ELANTEC EL5444CS

100 MHz Single Supply Rail to Rail Amplifier
Features
General Description
• Rail to Rail Output Swing
The EL5144C series amplifiers are voltage feedback, high speed, rail
to rail amplifiers designed to operate on a single +5V supply. They
offer unity gain stability with an unloaded –3dB bandwidth of 100
MHz. The input common mode voltage range extends from the negative rail to within 1.5V of the positive rail. Driving a 75Ω double
terminated coaxial cable, the EL5144C series amplifiers drive to
within 150 mV of either rail. The 200 V/µsec slew rate and 0.1% / 0.1°
differential gain / differential phase makes these parts ideal for composite and component video applications. With its voltage feedback
architecture, this amplifier can accept reactive feedback networks,
allowing them to be used in analog filtering applications These amplifiers will source 90 mA and sink 65 mA.
5V
0V
•
•
•
•
-3 dB Bandwidth = 100 MHz
Single Supply +5V operation
Power Down to 2.6 µA
Large Input Common Mode Range
0V < VCM < 3.5 V
• Diff Gain/Phase = 0.1%/0.1°
• Low Power 35mW per amplifier
• Space Saving SOT23-5, MSOP8&10, & QSOP-16 packaging
Applications
•
•
•
•
•
•
•
•
Video Amplifier
5 Volt Analog Signal Processing
Multiplexer
Line Driver
Portable Computers
High Speed Communications
Sample & Hold Amplifier
Comparator
The EL5146C and EL5246C have a power-savings disable feature.
Applying a standard TTL low logic level to the CE (Chip Enable) pin
reduces the supply current to 2.6 µA within 10 nsec. Turn on time is
500 nsec, allowing true break-before-make conditions for multiplexing applications. Allowing the CE pin to float or applying a high logic
level will enable the amplifier.
EL5144C, EL5146C, EL5244C, EL5246C, EL5444C
EL5144C, EL5146C, EL5244C,
EL5246C, EL5444C
For applications where board space is critical, singles are offered in a
SOT23-5 package, duals in MSOP-8 and MSOP-10 packages, and
quads in a QSOP-16 package. Singles, duals and quads are also available in industry standard pinouts in SOIC and PDIP packages. All
parts operate over the industrial temperature range of -40°C to +85°C.
Pin Configurations
SOIC-8, PDIP-8
SOT23-5
8 CE
NC 1
Ordering Information
IN- 2
Package
Outline #
EL5144CW
-40°C to +85°C
5 Pin SOT23
MDP0038
EL5146CN
-40°C to +85°C
8 Pin PDIP
MDP0031
EL5146CS
-40°C to +85°C
8 Pin SOIC
MDP0027
EL5244CN
-40°C to +85°C
8 Pin PDIP
MDP0031
EL5244CS
-40°C to +85°C
8 Pin SOIC
MDP0027
EL5244CY
-40°C to +85°C
8 Pin MSOP
MDP0043
EL5246CN
-40°C to +85°C
14 Pin PDIP
MDP0031
EL5246CS
-40°C to +85°C
14 Pin SOIC
MDP0027
EL5246CY
-40°C to +85°C
10 Pin MSOP
MDP0043
EL5444CN
-40°C to +85°C
14 Pin PDIP
MDP0031
EL5444CS
-40°C to +85°C
14 Pin SOIC
MDP0027
EL5444CU
-40°C to +85°C
16 Pin QSOP
MDP0040
GND 2
IN+ 3
IN+ 3
+
7 VS
6 OUT
4 IN5 NC
GND 4
EL5144C
EL5146C
Dual and Quad Amplifier Pin Configurations on Page 12
March 1, 2000
Temp. Range
© 1998 Elantec, Inc.
5 VS
+
Part No
OUT 1
EL5144C, EL5146C, EL5244C, EL5246C, EL5444C
EL5144C, EL5146C, EL5244C, EL5246C,
EL5444C
100 MHz Single Supply Rail to Rail Amplifier
Absolute Maximum Ratings (T
A
= 25 °C)
Values beyond absolute maximum ratings can cause the device to be prematurely damaged. Absolute maximum ratings are stress ratings only and
functional device operation is not implied.
+6V
Supply Voltage between VS and GND
Maximum Continuous Output Current
50mA
Power Dissipation
Pin Voltages
Storage Temperature
Operating Temperature
Lead Temperature
See Curves
GND - 0.5V to VS +0.5V
-65°C to +150°C
-40°C to +85°C
260°C
Important Note:
All parameters having Min/Max specifications are guaranteed. Typ values are for information purposes only. Unless otherwise noted, all tests are at the specified
temperature and are pulsed tests, therefore: TJ = TC = TA.
Electrical Characteristics
VS=+5V, GND=0V, TA=25°C, CE = +2V, unless otherwise specified.
