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EL5420C Schematic ( PDF Datasheet ) - Elantec Semiconductor

Teilenummer EL5420C
Beschreibung 12MHz Rail-to-Rail Input-Output Op Amps
Hersteller Elantec Semiconductor
Logo Elantec Semiconductor Logo 




Gesamt 13 Seiten
EL5420C Datasheet, Funktion
EL5220C, EL5420C
12MHz Rail-to-Rail Input-Output Op Amps
Features
• 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
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
Ordering Information
Part No.
EL5220CY
EL5220CY-T7
EL5220CY-T13
EL5420CL
EL5420CL-T7
EL5420CL-T13
EL5420CR
EL5420CR-T7
EL5420CR-T13
EL5420CS
EL5420CS-T7
EL5420CS-T13
Package
8-Pin MSOP
8-Pin MSOP
8-Pin MSOP
16-Pin LPP
16-Pin LPP
16-Pin LPP
14-Pin TSSOP
14-Pin TSSOP
14-Pin TSSOP
14-Pin SO
14-Pin SO
14-Pin SO
Tape &
Reel
-
7”
13”
-
7”
13”
-
7”
13”
-
7”
13”
Outline #
MDP0043
MDP0043
MDP0043
MDP0046
MDP0046
MDP0046
MDP0044
MDP0044
MDP0044
MDP0027
MDP0027
MDP0027
General Description
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 sup-
plies 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 sup-
ply rails, as well as rail-to-rail output capability. This enables these
amplifiers to offer maximum dynamic range at any supply voltage.
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
14 VOUTD
VINA- 2
VINA+ 3
-
+
13 VIND-
-
+ 12 VIND+
VS+ 4
11 VS-
VINB+ 5
VINB- 6
+
-
10 VINC+
+
- 9 VINC-
VOUTB 7
8 VOUTC
EL5420C
(14-Pin TSSOP & 14-Pin SO)
VOUTA 1
8 VS+
VINA- 2
VINA+ 3
-
+
VS- 4
7 VOUTB
- 6 VINB-
+
5 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.






EL5420C Datasheet, Funktion
EL5220C, EL5420C
12MHz Rail-to-Rail Input-Output Op Amps
Typical Performance Curves
Open-Loop Gain vs Temperature
100
90
VS=±5V
RL=10k
80
-50 0 50 100 150
Temperature (°C)
EL5420C Supply Current per Amplifier vs Temperature
0.55
VS=±5V
0.5
0.45
-50
0 50 100
Temperature (°C)
150
Open Loop Gain and Phase vs Frequency
200
20
150
Phase
100
-30
-80
50 -130
VS=±5V, TA=25°C
RL=10Kto GND
0 CL=12pF to GND
Gain -180
-50 -230
10 100 1k 10k 100k 1M 10M 100M
Frequency (Hz)
Slew Rate vs Temperature
10.40
10.35
VS=±5V
10.30
10.25
-50 0 50 100 150
Temperature (°C)
EL5420C Supply Current per Amplifier vs Supply Voltage
700
TA=25°C
600
500
400
300
0
5 10 15
Supply Voltage (V)
20
Frequency Response for Various RL
5
0
-5
CL=10pF
AV=1
VS=±5V
-10
10k
1k
560
150
-15
100k
1M 10M
Frequency (Hz)
100M
6

6 Page









EL5420C pdf, datenblatt
EL5220C, EL5420C
12MHz Rail-to-Rail Input-Output Op Amps
JEDEC JESD51-3 and SEMI G42-88 (Single Layer) Test
Board
1200
MAX TJ=125°C
1000
833mW
SO14
θJA=120°C/W
800
667mW
600 606mW
400 485mW
LPP16
θJA=150°C/W
TSSOP14
θJA=165°C/W
200 MSOP8
θJA=206°C/W
0
0 25 50 75 85 100 125 150
Ambient Temperature (°C)
Figure 4. Package Power Dissipation vs
Ambient Temperature
JEDEC JESD51-7 High Effective Thermal Conductivity (4-
Layer) Test Board
(LPP exposed diepad soldered to PCB per JESD51-5)
3
2.500W
2.5
2
1.5
40°CL/WPP16
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 fol-
lower. 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, how-
ever, the -3dB bandwidth of the device will decrease and
the peaking increase. The amplifiers drive 10pF loads in
parallel with 10kwith 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 5and 50) 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 150and 10nF are typical. The advantage of a snub-
ber is that it does not draw any DC load current or
reduce the gain
Power Supply Bypassing and Printed Circuit
Board Layout
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 rec-
ommended, 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.
12

12 Page





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