DATASHEET
EL5178, EL5378
FN7491
Rev 7.00
February 4, 2016
700MHz Differential Twisted-Pair Drivers
The EL5178 and EL5378 are single and triple high bandwidth
amplifiers with an output in differential form. They are
primarily targeted for applications such as driving twisted-pair
lines in component video applications. The inputs can be in
either single-ended or differential form but the outputs are
always in differential form.
On the EL5178 and EL5378, two feedback inputs provide the
user with the ability to set the gain of each device (stable at
minimum gain of 2).
The output common mode level for each channel is set by the
associated REF pin, which has a -3dB bandwidth of over
110MHz. Generally, these pins are grounded but can be tied to
any voltage reference.
All outputs are short-circuit protected to withstand temporary
overload condition.
The EL5178 is available in 8 Ld MSOP and SOIC packages and
EL5378 is available in a 28 Ld QSOP package. All are specified
for operation over the full -40°C to +85°C temperature range.
Features
• Fully differential inputs, outputs, and feedback
• Differential input range ±2.3V
• 700MHz 3dB bandwidth
• 1000V/µs slew rate
• Low distortion at 5MHz and 20MHz
• Single 5V or dual ±5V supplies
• 60mA maximum output current
• Low power - 12.5mA per channel
• Pb-free (RoHS compliant)
Applications
• Twisted-pair driver
• Differential line driver
• VGA over twisted-pair
• ADSL/HDSL driver
• Single-ended to differential amplification
• Transmission of analog signals in a noisy environment
Pin Configurations
EL5378
(28 LD QSOP)
TOP VIEW
EL5178
(8 LD MSOP, SOIC)
TOP VIEW
FBP 1
IN+ 2
+
-
ER
G
N
FBN 4 O
L
NO
REF 3
AI
AV
E
B8 LOUT+
A
L
NC 1
7 VS-
INP1 2
6 VS+
INN1 3
5 OUT-
REF1 4
+
-
27 FBP1
26 FBN1
25 OUT1B
NC 5
24 VSP
INP2 6
23 VSN
INN2 7
22 OUT2
REF2 8
NC 9
+
-
21 FBP2
20 FBN2
INP3 10
19 OUT2B
INN3 11
18 OUT3
REF3 12
NC 13
EN 14
FN7491 Rev 7.00
February 4, 2016
28 OUT1
+
-
17 FBP3
16 FBN3
15 OUT3B
Page 1 of 18
EL5178, EL5378
Pin Descriptions
EL5178
(NO LONGER
AVAILABLE)
EL5378
PIN NAME
17, 21, 27
FBP3, FBP2, FBP1
PIN FUNCTION
Feedback from non-inverting outputs
2, 6, 10
INP1, INP2, INP3
Non-inverting inputs
3, 7, 11
INN1, INN2, INN3
Inverting inputs, note that on EL5178, this pin is also the REF pin
16, 20, 26
FBN3, FBN2, FBN1
Feedback from inverting outputs
15, 19, 25
OUT3B, OUT2B, OUT1B
24
VSP
Positive supply
23
VSN
Negative supply
18, 22, 28
OUT3, OUT2, OUT1
1, 5, 9, 13
NC
No connect; grounded for best crosstalk performance
4, 8, 12
REF1, REF2, REF3
Reference inputs, sets common-mode output voltage
14
EN
ENABLE
1
FBP
Feedback from non-inverting output
2
IN+
Non-inverting input
3
REF
Inverting input, note that on EL5178, this pin is also the REF pin
4
FBN
Feedback from inverting output
5
OUT-
Inverting output
6
VS+
Positive supply
7
VS-
Negative supply
8
OUT+
Inverting outputs
Non-inverting outputs
Non-inverting output
Ordering Information
PART NUMBER
(Notes 1, 2, 3)
PART
MARKING
TEMP RANGE
(°C)
PACKAGE
(RoHS Compliant)
PKG.
DWG. #
EL5178ISZ (No longer available,
recommended replacement:
EL5174ISZ)
5178ISZ
-40 to +85
8 Ld SOIC (150 mil)
M8.15E
EL5178IYZ (No longer available,
recommended replacement:
EL5174ISZ)
BBHAA
-40 to +85
8 Ld MSOP (3.0mm)
M8.118A
EL5378IUZ
EL5378IUZ
-40 to +85
28 Ld QSOP (150 mil)
M28.15
NOTES:
1. Add “-T13” suffix for 2.5k unit or “-T7” suffix for 1k unit Tape and Reel options. Please refer to TB347 for details on reel specifications.
2. 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.
3. For Moisture Sensitivity Level (MSL), please see device information page for EL5178, EL5378. For more information on MSL please see tech brief
TB363.