Parameter
Description
Conditions
Min
Typ
Max
Units
AC Performance
dG
Differential Gain Error
dP
Differential Phase Error
BW
Bandwidth
[1]
[1]
G=2, RL=150Ω to 2.5V, RF=1KΩ
0.1
%
G=2, RL=150Ω to 2.5V, RF=1KΩ
0.1
deg
-3dB, G=1, RL=10kΩ, RF=0
100
MHz
-3dB, G=1, RL=150Ω, RF=0
60
MHz
±0.1dB, G=1, RL=150Ω to GND, RF=0
8
MHz
60
MHz
200
V/µs
35
ns
BW1
Bandwidth
GBWP
Gain Bandwidth Product
SR
Slew Rate
G=1, RL=150Ω to GND, RF=0, VO=0.5V to
3.5V
ts
Settling Time
to 0.1%, VOUT = 0 to 3V
150
DC Performance
AVOL
VOS
Open Loop Voltage Gain
Offset Voltage
TCVOS
Input Offset Voltage Temperature Coefficient
IB
Input Bias Current
RL=no load, VOUT=0.5V to 3V
54
65
dB
RL=150Ω to GND, VOUT=0.5V to 3V
40
50
dB
VCM=1V, SOT23-5 and MSOP packages
25
mV
VCM=1V, All other packages
15
mV
µV/OC
10
VCM=0V & 3.5V
2
100
nA
Input Characteristics
CMIR
Common Mode Input Range
CMRR ≥ 47dB
0
CMRR
Common Mode Rejection Ratio
DC, VCM = 0 to 3.0V
50
DC, VCM = 0 to 3.5V
47
60
dB
RIN
Input Resistance
1.5
GΩ
CIN
Input Capacitance
1.5
pF
3.5
60
V
dB
Output Characteristics
VOP
VON
Positive Output Voltage Swing
Negative Output Voltage Swing
RL=150Ω to 2.5V [2]
4.70
4.85
V
RL=150Ω to GND [2]
4.20
4.65
V
RL=1KΩ to 2.5V [2]
4.95
4.97
RL=150Ω to 2.5V [2]
0.15
RL=150Ω to GND [2]
0
RL=1K to 2.5V [2]
+IOUT
Positive Output Current
RL=10Ω to 2.5V
2
60
V
0.30
V
V
0.03
0.05
V
90
120
mA
100 MHz Single Supply Rail to Rail Amplifier
Electrical Characteristics
VS=+5V, GND=0V, TA=25°C, CE = +2V, unless otherwise specified.
Parameter
-IOUT
Description
Negative Output Current
Conditions
RL=10Ω to 2.5V
Min
Typ
Max
Units
-50
-65
-80
mA
Enable (EL5146C & EL5246C Only)
tEN
Enable Time
EL5146C, EL5246C
500
tDIS
Disable Time
EL5146C, EL5246C
10
IIHCE
CE pin Input High Current
CE = 5V, EL5146C, EL5246C
IILCE
CE pin Input Low Current
CE = 0V, EL5146C, EL5246C
VIHCE
CE pin Input High Voltage for Power Up
EL5146C, EL5246C
VILCE
CE pin Input Low Voltage for Power Down
EL5146C, EL5246C
nS
nS
0.003
1
µA
-1.2
-3
µA
2.0
V
0.8
V
Supply
IsON
Supply Current - Enabled (per amplifier)
No Load, VIN= 0V, CE=5V
7
8.8
mA
IsOFF
Supply Current - Disabled (per amplifier)
No Load, VIN= 0V, CE=0V
2.6
5
µA
PSOR
Power Supply Operating Range
4.75
5.0
5.25
PSRR
Power Supply Rejection Ratio
50
60
DC, VS = 4.75V to 5.25V
1. Standard NTSC test, AC signal amplitude = 286 mVp-p, f=3.58 MHz, VOUT is swept from 0.8V to 3.4V, RL is DC coupled
2. RL is Total Load Resistance due to Feedback Resistor and Load Resistor
3
V
dB
EL5144C, EL5146C, EL5244C, EL5246C, EL5444C
EL5144C, EL5146C, EL5244C, EL5246C,
EL5444C
100 MHz Single Supply Rail to Rail Amplifier
Typical Performance Curves
Non-Inverting Frequency Response (Gain)
VCM = 1.5V, RL = 150Ω
19
Non-Inverting Frequency Response (Phase)
VCM = 1.5V, RL= 150Ω
15
+2
MAGNITUDE (NORMALIZED) (dB)
AV = +1, RF = 0Ω
AV = +1, RF = 0Ω
0
0
-45
PHASE (°)
-2
AV = +2, RF = 1KΩ
-4
-90
AV = +2, RF = 1KΩ
AV = +5.6, RF = 1KΩ
-135
AV = +5.6, RF = 1KΩ
-6
-180
-8
1M
10M
100M
1M
10M
FREQUENCY (Hz)
0
Inverting Frequency Response (Phase)
VCM = 1.5V, RF = 1KΩ, RL= 150Ω
2
AV = -1
180
AV = -1
AV = -2
135
AV = -2
