ELANT EL2070CS, EL2070CN Datasheet

EL2070C

200MHz Current Feedback Amplifier

EL2070C

Features

• 200MHz -3dB bandwidth, AV=2

• Disable/enable

• 12ns settling to 0.05%

• VS = ±5V @ 15mA

• Low distortion: HD2, HD3 @ -----

-60dBc at 20MHz

• Differential gain 0.02% at NTSC,
PAL

• Differential phase 0.01° at NTSC,
PAL

• Overload/short-circuit protected

• ±1 to ±8 closed-loop gain range

• Low cost

Applications

• Video gain block

• Video distribution

• HDTV amplifier

• Analog multiplexing (using
disable)

• Power-down mode (using disable)

• High-speed A/D conversion

• D/A I-V conversion

• Photodiode, CCD preamps

• IF processors

• High-speed communications

General Description

The EL2070C is a wide bandwidth, fast settling monolithic amplifier
incorporating a disable/enable feature. Built using an advanced com­plementary bipolar process, this amplifier uses current-mode feedback
to achieve more bandwidth at a given gain than conventional opera­tional amplifiers. Designed for closed-loop gains of ±1 to ±8, the
EL2070C has a 200MHz -3dB bandwidth (AV = +2), and 12ns settling
to 0.05% while consuming only 15mA of supply current. Furthermore,
the fast disable/enable times of 200ns/100ns allow rapid analog
multiplexing.

The EL2070C is an obvious high-performance solution for video dis­tribution and line-driving applications, especially when its disable
feature can be used for fast analog multiplexing. Furthermore, the low
15mA supply current, and the very low 5mA of supply current when
disabled suggest use in systems where power is critical. With differen­tial gain/phase of 0.02%/0.01°, guaranteed video specifications, and a
minimum 50mA output drive, performance in these areas is assured.

The EL2070C's settling to 0.05% in 12ns, low distortion, and ability to
drive capacitive loads make it an ideal flash A/D driver. The wide
200MHz bandwidth and extremely linear phase allow unmatched sig­nal fidelity. D/A systems can also benefit from the EL2070C,
especially if linearity and drive levels are important.

Ordering Information

Part No. Temp. Range Package Outline #

EL2070CN -40°C to +85°C 8-Pin P-DIP MDP0031

EL2070CS -40°C to +85°C 8-Lead 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.

© 2001 Elantec Semiconductor, Inc.

Connection Diagrams

DIP and SO Package - Top VIew

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

September 26, 2001

EL2070C

200MHz Current Feedback Amplifier

EL2070C

Absolute Maximum Ratings (T

Supply Voltage (VS) ±7V

Output Current 70mA

(Output is short-circuit protected to ground, however,
maximum reliability is obtained if I

Common-Mode Input Voltage ±V

Differential Input Voltage 5V

Disable Input Voltage +VS, -1V
Thermal Resistance θ

does not exceed 70mA)

OUT

= 25°C)

A

= 95°C/W P-DIP

JA

θ

JA

Applied Output Voltage (Disabled) ±V

Power Dissipation See Curves

Operating Temperature

S

EL2070C -40C to +85C

Lead Temperature (Soldering, 5 Seconds) 300°C

Junction Temperature 175°C

Storage Temperature-60°C to +150°C

= 175°C/W SO-8

Important Note:

All parameters having Min/Max specifications are guaranteed. Typ values are for information purposes only. Unless otherwise noted, all tests are at the
specified temperature and are pulsed tests, therefore: TJ = TC = TA.

Open Loop DC Electrical Characteristics

VS = ±5V, R

V

d(VOS)/dT Average Offset

+I

d(+IIN)/dT Average +Input

-I

d(-IIN)/dT Average -Input

PSRR Power Supply

CMRR Common-Mode

I

S

IS

+R

C

R

R

C

CMIR Common-Mode

I

OUT

V

V

= 100Ω unless otherwise specified

L

Parameter Description Test Conditions Temp Min Typ Max Unit

OS

Input Offset Voltage 25°C 2 5.5 mV

T

MIN

T

[1]

MAX

All 10.0 40.0 µV/°C

8.2 mV

9.0 mV

Voltage Drift

IN

+Input Current 25°C, T

[1]

T

All 50.0 200.0 nA/°C

MAX

MIN

10 25.0 µA

36.0 µA

Current Drift

IN

-Input Current 25.0°C 10 30 µA

T

, T

MIN

[1]

MAX

All 50.0 200.0 nA/°C

46 µA

Current Drift

All 45.0 50.0 dB

Rejection Ratio

All 40.0 50.0 dB

Rejection Ratio

Supply Current—Quiescent No Load All 16.0 20.0 mA

OFF

IN

IN

OUT

D Output Resistance (DC) Disabled All 100.0 200.0 kΩ

OUT

D Output Capacitance (DC) Disabled All 0.5 2.0 pF

OUT

Supply Current—Disabled

+Input Resistance 25°C, T

Input Capacitance All 0.5 2.0 pF
Output Impedance (DC) All 0.1 0.2 Ω

Input Range

Output Current 25°C, T

OUT

L Output Voltage Swing 100Ω 25°C 3.0 3.4 V

OUT

Output Voltage Swing No Load All 3.3 3.5 V

[2]

[3]

All 4.0 7.0 mA

100.0 200.0 kΩ

50.0 kΩ

2.0 2.1 V

1.2 V

50.0 70.0 mA

35.0 mA

T

25°C, T

T

T

MAX

MIN

MAX

MIN

MAX

MIN

S

2

EL2070C

200MHz Current Feedback Amplifier

Open Loop DC Electrical Characteristics (Continued)

