Recommended 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. 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
C
IN
V
DIFF
A
VOL
V
IN
V
OUT
I
OUT
(min)
V
N
V
REF
PSRR
CMRR2
CMRR1
V
CC
= +5V, V
EE
= -5V, T
EE
= 25°C, V
IN
= 0V, R
L
= 100, unless otherwise specified
DESCRIPTION
MIN
±3.0
TYP
±5.0
11
-25
-20
10
6
400
1
±2.0
±2.3
75
-2.6
±2.9
50
±3.1
60
36
-2.5
60
60
50
70
70
60
+3.3
+4.0
MAX
±6.3
14
40
20
UNITS
V
mA
mV
µA
kΩ
pF
V
dB
V
V
mA
nV/√Hz
V
dB
dB
dB
Supply Operating Range (V
CC
-V
EE
)
Power Supply Current (no load)
Input Referred Offset Voltage
Input Bias Current (V
IN
, V
IN
B, V
REF
)
Differential Input Resistance
Differential Input Capacitance
Differential Input Range
Open Loop Voltage Gain
Input Common Mode Voltage Range
Output Voltage Swing (50Ω load to GND)
Minimum Output Current
Input Referred Voltage Noise
Output Voltage Control Range
Power Supply Rejection Ratio
Input Common Mode Rejection Ratio (V
IN
= ±2V)
Input Common Mode Rejection Ratio (full V
IN
range)
AC Electrical Specifications
PARAMETER
BW(-3dB)
SR
T
STL
GBWP
V
REF
BW(-3dB)
V
REF
SR
dG
dθ
V
CC
= +5V, V
EE
= -5V, T
A
= 25C, V
IN
= 0V, R
LOAD
= 100, unless otherwise specified
DESCRIPTION
MIN
TYP
150
400
15
200
130
100
0.2
0.2
MAX
UNITS
MHz
V/µs
ns
MHz
MHz
V/µsec
%
°
-3dB Bandwidth (Gain =1)
Slewrate
Settling time to 1%
Gain bandwidth product
V
REF
-3dB Bandwidth
V
REF
Slewrate
Differential gain at 3.58MHz
Differential phase at 3.58MHz
2
FN7049.1
February 11, 2005
EL2142
Pin Descriptions
PIN NUMBER
1
2
3
4
5
6
7
8
PIN NAME
V
FB
V
IN
V
INB
V
REF
NC
V
CC
V
EE
V
OUT
Positive supply voltage
Negative supply voltage
Output voltage
Feedback input
Non-inverting input
Inverting input
Sets output voltage level to V
REF
when V
IN
=V
INB
FUNCTION
Typical Performance Curves
I
S
vs Supply Voltage
Frequency Response
(Gain = 1)
Frequency Response
vs Resistor R1 (Gain = 4)
CMRR vs Frequency
V
REF
Frequency Response
Distortion vs Frequency
(Gain = 3, R
LOAD
= 100
Ω
)
V
IN
= 2V
PK-PK
3
FN7049.1
February 11, 2005
EL2142
Applications Information
one, there is little to be gained from choosing resistor R1
value below 200Ω, for it would only result in increased power
dissipation and potential signal distortion. Above 200Ω, the
bandwidth response will develop some peaking (for a gain of
one), but substantially higher R1 values may be used for
higher voltage gains, such as up to 1kΩ at a gain of four
before peaking will develop.
Capacitance Considerations
As with many high bandwidth amplifiers, the EL2142 prefers
not to drive highly capacitive loads. It is best if the
capacitance on V
OUT
is kept below 10pF if the user does not
want gain peaking to develop. The V
FB
node forms a
potential pole in the feedback loop, so capacitance should
be minimized on this node for maximum bandwidth.
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.
Gain Equation
V
OUT
= ((R2+R1)/R1) x (V
IN
-V
INB
+V
REF
) when R1 tied to
GND
V
OUT
= ((R2+R1)/R1) x (V
IN
-V
INB
) when R1 tied to V
REF
Choice of Feedback Resistor
For a gain of one, V
OUT
may be shorted back to V
FB
, but
100Ω-200Ω improves the bandwidth. For gains greater than
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