ELANT EL2082CN, EL2082CS Datasheet

EL2082C

Current-Mode Multiplier

EL2082C January 1996, Rev D

Features

# Flexible inputs and outputs, all

ground referred

# 150 MHz large and small-signal

bandwidth

# 46 dB of calibrated gain control

range

# 70 dB isolation in disable mode

@

10 MHz

# 0.15% diff gain and 0.05

§

diff phase performance at NTSC using application circuit

# Operates on

g

5V tog15V power

supplies

# Outputs may be paralleled to

function as a multiplexer

Applications

# Level adjust for video signals # Video faders and mixers # Signal routing multiplexers # Variable active filters # Video monitor contrast control # AGC # Receiver IF gain control # Modulation/demodulation # General ‘‘cold’’ front-panel

control of AC signals

General Description

The EL2082 is a general purpose variable gain control building block, built using an advanced proprietary complementary bipolar process. It is a two-quandrant multiplier, so that zero or negative control voltages do not allow signal feedthrough and very high attenuation is possible. The EL2082 works in current mode rather than voltage mode, so that the input impedance is low and the output impedance is high. This allows very wide bandwidth for both large and small signals.

The I fore, the V

pin replicates the voltage present on the VINpin; there-

IN

pin can be used to reject common-mode noise and

IN

establish an input ground reference. The gain control input is calibrated to 1 mA/mA signal gain for 1V of control voltage. The disable pin (E

) is TTL-compatible, and the output current

can comply with a wide range of output voltages.

Because current signals rather than voltages are employed, multiple inputs can be summed and many outputs wire-or’ed or mixed.

The EL2082 operates from a wide range of supplies and is available in standard 8-pin plastic DIP or 8-lead SO.

Connection Diagram

8-Pin DIP/SO

Ordering Information

Part No. Temp. Range Package Outline

EL2082CN 0§Ctoa75§C 8-Pin P-DIP MDP0031

EL2082CS 0§Ctoa75§C 8-Pin SO MDP0027

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.

©

1992 Elantec, Inc.

Ý

2082– 1

Top View

EL2082C

Current-Mode Multiplier

Absolute Maximum Ratings

a

V

S

V

IN,IOUT

VE,V I

IN

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

Voltage between V Voltage Input Voltage

GAIN

Input Current

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

S

MIN

b

and V

S

A

per QA test plan QCX0002.

e

(T

25§C)

A

a

33V

g

V

b

e

A

S

1toa7V

g

5mA

25§C and QA sample tested at T

e

25§C for information purposes only.

P

D

T

A

T

J

T

ST

Maximum Power Dissipation See Curves Operating Temperature Range 0§Ctoa75§C Operating Junction Temperature 150§C Storage Temperature

e

25§C,

A

b

65§Ctoa150§C

e

T

TA.

J

C

DC Electrical Characteristics

e

g

(V

S

Parameter Description Temp Min Typ Max Test Units

V

IO

I

OO

R

INI

V

CMRR

I

CMRR

V

PSRR

I

PSRR

I

BVIN

R

INV

Nlini Signal Nonlinearity; I

R

OUT

15V, V

e

G

1V, V

e

0.8V, V

E

OUT

e

0, V

e

0, I

IN

Input Offset Voltage Full

Output Offset Current Full

IINInput Impedance; I

e

0, 0.35 mA Full 75 95 115 II X

IN

Voltage Common-Mode Rejection Ratio

eb

V

IN

10V,a10V

Offset Current Common-Mode Rejection

IN

eb

10V,a10V

Ratio, V

Offset Voltage Power Supply Rejection

e

S

g

5V tog15V

Ratio, V

Offset Current Power Supply Rejection

e

S

g

5V tog15V

Ratio, V

VINBias Current Full

IN

OUT

eb

10V,a10V Full 0.5 1.0 II MX

IN

eb

0.7 mA,

eb

10V,a10V Full 0.25 0.5 II MX

VINInput Impedance; V

b

0.35 mA, 0 mA,a0.35 mA,a0.7 mA

Output Impedance V

0)

Level

b

20 20 II mV

b

100 100 II mA

Full 45 55 II dB

Full 0.5 5 II mA/V

Full 60 80 II dB

Full 1 10 II mA/V

b

10 10 II mA

Full 0.10 0.4 II %

TDis 3.0in

2

EL2082C

Current-Mode Multiplier

DC Electrical Characteristics

e

g

(V

S

15V, V

e

G

1V, V

e

0.8V, V

E

OUT

e

0, V

Ð Contd.

e

IN

0, I

e

0)

IN

Parameter Description Temp Min Typ Max Test Units

Level

V

A

OUT

IOG

I

Output Swing; V

e

4.0K

R

L

VOS, Gain Control, Extrapolated from V

GAIN

Current Gain, I

e

GAIN

e

0.1V, 1V

g

350 mA Full 0.9 1.0 1.1 II mA/mA

IN

Nling Nonlinearity of Gain Control,

e

I

SO

V

I

LH

I

LL

I

ODIS

I

S

INH

INL

V

Input Isolation with V

E Logic High Level Full 2.0 II V

E Logic Low Level Full 0.8 II V

Input Current of E,V

I

Supply Current Full 13 16 II mA

0.1V, 0.5V, 1V

GAIN

e

E

e

E

, Disabled Ee2.0V Full

OUT

g

2V, I

2 mA,

IN

eb

0.1V Full

5V Full

0 Full

Full

b

11

b

15 15 II mV

a

11 II V

Full 2 5 II %

b

80

96 II dB

50 50 II mA

g

10 II mA

AC Electrical Characteristics

e

(R

L

Parameter Description Min Typ Max

BW1 Current Mode Bandwidth BW2 BWp Power, I

BWg Gain Control Bandwidth 20 V MHz

SRG Gain Control Slew Rate VGfrom 0.2V to 2V 12 V (mA/mA)/ms

T

REC

T

EN

T

DIS

D

G

D

P

25X,C

e

4 pF, C

L

IIN

e

2 pF, T

e

A

25§C, V

e

G

1V, V

e

g

15V)

S

Test

Level

b

3 dB 150 V MHz

g

0.1 dB 30 V MHz

e

1 mA p-p 150 V MHz

IN

Recovery Time from V

k

0 250 V ns

G

Enable Time from E Pin 200 V ns

Disable Time from E Pin 30 V ns

Differential Gain, NTSC with I

eb

IN

Differential Phase, NTSC with I

eb

IN

0.35 mA toa0.35 mA

0.25 V %

0.05 V Degree

Units

TDis 2.8inTDis 2.4in

3

EL2082C

Current-Mode Multiplier

Typical Performance Curves

Current Gain vs Frequency for Different Gains

Current Gain Flatness Voltage Input Mode

Current Gain vs Frequency

Frequency Response in

Harmonic Distortion vs Input Amplitude

Output Current Noise vs Frequency

2082– 2

4

EL2082C

Current-Mode Multiplier

Typical Performance Curves

Differential Gain Error vs DC Offset Current

Gain Pin Transient Response

Ð Contd.

Differential Phase Error vs DC Offset Current

Gain Control Recovery From

eb

Vg

0.1V

2082– 3

Gain Control Pin Frequency Response

I

2082– 4

OUT

vs I

2082– 5

Normalized Gain Error

IN

5

vs V

GAIN

Voltage

2082– 6