EL2280CN - Elantec Semiconductor

EL2180C/EL2280C/EL2480C August 1996, Rev. D

EL2180C/EL2280C/EL2480C

250 MHz/3 mA Current Mode Feedback Amplifiers

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.

Features

#Single (EL2180C), dual

(EL2280C) and quad (EL2480C)

topologies

#3 mA supply current (per

amplifier)

#250 MHz b3 dB bandwidth

#Tiny SOT23-5 Package

(EL2180C)

#Low cost

#Single- and dual-supply

operation down to g1.5V

#0.05%/0.05§diff. gain/diff. phase

into 150X

#1200 V/ms slew rate

#Large output drive current:

100 mA (EL2180C)

55 mA (EL2280C)

55 mA (EL2480C)

#Also available with disable in

single (EL2186C), dual

(EL2286C), and triple (EL2386C)

#Lower power EL2170C/EL2176C

family also available (1 mA/

70 MHz) in single, dual and quad

Applications

#Low power/battery applications

#HDSL amplifiers

#Video amplifiers

#Cable drivers

#RGB amplifiers

#Test equipment amplifiers

#Current to voltage converters

Ordering Information

Part No. Temp. Range Package Outline Ý

EL2180CN b40§Ctoa

85§C 8-Pin PDIP MDP0031

EL2180CS b40§Ctoa

85§C 8-Pin SOIC MDP0027

EL2180CW b40§Ctoa

85§C 5-Pin SOT23*MDP0038

EL2280CN b40§Ctoa

85§C 8-Pin PDIP MDP0031

EL2280CS b40§Ctoa

85§C 8-Pin SOIC MDP0027

EL2480CN b40§Ctoa

85§C 14-Pin PDIP MDP0031

EL2480CS b40§Ctoa

85§C 14-Pin SOIC MDP0027

*See Ordering Information section of

databook.

General Description

The EL2180C/EL2280C/EL2480C are single/dual/quad cur-

rent-feedback operational amplifiers which achieve a b3dB

bandwidth of 250 MHz at a gain of a1 while consuming only

3 mA of supply current per amplifier. They will operate with

dual supplies ranging from g1.5V to g6V, or from single sup-

plies ranging from a3V to a12V. In spite of their low supply

current, the EL2480C and the EL2280C can output 55 mA while

swinging to g4V on g5V supplies. The EL2180C can output

100 mA with similar output swings. These attributes make the

EL2180C/EL2280C/EL2480C excellent choices for low power

and/or low voltage cable-driver, HDSL, or RGB applications.

For applications where board space is extremely critical, the

EL2180C is available in the tiny 5-lead SOT23 package, which

has a footprint 28% the size of an 8-lead SOIC.

For Single, Dual, and Triple applications with disable, consider

the EL2186C (8-Pin Single), EL2286C (14-Pin Dual) or

EL2386C (16-Pin Triple). For lower power applications where

speed is still a concern, consider the EL2170C/El2176C family

which also comes in similar Single, Dual and Quad configura-

tions. The EL2170C/EL2176C family provides a b3 dB band-

width of 70 MHz while consuming 1 mA of supply current per

amplifier.

Connection Diagrams

EL2180C SO, P-DIP EL2280C SO, P-DIP

2180– 1

EL2180C SOT23-5 EL2480C SO, P-DIP

2180– 46

2180– 2

EL2180C/EL2280C/EL2480C

250 MHz/3 mA Current Mode Feedback Amplifiers

Absolute Maximum Ratings

(TAe25§C)

Voltage between VSaand VSba12.6V

Common-Mode Input Voltage VSbto VSa

Differential Input Voltage g6V

Current into aIN or bIN g7.5 mA

Internal Power Dissipation See Curves

Operating Ambient Temperature Range b40§Ctoa

85§C

Operating Junction Temperature

Plastic Packages 150§C

Output Current (EL2180C) g120 mA

Output Current (EL2280C) g60 mA

Output Current (EL2480C) g60 mA

Storage Temperature Range b65§Ctoa

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

Test Level Test Procedure

I100% production tested and QA sample tested per QA test plan QCX0002.

II 100% production tested at T

C and QA sample tested at 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.

VParameter is typical value at T

C for information purposes only.

