ETC EL5427

EL5127, EL5227, EL5327, EL5427
®
Data Sheet
2.5MHz 4, 8, 10 & 12 Channel Rail-to-Rail
Buffers
The EL5127, EL5227, EL5327, and
EL5427 are low power, high voltage
rail-to-rail input/output buffers
designed for use in reference voltage buffering applications
in small LCD displays. They are available in quad (EL5127),
octal (EL5227), 10-channel (EL5327), and 12-channel
(EL5427) topologies. All buffers feature a -3dB bandwidth of
2.5MHz and operate from just 133µA per buffer. This family
also features a continuous output drive capability of 30mA
(sink and source).
The quad channel EL5127 is available in the 10-pin MSOP
package. The 8-channel EL5227 is available in both the 20pin TSSOP and 24-pin LPP packages, the 10-channel
EL5327 in the 24-pin TSSOP and 24-pin LPP packages, and
the 12-channel EL5427 in the 28-pin TSSOP and 32-pin
LPP packages. All buffers are specified for operation over
the full -40°C to +85°C temperature range.
December 13, 2002
FN7111
Features
• 2.5MHz -3dB bandwidth
• Supply voltage = 4.5V to 16.5V
• Low supply current (per buffer) = 133µA
• High slew rate = 2.2V/µs
• Rail-to-rail input/output swing
• Ultra-small packages
Applications
• TFT-LCD drive circuits
• Electronic games
• Touch-screen displays
• Personal communication devices
• Personal digital assistants (PDAs)
• Portable instrumentation
Ordering Information
PART NUMBER
PACKAGE
TAPE & REEL
PKG. NO.
EL5127CY
10-Pin MSOP
-
MDP0043
EL5127CY-T7
10-Pin MSOP
7”
MDP0043
EL5127CY-T13
10-Pin MSOP
13”
MDP0043
EL5227CL
24-Pin LPP
-
MDP0046
EL5227CL-T7
24-Pin LPP
7”
MDP0046
EL5227CL-T13
24-Pin LPP
13”
MDP0046
EL5227CR
20-Pin TSSOP
-
MDP0044
EL5227CR-T7
20-Pin TSSOP
7”
MDP0044
EL5227CR-T13
20-Pin TSSOP
13”
MDP0044
EL5327CL
24-Pin LPP
-
MDP0046
EL5327CL-T7
24-Pin LPP
7”
MDP0046
EL5327CL-T13
24-Pin LPP
13”
MDP0046
EL5327CR
24-Pin TSSOP
-
MDP0044
EL5327CR-T7
24-Pin TSSOP
7”
MDP0044
EL5327CR-T13
24-Pin TSSOP
13”
MDP0044
EL5427CL
32-Pin LPP
-
MDP0046
EL5427CL-T7
32-Pin LPP
7”
MDP0046
EL5427CL-T13
32-Pin LPP
13”
MDP0046
EL5427CR
28-Pin TSSOP
-
MDP0044
EL5427CR-T7
28-Pin TSSOP
7”
MDP0044
EL5427CR-T13
28-Pin TSSOP
13”
MDP0044
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2003. All Rights Reserved. Elantec is a registered trademark of Elantec Semiconductor, Inc.
All other trademarks mentioned are the property of their respective owners.
