Elantec EL5420CS-T7 12mhz rail-to-rail input-output op amp Datasheet

12MHz Rail-to-Rail Input-Output Op Amps
Features
General Description
• 12MHz -3dB bandwidth
• Supply voltage = 4.5V to 16.5V
• Low supply current (per amplifier)
= 500µA
• High slew rate = 10V/µs
• Unity-gain stable
• Beyond the rails input capability
• Rail-to-rail output swing
• Ultra-small package
The EL5420C and EL5220C are low power, high voltage, rail-to-rail
input-output amplifiers. The EL5220C contains two amplifiers in one
package, and the EL5420C contains four amplifiers. Operating on supplies ranging from 5V to 15V, while consuming only 500µA per
amplifier, the EL5420C and EL5220C have a bandwidth of 12MHz -(-3dB). They also provide common mode input ability beyond the supply rails, as well as rail-to-rail output capability. This enables these
amplifiers to offer maximum dynamic range at any supply voltage.
Applications
•
•
•
•
•
•
•
•
•
•
•
•
TFT-LCD drive circuits
Electronics notebooks
Electronics games
Touch-screen displays
Personal communication devices
Personal digital assistants (PDA)
Portable instrumentation
Sampling ADC amplifiers
Wireless LANs
Office automation
Active filters
ADC/DAC buffer
The EL5420C and EL5220C also feature fast slewing and settling
times, as well as a high output drive capability of 30mA (sink and
source). These features make these amplifiers ideal for use as voltage
reference buffers in Thin Film Transistor Liquid Crystal Displays
(TFT-LCD). Other applications include battery power, portable
devices, and anywhere low power consumption is important.
The EL5420C is available in a space-saving 14-pin TSSOP package,
the industry-standard 14-pin SO package, as well as a 16-pin LPP
package. The EL5220C is available in the 8-pin MSOP package. Both
feature a standard operational amplifier pin out. These amplifiers are
specified for operation over the full -40°C to +85°C temperature
range.
Connection Diagrams
VOUTA 1
Ordering Information
Package
EL5220CY
8-Pin MSOP
-
MDP0043
EL5220CY-T7
8-Pin MSOP
7”
MDP0043
EL5220CY-T13
8-Pin MSOP
13”
MDP0043
EL5420CL
16-Pin LPP
-
MDP0046
EL5420CL-T7
16-Pin LPP
7”
MDP0046
Part No.
EL5420CL-T13
14 VOUTD
VINA- 2
Tape &
Reel
Outline #
13”
MDP0046
14-Pin TSSOP
-
MDP0044
EL5420CR-T7
14-Pin TSSOP
7”
MDP0044
EL5420CR-T13
14-Pin TSSOP
13”
MDP0044
EL5420CS
14-Pin SO
-
MDP0027
EL5420CS-T7
14-Pin SO
7”
MDP0027
EL5420CS-T13
14-Pin SO
13”
MDP0027
VINA+ 3
13 VIND+
+
VS+ 4
11 VS-
VINB+ 5
VINB- 6
VOUTB 7
12 VIND+
+
-
+
-
VOUTA 1
10 VINC+
VINA- 2
9 VINC-
VINA+ 3
8 VOUTC
EL5420C
(14-Pin TSSOP & 14-Pin SO)
8 VS+
+
7 VOUTB
+
VS- 4
6 VINB5 VINB+
EL5220C
(8-Pin MSOP)
Connection Diagrams are continued on page 4
Note: All information contained in this data sheet has been carefully checked and is believed to be accurate as of the date of publication; however, this data sheet cannot be a “controlled document”. Current revisions, if any, to these
specifications are maintained at the factory and are available upon your request. We recommend checking the revision level before finalization of your design documentation.
© 2001 Elantec Semiconductor, Inc.
September 19, 2001
16-Pin LPP
EL5420CR
EL5220C, EL5420C
EL5220C, EL5420C
EL5220C, EL5420C
EL5220C, EL5420C
12MHz Rail-to-Rail Input-Output Op Amps
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
Supply Voltage between VS+ and VS+18V
Input Voltage
VS- - 0.5V, VS +0.5V
Maximum Continuous Output Current
30mA
Maximum Die Temperature
Storage Temperature
Operating Temperature
Power Dissipation
ESD Voltage
+125°C
-65°C to +150°C
-40°C to +85°C
See Curves
2kV
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, VS - = -5V, RL = 10kΩ and CL = 10pF to 0V, TA = 25°C unless otherwise specified.
