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. Typical values are for information purposes only. Unless otherwise noted, all tests
are at the specified temperature and are pulsed tests, therefore: T
J
= T
C
= T
A
DC Electrical Specifications
PARAMETER
V
SUPPLY
I
S
V
OS
I
IN
Z
IN
V
DIFF
A
VOL
V
OUT
(200)
V
OUT
(100)
V
N
V
REFOS
PSRR
I
OUT
(min)
R
OUT
V
CC
= +5V, V
EE
= -5V, T
A
= 25°C, V
IN
= 0V, R
L
= 200, unless otherwise specified.
DESCRIPTION
MIN
±3.0
TYP
±5.0
11
-25
-20
10
6
400
±2.0
±2.3
75
±3.4
±2.9
±3.6
±3.1
36
-60
60
50
-25
70
60
0.1
+60
MAX
±6.3
14
40
20
UNITS
V
mA
mV
A
k
V
dB
V
V
nV/Hz
mV
dB
mA
Supply Operating Range (V
CC
–V
EE
)
Power Supply Current (No Load)
Input Referred Offset Voltage
Input Bias Current (V
IN
, V
INB
, V
REF
)
Differential Input Impedance
Differential Input Range
Open Loop Voltage Gain
Output Voltage Swing (200 load, V
OUT
to V
OUTB
)
Output Voltage Swing (100 Load, V
OUT
to V
OUTB
)
Input Referred Voltage Noise
Output Offset Relative to V
REF
Power Supply Rejection Ratio
Minimum Output Current
(V
OUT
= V
OUTB
= 0V) Output Impedance
AC Electrical Specifications
PARAMETER
BW(-3dB)
SR
Tstl
GBW
V
REFBW
(-3dB)
V
REFSR
THDf1
dP
dG
NOTE:
V
CC
= +5V, V
EE
= -5V, T
A
= 25°C, V
IN
= 0V, R
LOAD
= 200, unless otherwise specified
DESCRIPTION
MIN
TYP
150
800
15
400
130
100
-75
0.16
0.24
MAX
UNITS
MHz
V/s
ns
MHz
MHz
V/s
dB
°
%
-3dB Bandwidth (@ gain of 2)
Differential Slewrate
Settling Time to 1%
Gain Bandwidth Product
V
REF
-3dB Bandwidth
V
REF
Slewrate
Distortion at 100kHz (Note 1)
Differential Phase @ 3.58MHz
Differential Gain @ 3.58MHz
1. Distortion measurement quoted for V
OUT
–V
OUTB
= 12V pk-pk, R
LOAD
= 200, V
GAIN
= 8
FN7048 Rev 1.00
February 11, 2005
Page 2 of 6
EL2141
Pin Descriptions
EL2141
2
1
4
3
5
6
7
8
PIN NAME
V
IN
FBP
FBN
V
REF
V
OUTB
V
CC
V
EE
V
OUT
Non-inverting Input
Non-inverting Feedback Input. Resistor R1 must be Connected from this Pin to V
OUT
.
Inverting Feedback Input. Resistor R3 must be Connected from this pin to V
OUTB
.
Output Common-mode Control. The Common-mode Voltage of V
OUT
and V
OUTB
will Follow the Voltage on this Pin.
Note that on the EL2141, this pin is also the V
INB
pin.
Inverting Output
Positive Supply
Negative Supply
Non-inverting Output
FUNCTION
Typical Performance Curves
FIGURE 1. I
S
vs SUPPLY VOLTAGE
FIGURE 2. FREQUENCY RESPONSE vs RESISTOR R2
(GAIN = 2)
FIGURE 3. FREQUENCY RESPONSE vs TEMPERATURE
FIGURE 4. FREQUENCY RESPONSE vs RESISTOR R2
(GAIN = 8)
FN7048 Rev 1.00
February 11, 2005
Page 3 of 6
EL2141
Typical Performance Curves
(Continued)
FIGURE 5. DISTORTION vs FREQUENCY
(GAIN = 6, R
LOAD
= 200) V
IN
= 2V
PK-PK
FIGURE 6. OUTPUT SIGNAL AND COMMON MODE SIGNAL
vs FREQUENCY
Applications Information
The amount of capacitance tolerated on any of these nodes
in an actual application will also be dependent on the gain
setting and the resistor values in the feedback network.
Distortion Considerations
The harmonics that these amplifiers will potentially produce
are the 2nd, 3rd, 5th, and 6th. Their amplitude is application
dependent. All other harmonics should be negligible by com-
parison. Each should be considered separately:
H2
The second harmonic arises from the input stage, and
the lower the applied differential signal amplitude, the lower
the magnitude of the second harmonic. For practical consid-
erations of required output signal and input noise levels, the
user will end up choosing a circuit gain. Referring to Figure 1,
it is best if the voltage at the negative feedback node tracks
the V
REF
node, and the voltage at the positive feedback
node tracks the V
IN
node respectively. This would theoreti-
cally require that R1 + R2 = R3, although the lowest
distortion is found at about R3 = R1 + (0.7*R2). With this
arrangement, the second harmonic should be suppressed
well below the value of the third harmonic.
H3
The third harmonic should be the dominant harmonic and
is primarily affected by output load current which, of course,
is unavoidable. However, this should encourage the user not
to waste current in the gain setting resistors, and to use val-
ues that consume only a small proportion of the load current,
so long as peaking does not occur. The more load current,
the worse the distortion, but depending on the frequency, it
may be possible to reduce the amplifier gain so that there is
more internal gain left to cancel out any distortion.