DC Electrical Characteristics

VSeg5V, RLe150X,T

Ae25§C unless otherwise specified

Parameter Description Conditions Min Typ Max Test Units

Level

VOS Input Offset Voltage 2.5 10 I mV

TCVOS Average Input Offset Measured from TMIN to TMAX 5VmV/§C

Voltage Drift

dVOS VOS Matching EL2280C, EL2480C only 0.5 V mV

aIIN aInput Current 1.5 15 I mA

daIIN aIIN Matching EL2280C, EL2480C only 20 V nA

bIIN bInput Current 16 40 I mA

dbIIN bIIN Matching EL2280C, EL2480C only 2 V mA

CMRR Common Mode Rejection VCM eg3.5V 45 50 I dB

Ratio

bICMR bInput Current Common VCM eg3.5V 5 30 I mA/V

Mode Rejection

PSRR Power Supply Rejection VSis moved from g4V to g6V 60 70 I dB

Ratio

bIPSR bInput Current Power VSis moved from g4V to g6V 1 15 I mA/V

Supply Rejection

ROL Transimpedance VOUT eg2.5V 120 300 I kX

aRIN aInput Resistance VCM eg3.5V 0.5 2 I MX

aCIN aInput Capacitance 1.2 V pF

CMIR Common Mode Input Range g3.5 g4.0 I V

TDis3.8in

EL2180C/EL2280C/EL2480C

250 MHz/3 mA Current Mode Feedback Amplifiers

DC Electrical Characteristics

Ð Contd.

VSeg5V, RLe150X,T

Ae25§C unless otherwise specified

Parameter Description Conditions Min Typ Max Test Units

Level

VOOutput Voltage Swing VSeg5g3.5 g4.0 I V

VSea

5 Single-Supply, High 4.0 V V

VSea

5 Single-Supply, Low 0.3 V V

IOOutput Current EL2180C only 80 100 I mA

EL2280C only, per Amplifier 50 55 I mA

EL2480C only, per Amplifier 50 55 I mA

ISSupply Current Per Amplifier 3 6 I mA

AC Electrical Characteristics

VSeg5V, RFeRGe750Xfor PDIP and SOIC packages, RFeRGe560Xfor SOT23-5 package, RLe150X,T

Ae25§C

unless otherwise specified

Parameter Description Conditions Min Typ Max Test Units

Level

b3dBBW b

3 dB Bandwidth AVea

1 250 V MHz

b3dBBW b

3 dB Bandwidth AVea

2 180 V MHz

0.1 dB BW 0.1 dB Bandwidth AVea

2 50 V MHz

SR Slew Rate VOUT eg2.5V, AVea

2 600 1200 IV V/ms

tr,t

fRise and Fall Time VOUT eg500 mV 1.5 V ns

tpd Propagation Delay VOUT eg500 mV 1.5 V ns

OS Overshoot VOUT eg500 mV 3.0 V %

ts0.1% Settling VOUT eg2.5V, AVeb

115Vns

dG Differential Gain AVea

2, RLe150X(Note 1) 0.05 V %

dP Differential Phase AVea

2, RLe150X(Note 1) 0.05 V §

dG Differential Gain AVea

1, RLe500X(Note 1) 0.01 V %

dP Differential Phase AVea

1, RLe500X(Note 1) 0.01 V §

CSChannel Separation EL2280C, EL2480C only, f e5 MHz 85 V dB

Note 1: DC offset from 0V to 0.714V, AC amplitude 286 mVP-P,fe3.58 MHz.

TDis1.6inTDis2.8in

EL2180C/EL2280C/EL2480C

250 MHz/3 mA Current Mode Feedback Amplifiers

Test Circuit

(per Amplifier)

2180– 3

Simplified Schematic

(per Amplifer)

2180– 4

EL2180C/EL2280C/EL2480C

250 MHz/3 mA Current Mode Feedback Amplifiers

Typical Performance Curves

(PDIP and SOIC Packages)

Response (Gain)

Non-Inverting Frequency

2180– 5

(PDIP and SOIC Packages)

Response (Phase)

Non-Inverting Frequency

2180– 6

(PDIP and SOIC Packages)

for Various RFand RG

Frequency Response

2180– 7

(PDIP and SOIC Packages)

Response (Gain)

Inverting Frequency

2180– 8

(PDIP and SOIC Packages)

Response (Phase)

Inverting Frequency

2180– 9

(PDIP and SOIC Packages)

for Various RLand RL

Frequency Response

2180– 10

Frequency

Transimpedance (ROL)vs

2180– 11

vs Frequency

PSRR and CMRR

2180– 12

Various CINb

Frequency Response for

2180– 13

EL2180C/EL2280C/EL2480C

250 MHz/3 mA Current Mode Feedback Amplifiers

Typical Performance Curves

Ð Contd.