VS = ±5V, R

-ICMR Input Current Common

+IPSR +Input Current Power

-IPSR -Input Current Power

R

OL

I

LOGIC

V

V

I

DIS

I

EN

1. Measured from T

2. Supply current when disabled is measured at the negative supply.

3. Common-mode input range for rated performance.

= 100Ω unless otherwise specified

L

Parameter Description Test Conditions Temp Min Typ Max Unit

25°C 8.0 33.0 µA/V

Mode Rejection

25°C 1.0 3.6 µA/V

Supply Rejection

25°C 20 24 µA/V

Supply Rejection

Transimpedance 25°C 30.0 125.0 V/mA

T

T

MIN

MAX

80.0 V/mA

140.0 V/mA

Pin 8 Current @ 0V All 0.8 1.2 mA

DIS

Maximum Pin 8

All 0.5 V

V to Disable

EN

Minimum Pin 8

All 3.5 V

V to Enable

Minimum Pin 8

All 350.0 µA

I to Disable

Maximum Pin 8

All 60.0 µA

I to Enable

to T

MAX

.

MIN

EL2070C

Closed-Loop AC Electrical Characteristics

VS = ±5V, R

Parameter Description Test Conditions Temp Min Typ Max Unit

FREQUENCY RESPONSE

SSBW -3dB Bandwidth

LSBW -3dB Bandwidth

GAIN FLATNESS

GFPL Peaking

GFPH Peaking

GFR Rolloff

LPD Linear Phase Deviation

TIME-DOMAIN RESPONSE

tr1, t

tr2, t

= 250Ω, A

F

= +2, R

= 100Ω unless otherwise specified

V

L

25°C 150.0 200.0 MHz

(V

< 0.5VPP)

OUT

T

T

MIN

MAX

150.0 MHz

120.0 MHz

AV = +5 All 35.0 50.0 MHz

(V

< 5.0VPP)

OUT

<40MHz 25°C 0.0 0.3 dB

V

< 0.5V

OUT

PP

T

, T

MIN

MAX

>40MHz 25°C 0.0 0.5 dB

V

< 0.5V

OUT

PP

T

, T

MIN

MAX

<75MHz 25°C 0.6 1.0 dB

V

< 0.5V

OUT

V

OUT

Rise Time, Fall Time 0.5V Step All 1.6 2.4 ns

f1

Rise Time, Fall Time 5.0V Step All 6.5 10.0 ns

f2

< 0.5V

PP

<75MHz 25°C, T

PP

T

T

T

MIN

MAX

MAX

MIN

0.2 1.0 °

3

0.4 dB

0.7 dB

1.0 dB

1.3 dB

1.2 °

EL2070C

200MHz Current Feedback Amplifier

EL2070C

Closed-Loop AC Electrical Characteristics

VS = ±5V, R

Parameter Description Test Conditions Temp Min Typ Max Unit

t

s1

t

s2

OS Overshoot 0.5V Step 25°C, T

SR Slew Rate AV = +2 All 430.0 700.0 V/µs

DISTORTION

HD2 2nd Harmonic Distortion

HD3 3rd Harmonic Distortion

EQUIVALENT INPUT NOISE

NF Noise Floor

INV Integrated Noise

DISABLE/ENABLE PERFORMANCE

T

T

OFFIso Off Isolation 10MHz All 55.0 59.0 dB

VIDEO PERFORMANCE

d

G

d

P

d

G

d

P

VBW -0.1dB Bandwidth

= 250Ω, A

F

= +2, R

= 100Ω unless otherwise specified

V

L

Settling Time to 0.1% 2.0V Step All 10.0 13.0 ns

Settling Time to 0.05% 2.0V Step All 12.0 15.0 ns

AV = - 2 All 1600.0 V/µs

2V

PP

at 20MHz

2V

PP

at 20MHz

[1]

>100kHz

[1]

100kHz to 200MHz

OFF

ON

Disable Time to >50dB 10MHz All 1000.0 IV ns

Enable Time All 200.0 ns

Differential Gain

Differential Phase

Differential Gain

Differential Phase

[2]

[2]

[2]

[2]

[2]

NTSC/PAL 25°C 0.02 0.08 % pp

NTSC/PAL 25°C 0.01 0.08 ° pp

30MHz 25°C 0.05 0.18 % pp

30MHz 25°C 0.05 0.18 ° pp

1. Noise Tests are performed from 5MHz to 200MHz.

2. Differential gain/phase tests are with R

= 100Ω. For other values of R

L

, see curves.

L

MAX

T

MIN

0.0 10.0 %

15.0 %

25°C -60.0 -45.0 dBc

T

T

MIN

MAX

-40.0 dBc

-45.0 dBc

25°C -60.0 -50.0 dBc

T

MIN

, T

MAX

-50.0 dBc

25°C -157.0 -154.0 dBm (1Hz)

T

T

MIN

MAX

-154.0 dBm (1Hz)

-153.0IV dBm (1Hz)

25°C 40.0 57.0 µV

T

T

MIN

MAX

57.0 µV

63.0 µV

25°C 30.0 60.0 MHz

4

Typical Performance Curves

EL2070C

EL2070C

200MHz Current Feedback Amplifier

Non-Inverting
Frequency Response

Open-Loop Transimpedance
Gain and Phase

Equivalent Input Noise Power-Supply

Inverting
Frequency Response

2nd and 3rd
Harmonic Distortion

Rejection Ratio

Frequency Response for
Various RLs

2-Tone 3rd Order
Intermodulation Intercept

Common-Mode
Rejection Ratio

5