18
16
14
12
10
8
V
R
= ±6V, A = 5
V
= 100Ω DIFF
V
R
= ±6V, A = 10
S V
S
= 100Ω DIFF
L
L
RF = 500Ω
RF = 750Ω
R
= 243Ω
F
RF = 243Ω
R
= 500Ω
F
R
= 750Ω
F
RF = 1kΩ
R
= 1kΩ
F
6
4
2
500M
500M
10M
100M
10M
FREQUENCY (Hz)
100M
100k
100k
1M
1M
FREQUENCY (Hz)
FIGURE 3. DIFFERENTIAL FREQUENCY RESPONSE WITH
VARIOUS R (1/2 POWER MODE)
FIGURE 4. DIFFERENTIAL FREQUENCY RESPONSE WITH
VARIOUS R (FULL POWER MODE)
F
F
28
26
24
22
20
18
16
14
12
10
8
28
26
24
22
20
18
16
14
12
10
8
V
R
= ±6V, A = 10
V
= 100Ω DIFF
V
R
= ±6V, A = 10
S V
S
= 100Ω DIFF
L
L
R = 500Ω
F
R
= 243Ω
F
R
= 750Ω
F
R
= 500Ω
F
R
= 243Ω
F
R
= 750Ω
F
R
= 1kΩ
F
R
= 1kΩ
F
500M
500M
10M
FREQUENCY (Hz)
100M
10M
FREQUENCY (Hz)
100M
100k
100k
1M
1M
FIGURE 5. DIFFERENTIAL FREQUENCY RESPONSE WITH
FIGURE 6. DIFFERENTIAL FREQUENCY RESPONSE WITH
VARIOUS R (1/2 POWER MODE)
VARIOUS R (3/4 POWER MODE)
F
F
FN7417.2
January 29, 2008
4
EL8108
Typical Performance Curves (Continued)
V
= ±6V
= 2
V
= ±6V
A = 2
V
S
S
14
12
10
8
8
6
A
V
R
= 100Ω DIFF
R
= 500Ω
L
F
R
F
= 248Ω
F
4
R
= 500Ω
2
R
= 150Ω
L
6
0
4
-2
-4
-6
-8
R
= 1kΩ
R
= 25Ω
= 50Ω
F
L
2
R
= 750Ω
F
0
R
L
-2
100k
1M
10M
FREQUENCY (Hz)
100M
500M
100k
1M
10M
FREQUENCY (Hz)
100M
500M
FIGURE 7. DIFFERENTIAL FREQUENCY RESPONSE WITH
FIGURE 8. FREQUENCY RESPONSE FOR VARIOUS R
LOAD
VARIOUS R
F
-50
-55
-60
-65
-70
-75
-80
-85
-50
V
= ±6V
= 5
V
= ±6V
S
= 5
S
EL8108IL
EL8108IS
EL8108IL
EL8108IS
A
A
V
V
-55
-60
-65
-70
-75
-80
R
R
= 50Ω DIFF
= 750
R
R
= 50Ω DIFF
= 750
L
F
L
F
3rd HD
3rd HD
2nd HD
2nd HD
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
V
(V)
V
(V)
OP-P
OP-P
FIGURE 9. DISTORTION BETWEEN EL8108IL vs EL8108IS
AT 2MHz
FIGURE 10. DISTORTION BETWEEN EL8108IL vs EL8108IS
AT 3MHz
-40
-40
V
= ±6V
= 5
V
= ±6V
S
= 5
S
EL8108IL
EL8108IS
EL8108IL
EL8108IS
A
A
V
V
-45
-50
-55
-60
-65
-70
-75
R
R
= 50Ω DIFF
= 750
R
R
= 50Ω DIFF
= 750
L
F
L
F
-45
-50
-55
-60
-65
3rd HD
3rd HD
2nd HD
2nd HD
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
V
(V)
V
(V)
OP-P
OP-P
FIGURE 11. DISTORTION BETWEEN EL8108IL vs EL8108IS
AT 5MHz
FIGURE 12. DISTORTION BETWEEN EL8108IL vs EL8108IS
AT 10MHz
FN7417.2
January 29, 2008
5
EL8108
Typical Performance Curves (Continued)
-70
-60
-65
-70
-75
-80
-85
-90
V
= ±6V
= 5
V
= ±6V
A = 5
V
S
S
A
V
-75
-80
R
= 750
R
= 750
F
F
V
= 4V
V
= 4V
OP-P
OP-P
2nd HD
-85
3rd HD
3rd HD
-90
2nd HD
-95
-100
50
60
70
80
90 100 110 120 130 140 150
50
60
70
80
90 100 110 120 130 140 150
(Ω)
R
(Ω)
R
LOAD
LOAD
FIGURE 13. 2nd AND 3rd HARMONIC DISTORTION vs R
