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.
E
L
2
2
4
5
C
,
E
L
2
4
4
5
C
General Description
The EL2245C/EL2445C are dual and quad versions of the popular
EL2045C. They are high speed, low power, low cost monolithic oper-
ational amplifiers built on Elantec's proprietary complementary
bipolar process. The EL2245C/EL2445C are gain-of-2 stable and fea-
ture a 275V/s slew rate and 100MHz bandwidth at gain-of-2 while
requiring only 5.2mA of supply current per amplifier.
The power supply operating range of the EL2245C/EL2445C is from
18V down to as little as 2V. For single-supply operation, the
EL2245C/EL2445C operate from 36V down to as little as 2.5V. The
excellent power supply operating range of the EL2245C/EL2445C
makes them an obvious choice for applications on a single +5V or
+3V supply.
The EL2245C/EL2445C also feature an extremely wide output volt-
age swing of 13.6V with V
S
= 15V and R
L
= 1000
. At 5V,
output voltage swing is a wide 3.8V with R
L
= 500
and 3.2V with
R
L
= 150
. Furthermore, for single-supply operation at +5V, output
voltage swing is an excellent 0.3V to 3.8V with R
L
= 500
.
At a gain of +2, the EL2245C/EL2445C have a -3dB bandwidth of
100MHz with a phase margin of 50. They can drive unlimited load
capacitance, and because of their conventional voltage-feedback
topology, the EL2245C/EL2445C allow the use of reactive or non-lin-
ear elements in their feedback network. This versatility combined with
l o w c o s t a n d 7 5 m A o f o u t p u t - c u r r e n t d r i v e m a k e t h e
EL2245C/EL2445C an ideal choice for price-sensitive applications
requiring low power and high speed.
Connection Diagrams
EL2245CN/CS Dual
EL2445CN/CS Quad
Features
100MHz gain-bandwidth at gain-
of-2
Gain-of-2 stable
Low supply current (per amplifier)
= 5.2mA at V
S
= 15V
Wide supply range
= 2V to 18V dual-supply
= 2.5V to 36V single-supply
High slew rate = 275V/s
Fast settling = 80ns to 0.1% for a
10V step
Low differential gain = 0.02% at
A
V
= +2, R
L
= 150
Low differential phase = 0.07 at
A
V
= +2, R
L
= 150
Stable with unlimited capacitive
load
Wide output voltage swing
=13.6V with V
S
= 15V,
R
L
= 1000
= 3.8V/0.3V with V
S
= +5V,
R
L
= 500
Applications
Video amplifier
Single-supply amplifier
Active filters/integrators
High-speed sample-and-hold
High-speed signal processing
ADC/DAC buffer
Pulse/RF amplifier
Pin diode receiver
Log amplifier
Photo multiplier amplifier
Difference amplifier
Ordering Information
Part No.
Temp. Range
Package
Outline #
EL2245CN
-40C to +85C
8-Pin P-DIP
MDP0031
EL2245CS
-40C to +85C
8-Lead SO
MDP0027
EL2445CN
-40C to +85C
14-Pin P-DIP
MDP0031
EL2445CS
-40C to +85C
14-Lead SO
MDP0027
EL2245C, EL2445C
Dual/Quad Low-Power 100MHz Gain-of-2 Stable Op Amp
S
e
p
t
e
m
b
e
r
2
6
,
2
0
0
1
2
EL2245C, EL2445C
Dual/Quad Low-Power 100MHz Gain-of-2 Stable Op Amp
E
L
2
2
4
5
C
,
E
L
2
4
4
5
C
Absolute Maximum Ratings
(T
A
= 25C)
Supply Voltage (V
S
)
18V or 36V
Peak Output Current (I
OP
)
Short-Circuit Protected
Output Short-Circuit Duration
Infinite
A heat-sink is required to keep junction temperature below
absolute maximum when an output is shorted.
Input Voltage (V
IN)
V
S
Differential Input Voltage (dV
IN
)
10V
Power Dissipation (P
D
)
See Curves
Operating Temperature Range (T
A
)
0C to +75C
Operating Junction Temperature (T
J
)
150C
Storage Temperature (T
ST
)
-65C to +150C
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: T
J
= T
C
= T
A
.
