Features
s
130mA output current
s
0.15%, 0.02 differential gain, phase
s
1.5mA/ch supply current
s
90MHz bandwidth (A
v
= +2)
s
-87/-93dBc HD2/HD3 (1MHz)
s
17ns settling to 0.05%
s
290V/
s slew rate
s
Stable for capacitive loads up to 1000pf
s
Single 5V to 5V supplies
Applications
s
Video line driver
s
Coaxial cable driver
s
Twisted pair driver
s
Transformer/coil driver
s
High capacitive load driver
s
Portable/battery-powered applications
s
A/D driver
OUT1
-IN1
+IN1
-V
CC
OUT2
-IN2
+IN2
+V
CC
1k
+
-
+
-
1k
1k
1k
Typical Application
Differential Line Driver with Load Impedance Conversion
Pinout
DIP & SOIC
General Description
The CLC5612 is a dual, low-cost, high-speed (90MHz) buffer
which features user-programmable gains of +2, +1, and
-1V/V. The CLC5612 also has a new output stage that delivers
high output drive current (130mA), but consumes minimal
quiescent supply current (1.5mA/ch) from a single 5V supply. Its
current feedback architecture, fabricated in an advanced comple-
mentary bipolar process, maintains consistent performance over
a wide range of gains and signal levels, and has a linear-phase
response up to one half of the -3dB frequency.
The CLC5612 offers 0.1dB gain flatness to 18MHz and differen-
tial gain and phase errors of 0.15% and 0.02. These features are
ideal for professional and consumer video applications.
The CLC5612 offers superior dynamic performance with a
90MHz small-signal bandwidth, 290V/
s slew rate and 6.2ns
rise/fall times (2V
step
). The combination of low quiescent power,
high output current drive, and high-speed performance make
the CLC5612 well suited for many battery-powered personal
communication/computing systems.
The ability to drive low-impedance, highly capacitive loads,
makes the CLC5612 ideal for single ended cable applications.
It also drives low impedance loads with minimum distortion.
The CLC5612 will drive a 100
load with only -74/-86dBc
second/third harmonic distortion (A
v
= +2, V
out
= 2V
pp
, f = 1MHz).
With a 25
load, and the same conditions, it produces only -70/
-67dBc second/third harmonic distortion. It is also optimized for
driving high currents into single-ended transformers and coils.
When driving the input of high-resolution A/D converters, the
CLC5612 provides excellent -87/-93dBc second/third harmonic
distortion (A
v
= +2, V
out
= 2V
pp
, f = 1MHz, R
L
= 1k
) and fast
settling time.
Maximum Output Voltage vs. R
L
Output Voltage (V
pp
)
R
L
(
)
1
2
3
4
5
6
7
8
9
10
10
100
1000
V
s
= +5V
V
CC
=
5V
CLC5612
Dual, High Output, Programmable Gain Buffer
N
June 1999
CLC5612
Dual,
High Output,
Pr
ogrammab
le Gain Buff
er
1999 National Semiconductor Corporation
http://www.national.com
Printed in the U.S.A.
+
V
o
-
R
t2
V
in
R
t
R
m/2
R
m/2
R
L
Z
o
UTP
I
o
R
eq
1:n
V
d/2
1
7
6
8
5
3
4
2
1k
+
-
+
-
1k
1k
1k
CLC5612
-V
d/2
Note: Supplies and bypassing not shown.
http://www.national.com
2
PARAMETERS
CONDITIONS
TYP
MIN/MAX RATINGS
UNITS
NOTES
Ambient Temperature
CLC5612IN/IM
+25C
+25C
0 to 70C
-40 to 85C
FREQUENCY DOMAIN RESPONSE
-3dB bandwidth
V
o
= 0.5V
pp
75
50
50
50
MHz
V
o
= 2.0V
pp
62
57
54
52
MHz
-0.1dB bandwidth
V
o
= 0.5V
pp
18
13
11
11
MHz
gain peaking
<200MHz, V
o
= 0.5V
pp
0
0.5
0.9
1.2
dB
gain rolloff
<30MHz, V
o
= 0.5V
pp
0.2
0.9
1.0
1.0
dB
linear phase deviation
<30MHz, V
o
= 0.5V
pp
0.1
0.4
0.5