EL5127, EL5227, EL5327, EL5427
Pinouts
EL5427
(28-Pin TSSOP)
TOP VIEW
EL5227
(20-PIN TSSOP)
TOP VIEW
EL5127
(10-PIN MSOP)
TOP VIEW
1 VIN1
VOUT1 28
2 VIN2
VOUT2 27
EL5327
(24-Pin TSSOP)
TOP VIEW
1 VIN1
VOUT1 20
3 VIN3
VOUT3 26
1 VIN1
VOUT1
24
VIN1 1
10 VOUT1
2 VIN2
VOUT2 19
4 VIN4
VOUT4 25
2 VIN2
VOUT2 23
VIN2 2
9 VOUT2
3 VIN3
VOUT3 18
5 VIN5
VOUT5 24
3 VIN3
VOUT3 22
VS+ 3
8 VS-
4 VIN4
VOUT4 17
6 VIN6
VOUT6 23
4 VIN4
VOUT4 21
VIN3 4
7 VOUT3
5 VS+
VS- 16
7 VS+
VS- 22
5 VIN5
VOUT5 20
VIN4 5
6 VOUT4
6 VS+
VS- 15
8 VS+
VS- 21
6 VS+
VS- 19
7 VIN5
VOUT5 14
9 VIN7
VOUT7 20
7 VS+
VS- 18
8 VIN6
VOUT6 13
10 VIN8
VOUT8 19
8 VIN6
VOUT6 17
9 VIN7
VOUT7 12
11 VIN9
VOUT9 18
9 VIN7
VOUT7 16
10 VIN8
VOUT8 11
12 VIN1O
VOUT10 17
10 VIN8
VOUT8 15
13 VIN11
VOUT11 16
11 VIN9
VOUT9 14
14 VIN12
VOUT12 15
12 VIN10
VOUT10 13
20 VOUT2
21 VOUT1*
22 NC
23 VIN1*
24 VIN2
26 VOUT2
EL5227 & EL5327
(24-Pin LPP)
TOP VIEW
27 VOUT1
28 NC
29 NC
30 NC
31 VIN1
32 VIN2
EL5427
(32-Pin LPP)
TOP VIEW
VIN3 1
25 VOUT3
VIN4 2
24 VOUT4
VIN3 1
19 VOUT3
VIN5 3
23 VOUT5
VIN4 2
18 VOUT4
VIN6 4
22 VOUT6
VIN5 3
17 VOUT5
VS+ 5
Thermal Pad
21 VS-
VS+ 4
Thermal Pad
16 VS-
VIN10 9
17 VOUT10
2
VOUT9 12
13 VOUT8
VOUT10* 11
VIN8 7
NC 10
18 VOUT9
CVIN10* 9
VIN9 8
VIN9 8
14 VOUT7
VOUT11 16
VIN7 6
VOUT12 15
19 VOUT8
NC 14
VIN8 7
NC 13
15 VOUT6
NC 12
VIN6 5
VIN12 11
20 VOUT7
VIN11 10
VIN7 6
* Not available in EL5227
EL5127, EL5227, EL5327, EL5427
Absolute Maximum Ratings (TA = 25°C)
Supply Voltage Between VS+ and VS- . . . . . . . . . . . . . . . . . . .+18V
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . .VS- -0.5V, VS +0.5V
Maximum Continuous Output Current . . . . . . . . . . . . . . . . . . . 30mA
ESD Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2kV
Maximum Die Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . +125°C
Storage Temperature. . . . . . . . . . . . . . . . . . . . . . . . -65°C to +150°C
Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Curves
Operating Temperature . . . . . . . . . . . . . . . . . . . . . . . -40°C to +85°C
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
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 Specifications
PARAMETER
VS+ = +5V, VS- = -5V, RL = 10kΩ, CL = 10pF to 0V, TA = 25°C, unless otherwise specified.
DESCRIPTION
CONDITIONS
MIN
TYP
MAX
UNIT
15
mV
INPUT CHARACTERISTICS
VOS
Input Offset Voltage
VCM = 0V
1
TCVOS
Average Offset Voltage Drift
(Note 1)
5
IB
Input Bias Current
VCM = 0V
2
RIN
Input Impedance
CIN
Input Capacitance
AV
Voltage Gain
-4.5V ≤ VOUT ≤ 4.5V
µV/°C
50
nA
1
GΩ
1.35
pF
0.99
1.01
V/V
-4.85
V
OUTPUT CHARACTERISTICS
VOL
Output Swing Low
IL = -5mA
-4.95
VOH
Output Swing High
IL = +5mA
4.85
4.95
IOUT (max)
Max Output Current (Note 2)
RL = 10Ω
100
±120
55
80
V
30
mA
POWER SUPPLY PERFORMANCE
PSRR
Power Supply Rejection Ratio
VS is moved from ±2.25V to ±7.75V
dB
IS
Supply Current
No load (EL5127)
0.7
0.9
mA
No load (EL5227)
1.2
1.4
mA
No load (EL5327)
1.4
2
mA
No load (EL5427)
1.6
2.2
mA
DYNAMIC PERFORMANCE
SR
Slew Rate (Note 3)
-4.0V ≤ VOUT ≤ 4.0V, 20% to 80%
tS
Settling to +0.1% (AV = +1)
BW
CS
2.2
V/µs
(AV = +1), VO = 2V step
900
ns
-3dB Bandwidth
RL = 10kΩ, CL = 10pF
2.5
MHz
Channel Separation
f = 100kHz
75
dB
NOTES:
1. Measured over operating temperature range.
2. Instantaneous peak current.
3. Slew rate is measured on rising and falling edges.
3
0.9
EL5127, EL5227, EL5327, EL5427
Electrical Specifications
PARAMETER
VS+ = +5V, VS- = 0V, RL = 10kΩ, CL = 10pF to 2.5V, TA = 25°C, unless otherwise specified.