FN7491 Rev 7.00
February 4, 2016
Page 2 of 18
EL5178, EL5378
Absolute Maximum Ratings (TA = +25°C)
Thermal Information
Supply Voltage (VS+ to VS-) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12V
Supply Voltage Rate-of-Rise (dV/dT) . . . . . . . . . . . . . . . . . . . . . . . . . . 1V/µs
Input Voltage (IN+, IN- to VS+, VS-) . . . . . . . . . . . . . VS- - 0.3V to VS+ + 0.3V
Differential Input Voltage (IN+ to IN-). . . . . . . . . . . . . . . . . . . . . . . . . . ±4.8V
Maximum Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±60mA
Input Current (all inputs and references). . . . . . . . . . . . . . . . . . . . . . . . 4mA
ESD Rating
Human Body Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3kV
Machine Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300V
Storage Temperature Range. . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C
Operating Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . .+135°C
Ambient Operating Temperature . . . . . . . . . . . . . . . . . . . . . -40°C to +85°C
Power Dissipation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Curves
Pb-Free Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see TB493
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.
Electrical Specifications
VS+ = +5V, VS- = -5V, TA = +25°C, VIN = 0V, RLD = 1kΩ, CLD = 2.7pF, [RF = 604Ω, RG = 402Ω (EL5178)],
[RF = 402Ω, RG = 274Ω (EL5378)], unless otherwise specified.
PARAMETER
DESCRIPTION
TEST CONDITIONS
MIN
(Note 4)
TYP
MAX
(Note 4)
UNIT
AC PERFORMANCE
BW
-3dB Bandwidth
AV = 2, CLD = 2.7pF
700
MHz
AV = 5, CLD = 2.7pF
80
MHz
AV = 2, CLD = 2.7pF, RLD = 200Ω
320
MHz
BW
±0.1dB Bandwidth
AV = 2, CLD = 2.7pF
45
MHz
SR
Slew Rate, Differential (EL5178)
VOUT = 3VP-P, 20% to 80%
650
850
V/µs
Slew Rate, Differential (EL5378)
VOUT = 3VP-P, 20% to 80%
650
1000
V/µs
tSTL
Settling Time to 0.1%
VOUT = 2VP-P
35
ns
tOVR
Output Overdrive Recovery Time
AV = 2
20
ns
GBWP
Gain Bandwidth Product
350
MHz
VREFBW (-3dB)
VREF -3dB Bandwidth (EL5378)
CLD = 2.7pF
110
MHz
VREFSR+
VREF Slew Rate - Rise (EL5378)
VOUT = 2VP-P, 20% to 80%
134
V/µs
VREFSR-
VREF Slew Rate - Fall (EL5378)
VOUT = 2VP-P, 20% to 80%
70
V/µs
VN
Input Voltage Noise
At 10kHz
18
nV/Hz
IN
Input Current Noise
At 10kHz
1.5
pA/Hz
HD2
Second Harmonic Distortion
VOUT = 2VP-P, 5MHz
-83
dBc
VOUT = 2VP-P, 20MHz
-72
dBc
HD3
Third Harmonic Distortion
VOUT = 2VP-P, 5MHz
-88
dBc
VOUT = 2VP-P, 20MHz
-70
dBc
dG
Differential Gain at 3.58MHz
RLD = 300Ω, AV = 2
0.06
%
d
Differential Phase at 3.58MHz
RLD = 300Ω, AV = 2
0.13
°
eS
Channel Separation (EL5378)
At F = 1MHz
90
dB
INPUT CHARACTERISTICS
VOS
Input Referred Offset Voltage
IIN
Input Bias Current (VIN+, VIN-)
IREF
Input Bias Current (VREF) (EL5378)
RIN
Differential Input Resistance
CIN
Differential Input Capacitance
DMIR
Differential Mode Input Range (EL5378)
FN7491 Rev 7.00
February 4, 2016
VREF = ±3.0V
±1.9
±30
mV
-20
-14
-7
µA
0.05
2.3
4
µA
150
kΩ
1
pF
±2.3
V
Page 3 of 18
EL5178, EL5378
Electrical Specifications
VS+ = +5V, VS- = -5V, TA = +25°C, VIN = 0V, RLD = 1kΩ, CLD = 2.7pF, [RF = 604Ω, RG = 402Ω (EL5178)],
[RF = 402Ω, RG = 274Ω (EL5378)], unless otherwise specified. (Continued)
PARAMETER
DESCRIPTION
TEST CONDITIONS
CMIR+
Common-Mode Positive Input Range at
VIN+, VIN- (EL5378)
CMIR-
Common-Mode Negative Input Range at
VIN+, VIN- (EL5378)
VREFIN +
Positive Reference Input Voltage Range
(EL5378)
VIN+ = VIN- = 0V
VREFIN -
Negative Reference Input Voltage Range
(EL5378)
VIN+ = VIN- = 0V
VREFOS
Output Offset Relative to VREF (EL5378)
CMRR
Input Common-Mode Rejection Ratio
MIN
(Note 4)
TYP
3.1
3.4
-4.4
VIN = ±2.5V
3.2
MAX
(Note 4)
UNIT
V
-4.1
3.7
V
V
-3.3
-3.2
V
±50
±100
mV
65
78
dB
V
OUTPUT CHARACTERISTICS
VOUT
Output Voltage Swing
RL = 1kΩ
±3.4
±3.7
IOUT(Max)
Maximum Output Current
RL = 10Ω, VIN+ = ±3.2V
±50
±60
ROUT
Output Impedance
±100
130
mA
mΩ
SUPPLY
VSUPPLY
Supply Operating Range
IS(ON)
Power Supply Current - Per Channel
IS(OFF)+
Positive Power Supply Current - Disabled
(EL5378)
IS(OFF)-
Negative Power Supply Current - Disabled
(EL5378)
PSRR
Power Supply Rejection Ratio
VS+ to VS-
4.75
10
EN pin tied to 4.8V
VS from ±4.5V to ±5.5V
11
V
12.5
14
mA
1.7
10
µA
-200
-120
µA
60
75
dB
ENABLE (EL5378 ONLY)
tEN
Enable Time
130
ns
tDS
Disable Time
1.2
µs
VIH
EN Pin Voltage for Power-Up
VIL
EN Pin Voltage for Shutdown
IIH-EN
EN Pin Input Current High
At VEN = 5V
IIL-EN
EN Pin Input Current Low
At VEN = 0V
VS+ - 1.5
VS+ - 0.5
V
123
-20
V
-8
200
µA
µA
NOTE:
4. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature limits established by characterization
and are not production tested.
