ELANT EL4390CN, EL4390CM Datasheet

EL4390C

Triple 80 MHz Video Amplifier with DC Restore

EL4390C November 1994, Rev A

Features

# 80 MHzb3 dB bandwidth for

gains of 1 to 10

# 800 V/ms slew rate
# 15 MHz bandwidth flat to 0.1 dB
# Excellent differential gain and

phase

# TTL/CMOS compatible DC

restore function

# Available in 16 lead P-DIP, 16

lead SOL

Applications

# RGB drivers requiring DC

restoration

# RGB multiplexers requiring DC

restoration

# RGB building blocks
# Video gain blocks requiring DC

restoration

# Sync and color burst processing

Ordering Information

Part No. Temp. Range Package Outline

EL4390CNb40§Ctoa85§C 16-Pin P-DIP MDP0031

EL4390CMb40§Ctoa85§C 16-Lead SOL MDP0027

General Description

The EL4390C is three wideband current-mode feedback amplifi­ers optimized for video performance, each with a DC restore
amplifier. The DC restore function is activated by a common
TTL/CMOS compatible control signal while each channel has a
separate restore reference.

Each amplifier can drive a load of 150X at video signal levels.
The EL4390C operates on supplies as low as

g

4V up tog15V.

Being a current-mode feedback design, the bandwidth stays rel­atively constant at approximately 80MHz over the
gain range. The EL4390C has been optimized for use with
1300X feedback resistors.

Connection Diagram

Ý

g

1tog10

4390– 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.

©

1994 Elantec, Inc.

EL4390C

Triple 80 MHz Video Amplifier with DC Restore

Absolute Maximum Ratings

Voltage between V
Voltage at V
Voltage at V
Voltage between 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

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

a

S

aa

S

bb

S

IN

a

and V

IN

ba

and V

S

a

T

and V

IN

MAX

IN

b

and T

b

A

per QA test plan QCX0002.

MIN

Open Loop DC Electrical Characteristics

Parameter Description Temp Min Typ Max

e

(T

25§C)

A

g

Internal Power Dissipation See Curves

33V

Operating Ambient Temp. Range

18V

Operating Junction Temperature 150

18V

Storage Temperature Range

6V

5mA

e

25§C and QA sample tested at T

e

25§C for information purposes only.

A

e

25§C,

A

Supplies atg15V, Loade1KX

b

40§Ctoa85§C

b

65§Ctoa150§C

e

e

T

J

C

Test

Level

§

TA.

Units

Amplifier Section (not restored)

V

OS

a

I

B

b

I

B

Input Offset Voltage

a

I

Input Bias Current

IN

b

I

Input Bias Current

IN

ROLTransimpedance (Note 1)

b

R

IN

b

I

N

Resistance

CMRR Common-Mode Rejection Ratio (Note 2)

PSRR Power Supply Rejection Ratio (Note 4)

V

O

I

SC

I

SY

Output Voltage Swing; R

Short-Circuit Current

Supply Current (Quiescent)

e

1kX

L

a

25§C 2 15 II mV

a

25§C 0.2 5 II mA

a

25§C1065IImA

a

25§C 100 220 II kX

a

25§C50 VX

a

25§C50 56 II dB

a

25§C50 70 II dB

a

25§C

a

25§C 45 70 100 II mA

a

25§C10 20 32 II mA

g

g

12

13 II V

Restoring Section

VOS, COMP Composite Input Offset Voltage (Note 3)

I

B

I

OUT

a

,

R

Restore I

Restoring Current Available

a

Input Bias Current

N

PSRR Power Supply Rejection Ratio (Note 4)

G

OUT

Conductance

ISY, RES Supply Current, Restoring

VIL, RES RES Logic Low Threshold

VIH, RES RES Logic High Threshold

a

25§C 8 35 II mV

a

25§C 0.2 5 II mA

a

25§C2 4 II mA

a

25§C50 70 II dB

a

25§C 8 V mA/V

a

25§C10 23 37 II mA

a

25§C 1.0 1.4 II V

a

25§C 1.4 1.8 II V

C

TDis4.1in

2

EL4390C

Triple 80 MHz Video Amplifier with DC Restore

Open Loop DC Electrical Characteristics

Parameter Description Temp Min Typ Max

Supplies atg15V, Loade1KX Ð Contd.