DESCRIPTION
CONDITION
MIN
TYP
MAX
UNIT
15
mV
INPUT CHARACTERISTICS
VOS
Input Offset Voltage
VCM = 2.5V
1
TCVOS
Average Offset Voltage Drift
(Note 1)
5
IB
Input Bias Current
VCM = 2.5V
2
RIN
Input Impedance
CIN
Input Capacitance
AV
Voltage Gain
0.5V ≤ VOUT ≤ 4.5V
µV/°C
50
nA
1
GΩ
1.35
pF
0.99
1.01
V/V
150
mV
OUTPUT CHARACTERISTICS
VOL
Output Swing Low
IL = -5mA
80
VOH
Output Swing High
IL = +5mA
4.85
4.95
V
IOUT (max)
Output Current (Note 2)
RL = 10Ω
100
±120
mA
55
80
dB
POWER SUPPLY PERFORMANCE
PSRR
Power Supply Rejection Ratio
VS is moved from 4.5V to 15.5V
IS
Supply Current
No load (EL5127)
0.7
0.9
mA
No load (EL5227)
1.1
1.35
mA
No load (EL5327)
1.35
1.9
mA
No load (EL5427)
1.5
2.05
mA
DYNAMIC PERFORMANCE
SR
Slew Rate (Note 3)
1V ≤ VOUT ≤ 4V, 20% to 80%
tS
Settling to +0.1% (AV = +1)
(AV = +1), VO = 2V step
BW
-3dB Bandwidth
CS
Channel Separation
0.9
1.5
V/µs
1000
ns
RL = 10kΩ, CL = 10pF
2.5
MHz
f = 5MHz
75
dB
NOTES:
1. Measured over operating temperature range.
2. Instantaneous peak current.
3. Slew rate is measured on rising and falling edges.
Electrical Specifications
PARAMETER
VS+ = +15V, VS- = 0V, RL = 10kΩ, CL = 10pF to 7.5V, TA = 25°C, unless otherwise specified.
DESCRIPTION
CONDITION
MIN
TYP
MAX
UNIT
18
mV
INPUT CHARACTERISTICS
VOS
Input Offset Voltage
VCM = 7.5V
1
TCVOS
Average Offset Voltage Drift
(Note 1)
5
IB
Input Bias Current
VCM = 7.5V
2
RIN
Input Impedance
CIN
Input Capacitance
AV
Voltage Gain
0.5V ≤ VOUT ≤ 14.5V
µV/°C
50
nA
1
GΩ
1.35
pF
0.99
1.01
V/V
150
mV
OUTPUT CHARACTERISTICS
VOL
Output Swing Low
IL = -5mA
VOH
Output Swing High
IL = +5mA
14.85
14.95
V
IOUT (max)
Output Current (Note 2)
RL = 10Ω
100
±120
mA
4
50
EL5127, EL5227, EL5327, EL5427
Electrical Specifications
PARAMETER
VS+ = +15V, VS- = 0V, RL = 10kΩ, CL = 10pF to 7.5V, TA = 25°C, unless otherwise specified.
DESCRIPTION
CONDITION
MIN
TYP
55
80
MAX
UNIT
POWER SUPPLY PERFORMANCE
PSRR
Power Supply Rejection Ratio
VS is moved from 4.5V to 15.5V
dB
IS
Supply Current
No load (EL5127)
0.75
0.95
mA
No load (EL5227)
1.3
1.55
mA
No load (EL5327)
1.5
2.1
mA
No load (EL5427)
1.6
2.4
mA
DYNAMIC PERFORMANCE
SR
Slew Rate (Note 3)
1V ≤ VOUT ≤ 14V, 20% to 80%
tS
Settling to +0.1% (AV = +1)
BW
CS
2.2
V/µs
(AV = +1), VO = 2V step
900
ns
-3dB Bandwidth
RL = 10kΩ, CL = 10pF
2.5
MHz
Channel Separation
f = 5MHz
75
dB
NOTES:
1. Measured over operating temperature range.
2. Instantaneous peak current.
3. Slew rate is measured on rising and falling edges.
5
0.9
EL5127, EL5227, EL5327, EL5427
Typical Performance Curves
Frequency Response for Various CL
Frequency Response for Various RL
20
CL = 10pF
VS = ±5V
Normalized Magnitude (dB)
Normalized Magnitude (dB)
20
10
10kΩ
1kΩ
0
562Ω
-10
150Ω
-20
-30
1k
10k
100k
1M
RL = 10kΩ
VS = ±5V
10
47pF
12pF
0
1nF
-10
100pF
-20
-30
1k
10M
10k
100k
Frequency (Hz)
Output Impedance vs Frequency
10M
Maximum Output Swing vs Frequency
2000
12
Maximum Output Swing (VP-P)
TA = 25°C
VS = ±5V
Output Impedance (Ω)
1M
Frequency (Hz)
1600
1200
800
400
0
1k
10k
100k
VS = ±5V
RL = 10kΩ
CL = 12pF
TA = 25°C
10
8
6
4
2
0
10k
1M
100k
Frequency (Hz)
1M
10M
Frequency (Hz)
Total Harmonic Distortion + Noise vs Frequency
Input Voltage Noise Spectral Density vs Frequency
0.12
300
THD + Noise (%)
10
0.08
0.06
0.04
0.02
10k
1M
100k
10M
0
1k
100M
10k
Frequency (Hz)
Small Signal Overshoot vs Load Capacitance
Input Offset Voltage Distribution
100
16
14
70
% of Buffers
60
50
40
12
10
8
6
30
4
20
2
Capacitance (pF)
6
Input Offset Voltage (mV)
10
8
6
4
2
1k
-4
0
100
-6
0
10
-8
Overshoot (%)
80
18
V
VSS=±5V
= ±5V
R
RLL=10kΩ
= 10kΩ
V
VIN
= ±50mV
IN=±50m
V
TA = 25°C
-10
90
100k
Frequency (Hz)
0
1k
-2
Voltage Noise (nV/√Hz)
0.1
100
EL5127, EL5227, EL5327, EL5427
Typical Performance Curves
(Continued)
Input Bias Current vs Temperature
Output High Voltage vs Temperature
3.5
4.955
3
2.5
2
1.5
VS = ±5V
IOUT = 5mA
4.95
Output High Voltage (V)
Input Bias Current (nA)
VS = ±5V
4.945
4.94
4.935
4.93
1
4.925
-35
-15
5
25
45
85
65
-35
-15
Temperature (°C)
Output Low Voltage vs Temperature
25
45
65
85
45
65
85
Voltage Gain vs Temperature
-4.938
1.0045
VS = ±5V
IOUT = -5mA
VS = ±5V
1.004
-4.942
Voltage Gain (V/V)
Output Low Voltage (V)
5
Temperature (°C)
-4.946
-4.95
1.0035
1.003
1.0025
1.002
-4.954
1.0015
-4.958
1.001
-35
-15
5
25
45
85
65
-35
-15
Temperature (°C)
5
25
Temperature (°C)
Slew Rate vs Temperature
Supply Current per Channel vs Temperature
2.255
0.185
VS = ±5V
Supply Current (mA)
Slew Rate (V/µs)
2.245
2.235
2.225
0.18
0.175
0.17
0.165
2.215
-40
VS=±5V
-20
0.16
0
20
40
60
-35
80
Temperature (°C)
-15
5
25
Temperature (°C)
Large Signal Transient Response
Supply Current per Channel vs Supply Voltage
0.195
TA = 25°C
Supply Current (mA)
0.19
0.185
1V/div
0.18
0.175
0.17
0.165
4
6
8
10
12
Supply Voltage (V)
7
14
16
18
4µs/div
45
65
85
EL5127, EL5227, EL5327, EL5427
Typical Performance Curves
(Continued)
Small Signal Transient Response
3
Package Power Dissipation vs Ambient Temperature
JEDEC JESD51-7 High Effective Thermal Conductivity (4layer) Test Board, LPP exposed diepad soldered to PCB
per JESD51-5
2.857W
P3
2=
2
/W
C
7°
=3
1.5
°C
4
P2
35
LP
20mV/di
LP
/W
Power Dissipation (W)
2.5 2.703W
1
0.5
0
1µs/div
0
25
50
75 85 100
125
150
Ambient Temperature (°C)
Package Power Dissipation vs Ambient Temperature
JEDEC JESD51-7 High Effective Thermal Conductivity
Test Board
1.4
1.2
1.176W
1.111W
1
TSSOP24
θJA=85°C/W
0.8
TSSOP28
θJA=75°C/W
0.6
TSSOP20
θJA=90°C/W
0.4
486mW
0.5
Power Dissipation (W)
Power Dissipation (W)
0.6
1.333W
Package Power Dissipation vs Ambient Temperature
JEDEC JESD51-3 Low Effective Thermal Conductivity
Test Board
0.4
M
SO
P1
20
0
6°
C/
W
0.3
0.2
0.1
0.2
0
0
0
25
50
75 85
100
0
125
25
Ambient Temperature (°C)
TSSOP28
θJA=120°C/W
0.5
TSSOP24
θJA=128°C/W
0.4
0.3
0.2
TSSOP20
θJA=140°C/W
0.1
0.8
M
SO
P1
11
5°
0
C/
W
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0
0
25
50
75 85
100
0
125
25
Package Power Dissipation vs Ambient Temperature
JEDEC JESD51-3 and SEMI G42-88 (Single Layer) Test
Board
0.8
758mW
0.7
714mW
0.6
LPP32
132°C/W
0.5
0.4
LPP24
140°C/W
0.3
0.2
0.1
0