Parameter
Description
Condition
Min
Typ
Max
12
Unit
Input Characteristics
VOS
Input Offset Voltage
VCM = 0V
2
TCVOS
Average Offset Voltage Drift
[1]
5
IB
Input Bias Current
VCM = 0V
2
RIN
Input Impedance
CIN
Input Capacitance
CMIR
Common-Mode Input Range
CMRR
Common-Mode Rejection Ratio
for VIN from -5.5V to +5.5V
50
70
dB
AVOL
Open-Loop Gain
-4.5V ≤ VOUT ≤ +4.5V
75
95
dB
50
1
nA
GΩ
1.35
-5.5
mV
µV/°C
pF
+5.5
V
Output Characteristics
VOL
Output Swing Low
IL = -5mA
VOH
Output Swing High
IL = 5mA
ISC
IOUT
-4.92
4.85
-4.85
V
4.92
V
Short Circuit Current
±120
mA
Output Current
±30
mA
Power Supply Performance
PSRR
Power Supply Rejection Ratio
VS is moved from ±2.25V to ±7.75V
IS
Supply Current (Per Amplifier)
No load
60
80
500
dB
750
µA
Dynamic Performance
SR
Slew Rate [2]
-4.0V ≤ VOUT ≤ +4.0V, 20% to 80%
10
tS
Settling to +0.1% (AV = +1)
(AV = +1), V O = 2V step
500
ns
BW
-3dB Bandwidth
RL = 10kΩ, CL = 10pF
12
MHz
GBWP
Gain-Bandwidth Product
RL = 10kΩ, CL = 10pF
8
MHz
PM
Phase Margin
RL = 10kΩ, CL = 10 pF
50
°
CS
Channel Separation
f = 5MHz
75
dB
1. Measured over operating temperature range
2. Slew rate is measured on rising and falling edges
2
V/µs
Electrical Characteristics
VS+ = 5V, VS-= 0V, R L = 10kΩ and CL = 10pF to 2.5V, TA = 25°C unless otherwise specified.
Parameter
Description
Condition
Min
Typ
Max
10
Unit
Input Characteristics
VOS
Input Offset Voltage
VCM = 2.5V
2
TCVOS
Average Offset Voltage Drift
[1]
5
IB
Input Bias Current
VCM = 2.5V
2
RIN
Input Impedance
CIN
Input Capacitance
CMIR
Common-Mode Input Range
CMRR
Common-Mode Rejection Ratio
for VIN from -0.5V to +5.5V
45
66
dB
AVOL
Open-Loop Gain
0.5V ≤ VOUT ≤+ 4.5V
75
95
dB
4.85
4.92
V
50
1
nA
GΩ
1.35
-0.5
mV
µV/°C
pF
+5.5
V
Output Characteristics
VOL
Output Swing Low
IL = -5mA
VOH
Output Swing High
IL = +5mA
80
150
mV
ISC
Short Circuit Current
±120
mA
IOUT
Output Current
±30
mA
Power Supply Performance
PSRR
Power Supply Rejection Ratio
VS is moved from 4.5V to 15.5V
IS
Supply Current (Per Amplifier)
No load
60
80
500
dB
750
µA
Dynamic Performance
SR
Slew Rate [2]
1V ≤ VOUT ≤ 4V, 20% to 80%
10
tS
Settling to +0.1% (AV = +1)
(AV = +1), V O = 2V step
500
ns
BW
-3dB Bandwidth
RL = 10kΩ, CL = 10pF
12
MHz
GBWP
Gain-Bandwidth Product
RL = 10 kΩ, CL = 10pF
8
MHz
PM
Phase Margin
RL = 10 kΩ, CL = 10 pF
50
°
CS
Channel Separation
f = 5MHz
75
dB
V/µs
1. Measured over operating temperature range
2. Slew rate is measured on rising and falling edges
Electrical Characteristics
VS+ = 15V, VS- = 0V, RL = 10kΩ and C L = 10pF to 7.5V, TA = 25°C unless otherwise specified.