@ 2MHz (EL8108IL)
FIGURE 14. 2nd AND 3rd HARMONIC DISTORTION vs R
@ 3MHz (EL8108IL)
LOAD
LOAD
-50
-40
V
= ±6V
= 5
V
= ±6V
= 5
S
S
A
A
-55
-60
-65
-70
-75
-80
-85
-90
-45
-50
-55
-60
-65
-70
-75
-80
V
V
R
= 750
R
= 750
F
F
V
= 4V
V
= 4V
OP-P
OP-P
3rd HD
3rd HD
2nd HD
80
2nd HD
80
50
60
70
90 100 110 120 130 140 150
(Ω)
50
60
70
90 100 110 120 130 140 150
(Ω)
R
R
LOAD
LOAD
FIGURE 15. 2nd AND 3rd HARMONIC DISTORTION vs R
@ 5MHz (EL8108IL)
FIGURE 16. 2nd AND 3rd HARMONIC DISTORTION vs R
@ 10MHz (EL8108IL)
LOAD
LOAD
24
V
= ±6V, A = 5
V
V
= ±6V, A = 5
S V
S
22
20
18
16
14
12
10
8
22
20
18
16
14
12
10
8
R
R
= 50Ω
= 750Ω
R
= 50Ω
= 750Ω
L
F
L
F
R
C
= 47pF
L
C
= 47pF
L
C
= 39pF
L
C
= 33pF
L
C
= 0pF
L
C
= 12pF
L
C
= 22pF
L
6
6
C
= 0pF
L
0
4
500M
500M
10M
100M
10M
FREQUENCY (Hz)
100M
100k
100k
1M
1M
FREQUENCY (Hz)
FIGURE 17. FREQUENCY RESPONSE WITH VARIOUS C
FIGURE 18. FREQUENCY RESPONSE vs VARIOUS C
(3/4 POWER MODE)
L
L
FN7417.2
January 29, 2008
6
EL8108
Typical Performance Curves (Continued)
24
-10
-30
V
R
R
= ±6V, A = 5
V
= 50Ω
= 750Ω
S
22
20
18
16
14
12
10
8
L
F
C
= 47pF
L
-50
C
= 37pF
L
A
B
-70
C
= 12pF
L
B
A
-90
C
= 0pF
L
6
4
-110
500M
100M
10M
FREQUENCY (Hz)
100M
1M
10M
100k
10k
1M
100k
FREQUENCY (Hz)
FIGURE 19. FREQUENCY RESPONSE WITH VARIOUS C
(1/2 POWER MODE)
FIGURE 20. CHANNEL SEPARATION vs FREQUENCY
L
-10
10M
200
3M
300k
100k
30k
10k
3k
150
100
50
-30
PSRR+
PHASE
GAIN
PSRR-
-50
0
-50
-100
-150
-200
-70
-90
1k
-110
100k
-110
1M
10M
10M
100M 200M
1k
10k
100k
1M
10M
100M
FREQUENCY (Hz)
FREQUENCY (Hz)
FIGURE 21. PSRR vs FREQUENCY
FIGURE 22. TRANSIMPEDANCE (R ) vs FREQUENCY
OL
1000
V
= ±6V, A = 1
V
S
R
= 750Ω
F
100
10
1
10
EN
1
0.1
IN-
0.01
0.1
0.001
IN+
0.0001
100M
1M
10M
10k
100k
10
100
1k
10k
100k
1M
10M
FREQUENCY (Hz)
FREQUENCY (Hz)
FIGURE 23. VOLTAGE AND CURRENT NOISE vs FREQUENCY
FIGURE 24. OUTPUT IMPEDANCE vs FREQUENCY
FN7417.2
January 29, 2008
7
EL8108
Typical Performance Curves (Continued)
150
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0
V
= ±6V
A
R
= 5, R = 750Ω,
S
V
F
130
120
110
100
90
= 100Ω DIFF
LOAD
1/2 POWER MODE
FULL POWER MODE
3/4 POWER MODE
80
3/4 POWER MODE
70
FULL POWER MODE
2
1/2 POWER MODE
60
50
3.0
3.5
4.0
4.5
5.0
5.5
6.0
1
3
4
±V (V)
S
# OF 150Ω LOADS
FIGURE 25. DIFFERENTIAL BANDWIDTH vs SUPPLY VOLTAGE
FIGURE 26. DIFFERENTIAL GAIN
16
14
12
10
8
0.09
V
= ±6V
S
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
FULL POWER MODE
3/4 POWER MODE
FULL POWER MODE
6
1/2 POWER MODE