FN7491 Rev 7.00
February 4, 2016
Page 4 of 18
EL5178, EL5378
Typical Performance Curves
20
VS = ±5V
15 RLD = 1kΩ
CLD = 0pF
10 RF = 422Ω
RF = 1kΩ
GAIN (dB)
GAIN (dB)
VS = ±5V
RLD = 1k
CLD = 0pF
AV = 2
RF = 2kΩ
RF = 422Ω
5
AV = 2
0
-5
AV = 5
-10
-15
100k
1M
FIGURE 1. EL5178 FREQUENCY RESPONSE FOR VARIOUS RF
100M
1G
FIGURE 2. EL5178 FREQUENCY RESPONSE FOR VARIOUS GAIN
VS = ±5V
RF = 422Ω
CLD = 0pF
AV = 2
CLD = 22pF
CLD = 12pF
RLD = 1kΩ
GAIN (dB)
GAIN (dB)
VS = ±5V
RLD = 200Ω
RF = 422Ω
AV = 2
10M
FREQUENCY (Hz)
FREQUENCY (Hz)
CLD = 5.6pF
RLD = 200Ω
CLD = 0pF
100k
1M
FREQUENCY (Hz)
100k
1M
VS = ±5V
RLD = 1kΩ
CLD = 0pF
AV = 2
VOPP = 200mV
VOPP = 1V
VOPP = 2V
10M
100M
1G
FREQUENCY (Hz)
FIGURE 5. EL5178 FREQUENCY RESPONSE FOR VARIOUS VOPP
FN7491 Rev 7.00
February 4, 2016
100M
1G
FIGURE 4. EL5178 FREQUENCY RESPONSE FOR VARIOUS RLD
GAIN (dB)
GAIN (dB)
FIGURE 3. EL5178 FREQUENCY RESPONSE FOR VARIOUS CLD
VS = ±5V
RF = 422Ω
RLD = 200Ω
CLD = 5.6pF
AV = 2
10M
FREQUENCY (Hz)
Rf = 422Ω
Rf = 210Ω
Rf = 154Ω
100k
1M
10M
100M
1G
FREQUENCY (Hz)
FIGURE 6. EL5378 FREQUENCY RESPONSE FOR VARIOUS RF
Page 5 of 18
EL5178, EL5378
Typical Performance Curves
15
GAIN (dB)
10
VS = ±5V
RLD = 1kΩ
CLD = 0pF
RF = 422Ω
VS = ±5V
RF = 422Ω
RLD = 200Ω
AV = 2
AV = 2
5
0
-5
CLD = 12pF
CLD = 5.6pF
GAIN (dB)
20
(Continued)
CLD = 0pF
AV = 5
-10
-15
100k
1M
10M
100M
1G
100k
1M
FIGURE 7. EL5378 FREQUENCY RESPONSE FOR VARIOUS GAIN
1M
1G
RLD = 1kΩ
RLD = 200Ω
100k
100M
FIGURE 8. EL5378 FREQUENCY RESPONSE FOR VARIOUS CLD
CURRENT NOISE (pA/Hz)
VOLTAGE NOISE (nV/Hz)
GAIN (dB)
VS = ±5V
CLD = 0pF
RF = 422Ω
AV = 2
10M
FREQUENCY (Hz)
FREQUENCY (Hz)
10M
100M
1G
EN
IN
10
100
1k
10k
100k
1M
10M 100M
FREQUENCY (Hz)
FREQUENCY (Hz)
FIGURE 9. EL5378 FREQUENCY RESPONSE FOR VARIOUS RLD
FIGURE 10. VOLTAGE AND CURRENT NOISE vs FREQUENCY
VS = ±5V
CMRR (dB)
CMRR (dB)
VS = ±5V
PSRR+
PSRR-
100k
1M
10M
100M
FREQUENCY (Hz)
FIGURE 11. CMRR vs FREQUENCY
FN7491 Rev 7.00
February 4, 2016
1G
10k
100k
1M
10M
100M
FREQUENCY (Hz)
FIGURE 12. DIFFERENTIAL PSRR vs FREQUENCY
Page 6 of 18
EL5178, EL5378
Typical Performance Curves
(Continued)
OUTPUT IMPEDANCE ()
IMPEDANCE (Ω)
100
10
1
0.1
10k
100k
1M
10M
10k
100M
100k
FREQUENCY (Hz)
INPUT-TO-OUTPUT DELAY (ns)
CHANNEL SEPARATION (dB)
CH1 CH2
CH1 CH3
100k
1M
10M
100M
tdFALL
tdRISE
1G
VIN(P-P) (V)
FIGURE 16. INPUT-TO-OUTPUT DELAY
FIGURE 15. CHANNEL SEPARATION vs FREQUENCY
VS = ±5V
RLD = 1kΩ
CLD = 0pF
RF = 422Ω
F = 40MHz
6VOPP-DM)
F = 20MHz
THD (dB)
THD (dB)
100M
VS = ±5V
RF = 422Ω
AV = +2
FREQUENCY (Hz)
VS = ±5V
RLD = 1kΩ
RF = 422Ω
AV = 2
10M
FIGURE 14. OUTPUT IMPEDANCE [DISABLED]