PHASE (°)
MAGNITUDE (NORMAILZED) (dB)
+2
AV = -5.6
-2
AV = -5.6
90
-4
45
-6
0
1M
10M
100M
1M
10M
FREQUENCY (Hz)
3dB Bandwidth vs. Die Temperature for Various Gains
RL = 10KΩ
51
100
150
3dB BANDWIDTH (MHz)
80
AV = +1, RF = 0Ω
60
AV = +2, RF = 1KΩ
40
20
0
-55
100M
FREQUENCY (Hz)
3dB Bandwidth vs. Die Temperature for Various Gains
RL = 150Ω
52
100M
FREQUENCY(Hz)
Inverting Frequency Response (Gain)
VCM = 1.5V, RF = 1KΩ, RL= 150Ω
1
3dB BANDWIDTH (MHz)
EL5144C, EL5146C, EL5244C, EL5246C, EL5444C
EL5144C, EL5146C, EL5244C, EL5246C,
EL5444C
AV = +5.6, RF = 1KΩ
-15
25
65
105
90
DIE TEMPERATURE (°C)
AV = +2, RF = 1KΩ
60
30
0
-55
145
AV = +1, RF = 0Ω
120
AV = +5.6, RF = 1KΩ
-15
25
65
DIE TEMPERATURE (°C)
4
105
145
100 MHz Single Supply Rail to Rail Amplifier
Frequency Response for Various RL
VCM = 1.5V, RF = 0Ω, AV = +1
+4
RL= 10KΩ
+2
0
RL= 520Ω
-2
RL= 150Ω
-4
1M
Frequency Response for Various CL
VCM = 1.5V, RL = 150Ω, AV = +1
17
MAGNITUDE (NORMALIZED) (dB)
MAGNITUDE (NORMALIZED) (dB)
16
10M
+8
CL= 100pF
CL= 47pF
+4
0
CL= 22pF
CL= 0pF
-4
-8
100M
1M
10M
FREQUENCY (Hz)
Frequency Response for Various RF and RG
VCM = 1.5V,RL = 150Ω, AV = +2
18
100M
FREQUENCY (Hz)
Group Delay vs. Frequency
23
MAGNITUDE (NORMALIZED) (dB)
10
AV = +2
RF = 1KΩ
RF = RG = 2KΩ
+2
RF = RG = 1KΩ
RF = RG = 560Ω
-2
8
GROUP DELAY (nsec)
0
-4
6
4
AV = +1
RF = 0Ω
2
-6
1M
10M
0
1M
100M
10M
FREQUENCY (Hz)
Open Loop Gain and Phase vs. Frequency
80
45
70
Phase
60
90
40
RL = 150Ω
135
PHASE (°)
GAIN (dB)
0
RL = 1KΩ
80
20
0
1K
Open Loop Voltage Gain vs. Die Temperature
43
180
Gain
100K
OPEN LOOP GAIN (dB)
29
100M
FREQUENCY (Hz)
60
50
FREQUENCY (Hz)
RL=150Ω
40
30
-55
10M
No Load
-15
25
65
DIE TEMPERATURE (°C)
5
105
145
EL5144C, EL5146C, EL5244C, EL5246C, EL5444C
EL5144C, EL5146C, EL5244C, EL5246C,
EL5444C
100 MHz Single Supply Rail to Rail Amplifier
Voltage Noise vs. Frequency
65
200
1K
CLOSED LOOP (Z0)
VOLTAGE NOISE (nV/√Hz)
Closed Loop Output Impedance vs. Frequency
RF = 0, AV = +1
26
10K
100
10
20
2
0.2
1
10
1K
100K
10K
10M
100K
Offset Voltage vs. Die Temperature
(6 Typical Samples)
39
10M
1M
100M
FREQUENCY (Hz)
FREQUENCY (Hz)
PSRR and CMRR vs. Frequency
28
+20
12
PSRR, CMRR (dB)
OFFSET VOLTAGE (mV)
0
6
0
-6
CMRR
-20
-PSRR
+PSRR
-40
-60
-12
-80
-55
-15
25
65
105
145
1K
Output Voltage Swing vs. Frequency for THD < 1%
RF = 1KΩ, AV = +2
21
1M
10M
100M
OUTPUT VOLTAGE SWING (VPP)
5
4
RL = 500Ω to 2.5V
3
2
0
1M
100K
Output Voltage Swing vs. Frequency for THD < 0.1%
RF = 1KΩ, AV = +2
22
5
1
10K
FREQUENCY (Hz)
DIE TEMPERATURE (°C)
OUTPUT VOLTAGE SWING (VPP)
EL5144C, EL5146C, EL5244C, EL5246C, EL5444C
EL5144C, EL5146C, EL5244C, EL5246C,
EL5444C
RL = 150Ω to 2.5V
10M
4
3
RL = 150Ω to 2.5V
1
0
1M
100M
FREQUENCY (Hz)
RL = 500Ω to 2.5V
2
10M
FREQUENCY (Hz)
6
100M
100 MHz Single Supply Rail to Rail Amplifier
Large Signal Pulse Response (Single Supply)
VS= +5V, RL = 150Ω to 0V, RF = 1KΩ, AV = +2
62
Small Signal Pulse Response (Single Supply)
VS= +5V, RL = 150Ω to 0V, RF = 1KΩ, AV = +2
63
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
4
3
2
1
1.7
1.5
1.3
0
TIME (20ns/DIV)