Parameter
Description
Condition
Min
Typ
Max
14
Unit
Input Characteristics
VOS
Input Offset Voltage
VCM = 7.5V
2
TCVOS
Average Offset Voltage Drift
[1]
5
IB
Input Bias Current
VCM = 7.5V
2
RIN
Input Impedance
CIN
Input Capacitance
CMIR
Common-Mode Input Range
CMRR
Common-Mode Rejection Ratio
for VIN from -0.5V to +15.5V
53
72
dB
AVOL
Open-Loop Gain
0.5V ≤ VOUT ≤ 14.5V
75
95
dB
14.85
14.92
50
1
nA
GΩ
1.35
-0.5
mV
µV/°C
pF
+15.5
V
Output Characteristics
VOL
Output Swing Low
IL = -5mA
VOH
Output Swing High
IL = +5mA
80
3
150
mV
V
EL5220C, EL5420C
EL5220C, EL5420C
12MHz Rail-to-Rail Input-Output Op Amps
12MHz Rail-to-Rail Input-Output Op Amps
Electrical Characteristics (Continued)
VS+ = 15V, VS- = 0V, RL = 10kΩ and C L = 10pF to 7.5V, TA = 25°C unless otherwise specified.
Parameter
Description
Condition
Min
Typ
Max
Unit
ISC
Short Circuit Current
±120
mA
IOUT
Output Current
±30
mA
Power Supply Performance
PSRR
Power Supply Rejection Ratio
VS is moved from 4.5V to 15.5V
IS
Supply Current (Per Amplifier)
No load
60
80
500
dB
750
µA
Dynamic Performance
SR
Slew Rate [2]
1V ≤ VOUT ≤ 14V, 20% to 80%
10
tS
Settling to +0.1% (AV = +1)
(AV = +1), V O = 2V step
500
ns
BW
-3dB Bandwidth
RL = 10kΩ, CL = 10pF
12
MHz
GBWP
Gain-Bandwidth Product
RL = 10kΩ, CL = 10pF
8
MHz
PM
Phase Margin
RL = 10kΩ, CL = 10 pF
50
°
CS
Channel Separation
f = 5MHz
75
dB
1. Measured over operating temperature range
2. Slew rate is measured on rising and falling edges
13 NC
14 VOUTD
15 VOUTA
16 NC
Connection Diagrams (Continued)
VINA- 1
12 VIND-
VINA+ 2
11 VIND+
Thermal Pad
VS+ 3
10 VS-
EL5420C
(16-Pin LPP)
4
VINC- 8
VOUTC 7
9 VINC+
VOUTB 6
VINB+ 4
VINB- 5
EL5220C, EL5420C
EL5220C, EL5420C
V/µs
Typical Performance Curves
EL5420C Input Offset Voltage Drift
EL5420C Input Offset Voltage Distribution
70
1800
1200
1000
800
600
400
50
40
30
20
10
200
21
19
17
15
13
9
Input Offset Voltage Drift, TCVOS (µV/°C)
Input Offset Voltage (mV)
Input Offset Voltage vs Temperature
Input Bias Current vs Temperature
10
2.0
Input Bias Current (nA)
VS=±5V
5
0
-5
VS=±5V
0.0
-2.0
-50
0
50
100
150
-50
0
Temperature (°C)
50
100
150
100
150
Temperature (°C)
Output High Voltage vs Temperature
Output Low Voltage vs Temperature
4.97
-4.91
-4.92
VS=±5V
IOUT=5mA
4.96
Output Low Voltage (V)
Output High Voltage (V)
11
7
5
1
12
8
10
6
4
2
-0
-2
-4
-6
-8
-10
-12
3
0
0
Input Offset Voltage (mV)
Typical
Production
Distribution
VS=±5V
60
Quantity (Amplifiers)
1400
Quantity (Amplifiers)
Typical
Production
Distribution
VS=±5V
TA=25°C
1600
4.95
4.94
VS=±5V
IOUT=-5mA
-4.93
-4.94
-4.95
-4.96
4.93
-50
0
50
100
-4.97
150
Temperature (°C)
-50
0
50
Temperature (°C)
5
EL5220C, EL5420C
EL5220C, EL5420C
12MHz Rail-to-Rail Input-Output Op Amps
12MHz Rail-to-Rail Input-Output Op Amps
Typical Performance Curves
Slew Rate vs Temperature
Open-Loop Gain vs Temperature
10.40
VS=±5V
VS=±5V
RL=10kΩ
Slew Rate (V/µS)
Open-Loop Gain (dB)
100
90
80
10.35
10.30
10.25
-50
0
50
100
0
-50
150
50
100
150
Temperature (°C)
Temperature (°C)
EL5420C Supply Current per Amplifier vs Supply Voltage
EL5420C Supply Current per Amplifier vs Temperature
700
TA=25°C
VS=±5V
Supply Current (µA)
Supply Current (mA)
0.55
0.5
600
500
400
0.45
-50
0
50
100
300
150
5
0
Temperature (°C)
50
-130
0
10
100
1k
-180
Gain
10k
100k
1M
Phase(°)
-80
Magnitude (Normalized) (dB)
-30
Phase
100
-50
5
20
VS=±5V, TA=25°C
RL=10KΩ to GND
CL=12pF to GND
20