Noise vs Frequency

Voltage and Current

2180– 14

Distortion vs Frequency

2nd and 3rd Harmonic

2180– 15

Swing vs Frequency

Output Voltage

2180– 16

Various Non-Inverting Gains

vs Supply Voltage for

b3 dB Bandwidth and Peaking

2180– 17

Various Inverting Gains

vs Supply Voltage for

b3 dB Bandwidth and Peaking

2180– 18

vs Supply Voltage

Output Voltage Swing

2180– 19

Supply Voltage

Supply Current vs

2180– 20

vs Supply Voltage

Common-Mode Input Range

2180– 21

Supply Voltage

Slew Rate vs

2180– 22

EL2180C/EL2280C/EL2480C

250 MHz/3 mA Current Mode Feedback Amplifiers

Typical Performance Curves

Ð Contd.

vs Die Temperature

Input Bias Current

2180– 23

vs Die Temperature

Short-Circuit Current

2180– 24

vs Die Temperature

Transimpedance (ROL)

2180– 25

Various Non-Inverting Gains

vs Die Temperature for

b3 dB Bandwidth and Peaking

2180– 26

Various Inverting Gains

Die Temperature for

b3 dB Bandwidth vs

2180– 27

vs Die Temperature

Input Offset Voltage

2180– 28

Die Temperature

Supply Current vs

2180– 29

vs Die Temperature

Input Voltage Range

2180– 30

Die Temperature

Slew Rate vs

2180– 31

EL2180C/EL2280C/EL2480C

250 MHz/3 mA Current Mode Feedback Amplifiers

Typical Performance Curves

Ð Contd.

Voltage at 3.58 MHz

Phase vs DC Input

Differential Gain and

2180– 32

Voltage at 3.58 MHz

Phase vs DC Input

Differential Gain and

2180– 33

Settling Accuracy

Settling Time vs

2180– 34

Small-Signal Step Response

2180– 35

Large-Signal Step Response

2180– 36

vs Ambient Temperature

Maximum Power Dissipation

5-Lead Plastic SOT23

2180– 47

vs Ambient Temperature

Maximum Power Dissipation

8-Pin Plastic DIP

2180– 37

vs Ambient Temperature

Maximum Power Dissipation

8-Lead SO

2180– 38

EL2180C/EL2280C/EL2480C

250 MHz/3 mA Current Mode Feedback Amplifiers

Typical Performance Curves

Ð Contd.

vs Ambient Temperature

Maximum Power Dissipation

14-Pin Plastic DIP

2180– 39

vs Ambient Temperature

Maximum Power Dissipation

14-Lead SO

2180– 40

vs Frequency

Channel Separation

2180– 41

(SOT23-5 Package)

Response (Gain)

Non-Inverting Frequency

2180– 48

(SOT23-5 Package)

Response (Phase)

Non-Inverting Frequency

2180– 49

(SOT23-5 Package)

Various RFand RG

Frequency Response for

2180– 50

(SOT23-5 Package)

Response (Gain)

Inverting Frequency

2180– 51

(SOT23-5 Package)

Response (Phase)

Inverting Frequency

2180– 52

EL2180C/EL2280C/EL2480C

250 MHz/3 mA Current Mode Feedback Amplifiers

Applications Information

Product Description

The EL2180C/EL2280C/EL2480C are current-

feedback operational amplifiers that offer a wide

b3 dB bandwidth of 250 MHz and a low supply

current of 3 mA per amplifier. All of these prod-

ucts also feature high output current drive. The

EL2180C can output 100 mA, while the EL2280C

and the EL2480C can output 55 mA per amplifi-

er. The EL2180C/EL2280C/EL2480C work with

supply voltages ranging from a single 3V to

g6V, and they are also capable of swinging to

within 1V of either supply on the input and the

output. Because of their current-feedback topolo-

gy, the EL2180C/EL2280C/EL2480C do not

have the normal gain-bandwidth product associ-

ated with voltage-feedback operational amplifi-

ers. This allows their b3 dB bandwidth to re-

main relatively constant as closed-loop gain is in-

creased. This combination of high bandwidth and

low power, together with aggressive pricing make

the EL2180C/EL2280C/EL2480C the ideal

choice for many low-power/high-bandwidth ap-

plications such as portable computing, HDSL,

and video processing.

