NSC CLC418AJP, CLC418AJE Datasheet

Features

■

130MHz bandwidth (Av = +2)

■

96mA output current

■

1.5mA supply current

■

-85/-75dBc HD2/HD3

■

15ns settling to 0.2%

■

-74dBc input-referred crosstalk (5MHz)

■

Single version available (CLC408)

Applications

■

ADSL/HDSL driver

■

Coaxial cable driver

■

UTP differential line driver

■

Transformer/coil driver

■

High capacitive-load driver

■

Video line driver

■

Portable/battery-powered line driver

■

Differential A/D driver

V

o1

V

inv1

V

non-inv1

V

EE

V

o2

V

inv2

V

non-inv2

V

CC

+

-

1/2

CLC418

R

g2

+

V

o

-

-

+

R

t2

R

f2

R

f1

R

g1

1/2

CLC418

V

in

R

t1

R

m/2

R

m/2

R

L

Z

o

UTP

I

o

R

eq

I:n

V

d/2

-V

d/2

Typical Application Diagram

Differential Line Driver

with Load Impedance Conversion

Pinout

DIP & SOIC

General Description

The Comlinear CLC418 dual high-speed current-feedback
operational amplifier is designed to drive low-impedance and
high capacitance loads while maintaining high signal fidelity.
Operating on ±5V power supplies, each of the CLC418’s
amplifiers produces a continuous 96mA output current. Into a
back-terminated 50

Ω load, the devices produce -85/-64dBc

second/third harmonic distortion (Av = +2, Vo = 2Vpp, f = 1MHz).
The CLC418’s current-feedback architecture maintains consistent

performance over a wide range of gain and signal levels. DC gain
and bandwidth can be set independently. With proper resistor
selection, either maximally flat gain response or linear phase
response can be selected.

Requiring a mere 15mW quiescent power per amplifier, the
CLC418 offers superior performance-vs-power with a 130MHz
small-signal bandwidth, 350V/ms slew rate and quick 4.6ns
rise/fall times (2Vstep). The combination of low quiescent power,
high output current drive and high performance make the
CLC418 a great choice for many battery-powered personal
communication/computing systems.

Combining the CLC418’s two amplifiers (shown below) results in
a powerful differential line driver for driving video signals over
unshielded twisted-pair (UTP). The CLC418 can also be used for
driving differential-input step-up transformers for applications
such as Asynchronous Digital Subscriber Lines (ADSL) or High­Bit-Rate Digital Subscriber Lines (HDSL).

The CLC418’s amplifiers make excellent low-power high­resolution A-to-D converter drivers with their very fast 15ns set­tling time (to 0.2%) and ultra-low -85/-75dBc harmonic distortion
(Av = +2, Vo = 2Vpp, f = 1MHz, RL= 1kΩ).

Non-Inverting Frequency Response
(Av = +2V/V, RL = 100Ω)

Normalized Magnitude (1dB/div)

Frequency (Hz)

10M

1M 100M

Comlinear CLC418
Dual High-Speed, Low-Power Line Driver

N

August 1996

Comlinear CLC418

Dual High-Speed, Low-Power Line Driver

© 1996 National Semiconductor Corporation http://www.national.com

Printed in the U.S.A.

http://www.national.com 2

PARAMETERS CONDITIONS TYP MIN/MAX RATINGS UNITS NOTES
Ambient Temperature CLC418AJ +25˚C +25˚C 0 to 70˚C -40 to 85˚C

FREQUENCY DOMAIN RESPONSE

-3dB bandwidth V

o

< 1.0V

pp

130 80 80 75 MHz B

V

o

< 4.0V

pp

45 33 29 28 MHz

-

0.1dB bandwidth Vo< 1.0V

pp

30 25 20 20 MHz

gain flatness V

o

< 1.0V

pp

peaking DC to 200MHz 0 0.5 0.9 1.0 dB B

rolloff <30MHz 0.2 0.45 0.6 0.6 dB B
linear phase deviation <30MHz 0.2 0.4 0.5 0.5 deg
differential gain NTSC, R

L

=150Ω 0.1 – – – %

differential phase NTSC, R

L

=150Ω 0.4 – – – deg

TIME DOMAIN RESPONSE

rise and fall time 2V step 4.6 7.0 7.5 8.0 ns
settling time to 0.2% 2V step 15 30 38 40 ns
overshoot 2V step 5 12 12 12 %
slew rate A