Frequency Response for Various RL
200
150
15
10
Supply Voltage (V)
Open Loop Gain and Phase vs Frequency
Gain (dB)
EL5220C, EL5420C
EL5220C, EL5420C
10M
10kΩ
0
-5
1kΩ
CL=10pF
AV=1
VS=±5V
150Ω
-10
-15
100k
-230
100M
560Ω
1M
10M
Frequency (Hz)
Frequency (Hz)
6
100M
Typical Performance Curves
Frequency Response for Various CL
Closed Loop Output Impedance vs Frequency
200
RL=10kΩ
AV=1
VS=±5V
10
12pF
0
50pF
-10
100pF
-20
120
80
40
1000pF
-30
100k
AV=1
VS=±5V
TA=25°C
160
Output Impedance (Ω)
Magnitude (Normalized) (dB)
20
1M
0
10k
100M
10M
Maximum Output Swing vs Frequency
CMRR vs Frequency
80
10
60
8
CMRR (dB)
Maximum Output Swing (VP-P)
10M
Frequency (Hz)
12
6
VS=±5V
TA=25°C
AV=1
RL=10kΩ
CL=12pF
Distortion <1%
4
2
0
10k
40
20
VS=±5V
TA=25°C
100
1M
0
100
10M
1k
10k
10M
600
PSRR+
Voltage Noise (nV√Hz)
PSRR-
60
1M
Input Voltage Noise Spectral Density vs Frequency
PSRR vs Frequency
80
100k
Frequency (Hz)
Frequency (Hz)
PSRR (dB)
1M
100
Frequency (Hz)
40
20
100
10
VS=±5V
TA=25°C
0
100
1k
10k
100k
1M
1
100
10M
Frequency (Hz)
7
1k
10k
100k
1M
Frequency (Hz)
10M
100M
EL5220C, EL5420C
EL5220C, EL5420C
12MHz Rail-to-Rail Input-Output Op Amps
12MHz Rail-to-Rail Input-Output Op Amps
Typical Performance Curves
Total Harmonic Distortion + Noise vs Frequency
Channel Separation vs Frequency Response
0.010
-60
Dual measured Channel A to B
Quad measured Channel A to D or B to C
Other combinations yield improved rejection
0.009
0.008
-80
VS=±5V
RL=10kΩ
AV=1
VIN=220mVRMS
X-Talk (dB)
THD+ N (%)
0.007
0.006
0.005
0.004
VS=±5V
RL=10kΩ
AV=1
VIN=1VRMS
0.003
0.002
1k
-100
-120
0.001
10k
Frequency (Hz)
-140
100k
100k
1M
VS=±5V
AV=1
RL=10kΩ
CL=12pF
TA=25°C
4
3
2
Step Size (V)
70
10k
6M
Settling Time vs Step Size
VS=±5V
AV=1
RL=10kΩ
VIN=±50mV
TA=25°C
90
1k
Frequency (Hz)
Small-Signal Overshoot vs Load Capacitance
Overshoot (%)
EL5220C, EL5420C
EL5220C, EL5420C
50
30
1
0.1%
0
-1
-2
0.1%
-3
-4
10
10
100
Load Capacitance (pF)
0
1000
400
600
800
Settling Time (nS)
Large Signal Transient Response
1V
200
Small Signal Transient Response
1µS
50mV
200ns
VS=±5V
TA=25°C
AV=1
RL=10kΩ
CL=12pF
VS=±5V
TA=25°C
AV=1
RL=10kΩ
CL=12pF
8
Pin Descriptions
EL5420C
EL5220C
Pin Name
1
1
VOUTA
Pin Function
Equivalent Circuit
Amplifier A Output
VS+
VS-
GND
Circuit 1
2
2
VINA-
Amplifier A Inverting Input
VS+
VSCircuit 2
3
3
VINA+
Amplifier A Non-Inverting Input
(Reference Circuit 2)
4
8
VS+
5
5
VINB+
Amplifier B Non-Inverting Input
(Reference Circuit 2)
6
6
VINB-
Amplifier B Inverting Input
(Reference Circuit 2)
7
7
VOUTB
Amplifier B Output
(Reference Circuit 1)
8
VOUTC
Amplifier C Output
(Reference Circuit 1)
9
VINC-
Amplifier C Inverting Input
(Reference Circuit 2)
10
VINC+
Amplifier C Non-Inverting Input
(Reference Circuit 2)
11
4
VS-
Positive Power Supply
Negative Power Supply
12
VIND+
Amplifier D Non-Inverting Input
(Reference Circuit 2)
13
VIND-
Amplifier D Inverting Input
(Reference Circuit 2)
14
VOUTD
Amplifier D Output
(Reference Circuit 1)
9
EL5220C, EL5420C
EL5220C, EL5420C
12MHz Rail-to-Rail Input-Output Op Amps
12MHz Rail-to-Rail Input-Output Op Amps
Applications Information
Product Description
Figure 1. Operation with Rail-to-Rail Input and
Output
Operating Voltage, Input, and Output
Short Circuit Current Limit
The EL5220C and EL5420C are specified with a single
nominal supply voltage from 5V to 15V or a split supply
with its total range from 5V to 15V. Correct operation is