FIGURE 13. OUTPUT IMPEDANCE vs FREQUENCY
VS = ±5V
RLD = 200Ω
RF = 422Ω
AV = 2
1M
FREQUENCY (Hz)
F = 10MHz
4VOPP-DM
2VOPP-DM
F = 2.2MHz
F = 5MHz
VOPP-DM (V)
FIGURE 17. TOTAL HARMONIC DISTORTION vs DIFFERENTIAL
OUTPUT SWING
FN7491 Rev 7.00
February 4, 2016
FREQUENCY (Hz)
FIGURE 18. TOTAL HARMONIC DISTORTION vs FREQUENCY
Page 7 of 18
EL5178, EL5378
Typical Performance Curves
(Continued)
VIN
VIN
200mV/DIV
1V/DIV
VOUT
VOUT
5ns/DIV
10ns/DIV
FIGURE 19. SMALL SIGNAL TRANSIENT RESPONSE
2V/DIV
FIGURE 20. LARGE SIGNAL TRANSIENT RESPONSE
VOUT
EN
4V/DIV
VOUT
2V/DIV
EN
4V/DIV
400ns/DIV
100ns/DIV
FIGURE 22. EL5378 DISABLED RESPONSE
FIGURE 21. EL5378 ENABLED RESPONSE
VS = ±5V
RL = 50Ω
VS = ±5V
RL = 50Ω
IP3 (dBm)
IP3 (dBm)
f1
FREQUENCY (Hz)
FIGURE 23. IP3 vs FREQUENCY
FN7491 Rev 7.00
February 4, 2016
f2
2f2-f1
2f1-f2
FREQUENCY (Hz)
FIGURE 24. THIRD ORDER INTERCEPT POINT
Page 8 of 18
EL5178, EL5378
VOUT SWING (V)
+VOUT
-VOUT
(Continued)
± SUPPLY CURRENT (mA)
Typical Performance Curves
+IS
-IS
TEMPERATURE (°C)
TEMPERATURE (°C)
FIGURE 26. ± SUPPLY CURRENT vs TEMPERATURE
FIGURE 25. OUTPUT SWING vs TEMPERATURE
VOS (mV)
INPUT BIAS CURRENT (µA)
VS = ±5.5V
TEMPERATURE (°C)
TEMPERATURE (°C)
FIGURE 28. INPUT BIAS CURRENT vs TEMPERATURE
FIGURE 27. OFFSET VOLTAGE vs TEMPERATURE
1.4
SLEW RATE (V/µs)
POWER DISSIPATION (W)
VOUT = 3VP-P
1.2 1.263W
FIGURE 29. SLEW RATE vs TEMPERATURE
FN7491 Rev 7.00
February 4, 2016
QSOP28
JA = +99°C/W
1.0
781mW
0.8
SO8
JA = +160°C/W
607mW
0.6
MSOP8
JA = +206°C/W
0.4
0.2
0
TEMPERATURE (°C)
JEDEC JESD51-3 LOW EFFECTIVE THERMAL
CONDUCTIVITY TEST BOARD
0
25
50
75 85 100
125
150
AMBIENT TEMPERATURE (°C)
FIGURE 30. PACKAGE POWER DISSIPATION vs AMBIENT
TEMPERATURE
Page 9 of 18
EL5178, EL5378
Typical Performance Curves
1.8
JEDEC JESD51-7 HIGH EFFECTIVE THERMAL
CONDUCTIVITY TEST BOARD
1.6
POWER DISSIPATION (W)
(Continued)
1.583W
1.4
QSOP28
JA = +79°C/W
1.2 1.136W
1.0 1.087W
0.8
MSOP8
JA = +115°C/W
0.6
SO8
JA = +110°C/W
0.4
0.2
0
0
25
50
75 85 100
125
150
AMBIENT TEMPERATURE (°C)
FIGURE 31. PACKAGE POWER DISSIPATION vs AMBIENT TEMPERATURE
FN7491 Rev 7.00
February 4, 2016
Page 10 of 18
RF1
422Ω
IN+
REF
RG
845Ω
RS2
50Ω
RS2
50Ω
CL1
5pF
-5V
1 FBP
OUT 8
2 INP
VSN 7
3 REF
VSP 6
4 FBN
OUTB 5
OUT
RLD
1kΩ
+5V
RF2
EL5178, EL5378
FN7491 Rev 7.00
February 4, 2016
Connection Diagrams
CL2
5pF
OUTB
422Ω
FIGURE 32. EL5178
+5V
1 NC
OUT1 28
INP1
2 INP1
FBP1 27
INN1
3 INN1
FBN1 26
REF1
4 REF1
OUT1B 25
5 NC
VSP 24
INP2
6 INP2
VSN 23
INN2
7 INN2
OUT2 22
REF2
8 REF2
FBP2 21
9 NC
FBN2 20
INP3
10 INP3
OUT2B 19
INN3
11 INN3
OUT3 18
12 REF3
FBP3 17
13 NC
FBN3 16
14 EN
OUT3B 15
REF3