4
3/4 POWER MODE
1/2 POWER MODE
2
+IS
-IS
0
1
2
3
4
5
6
1
2
3
4
±V (V)
# OF 150Ω LOADS
S
FIGURE 27. DIFFERENTIAL PHASE
FIGURE 28. SUPPLY CURRENT vs SUPPLY VOLTAGE
1
0
1.8k
1.7k
1.6k
1.5k
1.4k
1.3k
1.2k
IB+
-1
-2
-3
-4
IB-
-5
0
25
50
75
100
125
150
-50
-25
0
25
50
75
100
125
150
TEMPERATURE (°C)
TEMPERATURE (°C)
FIGURE 29. INPUT BIAS CURRENT vs TEMPERATURE
FIGURE 30. SLEW RATE vs TEMPERATURE
FN7417.2
January 29, 2008
8
EL8108
Typical Performance Curves (Continued)
5
3.0
2.5
2.0
1.5
1.0
0.5
0
4
3
2
1
0
-1
25
50
75
100
125
150
25
50
75
100
125
150
-50
-25
0
-50
-25
0
TEMPERATURE (°C)
TEMPERATURE (°C)
FIGURE 31. OFFSET VOLTAGE vs TEMPERATURE
FIGURE 32. TRANSIMPEDANCE vs TEMPERATURE
5.10
5.05
5.00
4.95
4.90
4.85
4.80
4.75
16.0
15.5
15.0
14.5
14.0
13.5
13.0
12.5
12.0
R
=100Ω
LOAD
V =±6V
S
25
50
75
100
125
150
25
50
75
100
125
150
-50
-25
0
-50
-25
0
TEMPERATURE (°C)
TEMPERATURE (°C)
FIGURE 33. OUTPUT VOLTAGE vs TEMPERATURE
FIGURE 34. SUPPLY CURRENT vs TEMPERATURE
3
A
= 5
V
R
R
= 750Ω
= 100Ω DIFF
F
L
2
1
0
-1
2.5
3.0
3.5
4.0
4.5
(±V)
5.0
5.5
6.0
V
S
FIGURE 35. DIFFERENTIAL PEAKING vs SUPPLY VOLTAGE
FN7417.2
January 29, 2008
9
EL8108
Typical Performance Curves (Continued)
JEDEC JESD51-7 HIGH EFFECTIVE THERMAL
CONDUCTIVITY (4-LAYER) TEST BOARD
JEDEC JESD51-3 LOW EFFECTIVE THERMAL
CONDUCTIVITY TEST BOARD
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
3.5
3.0
2.5
2.0
781mW
1.5
1.136W
1.0
0.5
0
0
25
50
75 85 100
125
150
0
25
50
75 85 100
125
150
AMBIENT TEMPERATURE (°C)
AMBIENT TEMPERATURE (°C)
FIGURE 36. PACKAGE POWER DISSIPATION vs AMBIENT
TEMPERATURE
FIGURE 37. PACKAGE POWER DISSIPATION vs AMBIENT
TEMPERATURE
JEDEC JESD51-7 HIGH EFFECTIVE THERMAL
CONDUCTIVITY TEST BOARD - LPP EXPOSED
DIEPAD SOLDERED TO PCB PER JESD51-5
JEDEC JESD51-3 LOW EFFECTIVE THERMAL
CONDUCTIVITY TEST BOARD
1.2
4.5
4.0
1.0
833mW
3.125W
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
QFN16
0.8
QFN16
θ
= +150°C/W
JA
θ
= +40°C/W
JA
0.6
0.4
0.2
0
0
25
50
75 85 100
125
150
0
25
50
75 85 100
125
150
AMBIENT TEMPERATURE (°C)
AMBIENT TEMPERATURE (°C)
FIGURE 38. PACKAGE POWER DISSIPATION vs AMBIENT
TEMPERATURE
FIGURE 39. PACKAGE POWER DISSIPATION vs AMBIENT
TEMPERATURE
Power Supply Bypassing and Printed Circuit
Board Layout
Applications Information
Product Description
As with any high frequency device, good printed circuit
board layout is necessary for optimum performance. Ground
plane construction is highly recommended. Lead lengths