Large Signal Pulse Response (Split Supplies)
VS= ±2.5V, RL = 150Ω to 0V, RF = 1KΩ, AV = +2
Small Signal Pulse Response (Split Supply)
VS= ±2.5V, RL = 150Ω to 0V, RF = 1KΩ, AV = +2
64
OUTPUT VOLTAGE (V)
61
OUTPUT VOLTAGE (V)
TIME (20ns/DIV)
+2
0
-2
+0.2
0
-0.2
TIME (20ns/DIV)
TIME (20ns/DIV)
Settling Time vs. Settling Accuracy
RL=1KΩ, RF = 500Ω, AV = -1, VSTEP = 3V
70
48
250
80
SLEW RATE (V/µS)
SETTLING TIME (nsec)
100
Slew Rate vs. Die Temperature
60
40
200
20
0
0.01
0.1
150
-55
1.0
-15
25
65
DIE TEMPERATURE (°C)
SETTLING ACCURACY (%)
7
105
145
EL5144C, EL5146C, EL5244C, EL5246C, EL5444C
EL5144C, EL5146C, EL5244C, EL5246C,
EL5444C
100 MHz Single Supply Rail to Rail Amplifier
Differential Gain for RL Tied to 0V
RF = 0, AV = +1
54
+0.2
+0.04
DIFFERENTIAL PHASE (°)
DIFFERENTIAL GAIN (%)
Differential Phase for RL Tied to 0V
RF = 0, AV = +1
53
+0.08
RL = 10KΩ
0
RL = 150Ω
-0.04
-0.08
+0.1
RL = 150Ω
0
-0.1
RL = 10KΩ
-0.2
0.25
3.25
1.75
0.25
1.75
VOUT (V)
+0.2
DIFFERENTIAL PHASE (°)
DIFFERENTIAL GAIN (%)
Differential Phase for RL Tied to 2.5V
RF = 0, AV = +1
55
+0.2
RL = 150Ω
+0.1
0
-0.1
RL = 10KΩ
+0.1
R
RLL ==10KΩ
0
R
RL == 150Ω
-0.1
-.02
-0.2
0.5
0.5
3.5
2.0
2.0
Differential Gain for RL Tied to 0V
RF = 1KΩ, AV = +2
Differential Phase for RL Tied to 0V
RF = 1KΩ, AV = +2
34
+0.2
DIFFERENTIAL PHASE (°)
+0.2
RL = 150Ω
+0.1
RL = 10KΩ
0
-0.1
-0.2
0.5
3.5
VOUT (V)
VOUT (V)
32
3.25
VOUT (V)
Differential Gain for RL Tied to 2.5V
RF = 0, AV = +1
56
DIFFERENTIAL GAIN (%)
EL5144C, EL5146C, EL5244C, EL5246C, EL5444C
EL5144C, EL5146C, EL5244C, EL5246C,
EL5444C
RL = 150Ω
+0.1
RL = 10KΩ
0
-0.1
-0.2
2.0
3.5
0.5
VOUT (V)
2.0
VOUT (V)
8
3.5
100 MHz Single Supply Rail to Rail Amplifier
Differential Gain for RL Tied to 2.5V
RF = 1KΩ, AV = +2
31
+0.2
+0.1
DIFFERENTIAL PHASE (°)
+0.2
DIFFERENTIAL GAIN (%)
Differential Phase for RL Tied to 2.5V
RF = 1KΩ, AV = +2
33
RL = 150Ω
0
-0.1
RL = 10KΩ
RL = 10KΩ
+0.1
0
-0.1
RL = 150Ω
-0.2
-0.2
0.5
0.5
3.5
2.0
2nd and 3rd Harmonic Distortion vs. Frequency
VOUT = 0.25V to 2.25V, RL = 100Ω to 0V
5
3.5
2.0
VOUT (V)
VOUT (V)
2nd and 3rd Harmonic Distortion vs.Frequency
VOUT = 0.5V to 2.5V, RL = 100Ω to 0V
6
-25
-25
-35
-35
DISTORTION (dBc)
DISTORTION (dBc)
HD3
HD3
-45
HD2
-55
-65
-45
HD2
-55
-65
-75
1M
10M
-75
1M
100M
FREQUENCY (Hz)
2nd and 3rd Harmonic Distortion vs. Frequency
VOUT = 1V to 3V, RL = 100Ω to 0V
7
0
-20
CROSSTALK (dB)
HD3
-35
DISTORTION (dBc)
100M
Channel to Channel Crosstalk- Duals and Quads
(Worst Channel)
27
-25
-45
HD2
-55
-40
-60
-80
-65
-75
1M
10M
FREQUENCY (Hz)
10M
-100
100K
100M
1M
10M
FREQUENCY (Hz)
FREQUENCY (Hz)
9
100M
EL5144C, EL5146C, EL5244C, EL5246C, EL5444C
EL5144C, EL5146C, EL5244C, EL5246C,
EL5444C
100 MHz Single Supply Rail to Rail Amplifier
Supply Current (per Amp) vs.
Supply Voltage
44
Output Current vs. Die Temperature
RL = 10Ω to 2.5V
45
120
100
OUTPUT CURRENT (mA)
SUPPLY CURRENT (mA)
8
6
4
2
Source
80
60
Sink
40
0
0
1
2
3
4
20
-55
5
-15
SUPPLY VOLTAGE (V)
8
4
SUPPLY CURRENT (µA)
SUPPLY CURRENT (mA)
5
7
6
5
-15
25
65
105
105
145
1
0
-55
-15
25
65
DIE TEMPERATURE (°C)
Negative Output Voltage Swing vs.