0.5
deg
differential gain
NTSC, R
L
= 150
to -1V
0.09
%
differential phase
NTSC, R
L
= 150
to -1V
0.14
deg
TIME DOMAIN RESPONSE
rise and fall time
2V step
5.5
9.0
9.7
10.5
ns
settling time to 0.05%
1V step
20
28
45
70
ns
overshoot
2V step
3
6.5
14
14
%
slew rate
2V step
185
150
130
120
V/
s
DISTORTION AND NOISE RESPONSE
2
nd
harmonic distortion
2V
pp
, 1MHz
-74
-70
-67
-67
dBc
2V
pp
, 1MHz; R
L
= 1k
-79
-77
-72
-72
dBc
2V
pp
, 5MHz
-65
-58
-58
-58
dBc
3
rd
harmonic distortion
2V
pp
, 1MHz
-86
-82
-79
-79
dBc
2V
pp
, 1MHz; R
L
= 1k
-81
-79
-76
-76
dBc
2V
pp
, 5MHz
-60
-55
-53
-53
dBc
equivalent input noise
voltage (e
ni
)
>1MHz
3.4
4.4
4.9
4.9
nV/
Hz
non-inverting current (i
bn
)
>1MHz
6.3
8.2
9.0
9.0
pA/
Hz
inverting current (i
bi
)
>1MHz
8.7
11.3
12.4
12.4
pA/
Hz
crosstalk (input referred)
10MHz, 1V
pp
-80
dB
STATIC DC PERFORMANCE
input offset voltage
8
30
35
35
mV
A
average drift
80
V/C
input bias current (non-inverting)
3
14
18
18
A
A
average drift
25
nA/C
gain accuracy
0.3
1.5
2.0
2.0
%
A
internal resistors (R
f
, R
g
)
1000
20%
26%
30%
power supply rejection ratio
DC
48
45
43
43
dB
common-mode rejection ratio
DC
47
45
43
43
dB
supply current (per amplifier)
R
L
=
1.5
1.7
1.8
1.8
mA
A
MISCELLANEOUS PERFORMANCE
input resistance (non-inverting)
0.41
0.29
0.26
0.26
M
input capacitance (non-inverting)
2.2
3.3
3.3
3.3
pF
input voltage range, High
4.2
4.1
4.0
4.0
V
input voltage range, Low
0.8
0.9
1.0
1.0
V
output voltage range, High
R
L
= 100
4.0
3.9
3.8
3.8
V
output voltage range, Low
R
L
= 100
1.0
1.1
1.2
1.2
V
output voltage range, High
R
L
=
4.1
4.0
4.0
3.9
V
output voltage range, Low
R
L
=
0.9
1.0
1.0
1.1
V
output current
100
80
65
40
mA
output resistance, closed loop
DC
400
600
600
600
m
Min/max ratings are based on product characterization and simulation. Individual parameters are tested as noted. Outgoing quality levels are
determined from tested parameters.
+5V Electrical Characteristics
(A
v
= +2, R
L
= 100
, V
s
= +5V
1
, V
cm
= V
EE
+ (V
s
/2), R
L
tied to V
cm
, unless specified)
Absolute Maximum Ratings
supply voltage (V
CC
- V
EE
)
+14V
output current (see note C)
140mA
common-mode input voltage
V
EE
to V
CC
maximum junction temperature
+150C
storage temperature range
-65C to +150C
lead temperature (soldering 10 sec)
+300C
Notes
A) J-level: spec is 100% tested at +25C.
B) The short circuit current can exceed the maximum safe
output current.
1) V
s
= V
CC
- V
EE
Reliability Information
Transistor Count
98
MTBF (based on limited test data)
285Mhr
3
http://www.national.com
PARAMETERS
CONDITIONS
TYP
GUARANTEED MIN/MAX
UNITS
NOTES
Ambient Temperature
CLC5612IN/IM
+25C
+25C
0 to 70C
-40 to 85C
FREQUENCY DOMAIN RESPONSE
-3dB bandwidth
V
o
= 1.0V
pp
90
75
65
65
MHz
V
o
= 4.0V
pp
49
43
40
38
MHz
-0.1dB bandwidth
V
o
= 1.0V
pp
17
12
10
10
MHz
gain peaking
<200MHz, V
o
= 1.0V
pp
0
0.5
0.9
1.0
dB
gain rolloff
<30MHz, V
o
= 1.0V
pp
0.2
0.5
0.7
0.7
dB
linear phase deviation
<30MHz, V
o
= 1.0V
pp
0.2
0.4
0.5
0.5
deg
differential gain
NTSC, R
L
=150
0.15
0.4
%
differential phase
NTSC, R
L
=150
0.02
0.06
deg
TIME DOMAIN RESPONSE
rise and fall time
2V step
6.2
6.9
7.3
7.7
ns
settling time to 0.05%
2V step
17
19
35
55
ns
overshoot
2V step
10
16
18
18
%
slew rate
2V step
290
250
220
200
V/
s
DISTORTION AND NOISE RESPONSE
2
nd
harmonic distortion
2V
pp
, 1MHz
-74
