EL4093C
January
1996
Rev
B
EL4093C
300 MHz DC-Restored Video Amplifier
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
1995 Elantec Inc
Features
High accuracy DC restoration for
video
Low supply current of 9 5 mA
typ
300 MHz bandwidth
1500V ms slew rate
0 04% differential gain and 0 02
differential phase into 150
X for
NTSC
1 5 mV max restored DC offset
Sample and hold amplifier with
fast enable and low leakage
TTL-compatible HOLD logic
input
Applications
Input amplifier in video
equipment
Restoration amplifier in video
mixers
Ordering Information
Part No
Temp Range
Package
Outline
EL4093CN -40 C to
a
85 C 16-pin P-DIP
MDP0031
EL4093CS
-40 C to
a
85 C 16-Lead SOIC MDP0027
Demo Board
A demo PCB is available for this
product
Request ``EL4093 Demo
Board ''
General Description
The EL4093C is a complete DC-restored video amplifier subsys-
tem featuring low power consumption and high slew rate It
contains a current feedback amplifier and a sample and hold
amplifier designed to stabilize video performance When the
HOLD logic input is low the sample and hold may be used as a
general purpose op amp to null the DC offset of the video am-
plifier When the HOLD input goes high the sample and hold
stores the correction voltage on the hold capacitor to maintain
DC correction during the subsequent video scan line
The sample and hold amplifier contains a current output stage
that greatly simplifies its connection to the video amplifier Its
high output impedance also helps to preserve video linearity at
low supply voltages For ease of interfacing the HOLD input is
TTL-compatible This device has an operational temperature of
b
40 C to
a
85 C and is packaged in plastic 16-pin DIP and 16-
lead SOIC
Connection Diagram
44093 1
EL4093C
300 MHz DC-Restored Video Amplifier
Absolute Maximum Ratings
V
S
V
a
to V
b
Supply Voltage
12 6V
V
HOLD
Voltage at HOLD input
(DGND
b
0 7) to (DGND
a
5 5V)
V
IN
Voltage at any other input
V
a
to V
b
DV
IN
Difference between Sample and Hold inputs
g
8V
I
OUT1
Video amplifier output current
g
30 mA
I
OUT2
S H amplifier output current
g
10 mA
I
IN
Maximum current into other pins
g
6 mA
P
D
Maximum Power Dissipation
See Curves
T
A
Operating Ambient Temperature Range
b
40 C to
a
85 C
T
J
Operating Junction Temperature
150 C
T
ST
Storage Temperature Range
b
65 C to
a
150 C
Important Note
All parameters having Min Max specifications are guaranteed The Test Level column indicates the specific device testing actually
performed during production and Quality inspection Elantec performs most electrical tests using modern high-speed automatic test
equipment specifically the LTX77 Series system Unless otherwise noted all tests are pulsed tests therefore T
J
e
T
C
e
T
A
Test Level
Test Procedure
I
100% production tested and QA sample tested per QA test plan QCX0002
II
100% production tested at T
A
e
25 C and QA sample tested at T
A
e
25 C
T
MAX
and T
MIN
per QA test plan QCX0002
III
QA sample tested per QA test plan QCX0002
IV
Parameter is guaranteed (but not tested) by Design and Characterization Data
V
Parameter is typical value at T
A
e
25 C for information purposes only
Open-Loop DC Electrical Characteristics
Power supplies at
g
5V T
A
e
25 C
Parameter