Die Temperature
41
5.0
0.5
OUTPUT VOLTAGE (V)
RL=150Ω to 2.5V
4.9
4.8
4.7
4.5
-55
145
2
145
Positive Output Voltage Swing vs. Die Temperature
RL = 150Ω
4.6
105
3
DIE TEMPERATURE (°C)
69
65
Supply Current - OFF (per amp) vs.
Die Temperature
47
9
4
-55
25
DIE TEMPERATURE (°C)
Supply Current - ON (per amp) vs.
Die Temperature
46
OUTPUT VOLTAGE (V)
EL5144C, EL5146C, EL5244C, EL5246C, EL5444C
EL5144C, EL5146C, EL5244C, EL5246C,
EL5444C
RL=150Ω to 0V
-15
25
65
105
0.4
0.3
0.2
RL=150Ω to 0V
0.1
0
-55
145
RL=150Ω to 2.5V
-15
25
65
DIE TEMPERATURE (°C)
DIE TEMPERATURE (°C)
10
105
145
100 MHz Single Supply Rail to Rail Amplifier
Output Voltage from Either Rail vs. Die Temperature
for Various Effective RLOAD
40
-20
300
100
-40
Effective RLOAD = 150Ω
MAGNITUDE (dBc)
OUTPUT VOLTAGE (mV)
OFF Isolation - EL5146C & EL5246C
71
Effective RLOAD = 1KΩ
Effective RLOAD = 5KΩ
10
EL 5146CS & EL5146CN
-60
EL5246CN
EL5246CS
-80
-100
Effective R LOAD = RL//RF to VS/2
1
-55
-15
25
65
105
-120
10k
145
100k
DIE TEMPERATURE (°C)
Maximum Power Dissipation vs. Ambient Temperature
Singles (TJMAX = 150°C)
67
PDIP, ΘJA = 110°C/W
1.6
POWER DISSIPATION (W)
POWER DISSIPATION (W)
100M
2.5
SOIC, ΘJA = 161°C/W
1.2
0.8
0.4
0
-50
-20
10
40
70
AMBIENT TEMPERATURE (°C)
SOIC-14, ΘJA = 120°C/W
1.0
0.5
2.5
PDIP-14, ΘJA = 83°C/W
1.5
1.0
0.5
SOIC-14, ΘJA = 118°C/W
QSOP-16, ΘJA = 158°C/W
0
-50
-20
10
40
70
SOIC-8, ΘJA = 159°C/W
MSOP-8,10, ΘJA = 206°C/W
-20
10
40
70
AMBIENT TEMPERATURE (°C)
Maximum Power Dissipation vs. Ambient Temperature
Quads (TJMAX = 150°C)
2.0
PDIP-8, ΘJA = 107°C/W
1.5
0
-50
100
PDIP-14, ΘJA = 87°C/W
2.0
SOT23-5, ΘJA = 256°C/W
POWER DISSIPATION (W)
10M
Maximum Power Dissipation vs. Ambient Temperature
Duals (TJMAX = 150°C)
66
2.0
68
1M
FREQUENCY (Hz)
100
AMBIENT TEMPERATURE (°C)
11
100
EL5144C, EL5146C, EL5244C, EL5246C, EL5444C
EL5144C, EL5146C, EL5244C, EL5246C,
EL5444C
100 MHz Single Supply Rail to Rail Amplifier
Pin Configurations
SOIC-14, PDIP-14
INA+ 1
MSOP-10
SOIC-8, PDIP-8, MSOP-8
8 VS
CEA 2
7 OUTB
GND 3
6 INB+
CEB 4
5 INB+
+
-
INB+ 5
EL5244C
14 INA+
CEA 3
12 NC
8 VS
GND 4
11 VS
7 OUTB
CEB 5
10 NC
NC 6
6 INBEL5246C
+
-
INB+ 7
QSOP-16
SOIC-14, PDIP-14
1
16 OUTD
INA-
2
15 IND-
INA+
3
14 IND+
VS
4
13 GND
VS
5
12 GND
INB+
6
11 INC+
INB-
7
OUTB
8
12 IND+
VS 4
11 GND
INB+ 5
10 INC+
+
-
9
INC-
8
OUTC
+
-
OUTB 7
+
13 IND-
INA+ 3
INB- 6
OUTA
14 OUTD
+
INA- 2
EL5444C
Single Amplifier Pin Configurations on Page 1
12
10 INC9 OUTC
EL5444C
9 OUTB
8 INB-
EL5246C
OUTA 1
13 OUTA
9 OUTA
+
-
INA+ 3
GND 4
+
+
+
+
-
INA- 2
NC 2
10 INA-
INA+ 1
OUTA 1
+
EL5144C, EL5146C, EL5244C, EL5246C, EL5444C
EL5144C, EL5146C, EL5244C, EL5246C,
EL5444C
100 MHz Single Supply Rail to Rail Amplifier
EL5144C
(SOT23-5)
EL5146C
(SO/PDIP)
EL5244C
(SO/PDIP/MSOP)
EL5246C
(MSOP)
EL5246C
(SO/PDIP)
EL5444C
(SO/PDIP)
EL5444C
(QSOP)
Pin Description
5
7
8
8
11
4
4,5
VS
2
4
4
3
4
11
12,13
GND
Ground or Negative Power Supply
3
3
IN+
Noninverting Input
Name
Function
Equivalent Circuit
Positive Power Supply
VS
GND
Circuit 1
4
2
IN-
1
6
OUT
Inverting Input
(Reference Circuit 1)
Amplifier Output
VS
GND
Circuit 2
3
1
1
3
3
INA+
Amplifier A Noninverting Input
(Reference Circuit 1)
2
10
14
2
1
9
13
1
2
INA-
Amplifier A Inverting Input
(Reference Circuit 1)
1
OUTA
Amplifier A Output
5
5
7
(Reference Circuit 2)
5
6
INB+
Amplifier B Noninverting Input
6
6
8
(Reference Circuit 1)
6
7
INB-
Amplifier B Inverting Input
(Reference Circuit 1)
7
7
9
(Reference Circuit 2)
7
8
OUTB
Amplifier B Output
10
11
INC+
Amplifier C Noninverting Input
(Reference Circuit 1)
9
10
INC-
Amplifier C Inverting Input
(Reference Circuit 1)
8
9
OUTC
Amplifier C Output
(Reference Circuit 2)
12
14
IND+
Amplifier D Noninverting Input
(Reference Circuit 1)
Amplifier D Inverting Input
(Reference Circuit 1)
Amplifier D Output
(Reference Circuit 2)
13
15
IND-
14
16
OUTD
13