guaranteed for a supply range of 4.5V to 16.5V. Most
EL5220C and EL5420C specifications are stable over
both the full supply range and operating temperatures of
-40 °C to +85 °C. Parameter variations with operating
voltage and/or temperature are shown in the typical performance curves.
The EL5220C and EL5420C will limit the short circuit
current to ±120mA if the output is directly shorted to the
positive or the negative supply. If an output is shorted
indefinitely, the power dissipation could easily increase
such that the device may be damaged. Maximum reliability is maintained if the output continuous current
never exceeds ±30 mA. This limit is set by the design of
the internal metal interconnects.
VS=±5V
TA=25°C
AV=1
VIN=10VP-P
Input
The EL5220C and EL5420C voltage feedback amplifiers are fabricated using a high voltage CMOS process.
They exhibit rail-to-rail input and output capability, they
are unity gain stable, and have low power consumption
(500µA per amplifier). These features make the
EL5220C and EL5420C ideal for a wide range of general-purpose applications. Connected in voltage follower
mode and driving a load of 10kΩ and 12pF, the
EL5220C and EL5420C have a -3dB bandwidth of
12MHz while maintaining a 10V/µs slew rate. The
EL5220C is a dual amplifier while the EL5420C is a
quad amplifier.
Output
EL5220C, EL5420C
EL5220C, EL5420C
Output Phase Reversal
The input common-mode voltage range of the EL5220C
and EL5420C extends 500mV beyond the supply rails.
The output swings of the EL5220C and EL5420C typically extend to within 80mV of positive and negative
supply rails with load currents of 5mA. Decreasing load
currents will extend the output voltage range even closer
to the supply rails. Figure 1 shows the input and output
waveforms for the device in the unity-gain configuration. Operation is from ±5V supply with a 10kΩ load
connected to GND. The input is a 10VP-P sinusoid. The
output voltage is approximately 9.985VP-P.
The EL5220C and EL5420C are immune to phase reversal as long as the input voltage is limited from (VS-) ----0.5V to (VS+) +0.5V. Figure 2 shows a photo of the
output of the device with the input voltage driven
beyond the supply rails. Although the device's output
will not change phase, the input's overvoltage should be
avoided. If an input voltage exceeds supply voltage by
more than 0.6V, electrostatic protection diodes placed in
the input stage of the device begin to conduct and overvoltage damage could occur.
10
when sourcing, and:
1V
100µs
P DMAX = Σi × [ V S × I SMAX + ( V OUT i – V S - ) × I LOAD i ]
when sinking.
where
i = 1 to 2 for Dual and 1 to 4 for Quad
VS=±2.5V
TA=25°C
AV=1
VIN=6VP-P
VS = Total Supply Voltage
ISMAX = Maximum Supply Current Per Amplifier
1V
VOUTi = Maximum Output Voltage of the Application
Figure 2. Operation with Beyond-the-Rails
Input
ILOADi = Load Current
If we set the two PDMAX equations equal to each other,
we can solve for RLOADi to avoid device overheat. Figures 3, 4, and 5 provide a convenient way to see if the
device will overheat. The maximum safe power dissipation can be found graphically, based on the package type
and the ambient temperature. By using the previous
equation, it is a simple matter to see if PDMAX exceeds
the device's power derating curves. To ensure proper
operation, it is important to observe the recommended
derating curves in Figures 3, 4, and 5.
