ELANT EL2020CN, EL2020CM Datasheet

EL2020C

50 MHz Current Feedback Amplifier

EL2020C December 1995 Rev G

Features

# Slew rate 500 V/ ms

g

#

33 mA output current

# Drives # Differential phase

g

2.4V into 75X

k

0.1

§

# Differential gaink0.1% # V supply

g

5V tog18V

# Output short circuit protected # Uses current mode feedback # 1% settling time of 50 ns for 10V

step

# Low cost # 9 mA supply current # 8-pin mini-dip

Applications

# Video gain block # Residue amplifier # Radar systems # Current to voltage converter # Coax cable driver with

gain of 2

Ordering Information

Part No. Temp. Range Pkg. Outline

EL2020CNb40§Ctoa85§C P-DIP MDP0031

EL2020CMb40§Ctoa85§C 20-Lead MDP0027

SOL

General Description

The EL2020 is a fast settling, wide bandwidth amplifier optimized for gains between monolithic Complementary Bipolar process, this amplifier uses current mode feedback to achieve more bandwidth at a given gain then a conventional voltage feedback operational amplifier.

The EL2020 will drive two double terminated 75X coax cables to video levels with low distortion. Since it is a closed loop device, the EL2020 provides better gain accuracy and lower distortion than an open loop buffer. The device includes output short circuit protection, and input offset adjust capability.

The bandwidth and slew rate of the EL2020 are relatively independent of the closed loop gain taken. The 50 MHz bandwidth at unity gain only reduces to 30 MHz at a gain of 10. The EL2020 may be used in most applications where a conventional op amp is used, with a big improvement in speed power product.

Elantec products and facilities comply with Elantec document, QRA-1: Processing-Monolithic Products.

b

10 anda10. Built using the Elantec

Connection Diagrams

SOL

Ý

2020– 2

DIP

2020– 1

Manufactured under U.S. Patent No. 4,893,091.

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.

©

1989 Elantec, Inc.

EL2020C

50 MHz Current Feedback Amplifier

Absolute Maximum Ratings

V V DV I I P

I

S

IN

INS

D

OP

Supply Voltage Input Voltage Differential Input Voltage

IN

Input Current (Pins 2 or 3) Input Current (Pins 1, 5, or 8) Maximum Power Dissipation

(See Curves) 1.25W

Peak Output Current Short Circuit

(25§C)

g

18V or 36V

g

15V or V

g

Protected

g

10V

10 mA

5mA

T

Operating Temperature Range

A

T

S

Operating Junction Temperature

J

T

Plastic Package, SOL 150

Storage Temperature

ST

b

40§Ctoa85§C

b

65§Ctoa150§C

C

§

Output Short Circuit Duration

(Note 2) Continuous

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

per QA test plan QCX0002.

MIN

Open Loop Characteristics

Parameter Description Temp

VOS(Note 1) Input Offset Voltage 25§C

DVOS/DT Offset Voltage Drift

e

25§C and QA sample tested at T

A

e

25§C for information purposes only.

A

e

g

V

15V

S

T

MIN,TMAX

e

25§C,

A

Limits

Min Typ Max

b

10 3

b

15

a

b

30 V mV/§C

10 I mV

15 III mV

e

T

TA.

J

C

Test Level Units

CMRR (Note 3) Common Mode Rejection Ratio ALL 50 60 II dB

PSRR (Note 4) Power Supply Rejection Ratio 25§C6575 I dB

T

a

I

IN

a

R

IN

a

IPSR (Note 4) Non-Inverting Input Current 25§C, T

Non-inverting Input Current 25§C, T

Non-Inverting Input Resistance ALL 1 5 II MX

Power Supply Rejection

b

IIN(Note 1)

b

Input Current 25§C, T

MIN,TMAX

MAX

T

MIN

MAX

T

MIN

MAX

T

MIN

60 III dB

b

15 5

b

25

a

15 II mA

a

25 III mA

0.05 0.5 II mA/V

1.0 III mA/V

b

40 10

b

50

a

40 II mA

a

50 III mA

TDis 2.8in

2

50 MHz Current Feedback Amplifier

e

Open Loop Characteristics

Parameter Description Temp

b

ICMR (Note 3)bInput Current 25§C, T

b

IPSR (Note 4)

R

ol

A

VOL1

A

VOL2

V

O

I

OUT

I

s

I

s off

I

logic

I

D

I

e

Common Mode Rejection

b

Input Current 25§C, T

Power Supply Rejection

Transimpedence (DV

e

R

400X,V

L

OUT

e

OUT

g

Open Loop DC Voltage Gain 25§C, T

e

R

400X,V

L

OUT

e

g

Open Loop DC Voltage Gain 25§C, T

e

R

100X,V

L

OUT

e

g

Output Voltage Swing 25§C, T

e

R

400X

L

Output Current 25§C, T

e

R

400X

L

Quiescent Supply Current 25§C 9 12 I mA

Supply Current, Disabled, V

Pin 8 Current, Pin 8e0V ALL 1.1 1.5 II mA

Min Pin 8 Current to Disable ALL 120 250 II mA

Max Pin 8 Current to Enable ALL 30 II mA

g

V

15V Ð Contd.