EL5144C, EL5146C, EL5244C, EL5246C, EL5444C
EL5144C, EL5146C, EL5244C, EL5246C,
EL5444C
100 MHz Single Supply Rail to Rail Amplifier
EL5444C
(QSOP)
EL5444C
(SO/PDIP)
EL5246C
(SO/PDIP)
EL5246C
(MSOP)
EL5244C
(SO/PDIP/MSOP)
EL5146C
(SO/PDIP)
Pin Description
EL5144C
(SOT23-5)
EL5144C, EL5146C, EL5244C, EL5246C, EL5444C
EL5144C, EL5146C, EL5244C, EL5246C,
EL5444C
Name
8
CE
Function
Equivalent Circuit
Enable (Enabled when high)
VS
+
–
GND
Circuit 3
1,5
2
3
CEA
Enable Amplifier A (Enabled when high)
(Reference Circuit 3)
4
5
CEB
Enable Amplifier B (Enabled when high)
(Reference Circuit 3)
2,6,
10,12
NC
No Connect. Not internally connected.
14
1.4V
100 MHz Single Supply Rail to Rail Amplifier
Description of Operation and Applications Information
Product Description
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 GND pin becomes the negative supply rail.
The EL5144C series is a family of wide bandwidth, single supply, low power, rail-to-rail output, voltage
feedback operational amplifiers. The family includes
single, dual, and quad configurations. The singles and
duals are available with a power down pin to reduce
power to 2.6µA typically. All the amplifiers are internally compensated for closed loop feedback gains of +1
or greater. Larger gains are acceptable but bandwidth
will be reduced according to the familiar Gain-Bandwidth Product.
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, particularly for the SO package, should be avoided if possible. Sockets add parasitic
inductance and capacitance that can result in compromised performance.
Connected in voltage follower mode and driving a high
impedance load, the EL5144C series has a -3dB bandwidth of 100 MHz. Driving a 150Ω load, they have a
-3dB bandwidth of 60 MHz while maintaining a 200
V/µS slew rate. The input common mode voltage range
includes ground while the output can swing rail to rail.
Input, Output, and Supply Voltage Range
The EL5144C series has been designed to operate with a
single supply voltage of 5V. Split supplies can be used
so long as their total range is 5V.
The amplifiers have an input common mode voltage
range that includes the negative supply (GND pin) and
extends to within 1.5V of the positive supply (VS pin).
They are specified over this range.
Power Supply Bypassing and Printed Circuit
Board Layout
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. The power
supply pin must be well bypassed to reduce the risk of
oscillation For normal single supply operation, where
the GND pin is connected to the ground plane, a single
4.7 µF tantalum capacitor in parallel with a 0.1 µF
The output of the EL5144C series amplifiers can swing
rail to rail. As the load resistance becomes lower in
value, the ability to drive close to each rail is reduced.
However, even with an effective 150 Ω load resistor
connected to a voltage halfway between the supply rails,
the output will swing to within 150mV of either rail.
15
EL5144C, EL5146C, EL5244C, EL5246C, EL5444C
EL5144C, EL5146C, EL5244C, EL5246C,
EL5444C
EL5144C, EL5146C, EL5244C, EL5246C, EL5444C
EL5144C, EL5146C, EL5244C, EL5246C,
EL5444C
100 MHz Single Supply Rail to Rail Amplifier
+1. As this combination gets smaller, the bandwidth
falls off. Consequently, RF also has a minimum value
that should not be exceeded for optimum performance.
Figure 1 shows the output of the EL5144C series amplifier swinging rail to rail with RF = 1KΩ, AV = +2 and RL
= 1MΩ. Figure 2 is with RL = 150 Ω.
For AV = +1, RF = 0 Ω is optimum. For AV = -1 or +2
(noise gain of 2), optimum response is obtained with RF
between 300 Ω and 1K Ω. For AV = -4 or +5 (noise gain
of 5), keep RF between 300 Ω and 15K Ω.
5V
Video Performance
For good video signal integrity, an amplifier is required
to maintain the same output impedance and the same frequency response as DC levels are changed at the output.
