ELANT EL2090CN, EL2090CM Datasheet

EL2090C

100 MHz DC-Restored Video Amplifier

EL2090C January 1996 Rev D

Features

# Complete video level restoration

system

# 0.01% differential gain and 0.02

differential phase accuracy at
NTSC

# 100 MHz bandwidth
# 0.1 dB flatness to 20 MHz
# Sample-and-hold has 15 nA

typical leakage and 1.5 pC charge
injection

# System can acquire DC

correction level in 10 ms, or 5 scan
lines of 2 ms each, to (/2 IRE

e

S

g

5V tog15V

# V
# TTL/CMOS hold signal

Applications

# Input amplifier in video

equipment

# Restoration amplifier in video

mixers

Ordering Information

Part No. Temp. Range Pkg. Outline

EL2090CN 0§Ctoa75§C 14-Pin P-DIP MDP0031

EL2090CM 0§Ctoa75§C 16-Lead SOL MDP0027

General Description

The EL2090C is the first complete DC-restored monolithic vid­eo amplifier sub-system. It contains a very high-quality video
amplifier and a nulling sample-and-hold amplifier specifically

§

designed to stabilize video performance. When the HOLD logic
input is set to a logic 0 during a horizontal sync, the sample­and-hold amplifier may be used as a general-purpose op-amp to
null the DC offset of the video amplifier. When the HOLD in­put goes to a logic 1 the sample-and-hold stores the correction
voltage on the hold capacitor to maintain DC correction during
the subsequent scan line.

The video amplifier is optimized for video characteristics, and
performance at NTSC is nearly perfect. It is a current-feedback
amplifier, so that
closed-loop gains. The amplifier easily drives video signal levels
into 75X loads. With 100 MHz bandwidth, the EL2090 is also
useful in HDTV applications.

The sample-and-hold is optimized for fast sync pulse response.
The application circuit shown will restore the video DC level in
five scan lines, even if the HOLD pulse is only 2 ms long. The
output impedance of the sample-and-hold is low and constant
over frequency and load current so that the performance of the
video amplifier is not compromised by connections to the DC
restore circuitry.

Ý

The EL2090C is fabricated in Elantec’s proprietary Comple­mentary Bipolar process which produces NPN and PNP tran­sistors with equivalent AC and DC performance. The EL2090C
is specified for operation over the 0
range.

b

3 dB bandwidth changes little at various

Cto75§C temperature

§

Connection Diagrams

14-Pin DIP Package 16-Pin SOL Package

2090– 1

2090– 2

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. Patent pending.

©

1990 Elantec, Inc.

CMSÝ2090DS

EL2090C

100 MHz DC-Restored Video Amplifier

Absolute Maximum Ratings

a

Voltage between V
Voltage between V

V
Current into V

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

Test Level Test Procedure

,C

S/H

b

IN

HOLD

Current 60 mA

OUT

b

IN

I 100% production tested and QA sample tested per QA test plan QCX0002.

II 100% production tested at T

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

b

and V

, S/H

a

IN

, and GND pins (Va)a0.5V

,

a

IN

and HOLD Pins 5 mA

T

MAX

and T

MIN

A

per QA test plan QCX0002.

e

(T

25§C)

A

36V

Current S/H
Internal Power Dissipation See Curves

to (V

b)b

0.5V

Operating Ambient Temperature Range 0
Operating Junction Temperature

Plastic DIP or SOL 150

Storage Temperature Range

e

25§C and QA sample tested at T

e

25§C for information purposes only.

A

OUT

b

e

T

J

C

e

25§C,

A

16 mA

Cto75§C

§

65§Ctoa150§C

e

TA.