V

= +2 2V step 350 260 225 215 V/µs

DISTORTION AND NOISE RESPONSE

2

nd

harmonic distortion 2Vpp, 1MHz -85 – – – dBc

2V

pp

, 1MHz; RL= 1kΩ -85 – – – dBc

2V

pp

, 5MHz -65 -60 -58 -58 dBc B

3

rd

harmonic distortion 2Vpp, 1MHz -64 – – – dBc

2V

pp

, 1MHz; RL= 1kΩ -75 – – – dBc

2V

pp

, 5MHz -50 -45 -44 -44 dBc B

crosstalk (input-referred) 2V

pp

, 5MHz -74 -68 -68 -68 dBc

equivalent input noise

voltage (e

ni

) >1MHz 5 6.3 6.6 6.7 nV/√Hz

non-inverting current (i

bn

) >1MHz 1.4 1.8 1.9 2.3 pA/√Hz

inverting current (i

bi

) >1MHz 13 16 17 18 pA/√Hz

STATIC DC PERFORMANCE

input offset voltage 2 8 11 11 mV A

average drift 25 – 35 40 µV/˚C
input bias current (non-inverting) 2 8 11 15 µA A

average drift 60 – 80 110 nA/˚C
input bias current (inverting) 2 10 18 20 µA A

average drift 20 – 90 110 nA/˚C
power supply rejection ratio DC 55 50 48 48 dB B
common-mode rejection ratio DC 52 48 46 46 dB
supply current R

L

= ∞, 2 channels 3.0 3.4 3.6 3.6 mA A

MISCELLANEOUS PERFORMANCE

input resistance (non-inverting) 5 3 2.5 1 MΩ
input capacitance (non-inverting) 1 2 2 2 pF
common mode input range

±

2.7

±

2.3

±

2.2

±

2.0 V

output voltage range R

L

= 100Ω

±

3.3

±

2.9

±

2.8

±

2.6 V

output voltage range R

L

= ∞

±

4.0

±

3.8

±

3.7

±

3.5 V
output current 96 96 96 60 mA C
output resistance, closed loop DC 0.03 0.15 0.2 0.3 Ω

CLC418 Electrical Characteristics

(AV= +2, Rf= 1kΩ, Vcc= + 5V , RL= 100Ω, T = 25°C;unless specified)

Absolute Maximum Ratings

supply voltage

±

7V
output current (see note C) 96mA
common-mode input voltage

±

V

CC

maximum junction temperature +175°C
storage temperature range -65°C to +150°C
lead temperature (soldering 10 sec) +300°C
ESD rating (human body model) 4000V

Notes

A) J-level: spec is 100% tested at +25°C, sample tested at +85°C.

L-level: spec is 100% wafer probed at +25°C.
B)J-level: spec is sample tested at +25°C.
C)The output current sourced or sunk by the CLC418 can

exceed the maximum safe output current limit.

2

Min/max ratings are based on product characterization and simulation. Individual parameters are tested as noted. Outgoing quality levels are
determined from tested parameters.

3 http://www.national.com

Typical Performance Characteristics

(Av= +2, Rf= 1kΩ, RL= 100Ω, VCC= + 5V, T = 25°C; CLC418AJ; unless specified)

Non-Inverting Frequency Response

Normalized Magnitude (1dB/div)

Frequency (Hz)

10M

Phase (deg)

-90

-180

-450

-270

-360

1M 100M

Av+1

Av+2

Rf=953

Av+2

Av+5

Rf=402

Av+5

Av+10

Rf=200

Av+10

Av+1

Rf=3k

0

Vo = 1V

pp

Gain

Phase

Inverting Frequency Response

Normalized Magnitude (1dB/div)

Frequency (Hz)

10M

Phase (deg)

0

-270

-360

-450

-90

-180

1M 100M

Av-1

Av-2

Rf=681

Av-2

Av-5

Rf=301

Av-5

Av-10

Rf=200

Av-10

Av-1

R

f

=806

Gain

Phase

Vo = 1V

pp

Frequency Response vs. R

L

Normalized Magnitude (1dB/div)

Frequency (Hz)

10M

Phase (deg)

-90

-180

-450

-270

-360

1M 100M

RL=1k

R

f

=1.21k

RL=25

RL=100

RL=100

Rf=1k

RL=1k

RL=25

Rf=0.95k

0

Gain

Phase

Vo = 1V

pp

Frequency Response vs. V

out

Normalized Magnitude (1dB/div)

Frequency (Hz)

10M

1M 100M

0.10V

pp

2.0V

pp

4.0V

pp

1.0V

pp

Frequency Response vs. Capacitive Load

Magnitude (1dB/div)

Frequency (Hz)

10M

1M 100M

CL=100pF

Rs =24.9

CL=10pF

Rs =100

C

L

= 1000pF

Rs =5.7

C

L

1k

R

s

+

-

1k

1k

CL=0pF

Rs =0

V

o

= 1V

pp

Small Signal Channel Matching

Normalized Magnitude (1dB/div)

Frequency (Hz)

1M

10M

100M

Vo = 1V

pp

Phase (deg)