S

/D(bIIN)) 25§C, T

10V

2.5V

e

0V ALL 5.5 7.5 II mA

8

MAX

T

MIN

MAX

T

MIN

MAX

T

MIN

MAX

T

MIN

MAX

T

MIN

MAX

T

MIN

MAX

T

MIN

T

MIN,TMAX

EL2020C

Limits

Min Typ Max

0.5 2.0 II mA/V

0.05 0.5 II mA/V

300 1000 II V/mA

50 III V/mA

70 80 II dB

60 III dB

60 70 II dB

55 III dB

g

12

13 II V

11 III V

g

30

32.5 II mA

27.5 III mA

Test Level Units

4.0 III mA/V

1.0 III mA/V

15 III mA

TDis 4.1in

3

EL2020C

50 MHz Current Feedback Amplifier

e

AC Closed Loop Characteristics EL2020C

g

V

S

Parameter Description Min Typ Max

Closed Loop Gain of 1 V/V (0 dB), R SR1 Slew Rate, R FPBW1 Full Power Bandwidth (Note 5) 4.77 7.95 I MHz t

1 Rise Time, R

r

t

1 Fall Time, R

f

tp1 Propagation Delay, R

l

e

l

e

400X,V

e

100X,V 100X,V

e

l

e

O

OUT

100X,V

Closed Loop Gain of 1 V/V (0 dB), R BW t

s

t

s

b

3 dB Small Signal Bandwidth, R

1% Settling Time, R

0.1% Settling Time, R

e

l

400X,V

e

400X,V

Closed Loop Gain of 10 V/V (20 dB), R SR10 Slew Rate, R FPBW10 Full Power Bandwidth (Note 5) 4.77 7.95 I MHz t

10 Rise Time, R

r

t

10 Fall Time, R

f

t

10 Propagation Delay, R

p

e

l

e

l

400X,V

e

100X,V 100X,V

e

l

e

O

OUT

100X,V

Closed Loop Gain of 10 V/V (20 dB), R BW t

s

t

s

Note 1: The offset voltage and inverting input current can be adjusted with an external 10 kX pot between pins 1 and 5 with the

wiper connected to V Note 2: A heat sink is required to keep the junction temperature below the absolute maximum when the output is short circuited. Note 3: V

g

Note 4: Note 5: Full Power Bandwidth is guaranteed based on Slew Rate measurement. FPBW

b

1% Settling Time, R

0.1% Settling Time, R

e

g

10V.

CM

4.5VsV

S

3 dB Small Signal Bandwidth, R

e

400 X,V

l

e

400X,V

l

(Pin 7) to make the output offset voltage zero.

CC

s

g

18V.

e

1kX

F

g

10V, test at V

e

1V, 10% to 90% 6 V ns

e

1V, 10% to 90% 6 V ns

OUT

F

e

l

e

10V 50 V ns

O

e

O

g

10V, Test at V

e

1V, 10% to 90% 25 V ns

e

1V, 10% to 90% 25 V ns

OUT

e

l

e

O

e

O

e

g

5V 300 500 I V/ms

O

e

1V, 50% Points 8 V ns

e

820X

100X,V

e

100 mV 50 V MHz

O

10V 90 V ns

e

1kX,R

F

e

1V, 50% points 12 V ns

e

680X,R

F

100X,V

10V 55 V ns

e

111X

G

e

g

5V 300 500 I V/ms

O

e

76X

G

e

100 mV 30 V MHz

O

10V 280 V ns

15V, T

e

25§C

A

SR/2qV

peak

Test

Level

Units

.

TDis 3.2in

4

EL2020C

50 MHz Current Feedback Amplifier

Typical Performance Curves

ea

A

1 Gain vs Frequency Frequency

VCL

Settling Time vs Output Swing

Non-Inverting Gain of One

b

3 dB Bandwidth vs

Supply Voltage

Phase Shift vs

Rise Time and Prop Delay vs Temperature

Slew Rate vs Supply Voltage

Slew Rate vs Temperature

2020– 4

5

EL2020C

50 MHz Current Feedback Amplifier

Typical Performance Curves

eb

A

Settling Time vs Output Swing

1 Gain vs Frequency Frequency

VCL

Ð Contd. Inverting Gain of One

b

3 dB Bandwidth vs

Supply Voltage

Phase Shift vs

Rise Time and Prop Delay vs Temperature

Slew Rate vs Supply Voltage

Slew Rate vs Temperature

2020– 5

6