Page 11 of 18
RSP1
50Ω
RSN1
50Ω
RSR1
50Ω
RSP2
50Ω
RSN2
50Ω
RSR2
50Ω
RSP3
50Ω
RSN3
50Ω
RSR3
50Ω
ENABLE
FIGURE 33. EL5378
RF
-5V
422Ω
RLD1
1kΩ
RG
845Ω
RF
422Ω
RF
422Ω
RG
845Ω
RF
422Ω
RF
422Ω
RG
845Ω
RF
422Ω
RLD2
1kΩ
RLD3
1kΩ
CL1
CL1B
CL2
CL2B
CL3
CL3B
5pF
5pF
5pF
5pF
5pF
5pF
EL5178, EL5378
Simplified Schematic
VS+
R1
IN+
IN-
R3
R2
FBP
R4
R7
R8
FBN
VB1
OUT+
RCD
REF
RCD
VB2
CC
OUT-
R9
R10
CC
R5
R6
VS-
FIGURE 34. SIMPLIFIED SCHEMATIC
Description of Operation and
Application Information
Product Description
The EL5178 and EL5378 are wide bandwidth, low power and
single/differential ended to differential output amplifiers. The
EL5178 is a single channel differential amplifier. Since the IN- pin
and REF pin are tied together internally, the EL5178 can be used
as a single ended to differential converter. The EL5378 is a triple
channel differential amplifier. The EL5378 has a separate IN- pin
and REF pin for each channel. It can be used as
single/differential ended to differential converter. The EL5178
and EL5378 are internally compensated for closed loop gain of 2
or greater. Connected in gain of 2 and driving a 1kΩ differential
load, the EL5178 and EL5378 have a -3dB bandwidth of
700MHz. Driving a 200Ω differential load at gain of 2, the
bandwidth is about 320MHz. The EL5378 is available with a
power-down feature to reduce the power while the amplifier is
disabled.
Input, Output and Supply Voltage Range
The EL5178 and EL5378 have been designed to operate with a
single supply voltage of 5V to 10V or split supplies with its total
voltage from 5V to 10V. The amplifiers have an input common
mode voltage range from -4.3V to 3.4V for ±5V supply. The
differential mode input range (DMIR) between the two inputs is
from -2.3V to +2.3V. The input voltage range at the REF pin is
from -3.3V to 3.7V. If the input common mode or differential
mode signal is outside the above-specified ranges, it will cause
the output signal to become distorted.
The output of the EL5178 and EL5378 can swing from -3.8V to
+3.8V at 1kΩ differential load at ±5V supply. As the load
resistance becomes lower, the output swing is reduced.
Differential and Common-Mode Gain
Settings
the common mode signal and also part of the differential mode
signal. For the true balance differential outputs, the REF pin must be
tied to the same bias level as the IN+ pin. For a ±5V supply, just tie
the REF pin to GND if the IN+ pin is biased at 0V with a 50Ω or 75Ω
termination resistor. For a single supply application, if the IN+ is
biased to half of the rail, the REF pin should also be biased to half of
the rail.