0
25
50
75 85 100
Ambient Temperature (°C)
8
50
75 85
Ambient Temperature (°C)
Ambient Temperature (°C)
Power Dissipation (W)
Power Dissipation (W)
714mW
0.6
125
870mW
0.9
781mW
0.7
100
1
833mW
0.8
75 85
Package Power Dissipation vs Ambient Temperature
JEDEC JESD51-7 High Effective Thermal Conductivity Test
Board
Package Power Dissipation vs Ambient Temperature
JEDEC JESD51-3 Low Effective Thermal Conductivity Test
Board
Power Dissipation (W)
0.9
50
Ambient Temperature (°C)
125
150
100
125
EL5127, EL5227, EL5327, EL5427
Applications Information
Short Circuit Current Limit
Product Description
The EL5127, EL5227, EL5327, and EL5427 unity gain
buffers are fabricated using a high voltage CMOS process. It
exhibits rail-to-rail input and output capability and has low
power consumption (120µA per buffer). These features
make the EL5127, EL5227, EL5327, and EL5427 ideal for a
wide range of general-purpose applications. When driving a
load of 10kΩ and 12pF, the EL5127, EL5227, EL5327, and
EL5427 have a -3dB bandwidth of 2.5MHz and exhibits
2.2V/µs slew rate.
Operating Voltage, Input, and Output
The EL5127, EL5227, EL5327, and EL5427 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
EL5127, EL5227, EL5327, and EL5427 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 output swings of the EL5127, EL5227, EL5327, and
EL5427 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. 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.
10µs
VS=±5V
TA=25°C
VIN=10VP-P
Output
5V
Output Phase Reversal
The EL5127, EL5227, EL5327, and EL5427 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.
1V
10µs
VS=±2.5V
TA=25°C
VIN=6VP-P
1V
FIGURE 2. OPERATION WITH BEYOND-THE-RAILS INPUT
Power Dissipation
Input
5V
The EL5127, EL5227, EL5327, and EL5427 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 ±30mA. This limit is set by the design of the internal
metal interconnects.
FIGURE 1. OPERATION WITH RAIL-TO-RAIL INPUT AND
OUTPUT
With the high-output drive capability of the EL5127, EL5227,
EL5327, and EL5427 buffer, 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 buffer to remain in the safe operating area.
The maximum power dissipation allowed in a package is
determined according to:
T JMAX - TAMAX
P DMAX = --------------------------------------------Θ JA
9
EL5127, EL5227, EL5327, EL5427
Driving Capacitive Loads
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 loads, or:
P DMAX = Σi [ V S × I SMAX + ( V S + - V OUT i ) × I LOAD i ]
when sourcing, and:
P DMAX = Σi [ V S × I SMAX + ( V OUT i - V S - ) × I LOAD i ]
when sinking.
where:
i = 1 to Total number of buffers
VS = Total supply voltage
ISMAX = Maximum quiescent current per channel
VOUTi = Maximum output voltage of the application
ILOADi = Load current
If we set the two PDMAX equations equal to each other, we
can solve for RLOADi to avoid device overheat. The package
power dissipation curves 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.
The EL5127, EL5227, EL5327, and EL5427 can drive a wide
range of capacitive loads. As load capacitance increases,
however, the -3dB bandwidth of the device will decrease and
the peaking increase. The buffers 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.
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, 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+ pin to VS- pin. A 4.7µF tantalum capacitor
should then be connected from VS+ pin to ground. 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.
Unused Buffers
It is recommended that any unused buffer have the input tied
to the ground plane.
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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
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