For applications where board space is extremely

critical, the EL2180C is available in the tiny

5-lead SOT23 package, which has a footprint

28% the size of an 8-lead SOIC. The EL2180C/

EL2280C/EL2480C are each also available in in-

dustry standard pinouts in PDIP and SOIC pack-

ages.

For Single, Dual and Triple applications with

disable, consider the EL2186C (8-Pin Single),

EL2286C (14-Pin Dual) and EL2386C (16-Pin

Triple). If lower power is required, refer to the

EL2170C/EL2176C family which provides Sin-

gles, Duals, and Quads with 70 MHz of band-

width while consuming 1 mA of supply current

per amplifier.

Power Supply Bypassing and Printed

Circuit Board Layout

As with any high-frequency device, good printed

circuit board layout is necessary for optimum

performance. Ground plane construction is high-

ly recommended. Lead lengths should be as short

as possible. The power supply pins must be well

bypassed to reduce the risk of oscillation. The

combination of a 4.7 mF tantalum capacitor in

parallel with a 0.1 mF capacitor has been shown

to work well when placed at each supply pin.

For good AC performance, parasitic capacitance

should be kept to a minimum especially at the

inverting input (see the Capacitance at the In-

verting Input section). Ground plane construc-

tion should be used, but it should be removed

from the area near the inverting input to mini-

mize any stray capacitance at that node. Carbon

or Metal-Film resistors are acceptable with the

Metal-Film resistors giving slightly less peaking

and bandwidth because of their additional series

inductance. Use of sockets, particularly for the

SO package, should be avoided if possible. Sock-

ets add parasitic inductance and capacitance

which will result in some additional peaking and

overshoot.

Capacitance at the Inverting Input

Any manufacturer’s high-speed voltage- or cur-

rent-feedback amplifier can be affected by stray

capacitance at the inverting input. For inverting

gains this parasitic capacitance has little effect

because the inverting input is a virtual ground,

but for non-inverting gains this capacitance (in

conjunction with the feedback and gain resistors)

creates a pole in the feedback path of the amplifi-

er. This pole, if low enough in frequency, has the

same destabilizing effect as a zero in the forward

open-loop response. The use of large value feed-

back and gain resistors further exacerbates the

problem by further lowering the pole frequency.

EL2180C/EL2280C/EL2480C

250 MHz/3 mA Current Mode Feedback Amplifiers

Applications Information

Ð Contd.

The experienced user with a large amount of PC

board layout experience may find in rare cases

that the EL2180C/EL2280C/EL2480C have less

bandwidth than expected.

The reduction of feedback resistor values (or the

addition of a very small amount of external ca-

pacitance at the inverting input, e.g. 0.5 pF) will

increase bandwidth as desired. Please see the

curves for Frequency Response for Various RF

and RG, and Frequency Response for Various

CINb.

Feedback Resistor Values

The EL2180C/EL2280C/EL2480C have been de-

signed and specified at gains of a1 and a2 with

RFe750Xin PDIP and SOIC packages and RF

e560Xin SOT23-5 package. These values of

feedback resistors give 250 MHz of b3 dB band-

width at AVea

1 with about 2.5 dB of peaking,

and 180 MHz of b3 dB bandwidth at AVea

with about 0.1 dB of peaking. The SOT23-5 pack-

age is characterized with a smaller value of feed-

back resistor, for a given bandwidth, to compen-

sate for lower parasitics within both the package

itself and the printed circuit board where it will

be placed. Since the EL2180C/EL2280C/

EL2480C are current-feedback amplifiers, it is

also possible to change the value of RFto get

more bandwidth. As seen in the curve of Fre-

quency Response For Various RFand RG, band-

width and peaking can be easily modified by

varying the value of the feedback resistor.