Test

Level

Restoring Section

IIL, RES RES Input Current, Logic Low

IIH, RES RES Input Current, Logic High

Note 1: For current feedback amplifiers, A

e

g

Note 2: V
Note 3: Measured from V
Note 4: V

10V for V

CM

is measured at V

OS

e

S

to amplifier output, while restoring.

CL

e

S

g

15V.

g

4.5V and V

VOL

e

S

ROL/R

e

a

25§C 2 10 II mA

a

25§C 0.5 3 II mA

b

.

IN

g

16V, both supplies are changed simultaneously.

Closed Loop AC Electrical Characteristics

Supplies atg15V, Loade150X and 15 pF, T

Parameter Description Min Typ Max

Amplifier Section

SR Slew Rate (Note 5) 800 V V/ms

SR Slew Rate w/g5V Supplies (Note 5) 550 V V/ms

BW Bandwidth,b3dB, A

g

5V Supplies,b3dB 72 V MHz

BW Bandwidth,b0.1 dB 20 V MHz

g

5V Supplies,b0.1dB 14 V MHz

dG Differential Gain at 3.58 MHz 0.02 V %

g

at

5V Supplies (Note 6) 0.02 V %

di Differential Phase at 3.58 MHz 0.03 V (§)

g

at

5V Supplies (Note 6) 0.06 V (§)

Restoring Section

T

RE

T

RD

Time to Enable Restore 35 V ns

Time to Disable Restore 35 V ns

Note 5: SR is measured at 20% to 80% of 4V pk-pk square wave, with A

b

Note 6: DC offset from
Note 7: Test fixture was designed to minimize capacitance at the I

capacitance to ground at this very sensitive pin. See application notes for further details.

0.714V toa0.714V, AC amplitude is 286m Vp-p, equivalent to 40 ire.

e

25§C (See note 7 re: test fixture)

A

Test

Level

e

1 95 V MHz

V

e

e

5, R

F

820X,R

V

b

input. A ‘‘good’’ fixture should have less than 2 pF of stray

N

e

200X.

G

Units

TDis0.9inTDis2.7in

Units

3

EL4390C

Triple 80 MHz Video Amplifier with DC Restore

Table 1. Charge Storage Capacitor Value vs. Droop and Charging Rates

Cap Value Droop in Charge in Charge in

(nF) 60mS (mV) 2mS (mV) 4mS (mV)

10 30 400 800

22 13.6 182 364

47 6.4 85 170

100 3.0 40 80

220 1.36 18 36

These numbers represent the worst case bias current, and the worst case charging current. Note that to
get the full (2mA

a

) charging current, the clamp input must havel250mV of error voltage.

Note that the magnitude of the bias current will decrease as temperature increases.

The basic droop formula is :

V (droop)

e

c

I

(Line timebCharge time) / capacitor value

a

B

and the basic charging formula is:

V (charge)

Where I

I

OUT

e

is:

OUT

e

(Clamp voltagebINavoltage) / 120

I

OUT

c

Charge time / capacitor value

4

Triple 80 MHz Video Amplifier with DC Restore

Typical Performance Curves

Gain Flatness
for Various R

e

V

S

g

15V, A

F

e

0dB

V

Gain Flatness
for Various R

e

g

V

5V, A

S

EL4390C

F

e

0dB

V

Gain Flatness
for Various R

e

g

15V, A

V

S

and RGValues

F

e

6dB

V

Gain Flatness
for Various R

e

g

5V, A

V

S

Gain Flatness

e

g

15V, A

V

S

as Shown

R

F/RG

and RGValues

F

e

6dB

V

e

14 dB,

V

4390– 2

4390– 6

Phase Shift

e

e

F

e

S
F/RG

V

R

G

g

5V, A

as Shown

2,

e

for A
R

Gain Flatness
V
R

1300X

V

e

14 dB,

4390– 3

4390– 5

Phase Shift for A

e

e

R

e

S

V

e

200X,V

G

g

e

5 dB, R

1000X

5V and V

S

R

F

at V

Phase Shift
for A
R

G

4390– 4

e

2,

V

e

g

15V

S

4390– 7

e

820X,

F

e

g

5V

4390– 8

4390– 9

4390– 10

5