should be as short as possible, below ¼”. The power supply
pins must be well bypassed to reduce the risk of oscillation.
A 4.7µF tantalum capacitor in parallel with a 0.1µF ceramic
capacitor is adequate for each supply pin.
The EL8108 is a dual current feedback operational amplifier
designed for video distribution solutions. It is a dual current
mode feedback amplifier with low distortion while drawing
moderately low supply current. It is built using Intersil’s
proprietary complimentary bipolar process and is offered in
industry standard pinouts. Due to the current feedback
architecture, the EL8108 closed-loop 3dB bandwidth is
dependent on the value of the feedback resistor. First the
desired bandwidth is selected by choosing the feedback
For good AC performance, parasitic capacitances should be
kept to a minimum, especially at the inverting input. This
implies keeping the ground plane away from this pin. Carbon
resistors are acceptable, while use of wire-wound resistors
should not be used because of their parasitic inductance.
Similarly, capacitors should be low inductance for best
performance.
resistor, R , and then the gain is set by picking the gain
F
resistor, R . The curves at the beginning of the “Typical
G
Performance Curves” on page 4 show the effect of varying
both R and R . The 3dB bandwidth is somewhat
F
G
dependent on the power supply voltage.
FN7417.2
January 29, 2008
10
EL8108
Capacitance at the Inverting Input
Single Supply Operation
Due to the topology of the current feedback amplifier, stray
capacitance at the inverting input will affect the AC and
transient performance of the EL8108 when operating in the
non-inverting configuration.
If a single supply is desired, values from +5V to +12V can be
used as long as the input common mode range is not
exceeded. When using a single supply, be sure to either:
1. DC bias the inputs at an appropriate common mode
voltage and AC couple the signal, or
In the inverting gain mode, added capacitance at the
inverting input has little effect since this point is at a virtual
ground and stray capacitance is therefore not “seen” by the
amplifier.
2. Ensure the driving signal is within the common mode
range of the EL8108.
Driving Cables and Capacitive Loads
Feedback Resistor Values
The EL8108 was designed with driving multiple coaxial
cables in mind. With 450mA of output drive and low output
impedance, driving six, 75Ω double terminated coaxial
cables to ±11V with one EL8108 is practical.