Because the EL2180C/EL2280C/EL2480C are

current-feedback amplifiers, their gain-band-

width product is not a constant for different

closed-loop gains. This feature actually allows

the EL2180C/EL2280C/EL2480C to maintain

about the same b3 dB bandwidth, regardless of

closed-loop gain. However, as closed-loop gain is

increased, bandwidth decreases slightly while sta-

bility increases. Since the loop stability is im-

proving with higher closed-loop gains, it becomes

possible to reduce the value of RFbelow the spec-

ified 560Xand 750Xand still retain stability, re-

sulting in only a slight loss of bandwidth with

increased closed-loop gain.

Supply Voltage Range and Single-

Supply Operation

The EL2180C/EL2280C/EL2480C have been de-

signed to operate with supply voltages having a

span of greater than 3V, and less than 12V. In

practical terms, this means that the EL2180C/

EL2280C/EL2480C will operate on dual supplies

ranging from g1.5V to g6V. With a single-sup-

ply, the EL2180C/EL2280C/EL2480C will oper-

ate from a3V to a12V.

As supply voltages continue to decrease, it be-

comes necessary to provide input and output

voltage ranges that can get as close as possible to

the supply voltages. The EL2180C/EL2280C/

EL2480C have an input voltage range that ex-

tends to within 1V of either supply. So, for exam-

ple, on a single a5V supply, the EL2180C/

EL2280C/EL2480C have an input range which

spans from 1V to 4V. The output range of the

EL2180C/EL2280C/EL2480C is also quite large,

extending to within 1V of the supply rail. On a

g5V supply, the output is therefore capable of

swinging from b4V to a4V. Single-supply out-

put range is even larger because of the increased

negative swing due to the external pull-down re-

sistor to ground. On a single a5V supply, output

voltage range is about 0.3V to 4V.

Video Performance

For good video performance, an amplifier is re-

quired to maintain the same output impedance

and the same frequency response as DC levels are

changed at the output. This is especially difficult

when driving a standard video load of 150X, be-

cause of the change in output current with DC

level. Until the EL2180C/EL2280C/EL2480C,

good Differential Gain could only be achieved by

running high idle currents through the output

transistors (to reduce variations in output imped-

ance). These currents were typically comparable

to the entire 3 mA supply current of each

EL2180C/EL2280C/EL2480C amplifier! Special

circuitry has been incorporated in the EL2180C/

EL2280C/EL2480C to reduce the variation of

output impedance with current output. This re-

sults in dG and dP specifications of 0.05% and

0.05§while driving 150Xat a gain of a2.

EL2180C/EL2280C/EL2480C

250 MHz/3 mA Current Mode Feedback Amplifiers

Applications Information

Ð Contd.

Video Performance has also been measured with

a 500Xload at a gain of a1. Under these condi-

tions, the EL2180C/EL2280C/EL2480C have dG

and dP specifications of 0.01% and 0.01§respec-

tively while driving 500Xat AVea

Output Drive Capability

In spite of its low 3 mA of supply current, the

EL2180C is capable of providing a minimum of

g80 mA of output current. Similarly, each am-

plifier of the EL2280C and the EL2480C is capa-

ble of providing a minimum of g50 mA. These

output drive levels are unprecedented in amplifi-

ers running at these supply currents. With a min-

imum g80 mA of output drive, the EL2180C is

capable of driving 50Xloads to g4V, making it

an excellent choice for driving isolation trans-

formers in telecommunications applications.

Similarly, the g50 mA minimum output drive of

each EL2280C and EL2480C amplifier allows

swings of g2.5V into 50Xloads.

Driving Cables and Capacitive Loads

When used as a cable driver, double termination

is always recommended for reflection-free per-

formance. For those applications, the back-termi-

nation series resistor will decouple the EL2180C/

EL2280C/EL2480C from the cable and allow ex-

tensive capacitive drive. However, other applica-

tions may have high capacitive loads without a

back-termination resistor. In these applications, a

small series resistor (usually between 5Xand

50X) can be placed in series with the output to

eliminate most peaking. The gain resistor (RG)

can then be chosen to make up for any gain loss

which may be created by this additional resistor

at the output. In many cases it is also possible to

simply increase the value of the feedback resistor

(RF) to reduce the peaking.