This can be difficult when driving a standard video load
of 150Ω, because of the change in output current with
DC level. A look at the Differential Gain and Differential Phase curves for various supply and loading
conditions will help you obtain optimal performance.
Curves are provided for AV = +1 and +2, and RL = 150Ω
and 10 KΩ tied both to ground as well as 2.5V. As with
all video amplifiers, there is a common mode sweet spot
for optimum differential gain / differential phase. For
example, with AV = +2 and RL = 150Ω tied to 2.5V, and
the output common mode voltage kept between 0.8V
and 3.2V, dG/dP is a very low 0.1% / 0.1°. This condition corresponds to driving an AC-coupled, double
terminated 75Ω coaxial cable. With A V = +1, RL =
150Ω tied to ground, and the video level kept between
0.85V and 2.95V, these amplifiers provide dG/dP perfo rm ance of 0.05 % / 0.20 °. Th is c ond it ion is
representative of using the EL5144C series amplifier as
a buffer driving a DC coupled, double terminated, 75Ω
coaxial cable. Driving high impedance loads, such as
signals on computer video cards, gives similar or better
dG/dP performance as driving cables.
0V
Figure 1
5V
0V
Figure 2
Choice of Feedback Resistor, RF
These amplifiers are optimized for applications that
require a gain of +1. Hence, no feedback resistor is
required. However, for gains greater than +1, the feedback resistor forms a pole with the input capacitance. As
this pole becomes larger, phase margin is reduced. This
causes ringing in the time domain and peaking in the frequency domain. Therefore, R F has some maximum
value that should not be exceeded for optimum performance. If a large value of R F must be used, a small
capacitor in the few picofarad range in parallel with RF
can help to reduce this ringing and peaking at the
expense of reducing the bandwidth.
Driving Cables and Capacitive Loads
The EL5144C series amplifiers can drive 50pF loads in
parallel with 150 Ω with 4dB of peaking and 100pF with
7dB of peaking. If less peaking is desired in these applications, a small series resistor (usually between 5 Ω and
50 Ω) can be placed in series with the output to eliminate
most peaking. However, this will obviously reduce the
gain slightly. If your gain is greater than 1, the gain
resistor (RG) can then be chosen to make up for any gain
As far as the output stage of the amplifier is concerned,
RF + RG appear in parallel with RL for gains other than
16
100 MHz Single Supply Rail to Rail Amplifier
loss which may be created by this additional resistor at
the output. Another method of reducing peaking is to
add a “snubber” circuit at the output. A snubber is a
resistor in a series with a capacitor, 150Ω and 100pF
being typical values. The advantage of a snubber is that
it does not draw DC load current.
Power Dissipation
With the high output drive capability of the EL5144C
series amplifiers, it is possible to exceed the 150°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 load conditions or package
type need to be modified for the amplifier to remain in
the safe operating area.
When used as a cable driver, double termination is
always recommended for reflection-free performance.
For those applications, the back-termination series resistor will de-couple the EL5144C series 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 reduce peaking.
The maximum power dissipation allowed in a package is
determined according to:
Disable / Power-Down
T JMAX – T AMAX
PD MAX = ---------------------------------------------Θ JA
The EL5146C and EL5246C amplifiers can be disabled,
placing its output in a high-impedance state. Turn off
time is only 10 nsec and turn on time is around 500 nsec.
When disabled, the amplifier’s supply current is reduced
to 2.6µA typically, thereby effectively eliminating
power consumption. The amplifier’s power down can be
controlled by standard TTL or CMOS signal levels at the
CE pin. The applied logic signal is relative to the GND
pin. Letting the CE pin float will enable the amplifier.
Hence, the 8 pin PDIP and SOIC single amps are pin
compatible with standard amplifiers that don’t have a
power down feature.
where:
TJMAX = Maximum Junction Temperature
TAMAX = Maximum Ambient Temperature
θJA = Thermal Resistance of the Package
PDMAX = Maximum Power Dissipation
in 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:
Short Circuit Current Limit
The EL5144C series amplifiers do not have internal
short circuit protection circuitry. Short circuit current of
90 mA sourcing and 65 mA sinking typically will flow if
the output is trying to drive high or low but is shorted to
half way between the rails. If an 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 ±50mA.
This limit is set by internal metal interconnect limitations. Obviously, short circuit conditions must not
remain or the internal metal connections will be
destroyed.
V OUT

PD MAX = N •  V S • I SMAX + ( V S – V OUT ) • ----------------
RL 

where:
N = Number of amplifiers in the package
VS = Total Supply Voltage
17
EL5144C, EL5146C, EL5244C, EL5246C, EL5444C
EL5144C, EL5146C, EL5244C, EL5246C,
EL5444C
100 MHz Single Supply Rail to Rail Amplifier
ISMAX = Maximum Supply Current Per Amplifier
ure 4 is a graph of propagation delay vs. overdrive as a
square wave is presented at the input of the comparator.