The gain setting for EL5178 is expressed in Equation 1:
R F1 + R F2
V ODM = V IN + 1 + ----------------------------
RG
V OCM = V REF = 0V
2R F
V ODM = V IN + 1 + -----------
RG
(EQ. 1)
Where:
VREF = 0V
RF1 = RF2 = RF
EL5378 has a separate IN- pin and REF pin. It can be used as a
single/differential ended to differential converter. The voltage
applied at REF pin can set the output common mode voltage and
the gain is one.
The gain setting for EL5378 is expressed in Equation 2:
R F1 + R F2
V ODM = V IN + – V IN - 1 + ----------------------------
RG
2R F
V ODM = V IN + – V IN - 1 + -----------
RG
(EQ. 2)
V OCM = V REF
Where:
RF1 = RF2 = RF
For EL5178, since the IN- pin and REF pin are bonded together as
the REF pin in an 8 Ld package, the signal at the REF pin is part of
FN7491 Rev 7.00
February 4, 2016
Page 12 of 18
EL5178, EL5378
Disable/Power-Down (for EL5378 only)
RF1
The EL5378 can be disabled and its outputs placed in a high
impedance state. The turn-off time is about 1.2µs and the
turn-on time is about 130ns. When disabled, the amplifier's
supply current is reduced to 1.7µA for IS+ and 120µA for IStypically, thereby effectively eliminating the power consumption.
The amplifier's power-down can be controlled by standard CMOS
signal levels at the EN pin. The applied logic signal is relative to
the VS+ pin. Letting the EN pin float or applying a signal that is
less than 1.5V below VS+ will enable the amplifier. The amplifier
will be disabled when the signal at the EN pin is above VS+ - 0.5V.
FBP
VIN+
VIN-
RG
VREF
V O+
IN+
INREF
V O-
FBN
RF2
Output Drive Capability
FIGURE 35.
Choice of Feedback Resistor and Gain
Bandwidth Product
The feedback resistor forms a pole with the parasitic capacitance
at the inverting input. As this pole becomes smaller, the
amplifier's phase margin is reduced. This causes ringing in the
time domain and peaking in the frequency domain. Therefore, RF
has some maximum value that should not be exceeded for
optimum performance. If a large value of RF must be used, a
small capacitor in the few Pico farad range in parallel with RF
can help to reduce the ringing and peaking at the expense of
reducing the bandwidth.
The bandwidth of the EL5178 and EL5378 depends on the load
and the feedback network. RF and RG appear in parallel with the
load. As this combination gets smaller, the bandwidth falls off.
Consequently, RF also has a minimum value that should not be
exceeded for optimum bandwidth performance. For the gains
other than 1, optimum response is obtained with RF between
500Ω to 1kΩ.
The EL5178 and EL5378 have a gain bandwidth product of
350MHz for RLD = 1kΩ. For gains 5, its bandwidth can be
predicted by Equation 3:
Gain BW = 300MHz
(EQ. 3)
Driving Capacitive Loads and Cables
The EL5178 and EL5378 can drive a 23pF differential capacitor
in parallel with 200Ω differential load with less than 5dB of
peaking at gain of 2. If less peaking is desired in applications, a
small series resistor (usually between 5Ω to 50Ω) can be placed
in series with each output to eliminate most peaking. However,
this will reduce the gain slightly. If the gain setting is greater than
2, the gain resistor RG can then be chosen to make up for any
gain loss, which may be created by the additional series resistor
at the output.
When used as a cable driver, double termination is always
recommended for reflection-free performance. For those
applications, a back-termination series resistor at the amplifier's
output will isolate the amplifier from the cable and allow
extensive capacitive drive. However, other applications may have
high capacitive loads without a back-termination resistor. Again,
a small series resistor at the output can help to reduce peaking.
The EL5178 and EL5378 have internal short-circuit protection. Its
typical short-circuit current is ±60mA. If the output is shorted
indefinitely, the power dissipation could easily increase such that
the part will be destroyed. Maximum reliability is maintained if
the output current never exceeds ±60mA. This limit is set by the
design of the internal metal interconnections.
Power Dissipation
With the high output drive capability of the EL5178 and EL5378, it
is possible to exceed the +135°C absolute maximum junction
temperature under certain load current conditions. Therefore, it is
important to calculate the maximum junction temperature for the
application to determine if the load conditions or package types
need to be modified for the amplifier to remain in the safe
operating area.
The maximum power dissipation allowed in a package is
determined according to Equation 4:
T JMAX – T AMAX
PD MAX = -------------------------------------------- JA
(EQ. 4)
Where:
TJMAX = Maximum junction temperature
TAMAX = Maximum ambient temperature
JA = Thermal resistance of the package
The maximum power dissipation actually produced by an IC is
the total quiescent supply current times the total power supply
voltage, plus the power in the IC due to the load, or as expressed
in Equation 5:
V O
PD = i V STOT I SMAX + V STOT – V O ------------
R LD
(EQ. 5)
Where:
VSTOT = Total supply voltage = VS+ - VSISMAX = Maximum quiescent supply current per channel
VO = Maximum differential output voltage of the application
RLD = Differential load resistance
ILOAD = Load current
i = Number of channels by setting the two PDMAX equations
equal to each other, we can solve the output current and RLD
to avoid the device overheat.