H5
The fifth harmonic should always be below the third, and
will not become significant until heavy load currents are
drawn. Generally, it should respond to the same efforts
applied to reducing the third harmonic.
H6
The sixth harmonic should not be a problem and is the
result of poor power supply decoupling. While 100nF chip
capacitors may be sufficient for some applications, it would
be insufficient for driving full signal swings into a twisted pair
line at 100kHz. Under these conditions, the addition of 4.7F
tantalum capacitors would cure the problem.
R1
+
R2
+
R3
GAIN
= ------------------------------------
-
R2
Choice of Feedback Resistor
There is little to be gained from choosing resistor R2 values
below 400
and, in fact, it would only result in increased
power dissipation and signal distortion. Above 400, the
bandwidth response will develop some peaking (for a gain of
two), but substantially higher resistor R2 values may be used
for higher voltage gains, such as up to 2k at a gain of eight
before peaking will develop. R1 and R3 are selected as
needed to set the voltage gain, and while R1 = R3 is sug-
gested, the gain equation above holds for any values (see
distortion for further suggestions).
Capacitance Considerations
As with many high bandwidth amplifiers, the EL2141 prefers
not to drive highly capacitive loads. It is best if the capaci-
tance on V
OUT
and V
OUTB
is kept below 10pF if the user
does not want gain peaking to develop.
In addition, on the EL2141, the two feedback nodes FBP and
FBN should be laid out so as to minimize stray capacitance,
else an additional pole will potentially develop in the
response with possible gain peaking.
FN7048 Rev 1.00
February 11, 2005
Page 4 of 6
EL2141
Typical Applications Circuits
FIGURE 7. TYPICAL TWISTED PAIR APPLICATION
FIGURE 8. DIFFERENTIAL LINE DRIVER WITH EQUALIZATION
[i=s]This post was last edited by qwqwqw2088 on 2021-5-26 08:57[/i]Transient response is when the load absorption current jumps, which causes the voltage at the power supply output to deviate from the...
The first time I made a board for audio acquisition, JTAG connection failed! ! TCK output 500KHz. Several possible errors have been ruled out: 1. Reset. Reset for 200ms and then pull up through CPLD. ...
There are two flash devices in the WINCE display device: Nandflash, Nandflash2, and the two FLASH folders point to the same flash. I checked the registry and found a FLASH item. What setting is wrong ...
The code is as follows. I want to save the data obtained by serial port 2 (11 data in a packet) into the Re_buf array. . . . I have been struggling for a long time. . . . Please help me: Sad:: Sad:: S...
This article introduces 10 rules for PCB component layout.
1. Follow the layout principle of "big first, small later, difficult first, easy later", that is, important unit circuits and core components...
This paper designs a dot matrix LED text display screen that is easy to update, expandable, and low-cost. The way to reduce costs is
① Use the Bluetooth data transmission function of mobile ph...[Details]
When choosing a laptop battery, you should consider several factors, such as power, appearance, and quality.
Regarding power, we often see that a manufacturer uses values such as the number ...[Details]
With the rapid development of urban economy, elevators are increasingly used as a vertical transportation tool. However, elevator fault detection and maintenance, especially the role of elevator remot...[Details]
In the previous series, we have listed some basic knowledge of C language in Tables 1 to 3. We hope that beginners can strengthen their memory of the above tables and gradually learn to use them wh...[Details]
I. Introduction
Since RS232 has a short communication distance (only 15 meters according to EAT/TAI-232 standard), and can only perform point-to-point communication, it cannot directly f...[Details]
PV inverter manufacturer SMA has launched its first DC arc fault circuit interrupter (AFCI) PV inverter and has received UL certification.
The new SunnyBoy AFCI inverter models include 3000-US...[Details]
LED is the abbreviation of light emitting diode, which is an electric light source made of semiconductor technology. The core part of LED is a chip composed of P-type semiconductor and N-type semi...[Details]
Digital array radar (DAR) uses digital beam forming (DBF) in both receiving and transmitting modes to achieve flexible distribution and reception of RF signal power in the airspace, obtain excellent t...[Details]
In recent years, with the rapid development of the information industry, dot matrix LED display screens have been widely used in various advertising and information display systems such as the fina...[Details]
TC9012F is a universal CMOS large-scale integrated circuit for infrared remote control signal transmission, suitable for remote control of TV, VTR, laser player and other equipment. In the market, ...[Details]
Today, the value of electronic components in cars accounts for 15-20% of the total vehicle. In the future, this proportion may be as high as 30-40% as more safety electronics, fuel consumption and ...[Details]
It is well known to automotive suppliers that automakers are demanding more from their supply base. For connector suppliers, this means stricter requirements for product performance, stability and ...[Details]
Spatial Division Multiplexing (SDM) MIMO processing can significantly improve spectrum efficiency and thus greatly increase the capacity of wireless communication systems. Spatial Division Multip...[Details]
The era of mobile access to the Internet has arrived, and it will rapidly change the business and infrastructure needs of mobile operators under a whole new trend of requirements. We need 4G LTE to...[Details]
LED light sources have many environmental advantages, but early products still have certain technical bottlenecks in heat dissipation and high brightness design that cannot be broken through....[Details]
DIY/Open Source Hardware
京公网安备 11010802033920号
EEWORLD