§

Open Loop DC Electrical Characteristics

e

g

V

S

Parameter Description Temp Min Typ Max Test Level Units

I

S

Video Amplifier Section (Not Restored)

V

OS

I

a

B

I

b

B

R

OL

A

VOL

V

O

I

SC

Sample-And-Hold Section

V

OS

I

B

I

OS

R

IN, DIFF

R

IN, COMM

V

CM

15V; R

L

e

150X,T

e

25§C unless otherwise specified

A

Total Supply Current Full 14 17 II mA

Input Offset Voltage Full 8 70 II mV

a

VINInput Bias Current Full 2 15 II mA

b

VINInput Bias Current Full 30 150 II mA

Transimpedance 25§C 300 V V/mA

Open-Loop Voltage Gain;

e

g

V

OUT

2V

Output Voltage Swing

e

g

V

S

e

g

V

S

15V; R
5V; R

e

2kX

L

e

150X

L

Full 56 65 II dB

Full

Full

g

g

3.0

g

12

13 II V

g

3.5 II V

Short-Circuit Current;

a

VINSet tog2V;bV

to Ground through 1 kX

IN

25§C

g

g

50

g

90

160 II mA

Input Offset Voltage Full 2 10 II mV

Input Bias Current Full 0.5 2.5 II mA

Input Offset Current Full 0.05 0.5 II mA

Input Differential Resistance 25§C 200 V kX

Input Common-Mode Resistance 25§C 100 V MX

Common-Mode Input Range Full

g

g

11

12.5 II V

C

TDis 3.9in

2

EL2090C

100 MHz DC-Restored Video Amplifier

Open Loop DC Electrical Characteristics

e

g

V

S

Parameter Description Temp. Min Typ Max Test Level Units

Sample-And-Hold Section Ð Contd.

A

VOL

CMRR Common-Mode Rejection Ratio

PSRR Power-Supply Rejection Ratio

V

thresh

I

droop

I

charge

V

O

I

SC

Closed Loop AC Electrical Characteristics

e

g

V

S

Parameter Description Min Typ Max Test Level Units

Video Amplifier Section

SR SlewRate; V

BW Bandwidth;b3 dB 75 100 III MHz

Peaking
dG Differential Gain;

di Differential Phase;

Sample-And-Hold Section

BW Gain-Bandwidth Product 1.3 V MHz

DQ Sample to Hold Charge

DT Sample to Hold or Hold to

T

s

Note 1: The logic input is between 0V and 5V, with a 220X resistor in series with the HOLD pin and 39 pF capacitor from HOLD pin

15V; R

L

15V; C

L

to ground.

e

150X,T

e

25§C unless otherwise specified Ð Contd.

A

Large Signal Voltage Gain Full 15k 50k II V/V

V

V

CM

S

e

e

g

11V

g

5V tog15V

Full 75 95 II dB

Full 75 95 II dB

HOLD Pin Logic Threshold Full 0.8 1.4 2.0 II V

Hold Mode Droop Current Full 10 50 II nA

Charge Current Available to
Chold

Output Swing; R

e

2k Full

L

Short-Circuit Current 25§C

e

15 pF; C

(bVIN)e2.5 pF; R

stray

fromb2toa2V 600 V V/ms

OUT

g

1 dB 35 60 III MHz

g

0.1 dB 10 20 III MHz

F

Full

e

e

R

G

300X;R

g

g

g

L

90

10

10

e

g

135 II mA

g

13 II V

g

150X;C

17

hold

g

40 II mA

e

100 pF; T

e

25§C

A

VINfromb0.7V to 0.7V; 0.01 V %

e

F

3.58 MHz

V

fromb0.7V to 0.7V; 0.02 V

IN

Fe3.58 MHz

Injection (Note 1)

Sample Delay Time

Sample to Hold Settling
Time to 2 mV

1.5 5 III pC

20 V ns

200

V

§

ns

TDis 2.3inTDis 3.4in

3

EL2090C

100 MHz DC-Restored Video Amplifier

Figure 1. Typical Application (A

Typical Performance Curves

Relative Frequency Response
for Various Gains

Frequency Response Flatness
for Various Load
and Supply Conditions

ea

2)

V

Frequency Response with
Different Loads (A

Frequency Response Flatness vs
C

ea

,A

b

IN

V

ea

V

2

2090– 3

2)

2090– 4

2090– 5

4