Power Dissipation
With the high-output drive capability of the EL5220C
and EL5420C amplifiers, it is possible to exceed the
125°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 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:
1200
T JMAX – T AMAX
P DMAX = -----------------------------------------------Θ JA
JEDEC JESD51-7 High Effective Thermal Conductivity (4Layer) Test Board
LPP exposed diepad soldered to PCB per JESD51-5
Power Dissipation (mW)
where:
TJMAX = Maximum Junction Temperature
TAMAX= Maximum Ambient Temperature
θJA = Thermal Resistance of the Package
MAX TJ=125°C
1.136W
1000
TSSOP14
θJA=100°C/W
1.0W
800 870mW
SO14
θJA=88°C/W
600
MSOP8
θJA=115°C/W
400
200
PDMAX = Maximum Power Dissipation in the Package
0
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
loads, or:
0
25
50
75 85
100
125
150
Ambient Temperature (°C)
Figure 3. Package Power Dissipation vs
Ambient Temperature
P DMAX = Σi × [ V S × I SMAX + ( V S + – V OUT i ) × I LOAD i ]
11
EL5220C, EL5420C
EL5220C, EL5420C
12MHz Rail-to-Rail Input-Output Op Amps
12MHz Rail-to-Rail Input-Output Op Amps
1200
the peaking increase. The amplifiers drive 10pF loads in
parallel with 10kΩ with just 1.5dB of peaking, and
100pF with 6.4dB of peaking. If less peaking is desired
in these applications, a small series resistor (usually
between 5Ω and 50Ω) can be placed in series with the
output. However, this will obviously reduce the gain
slightly. Another method of reducing peaking is to add a
“snubber” circuit at the output. A snubber is a shunt load
consisting of a resistor in series with a capacitor. Values
of 150Ω and 10nF are typical. The advantage of a snubber is that it does not draw any DC load current or
reduce the gain
JEDEC JESD51-3 and SEMI G42-88 (Single Layer) Test
Board
MAX TJ=125°C
1000
SO14
θJA=120°C/W
Power Dissipation (mW)
833mW
800
LPP16
θJA=150°C/W
667mW
600
606mW
TSSOP14
θJA=165°C/W
400 485mW
MSOP8
θJA=206°C/W
200
0
0
25
50
75 85
100
125
150
Power Supply Bypassing and Printed Circuit
Board Layout
Ambient Temperature (°C)
Figure 4. Package Power Dissipation vs
Ambient Temperature
3
The EL5220C and EL5420C can provide gain at high
frequency. 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
and the power supply pins must be well bypassed to
reduce the risk of oscillation. For normal single supply
operation, where the VS- pin is connected to ground, a
0.1µF ceramic capacitor should be placed from VS+ to
pin to VS- pin. A 4.7µF tantalum capacitor should then
be connected in parallel, placed in the region of the
amplifier. One 4.7µF capacitor may be used for multiple
devices. This same capacitor combination should be
placed at each supply pin to ground if split supplies are
to be used.
JEDEC JESD51-7 High Effective Thermal Conductivity (4Layer) Test Board
(LPP exposed diepad soldered to PCB per JESD51-5)
2.500W
2.5
Power Dissipation (W)
EL5220C, EL5420C
EL5220C, EL5420C
LP
P1
40
6
°C
/W
2
1.5
1
0.5
0
0
25
50
75 85
100
125
150
Ambient Temperature (°C)
Figure 5. Package Power Dissipation vs
Ambient Temperature
Unused Amplifiers
It is recommended that any unused amplifiers in a dual
and a quad package be configured as a unity gain follower. The inverting input should be directly connected
to the output and the non-inverting input tied to the
ground plane.
Driving Capacitive Loads
The EL5220C and EL5420C can drive a wide range of
capacitive loads. As load capacitance increases, however, the -3dB bandwidth of the device will decrease and
12
EL5220C, EL5420C
EL5220C, EL5420C
12MHz Rail-to-Rail Input-Output Op Amps
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.
September 19, 2001
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.
Elantec Semiconductor, Inc.
675 Trade Zone Blvd.
Milpitas, CA 95035
Telephone: (408) 945-1323
(888) ELANTEC
Fax:
(408) 945-9305
European Office: +44-118-977-6020
Japan Technical Center: +81-45-682-5820
13
Printed in U.S.A.
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