The EL8108 has been designed and specified with
R = 500Ω for A = +2. This value of feedback resistor yields
F
V
extremely flat frequency response with little to no peaking
out to 200MHz. As is the case with all current feedback
amplifiers, wider bandwidth, at the expense of slight
peaking, can be obtained by reducing the value of the
feedback resistor. Inversely, larger values of feedback
resistor will cause rolloff to occur at a lower frequency. See
“Typical Performance Curves” beginning on page 4, which
show 3dB bandwidth and peaking vs frequency for various
feedback resistors and various supply voltages.
When used as a cable driver, double termination is always
recommended for reflection-free performance. For those
applications, the back termination series resistor will
decouple the EL8108 from the capacitive cable and allow
extensive capacitive drive.
Other applications may have high capacitive loads without
termination resistors. In these applications, an additional
small value (5Ω to 50Ω) resistor in series with the output will
eliminate most peaking.
Bandwidth vs Temperature
Whereas many amplifier's supply current and consequently
3dB bandwidth drop off at high temperature, the EL8108 was
designed to have little supply current variations with
The following schematic show the EL8108 driving 6 double
terminated cables, each an average length of 50 ft.
temperature. An immediate benefit from this is that the 3dB
bandwidth does not drop off drastically with temperature.
Supply Voltage Range
The EL8108 has been designed to operate with supply
voltages from ±2.5V to ±6V. Optimum bandwidth, slew rate,
and video characteristics are obtained at higher supply
voltages. However, at ±2.5V supplies, the 3dB bandwidth at
A = +5 is a respectable 200MHz.
V
FN7417.2
January 29, 2008
11
EL8108
+5V
EL8108
-5V
750
750
All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems.
Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without
notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and
reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com
FN7417.2
January 29, 2008
12
EL8108
Small Outline Package Family (SO)
A
D
h X 45°
(N/2)+1
N
A
PIN #1
I.D. MARK
E1
E
c
SEE DETAIL “X”
1
(N/2)
B
L1
0.010 M
C A B
e
H
C
A2
A1
GAUGE
PLANE
SEATING
PLANE
0.010
L
4° ±4°
0.004 C
b
0.010 M
C
A
B
DETAIL X
MDP0027
SMALL OUTLINE PACKAGE FAMILY (SO)
INCHES
SO16
(0.150”)
SO16 (0.300”)
(SOL-16)
SO20
SO24
(SOL-24)
SO28
(SOL-28)
SYMBOL
SO-8
0.068
0.006
0.057
0.017
0.009
0.193
0.236
0.154
0.050
0.025
0.041
0.013
8
SO-14
0.068
0.006
0.057
0.017
0.009
0.341
0.236
0.154
0.050
0.025
0.041
0.013
14
(SOL-20)
0.104
0.007
0.092
0.017
0.011
0.504
0.406
0.295
0.050
0.030
0.056
0.020
20
TOLERANCE
MAX
NOTES
A
A1
A2
b
0.068
0.006
0.057
0.017
0.009
0.390
0.236
0.154
0.050
0.025
0.041
0.013
16
0.104
0.007
0.092
0.017
0.011
0.406
0.406
0.295
0.050
0.030
0.056
0.020
16
0.104
0.007
0.092
0.017
0.011
0.606
0.406
0.295
0.050
0.030
0.056
0.020
24
0.104
0.007
0.092
0.017
0.011
0.704
0.406
0.295
0.050
0.030
0.056
0.020
28
-
±0.003
±0.002
±0.003
±0.001
±0.004
±0.008
±0.004
Basic
-
-
-
c
-
D
1, 3
E
-
E1
e
2, 3
-
L
±0.009
Basic
-
L1
h
-
Reference
Reference
-
N
-
Rev. M 2/07
NOTES:
1. Plastic or metal protrusions of 0.006” maximum per side are not included.
2. Plastic interlead protrusions of 0.010” maximum per side are not included.
3. Dimensions “D” and “E1” are measured at Datum Plane “H”.
4. Dimensioning and tolerancing per ASME Y14.5M-1994
FN7417.2
January 29, 2008
13
EL8108
QFN (Quad Flat No-Lead) Package Family
MDP0046
QFN (QUAD FLAT NO-LEAD) PACKAGE FAMILY
(COMPLIANT TO JEDEC MO-220)
A
MILLIMETERS
D
B
SYMBOL QFN44 QFN38
QFN32
TOLERANCE
±0.10
NOTES
A
A1
b
0.90
0.02
0.25
0.20
7.00
5.10
7.00
5.10
0.50
0.55
44
0.90 0.90
0.90
0.02
0.22
0.20
5.00
-
-
0.02 0.02
0.25 0.23
0.20 0.20
5.00 8.00
+0.03/-0.02
±0.02
1
2
3
PIN #1
I.D. MARK
-
c
Reference
Basic
-
E
D
-
D2
E
3.80 5.80 3.60/2.48
7.00 8.00 6.00
5.80 5.80 4.60/3.40
Reference
Basic
8
-
2X
0.075 C
E2
e
Reference
Basic
8
-
0.50 0.80
0.40 0.53
0.50
0.50
32
2X
0.075 C
L
±0.05
-
TOP VIEW
N
38
7
32
8
Reference
Reference
Reference
4
6
5
ND
NE
11
7
11
12
8
9
0.10 M C A B
b
L
MILLIMETERS
SYMBOL QFN28 QFN24 QFN20
PIN #1 I.D.
TOLER-
ANCE NOTES
3
QFN16
0.90
1
2
3
A
0.90
0.02
0.90 0.90
0.90
0.02
±0.10
-
-
A1
0.02 0.02
0.02
+0.03/
-0.02
(E2)
b
c
0.25
0.20
4.00
2.65
5.00
3.65
0.50
0.40
28
0.25 0.30
0.20 0.20
4.00 5.00
2.80 3.70
5.00 5.00
3.80 3.70
0.50 0.65
0.40 0.40
0.25
0.20
4.00
2.70
4.00
2.70
0.50
0.40
20
0.33
±0.02
-
-
0.20 Reference
4.00 Basic
2.40 Reference
4.00 Basic
2.40 Reference
5
NE
D
-
D2
E
-
-
7
(D2)
E2
e
-
BOTTOM VIEW
0.65
0.60
16
Basic
-
L
±0.05
-
0.10 C
e
N
24
5
20
5
Reference
Reference
Reference
4
6
5
C
ND
NE
6
5
4
SEATING
PLANE
8
7
5
5
4
Rev 11 2/07
0.08 C
NOTES:
SEE DETAIL "X"
N LEADS
& EXPOSED PAD
1. Dimensioning and tolerancing per ASME Y14.5M-1994.
2. Tiebar view shown is a non-functional feature.
SIDE VIEW
3. Bottom-side pin #1 I.D. is a diepad chamfer as shown.
4. N is the total number of terminals on the device.
(c)
2
5. NE is the number of terminals on the “E” side of the package
(or Y-direction).
A
C
6. ND is the number of terminals on the “D” side of the package
(or X-direction). ND = (N/2)-NE.
(L)
A1
7. Inward end of terminal may be square or circular in shape with radius
(b/2) as shown.
N LEADS
DETAIL X
8. If two values are listed, multiple exposed pad options are available.
Refer to device-specific datasheet.
FN7417.2
January 29, 2008
14
相关型号：
EL814(A)-F
AC Input-Transistor Output Optocoupler, 1-Element, 5000V Isolation, ROHS COMPLIANT, DIP-4
EVERLIGHT
EL814(A)-FV
AC Input-Transistor Output Optocoupler, 1-Element, 5000V Isolation, ROHS COMPLIANT, DIP-4
EVERLIGHT
EL814M(A)(TB)
AC Input-Transistor Output Optocoupler, 1-Element, 5000V Isolation, ROHS COMPLIANT PACKAGE-4
EVERLIGHT
EL814M(A)(TD)
AC Input-Transistor Output Optocoupler, 1-Element, 5000V Isolation, ROHS COMPLIANT PACKAGE-4
EVERLIGHT
©2020 ICPDF网 联系我们和版权申明