DC Electrical Characteristics
V
S
= 15V, R
L
= 1000
, unless otherwise specified
Parameter
Description
Condition
Temp
Min
Typ
Max
Unit
V
OS
Input Offset
Voltage
V
S
= 15V
25C
0.5
4.0
mV
T
MIN
, T
MAX
6.0
mV
TCV
OS
Average Offset Voltage Drift
[1]
All
10.0
V/C
I
B
Input Bias
V
S
= 15V
25C
2.8
8.2
A
Current
T
MIN
, T
MAX
9.2
A
V
S
= 5V
25C
2.8
A
I
OS
Input Offset
Current
V
S
= 15V
25C
50
300
nA
T
MIN
, T
MAX
400
nA
V
S
= 5V
25C
50
nA
TCI
OS
Average Offset Current Drift
[1]
All
0.3
nA/C
A
VOL
Open-Loop Gain
V
S
= 15V,V
OUT
= 10V, R
L
= 1000
25C
1500
3000
V/V
T
MIN
, T
MAX
1500
V/V
V
S
= 5V, V
OUT
= 2.5V, R
L
= 500
25C
2500
V/V
V
S
= 5V, V
OUT
= 2.5V, R
L
= 150
25C
1750
V/V
PSRR
Power Supply
Rejection Ratio
V
S
= 5V to 15V
25C
65
80
dB
T
MIN
, T
MAX
60
dB
CMRR
Common-Mode
V
CM
= 12V, V
OUT
= 0V
25C
70
90
dB
Rejection Ratio
T
MIN
, T
MAX
70
dB
CMIR
Common-Mode
Input Range
V
S
= 15V
25C
14.0
V
V
S
= 5V
25C
4.2
V
V
S
= +5V
25C
4.2/0.1
V
V
OUT
Output Voltage
Swing
V
S
= 15V, R
L
= 1000
25C
13.4
13.6
V
T
MIN
, T
MAX
13.1
V
V
S
= 15V, R
L
= 500
25C
12.0
13.4
V
V
S
= 5V, R
L
= 500
25C
3.4
3.8
V
V
S
= 5V, R
L
= 150
25C
3.2
V
V
S
= +5V, R
L
= 500
25C
3.6/0.4
3.8/0.3
V
T
MIN
, T
MAX
3.5/0.5
V
I
SC
Output Short
Circuit Current
25C
40
75
mA
T
MIN
, T
MAX
35
mA
I
S
Supply Current
(Per Amplifier)
V
S
= 15V, No Load
25C
5.2
7
mA
T
MIN
7.6
mA
T
MAX
7.6
mA
V
S
= 5V, No Load
25C
5.0
mA
3
EL2245C, EL2445C
Dual/Quad Low-Power 100MHz Gain-of-2 Stable Op Amp
E
L
2
2
4
5
C
,
E
L
2
4
4
5
C
R
IN
Input Resistance
Differential
25C
150
k
Common-Mode
25C
15
M
C
IN
Input Capacitance
A
V
= +1@ 10MHz
25C
1.0
pF
R
OUT
Output Resistance
A
V
= +1
25C
50
m
PSOR
Power-Supply
Operating Range
Dual-Supply
25C
2.0
18.0
V
Single-Supply
25C
2.5
36.0
V
1. Measured from T
MIN
to T
MAX
.
DC Electrical Characteristics (Continued)
V
S
= 15V, R
L
= 1000
, unless otherwise specified
Parameter
Description
Condition
Temp
Min
Typ
Max
Unit
Closed-Loop AC Electrical Characteristics
V
S
= 15V, A
V
= +2, R
L
= 1000
unless otherwise specified
Parameter
Description
Condition
Temp
Min
Typ
Max
Unit
BW
-3dB Bandwidth
(V
OUT
= 0.4V
PP
)
V
S
= 15V, A
V
= +2
25C
100
MHz
V
S
= 15V, A
V
= -1
25C
75
MHz
V
S
= 15V, A
V
= +5
25C
20
MHz
V
S
= 15V, A
V
= +10
25C
10
MHz
V
S
= 15V, A
V
= +20
25C
5
MHz
V
S
= 5V, A
V
= +2
25C
75
MHz
GBWP
Gain-Bandwidth Product
V
S
= 15V
25C
200
MHz
V
S
= 5V
25C
150
MHz
PM
Phase Margin
R
L
= 1 k
, C
L
= 10pF
25C
50
CS
Channel Separation
f = 5MHz
25C
85
dB
SR
Slew Rate
[1]
V
S
= 15V, R
L
= 1000
25C
200
275
V/s
V
S
= 5V, R
L
= 500
25C
200
V/s
FPBW
Full-Power Bandwidth
[2]
V
S
= 15V
25C
3.2
4.4
MHz
V
S
= 5V
25C
12.7
MHz
t
r
, t
f
Rise Time, Fall Time
0.1V Step
25C
3.0
ns
OS
Overshoot
0.1V Step
25C
20
%
t
PD
Propagation Delay
25C
2.5
ns
t
s
Settling to +0.1%
(A
V
= +1)
V
S
= 15V, 10V Step
25C
80
ns
V
S
= 5V, 5V Step
25C
60
ns
dG
Differential Gain
[3]
NTSC/PAL
25C
0.02
%
dP
Differential Phase
[3]
NTSC/PAL
25C
0.07
eN
Input Noise Voltage
10kHz
25C
15.0
nV
Hz
iN
Input Noise Current
10kHz
25C
1.50
pA
Hz
CI STAB
Load Capacitance Stability
A
V
= +1
25C
Infinite
pF
1. Slew rate is measured on rising edge.
2. For V
S
= 15V, V
OUT
= 20V
PP
. For V
S
= 5V, V
OUT
= 5V
PP
. Full-power bandwidth is based on slew rate measurement using: FPBW = SR/(2
*
Vpeak).
3. Video Performance measured at V
S
= 15V, A
V
= +2 with 2 times normal video level across R
L
= 150
. This corresponds to standard video levels
across a back-terminated 75
load. For other values of R
L
, see curves.
4
EL2245C, EL2445C
Dual/Quad Low-Power 100MHz Gain-of-2 Stable Op Amp
E
L
2
2
4
5
C
,
E
L
2
4
4
5
C
Test Circuit
5
EL2245C, EL2445C
Dual/Quad Low-Power 100MHz Gain-of-2 Stable Op Amp
E
L
2
2
4
5
C
,
E
L
2
4
4
5
C
Typical Performance Curves
Non-Inverting
Frequency Response
Inverting Frequency Response
Frequency Response for
Various Load Resistances
Equivalent Input Noise
Output Voltage Swing
vs Frequency
Open-Loop Gain and
Phase vs Frequency
CMRR, PSRR and Closed-Loop
Output Resistance vs
Frequency
2nd and 3rd Harmonic
Distortion vs Frequency
Settling Time vs
Output Voltage Change
Supply Current vs
Supply Voltage
Common-Mode Input Range vs
Supply Voltage
Output Voltage Range
vs Supply Voltage
PDF 
ZIP