Current Limiting

The EL2180C/EL2280C/EL2480C have no inter-

nal current-limiting circuitry. If any output is

shorted, it is possible to exceed the Absolute

Maximum Ratings for output current or power

dissipation, potentially resulting in the destruc-

tion of the device.

Power Dissipation

With the high output drive capability of the

EL2180C/EL2280C/EL2480C, it is possible to

exceed the 150§C Absolute Maximum junction

temperature under certain very high load current

conditions. Generally speaking, when RLfalls be-

low about 25X, it is important to calculate the

maximum junction temperature (TJmax) for the

application to determine if power-supply volt-

ages, load conditions, or package type need to be

modified for the EL2180C/EL2280C/EL2480C to

remain in the safe operating area. These parame-

ters are calculated as follows:

TJMAX eTMAX a(iJA *n*PDMAX)[1]

where:

TMAX eMaximum Ambient Temperature

iJA eThermal Resistance of the Package

neNumber of Amplifiers in the Pack-

age

PDMAX eMaximum Power Dissipation of

Each Amplifier in the Package.

PDMAX for each amplifier can be calculated as

follows:

PDMAX e(2 *VS*ISMAX)a

(VSbVOUTMAX)*(VOUTMAX/RL)) [2]

where:

VSeSupply Voltage

ISMAX eMaximum Supply Current of 1

Amplifier

VOUTMAX eMax. Output Voltage of the

Application

RLeLoad Resistance

EL2180C/EL2280C/EL2480C

250 MHz/3 mA Current Mode Feedback Amplifiers

Typical Application Circuits

Inverting 200 mA Output Current Distribution Amplifier

2180– 42

Fast-Settling Precision Amplifier

2180– 43

EL2180C/EL2280C/EL2480C

250 MHz/3 mA Current Mode Feedback Amplifiers

Typical Application Circuits

Ð Contd.

Differential Line-Driver/Receiver

2180– 44

EL2180C/EL2280C/EL2480C

250 MHz/3 mA Current Mode Feedback Amplifiers

EL2180C/EL2280C/EL2480C Macromodel

*EL2180 Macromodel *Transimpedance Stage

*Revision A, March 1995 *

*AC characteristics used: Rf eRg e750 ohms g1 0 18 17 0 1.0

*Connections: ainput rol 18 0 450K

binput cdp 18 0 0.675pF

Vsupply *

lll

Vsupply *Output Stage

llll

output *

lllll

q141819qp

.subckt EL2180/el 32746 q271820qn

*q371921qn

*Input Stage q4 4 20 22 qp

*r7 21 6 4

e1100301.0 r82264

vis 10 9 0V ios1 7 19 1mA

h2 9 12 vxx 1.0 ios2 20 4 1mA

r1211400 *

l1 11 12 25nH *Supply Current

iinp 3 0 1.5uA *

iinm 2 0 3uA ips 7 4 0.2mA

r12 3 0 2Meg *

**Error Terms

*Slew Rate Limiting *

*ivos 0 23 0.2mA

h1 13 0 vis 600 vxx 23 0 0V

r213141K e4240301.0

d1 14 0 dclamp e5 250701.0

d2 0 14 dclamp e6 26040b

1.0

*r9 24 23 316

*High Frequency Pole r10 25 23 3.2K

*r11 26 23 3.2K

e2 30 0 14 0 0.00166666666 *

l3 30 17 150nH *Models

c5 17 0 0.8pF *

r5 17 0 165 .model qn npn(ise5e-15 bfe200 tfe0.01nS)

*.model qp pnp(ise5e-15 bfe200 tfe0.01nS)

.model dclamp d(ise1e-30 ibve0.266

abve0.71v ne4)

.ends

TDis5.2in

EL2180C/EL2280C/EL2480CAugust 1996, Rev. D

EL2180C/EL2280C/EL2480C

250 MHz/3 mA Current Mode Feedback Amplifiers

EL2180C/EL2280C/EL2480C Macromodel

Ð Contd.

2180– 45

General Disclaimer

Specifications contained in this data sheet are in effect as of the publication date shown. Elantec, Inc. reserves the right to make changes

in the circuitry or specifications contained herein at any time without notice. Elantec, Inc. assumes no responsibility for the use of any

circuits described herein and makes no representations that they are free from patent infringement.

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