Description
Min
Typ
Max
Test
Units
Level
I
S HOLD
Total Supply current in HOLD mode
9 5
11 5
I
mA
I
S SAMPLE
Total Supply current in SAMPLE mode
8 5
10 5
I
mA
Video Amplifier Section (Not Restored)
Parameter
Description
Min
Typ
Max
Test
Units
Level
V
OS
Input Offset Voltage
10
110
I
mV
I
Ba
Non-Inverting Input Bias Current
10
25
I
mA
I
Bb
Inverting Input Bias Current
15
50
I
mA
R
OL
Transimpedance
V
OUT
e
g
2 5V R
L
e
150
X
150
400
I
k
X
V
O
Output Voltage Swing
g
3
g
3 5
I
V
R
L
e
150
X
I
SC
Output Short-Circuit Current
60
100
I
mA
2
TD
is
07in
TAB
WIDE
TD
is
17in
TD
is
17in
EL4093C
300 MHz DC-Restored Video Amplifier
Open-Loop DC Electrical Characteristics
Power supplies at
g
5V T
A
e
25 C
Contd
Sample and Hold Section
Parameter
Description
Min
Typ
Max
Test
Units
Level
V
OS
Input Offset Voltage
0 5
1 5
I
mV
TCV
OS
Average Offset Voltage Drift
6
V
mV C
I
B
Input Bias Current
1
2
I
mA
I
OS
Input Offset Current
10
200
I
nA
TCI
OS
Average Offset Current Drift
0 1
V
nA C
V
CM
Common Mode Input Range
g
2 5
g
2 8
I
V
g
m
Transconductance (R
L
e
500
X)
5
15
I
A V
CMRR
Common Mode Rejection Ratio (V
CM
b
2 5V to
a
2 5V)
70
90
I
dB
V
IL
HOLD Logic Input Low (referenced to Digital GND)
0 8
I
V
V
IH
HOLD Logic Input High (referenced to Digital GND)
2 0
I
V
V
GND
Digital GND Reference Voltage
(V
b
)
(V
a
)
b
4 0
I
V
I
DROOP
Hold Mode Droop Current
10
70
I
nA
I
CHARGE
Charge Current Available to C
HOLD
g
5 5
g
8 5
I
mA
V
O
Output Voltage Swing (R
L
e
10k
X)
g
3
g
3 5
I
V
I
O
Output Current Swing (R
L
e
0
X)
g
4 5
g
5 5
I
mA
Closed-Loop AC Electrical Characteristics
Power supplies at
g
5V T
A
e
25 C R
F
e
R
G
e
750
X R
L
e
150
X C
L
e
5 pF C
INb
(parasitic)
e
1 8 pF
Video Amplifier Section
Parameter
Description
Min
Typ
Max
Test
Units
Levels
BW
b
3 dB
b
3 dB Small-Signal Bandwidth
300
V
MHz
BW
g
0 1 dB
0 1 dB Flatness Bandwidth
50
V
MHz
Peaking
Frequency Response Peaking
0
V
dB
SR
Slew rate V
OUT
between
b
2V and
a
2V
1500
V
V
ms
dG
Differential Gain Error Voffset between
b
714 mV and
a
714 mV
0 04
V
%
d
i
Differential Phase Error Voffset between
b
714 mV and
a
714 mV
0 02
V
3
TD
is
15in
TD
is
15in
EL4093C
300 MHz DC-Restored Video Amplifier
Closed-Loop AC Electrical Characteristics
Power supplies at
g
5V T
A
e
25 C R
F
e
R
G
e
750
X R
L
e
150
X C
L
e
5 pF C
HOLD
e
2 2 nF
Sample and Hold Section
Parameter
Description
Min
Typ
Max
Test
Units
Levels
DI
STEP
Change in Sample to Hold Output Current Due to Hold Step
0 1
V
mA
DT
SH
Sample to Hold Delay Time
15
V
ns
DT
HS
Hold to Sample Delay Time
40
V
ns
T
AC
Settling Time to 1% (DC Restored Amplifier Output)
2 2
V
ms
Video Amplifier Input from 0 to 1V
Typical Application
44093 2
4
TD
is
12in
EL4093C
300 MHz DC-Restored Video Amplifier
Typical Performance Curves
Response (Gain)
Non-inverting Frequency
44093 4
Response (Phase)
Non-inverting Frequency
44093 5
for Various R
L
Frequency Response
44093 6
Response (Gain)
Inverting Frequency
44093 7
Response (Phase)
Inverting Frequency
44093 8
for Various C
L
Frequency Response
44093 9
Various R
F
and R
G
Frequency Response for
44093 10
for Various C
IN
Frequency Response
44093 11
Temperature (Video Amp)
3 dB Bandwidth vs
44093 12
5
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