FN7491 Rev 7.00
February 4, 2016
Page 13 of 18
EL5178, EL5378
Power Supply Bypassing and Printed Circuit
Board Layout
As with any high frequency device, a good printed circuit board
layout is necessary for optimum performance. Lead lengths
should be as short as possible. The power supply pin must be
well bypassed to reduce the risk of oscillation. For normal single
supply operation, where the VS- pin is connected to the ground
plane, a single 4.7µF tantalum capacitor in parallel with a 0.1µF
ceramic capacitor from VS+ to GND will suffice. This same
capacitor combination should be placed at each supply pin to
ground if split supplies are to be used. In this case, the VS- pin
becomes the negative supply rail.
For good AC performance, parasitic capacitance should be kept
to a minimum. Use of wire-wound resistors should be avoided
because of their additional series inductance. Use of sockets
should also be avoided if possible. Sockets add parasitic
inductance and capacitance that can result in compromised
performance. Minimizing parasitic capacitance at the amplifier's
inverting input pin is very important. The feedback resistor
should be placed very close to the inverting input pin. Strip line
design techniques are recommended for the signal traces.
As the signal is transmitted through a cable, the high frequency
signal will be attenuated. One way to compensate this loss is to
boost the high frequency gain at the receiver side.
Typical Applications
RF
FBP
50
TWISTED PAIR
IN+
IN+
RT
RG
INREF
EL5178/
EL5378
50
IN-
ZO = 100Ω
FBN
EL5175/
EL5375
VO
REF
RF
RFR
RGR
FIGURE 36. TWISTED PAIR CABLE RECEIVER
RF
GAIN
(dB)
FBP
RT
75
RGC
RG
CL
VO+
IN+
INREF
VO-
FBN
RF
fL
2R F
DC Gain = 1 + ----------RG
1
f L ------------------------2R G C C
2R F
HF Gain = 1 + -------------------------R G R GC
1
f H ----------------------------2R GC C C
fH
FREQUENCY
FIGURE 37. TRANSMIT EQUALIZER
FN7491 Rev 7.00
February 4, 2016
Page 14 of 18
EL5178, EL5378
Revision History
The revision history provided is for informational purposes only and is believed to be accurate, but not warranted. Please go to the web to make sure that
you have the latest revision.
DATE
REVISION
CHANGE
February 4, 2016
FN7491.7
Added "No longer available" across the 5178 pinout on page 1.
Updated “Ordering Information” on page 2 by adding Temp Range column and updating tape and reel note to
show options.
Added "No longer available" under the "EL5178" header of “Pin Descriptions” on page 2.
Changed "gain of 1" to "gain of 2"1st paragraph under “Product Description” on page 12.
Changed "bounded" to "bonded".in 1st sentence under “Differential and Common-Mode Gain Settings” on
page 12.
Deleted from 1st and 2nd paragraph in “Choice of Feedback Resistor and Gain Bandwidth Product” on page 13
"For gains greater than 1," and "for gains other than 1"
August 19, 2015
FN7491.6
Updated Ordering Information table on page 2.
Added Revision History and About Intersil sections.
About Intersil
Intersil Corporation is a leading provider of innovative power management and precision analog solutions. The company's products
address some of the largest markets within the industrial and infrastructure, mobile computing and high-end consumer markets.
For the most updated datasheet, application notes, related documentation and related parts, please see the respective product
information page found at www.intersil.com.
You may report errors or suggestions for improving this datasheet by visiting www.intersil.com/ask.
Reliability reports are also available from our website at www.intersil.com/support
FN7491 Rev 7.00
February 4, 2016
Page 15 of 18
EL5178, EL5378
Package Outline Drawing
M8.15E
8 LEAD NARROW BODY SMALL OUTLINE PLASTIC PACKAGE
Rev 0, 08/09
4
4.90 ± 0.10
A
DETAIL "A"
0.22 ± 0.03
B
6.0 ± 0.20
3.90 ± 0.10
4
PIN NO.1
ID MARK
5
(0.35) x 45°
4° ± 4°
0.43 ± 0.076
1.27
0.25 M C A B
SIDE VIEW “B”
TOP VIEW
1.75 MAX
1.45 ± 0.1
0.25
GAUGE PLANE
C
SEATING PLANE
0.10 C
0.175 ± 0.075
SIDE VIEW “A
0.63 ±0.23
DETAIL "A"
(1.27)
(0.60)
NOTES:
(1.50)
(5.40)
1.
Dimensions are in millimeters.
Dimensions in ( ) for Reference Only.
2.
