ELANT EL4093CS, EL4093CN Datasheet

EL4093C

300 MHz DC-Restored Video Amplifier

EL4093C January 1996 Rev B

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 150X 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§Ctoa85§C 16-pin P-DIP MDP0031

EL4093CS -40§Ctoa85§C 16-Lead SOIC MDP0027

General Description

The EL4093C is a complete DC-restored video amplifier subsys­tem, 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 am­plifier. 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§Ctoa85§C and is packaged in plastic 16-pin DIP and 16-

lead SOIC.

Connection Diagram

Ý

Demo Board

A demo PCB is available for this
product. Request ‘‘EL4093 Demo
Board.’’

44093– 1

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.

EL4093C

300 MHz DC-Restored Video Amplifier

Absolute Maximum Ratings

g

g

b

65§Ctoa150§C

e

TA.

C

Units

Units

10 mA

6mA

8V

I

S/H amplifier output current

OUT2

I

Maximum current into other pins

IN

P

Maximum Power Dissipation See Curves

D

b

T

Operating Ambient Temperature Rangeb40§Ctoa85§C

A

T

Operating Junction Temperature 150§C

J

T

Storage Temperature Range

ST

e

T

J

e

25§C,

A

Power supplies atg5V, T

e

25§C

A

Test

Level

V

Vato VbSupply Voltage 12.6V

S

V

Voltage at HOLD input

HOLD

V

Voltage at any other input Vato V

IN

DVINDifference between Sample and Hold inputs
I

Video amplifier output current

OUT1

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

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

T

MAX

and T

b

(DGND

0.7) to (DGNDa5.5V)

per QA test plan QCX0002.

MIN

g

g

30 mA

e

25§C and QA sample tested at T

A

e

25§C for information purposes only.

A

Open-Loop DC Electrical Characteristics

Parameter Description Min Typ Max

I

S,HOLD

I

S,SAMPLE

Total Supply current in HOLD mode 9.5 11.5 I mA

Total Supply current in SAMPLE mode 8.5 10.5 I mA

Video Amplifier Section (Not Restored)

Parameter Description Min Typ Max

V

OS

I

a

B

I

b

B

R

OL

V

O

I

SC

Input Offset Voltage 10 110 I mV

Non-Inverting Input Bias Current 10 25 I mA

Inverting Input Bias Current 15 50 I mA

Transimpedance

e

g

V

OUT

Output Voltage Swing

e

R

150X

L

2.5V, R

e

150X 150 400 I kX

L

g

3

g

3.5 I V

Output Short-Circuit Current 60 100 I mA

Test

Level

TABWIDE

TDis0.7in

TDis1.7in TDis1.7in

2

EL4093C

300 MHz DC-Restored Video Amplifier

Open-Loop DC Electrical Characteristics

Power supplies atg5V, T

Sample and Hold Section

Parameter Description Min Typ Max

V

OS

TCV

OS

I

B

I

OS

TCI

OS

V

CM

g

m

CMRR Common Mode Rejection Ratio (V

V

IL

V

IH

V

GND

I

DROOP

I

CHARGE

V

O

I

O

Input Offset Voltage 0.5 1.5 I mV

Average Offset Voltage Drift 6 V mV/§C

Input Bias Current 1 2 I mA

Input Offset Current 10 200 I nA

Average Offset Current Drift 0.1 V nA/§C

Common Mode Input Range

Transconductance (R

HOLD Logic Input Low (referenced to Digital GND) 0.8 I V

HOLD Logic Input High (referenced to Digital GND) 2.0 I V

Digital GND Reference Voltage (Vb)(V

Hold Mode Droop Current 10 70 I nA

Charge Current Available to C

Output Voltage Swing (R

Output Current Swing (R

e

25§C Ð Contd.

A

g

g

2.5

2.8 I V

e

500X) 5 15 I A/V

L

b

2.5V toa2.5V) 70 90 I dB

CM

g

g

5.5

HOLD

e

10kX)

L

e

0X)

L

g

g

8.5 I mA

g

3

3.5 I V

g

4.5

5.5 I mA

Closed-Loop AC Electrical Characteristics

Power supplies atg5V, T

e

25§C, R

A

e

e

R

G

750X,R

F

L

e

150X,C

e

5 pF, C

L

(parasitic)e1.8 pF

b

IN

a

b

)

4.0 I V

Test

Level

Units

Video Amplifier Section

Parameter Description Min Typ Max

BW,b3dB

b

3 dB Small-Signal Bandwidth 300 V MHz

BW,g0.1 dB 0.1 dB Flatness Bandwidth 50 V MHz

Peaking Frequency Response Peaking 0 V dB

SR Slew rate, V

betweenb2V anda2V 1500 V V/ms

OUT

dG Differential Gain Error, Voffset betweenb714 mV anda714 mV 0.04 V %

di Differential Phase Error, Voffset betweenb714 mV anda714 mV 0.02 V

3

Test

Levels

Units

§

TDis1.5in TDis1.5in

EL4093C

300 MHz DC-Restored Video Amplifier

Closed-Loop AC Electrical Characteristics

Power supplies atg5V, T

e

25§C, R

A

Sample and Hold Section

Parameter Description Min Typ Max

DI

DT

DT

T

STEP

SH

HS

AC

Change in Sample to Hold Output Current Due to Hold Step 0.1 V mA

Sample to Hold Delay Time 15 V ns

Hold to Sample Delay Time 40 V ns

Settling Time to 1% (DC Restored Amplifier Output) 2.2 V ms
Video Amplifier Input from 0 to 1V

e

e

R

G

750X,R

F

L

e

150X,C

e

5 pF, C

L

HOLD

e

2.2 nF

Typical Application

Test

Levels

Units

TDis1.2in

44093– 2

4

Typical Performance Curves

EL4093C

300 MHz DC-Restored Video Amplifier

Non-inverting Frequency
Response (Gain)

Inverting Frequency
Response (Gain)

Frequency Response for
Various RFand R

G

44093– 4

44093– 7

Non-inverting Frequency
Response (Phase)

Inverting Frequency
Response (Phase)

Frequency Response
for Various C

IN

44093– 5

44093– 8

Frequency Response
for Various R

Frequency Response
for Various C

3 dB Bandwidth vs
Temperature (Video Amp)

L

L

44093– 6

44093– 9

44093– 10

44093– 11

44093– 12

5