VOUT = Maximum Output Voltage of the Application
RL = Load Resistance tied to Ground
+5V
1
8
EL5146C
If we set the two PDMAX equations equal to each other,
we can solve for RL:
VIN
+
–
2
3
0.1µF
7
+
VOUT
6
+2.5V
RL
4
5
Figure 3
V OUT • ( V S – V OUT )
R L = --------------------------------------------------------------------------------------------- T JMAX – T AMAX
 ---------------------------------------------- – ( V S • I SMAX )
N • Θ JA


8
Propagation Delay vs. Overdrive for Amplifier Used as a
Comparator
1000
Assuming worst case conditions of TA = +85°C, Vout =
VS/2 V, VS = 5.5V, and ISMAX = 8.8mA per amplifier,
below is a table of all packages and the minimum RL
allowed.
Part
Package
Minimum RL
EL5144CW
SOT23-5
37
EL5146CS
SOIC-8
21
EL5146CN
PDIP-8
14
EL5244CS
SOIC-8
48
EL5244CN
PDIP-8
30
EL5244CY
MSOP-8
69
EL5246CY
MSOP-10
69
34
EL5246CS
SOIC-14
EL5246CN
PDIP-14
23
EL5444CU
QSOP-16
139
EL5444CS
SOIC-14
85
EL5444CN
PDIP-14
51
PROPAGATION DELAY(nsec)
EL5144C, EL5146C, EL5244C, EL5246C, EL5444C
EL5144C, EL5146C, EL5244C, EL5246C,
EL5444C
Negative Going Signal
100
Positive Going Signal
10
0.01
0.1
1.0
OVERDRIVE (V)
Figure 4
Multiplexing with the EL5144C Series
Amplifier
Besides normal power down usage, the CE (Chip
Enable) pin on the EL5146C and EL5246C series amplifiers also allow for multiplexing applications. Figure 5
shows an EL5246C with its outputs tied together, driving a back terminated 75Ω video load. A 3 Vp-p 10 MHz
sine wave is applied at Amp A input, and a 2.4 Vp-p 5
MHz square wave to Amp B. Figure 6 shows the
SELECT signal that is applied, and the resulting output
waveform at VOUT . Observe the break-before-make
operation of the multiplexing. Amp A is on and VIN1 is
being passed through to the output of the amplifier. Then
Amp A turns off in about 10 nsec. The output decays to
EL5144C Series Comparator Application
The EL5144C series amplifier can be used as a very fast,
single supply comparator. Most op amps used as a comparator allow only slow speed operation because of
output saturation issues. The EL5144C series amplifier
doesn’t suffer from output saturation issues. Figure 3
shows the amplifier implemented as a comparator. Fig-
18
100 MHz Single Supply Rail to Rail Amplifier
ground with an RL CL time constants. 500 nsec later,
Amp B turns on and VIN2 is passed through to the output. This break-before-make operation ensures that more
than one amplifier isn’t trying to drive the bus at the
same time. Notice the outputs are tied directly together.
Isolation resistors at each output are not necessary.
VIN 1
3V PP
10MHz
1
2
Free Running Oscillator Application
Figure 7 is an EL5144C configured as a free running
oscillator. To first order, ROSC and COSC determine the
frequency of oscillation according to:
0.72
F OSC = -----------------------------------R OSC • C
14
OSC
VOUT
+
13
3
12
EL5246C
For rail to rail output swings, maximum frequency of
oscillation is around 15 MHz. If reduced output swings
are acceptable, 25 MHz can be achieved. Figure 8 shows
the oscillator for ROSC = 510 Ω, COSC = 240 pF and
FOSC = 6 MHz.
+5V
4
11
5
10
Select
6
VIN 2
2.4V PP
5MHz
+
-
4.7µF
0.1µF
9
150Ω
7
8
470K
+5V
Figure 5
1
5
470K
3
ROSC
4
470K
COSC
VOUT
Figure 7
0V
5V
Select
0V
5V
Figure 6
VOUT
0V
Figure 8
19
0.1µF
+
2
5V
EL5144C, EL5146C, EL5244C, EL5246C, EL5444C
EL5144C, EL5146C, EL5244C, EL5246C,
EL5444C
EL5144C, EL5146C, EL5244C, EL5246C, EL5444C
EL5144C, EL5146C, EL5244C, EL5246C,
EL5444C
100 MHz Single Supply Rail to Rail Amplifier
General Disclaimer
Specifications contained in this data sheet are in effect as of the publication date shown. Elantec, Inc. reserves the right to make changes in the circuitry or specifications contained herein at any time without notice. Elantec, Inc. assumes no responsibility for the use of any circuits described
herein and makes no representations that they are free from patent infringement.
WARNING - Life Support Policy
Elantec, Inc. products are not authorized for and should not be used
within Life Support Systems without the specific written consent of
Elantec, Inc. Life Support systems are equipment intended to support or sustain life and whose failure to perform when properly used
in accordance with instructions provided can be reasonably
expected to result in significant personal injury or death. Users contemplating application of Elantec, Inc. Products in Life Support
Systems are requested to contact Elantec, Inc. factory headquarters
to establish suitable terms & conditions for these applications. Elantec, Inc.’s warranty is limited to replacement of defective
components and does not cover injury to persons or property or
other consequential damages.
March 1, 2000
Elantec Semiconductor, Inc.
675 Trade Zone Blvd.
Milpitas, CA 95035
Telephone: (408) 945-1323
Fax:
(408) 945-9305
Toll Free: 1 - (888) ELANTEC
Web Site: http://www.elantec.com
European Office: 44-118-977-6020
Japan Tech Center: 81-45-682-5820
20
Printed in U.S.A.