-180

-225

-135

-90

-45

0

Channel A

Channel B

Channel A

Channel B

PSRR and CMRR

PSRR/CMRR (dB)

Frequency (Hz)

60

50

20

10

0

1k

10k

100k

40

30

CMRR

1M 10M 100M

PSRR

Open Loop Transimpedance Gain, Z(s)

Magnitude (Ω)

Frequency (Hz)

1M

100k

100

1k

10k

100M

10k

1k

Gain

Phase (deg)

180

140

20

100

60

Phase

100k 1M 10M

100Ω

-

+

CLC418

V

o

I

i

Equivalent Input Noise

Noise Voltage (nV/√Hz)

Frequency (Hz)

100

1

1k

10k

100M

10

i

bi

Noise Current (pA/√Hz)

100

10

1

100k 1M 10M

e

ni

i

bn

Input-Referred Crosstalk

Crosstalk (dB)

Frequency (Hz)

-40

-60

-50

-90
1M

10M

100M

-70

-80

Vo = 1V

pp

2nd & 3rd Harmonic Distortion

Distortion (dBc)

Frequency (Hz)

-50

-40

-30

-20

-60

-90
1M

10M

-70

-80

2nd 

RL = 1k

3rd 

RL = 100

3rd 

RL = 1k

2nd 

RL = 100

Vo = 2V

pp

2nd Harmonic Distortion, RL = 25Ω

Distortion (dBc)

Output Amplitude (Vpp)

-55

-50

-45

-60

-75
0

1

5

-65

-70

1MHz

2 3 4

2MHz

5MHz

10MHz

3rd Harmonic Distortion, RL = 25Ω

Distortion (dBc)

Output Amplitude (Vpp)

-40

-30

-20

-50

-80
0

1

5

-60

-70

1MHz

2 3 4

2MHz

5MHz

10MHz

2nd Harmonic Distortion, RL = 100Ω

Distortion (dBc)

Output Amplitude (Vpp)

-90

-85

-80

-75

-70

-65

-60

-55

-50

0

1

5

1MHz

2 3 4

2MHz

5MHz

10MHz

3rd Harmonic Distortion, RL = 100Ω

Distortion (dBc)

Output Amplitude (Vpp)

-80

-70

-60

-50

-40

-30

0

1

5

1MHz

2 3 4

2MHz

5MHz

10MHz

http://www.national.com 4

Typical Performance Characteristics

(Av= +2, Rf= 1kΩ, RL= 100Ω, VCC= + 5V, T = 25°C; CLC418AJ; unless specified)

3rd Harmonic Distortion, RL = 1kΩ

Distortion (dBc)

Output Amplitude (Vpp)

-95

-90

-85

-80

-75

-70

-65

-60

-55

0

1

5

1MHz

2 3 4

2MHz

5MHz

10MHz

2nd Harmonic Distortion, RL = 1kΩ

Distortion (dBc)

Output Amplitude (Vpp)

-95

-90

-85

-80

-75

-70

-65

-60

0

1

5

1MHz

2 3 4

2MHz

5MHz

10MHz

Closed Loop Output Resistance

Output Resistance (Ω)

Frequency (Hz)

100

0.1
10M

100M

10

1

Gain Flatness & Linear Phase Deviation

Magnitude (0.1dB/div)

Frequency (Hz)

1M

10M

Gain

Phase Deviation (0.1°/div)

Phase

Small Signal Pulse Response

Output Voltage

Time (10ns/div)

0.20

0.10

-0.20

0

-0.10

Av+2

Av-2

Large Signal Pulse Response

Output Voltage

Time (10ns/div)

4.0

2.0

-4.0

0

-2.0

Av+2

Av-2

Pulse Crosstalk

Active Channel Output (1V/div)

Time (10ns/div)

Active Output Channel

Other Channel Output (20mV/div)

Short Term Settling Time

V

o

(% Output Step)

Time (s)

0.2

0.1

-0.2
0

20n

100n

0

-0.1

V

out

= 2V

step

40n 60n 80n

Long Term Settling Time

V

o

(% Output Step)

Time (s)

0.4

-0.4
1

µ

1m

1

0

10

µ

100

µ

10m 100m

-0.2

0.2

Settling Time vs. Capacitive Load

Settling Time (ns)

CL (F)

70

60

30

20

10

100p20p

1000p

50

40

Rs (Ω)

60

50

20

10

0

40

30

R

s

0.05%

0.1%

IBI, IBN, VOS vs. Temperature

Offset Voltage V

OS

(mV)

Temperature (°C)

7.0

6.0

1.0

-50

0

100

5.0

4.0

3.0

2.0

V

OS

I

BI

, I

BN

(µA)

3.5

3.0

1.5

1.0

0.5

2.5

2.0

50

I

BI

I

BN