Dimensioning and tolerancing conform to AMSE Y14.5m-1994.
3.
Unless otherwise specified, tolerance : Decimal ± 0.05
4.
Dimension does not include interlead flash or protrusions.
Interlead flash or protrusions shall not exceed 0.25mm per side.
5.
The pin #1 identifier may be either a mold or mark feature.
6.
Reference to JEDEC MS-012.
TYPICAL RECOMMENDED LAND PATTERN
FN7491 Rev 7.00
February 4, 2016
Page 16 of 18
EL5178, EL5378
Package Outline Drawing
M8.118A
8 LEAD MINI SMALL OUTLINE PLASTIC PACKAGE (MSOP)
Rev 0, 9/09
3.0±0.1
8
A
0.25
CAB
3.0±0.1
4.9±0.15
DETAIL "X"
1.10 Max
PIN# 1 ID
B
SIDE VIEW 2
1
0.18 ± 0.05
2
0.65 BSC
TOP VIEW
0.95 BSC
0.86±0.09
H
GAUGE
PLANE
C
0.25
SEATING PLANE
0.33 +0.07/ -0.08
0.08 C A B
0.10 ± 0.05
3°±3°
0.10 C
0.55 ± 0.15
DETAIL "X"
SIDE VIEW 1
5.80
NOTES:
4.40
3.00
1.
Dimensions are in millimeters.
2.
Dimensioning and tolerancing conform to JEDEC MO-187-AA
and AMSE Y14.5m-1994.
3.
Plastic or metal protrusions of 0.15mm max per side are not
included.
4.
Plastic interlead protrusions of 0.25mm max per side are not
included.
5.
Dimensions “D” and “E1” are measured at Datum Plane “H”.
6.
This replaces existing drawing # MDP0043 MSOP 8L.
0.65
0.40
1.40
TYPICAL RECOMMENDED LAND PATTERN
FN7491 Rev 7.00
February 4, 2016
Page 17 of 18
EL5178, EL5378
Shrink Small Outline Plastic Packages (SSOP)
Quarter Size Outline Plastic Packages (QSOP)
M28.15
N
INDEX
AREA
H
0.25(0.010) M
E
GAUGE
PLANE
-B1
2
INCHES
3
0.25
0.010
SEATING PLANE
-A-
28 LEAD SHRINK SMALL OUTLINE PLASTIC PACKAGE
(0.150” WIDEBODY)
B M
A
D
h x 45°
-C-
e
0.17(0.007) M
A2
A1
B
L
C
0.10(0.004)
C A M
SYMBOL
MIN
MAX
MIN
MAX
NOTES
A
0.053
0.069
1.35
1.75
-
A1
0.004
0.010
0.10
0.25
-
A2
-
0.061
-
1.54
-
B
0.008
0.012
0.20
0.30
9
C
0.007
0.010
0.18
0.25
-
D
0.386
0.394
9.81
10.00
3
E
0.150
0.157
3.81
3.98
4
e
NOTES:
1. Symbols are defined in the “MO Series Symbol List” in Section 2.2
of Publication Number 95.
2. Dimensioning and tolerancing per ANSI Y14.5M-1982.
0.025 BSC
0.635 BSC
-
0.228
0.244
5.80
6.19
-
h
0.0099
0.0196
0.26
0.49
5
L
0.016
0.050
0.41
1.27
6
8°
0°
H
B S
MILLIMETERS
N
28
0°
28
3. Dimension “D” does not include mold flash, protrusions or gate
burrs. Mold flash, protrusion and gate burrs shall not exceed
0.15mm (0.006 inch) per side.
7
8°
Rev. 1 6/04
4. Dimension “E” does not include interlead flash or protrusions. Interlead flash and protrusions shall not exceed 0.25mm (0.010 inch)
per side.
5. The chamfer on the body is optional. If it is not present, a visual index feature must be located within the crosshatched area.
6. “L” is the length of terminal for soldering to a substrate.
7. “N” is the number of terminal positions.
8. Terminal numbers are shown for reference only.
9. Dimension “B” does not include dambar protrusion. Allowable dambar protrusion shall be 0.10mm (0.004 inch) total in excess of “B”
dimension at maximum material condition.
10. Controlling dimension: INCHES. Converted millimeter dimensions
are not necessarily exact.
© Copyright Intersil Americas LLC 2004-2016. All Rights Reserved.
All trademarks and registered trademarks are the property of their respective owners.
For additional products, see www.intersil.com/en/products.html
Intersil products are manufactured, assembled and tested utilizing ISO9001 quality systems as noted
in the quality certifications found at www.intersil.com/en/support/qualandreliability.html
Intersil products are sold by description only. Intersil may modify the circuit design and/or specifications of products at any time without notice, provided that such
modification does not, in Intersil's sole judgment, affect the form, fit or function of the product. Accordingly, the reader is cautioned to verify that datasheets 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
FN7491 Rev 7.00
February 4, 2016
Page 18 of 18
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