ELANT EL400CS, EL400CN Datasheet

EL400C

200MHz Current Feedback Amplifier

EL400C

Features

• 200MHz -3dB bandwidth, AV=2

• 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

• Direct replacement for CLC400

Applications

• Video gain block

• Video distribution

• HDTV amplifier

• High-speed A/D conversion

• D/A I-V conversion

• Photodiode, CCD preamps

• IF processors

• High-speed communications

General Description

The EL400C is a wide bandwidth, fast settling monolithic amplifier
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 closed­loop gains of ±1 to ±8, the EL400C has a 200MHz -3dB bandwidth
(AV = +2), and 12ns settling to 0.05% while consuming only 15mA of
supply current.

The EL400C is an obvious high-performance solution for video distri­bution and line-driving applications. With low 15mA supply current,
differential gain/phase of 0.02%/0.01°, and a minimum 50mA output
drive, performance in these areas is assured.

The EL400'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 EL400C, especially
if linearity and drive levels are important.

Ordering Information

Part No. Temp. Range Package Outline #

EL400CN -40°C to +85°C 8-Pin P-DIP MDP0031

EL400CS -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

EL400C

200MHz Current Feedback Amplifier

EL400C

Absolute Maximum Ratings (T

Supply Voltage (VS) ±7V

Output Current

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

does not exceed 70mA.

OUT

Common-Mode Input Voltage ±V

Differential Input Voltage 5V

Power Dissipation See Curves

= 25°C)

A

Operating Temperature -40°C to +85°C

Lead Temperature (Soldering, 5 Seconds) 300°C

Junction Temperature 175°C

Storage Temperature -60°C to +150°C

S

Thermal Resistance:

θ

= 95°C/W P-DIP

JA

θ

= 175°C/W SO-8

JA

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

Parameter Description Test Conditions Temp Min Typ Max Unit

V

d(VOS)/dT Average Offset Voltage Drift

+I

d(+IIN)/dT Average +Input Current Drift

-I

d(-IIN)/dT Average -Input Current Drift

PSRR Power Supply Rejection Ratio All 40.0 50.0 dB

CMRR Common-Mode Rejection Ratio All 40.0 50.0 dB

I

S

+R

C

R

CMIR Common-Mode Input Range

I

OUT

V

V

R

= 100Ω unless otherwise specified

L

OS

IN

IN

Input Offset Voltage 25°C 2.0 5.5 mV

[1]

+Input Current 25°C, T

-Input Current 25°C 10.0 25.0 µA

Supply Current—Quiescent No Load All 15.0 23.0 mA

IN

IN

OUT

+Input Resistance 25°C, T

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

[2]

Output Current 25°C, T

OUT

OUTL

OL

1. Measured from T

Output Voltage Swing No Load All 3.2 3.5 V
Output Voltage Swing 100Ω 25°C 3.0 3.4 V

Transimpedance 25°C 30.0 125.0 V/mA

to T

MAX

.

MIN

2. Common-Mode Input Range for Rated Performance.

T

T

MIN

MAX

8.7 mV

9.5 mV

All 10.0 40.0 µV/°C

MAX

T

[1]

[1]

MIN

All 50.0 200.0 nA/°C

T

MIN

T

MAX

All 100.0 200.0 nA/°C

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

T

T

MAX

MAX

MIN

MAX

MIN

MAX

MIN

MIN

10.0 25.0 µA

41.0 µA

41.0 µA

35.0 µA

80.0 V/mA

140.0 V/mA

2

200MHz Current Feedback Amplifier

Closed-Loop AC Electrical Characteristics

VS = ±5V, R

Frequency
Response

Gain Flatness GFPL Peaking

Time-Domain
Response

Distortion HD2 2nd Harmonic Distortion at 20MHz 2V

Equivalent Input
Noise

Video
Performance

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

2. Differential Gain/Phase Tests are R

= 250Ω, A

F

= +2, R

= 100Ω unless otherwise specified

V

L

Parameter Description Test Conditions Temp Min Typ Max Unit

SSBW -3dB Bandwidth

(V

< 0.5VPP)

OUT

LSBW -3dB Bandwidth

(V

< 5.0VPP)

OUT

AV = +5 All 35.0 50.0 MHz

25°C 150.0 200.0 MHz

T

T

MIN

MAX

150.0 MHz

120.0 MHz

<40MHz 25°C 0.0 0.3 dB

V

< 0.5V

OUT

GFPH Peaking

V

OUT

GFR Rolloff

V

OUT

LPD Linear Phase Deviation

V

OUT

tr1, tf1Rise Time, Fall Time 0.5V Step 25°C, T

< 0.5V

< 0.5V

< 0.5V

PP

T

, T

MIN

MAX

>40MHz 25°C 0.0 0.5 dB

PP

T

, T

MIN

MAX

<75MHz 25°C 0.6 1.0 dB

PP

<75MHz 25°C, T

PP

T

T

T

T

MIN

MAX

MAX

MAX

MIN

MIN

0.2 1.0 °

1.6 2.4 ns

tr2, tf2Rise Time, Fall Time 5.0V Step All 6.5 10.0 ns

t

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

s1

t

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

s2

OS Overshoot 0.5V Step 25°C 0.0 10.0 %

T

, T

MIN

MAX

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

AV = - 2 All 1600.0 V/µs

25°C -60.0 -45.0 dBc

T

MIN

T

MAX

25°C -60.0 -50.0 dBc

T

, T

MIN

MAX

25°C -157.0 -154.0 dBm

HD3 3rd Harmonic Distortion at 20MHz 2V

NF Noise Floor

PP

PP

[1]

>100kHz

T

MIN

T

MAX

INV Integrated Noise

100kHz to 200MHz

d

Differential Gain

G

d

Differential Phase

P

d

Differential Gain

G

d

Differential Phase

P

VBW -0.1dB Bandwidth

= 100Ω. For other values of R

L

[2]

[2]

[2]

[2]

[2]

[1]

25°C 40.0 57.0 µV

T

MIN

T

MAX

NTSC/PAL 25°C 0.02 % pp

NTSC/PAL 25°C 0.01 ° pp

30MHz 25°C 0.05 % pp

30MHz 25°C 0.05 ° pp

25°C 60.0 MHz

, see curves.

L

EL400C

0.4 dB

0.7 dB

1.0 dB

1.3 dB

1.2 °

2.9 ns

15.0 %

-40.0 dBc

-45.0 dBc

-50.0 dBc

(1Hz)

-154.0 dBm

-153.0 dBm

57.0 µV

63.0 µV

(1Hz)

(1Hz)

EL400C

3

EL400C

200MHz Current Feedback Amplifier

EL400C

Typical Performance Curves

Non-Inverting
Frequency Response

Open-Loop Transimpedance
Gain and Phase

Equivalent Input Noise

Inverting Frequency Response Frequency Response for

2nd and 3rd
Harmonic Distortion

Power-Supply
Rejection Ratio

Various RLs

2-Tone 3rd Order
Intermodulation Intercept

Common-Mode
Rejection Ratio

Settling Time Long-Term Settling Time Settling Time vs Load Capacitance

4