-70
-67
-67
dBc
2V
pp
, 1MHz; R
L
= 1k
-87
-80
-77
-77
dBc
2V
pp
, 5MHz
-67
-61
-59
-59
dBc
3
rd
harmonic distortion
2V
pp
, 1MHz
-86
-82
-79
-79
dBc
2V
pp
, 1MHz; R
L
= 1k
-93
-88
-85
-85
dBc
2V
pp
, 5MHz
-63
-59
-56
-56
dBc
equivalent input noise
voltage (e
ni
)
>1MHz
3.4
4.4
4.9
4.9
nV/
Hz
non-inverting current (i
bn
)
>1MHz
6.3
8.2
9.0
9.0
pA/
Hz
inverting current (i
bi
)
>1MHz
8.7
11.3
12.4
12.4
pA/
Hz
crosstalk (input referred)
10MHz, 1V
pp
-80
dB
STATIC DC PERFORMANCE
output offset voltage
3
30
35
35
mV
average drift
80
V/C
input bias current (non-inverting)
5
12
16
17
A
average drift
40
nA/C
gain accuracy
0.3
1.5
2.0
2.0
%
internal resistors (R
f
, R
g
)
1000
20%
26%
30%
power supply rejection ratio
DC
48
45
43
43
dB
common-mode rejection ratio
DC
48
46
44
44
dB
supply current (per amplifier)
R
L
=
1.6
1.9
2.0
2.0
mA
MISCELLANEOUS PERFORMANCE
input resistance (non-inverting)
0.52
0.38
0.34
0.34
M
input capacitance (non-inverting)
1.9
2.85
2.85
2.85
pF
common-mode input range
4.2
4.1
4.1
4.0
V
output voltage range
R
L
= 100
3.8
3.6
3.6
3.5
V
output voltage range
R
L
=
4.0
3.8
3.8
3.7
V
output current
130
100
80
50
mA
B
output resistance, closed loop
DC
400
600
600
600
m
5V Electrical Characteristics
(A
v
= +2, R
L
= 100
, V
CC
= 5V, unless specified)
Notes
B) The short circuit current can exceed the maximum safe
output current.
Ordering Information
Model
Temperature Range
Description
CLC5612IN
-40
C to +85
C
8-pin PDIP
CLC5612IM
-40
C to +85
C
8-pin SOIC
CLC5612IMX
-40
C to +85
C
8-pin SOIC tape and reel
Package Thermal Resistance
Package
JC
JA
Plastic (IN)
65
C/W
130
C/W
Surface Mount (IM)
50
C/W
145
C/W
http://www.national.com
4
+5V Typical Performance
(A
v
= +2, R
L
= 100
, V
s
= +5V
1
, V
cm
= V
EE
+ (V
s
/2), R
L
tied to V
cm
, unless specified)
Non-Inverting Frequency Response
Normalized Magnitude (1dB/div)
Frequency (Hz)
1M
10M
100M
Phase (deg)
-90
0
-180
-450
-270
-360
Gain
Phase
V
o
= 0.5V
pp
A
v
= -1
A
v
= +1
A
v
= +2
Frequency Response vs. R
L
Magnitude (1dB/div)
Frequency (Hz)
1M
10M
100M
Phase (deg)
-90
0
-180
-450
-270
-360
Gain
Phase
V
o
= 0.5V
pp
R
L
= 25
R
L
= 100
R
L
= 1k
Gain Flatness & Linear Phase
Magnitude (0.1dB/div)
Frequency (MHz)
10
20
30
0
Phase (deg)
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
Gain
Phase
Frequency Response vs. V
o
(A
v
= 2)
Magnitude (1dB/div)
Frequency (Hz)
1M
10M
100M
V
o
= 2V
pp
V
o
= 1V
pp
V
o
= 0.1V
pp
V
o
= 2.5V
pp
Frequency Response vs. V
o
(A
v
= 1)
Magnitude (1dB/div)
Frequency (Hz)
1M
10M
100M
V
o
= 2V
pp
V
o
= 1V
pp
V
o
= 0.1V
pp
V
o
= 2.5V
pp
Frequency Response vs. V
o
(A
v
= -1)
Magnitude (1dB/div)
Frequency (Hz)
1M
10M
100M
V
o
= 2V
pp
V
o
= 1V
pp
V
o
= 0.1V
pp
V
o
= 2.5V
pp
PSRR & CMRR
PSRR & CMRR (dB)
Frequency (Hz)
1k
10k
100M
0
10
20
30
40
50
60
100k
1M
10M
PSRR
CMRR
Equivalent Input Noise
Noise Voltage (nV/
Hz)
Frequency (Hz)
3.6
3.5
3.4
3.3
3.2
3.1
10k
100k
1M
10M
3.0
Non-Inverting Current 7.6pA/
Hz
Inverting Current 10.8pA/
Hz
Voltage 3.1nV/
Hz
Noise Current (pA/
Hz)
11
15
7
3
2nd & 3rd Harmonic Distortion
Distortion (dBc)
Frequency (Hz)
1M
10M
-100
-90
-80
-70
-50
-60
2nd
R
L
= 1k
2nd
R
L
= 100
3rd
R
L
= 100
3rd
R
L
= 1k
V
o
= 2V
pp
2nd & 3rd Harmonic Distortion, R
L
= 25
Distortion (dBc)
Output Amplitude (V
pp
)
0
0.5
1
1.5
2
2.5
-80
-70
-60
-50
-30
-40
3rd, 10MHz
2nd, 1MHz
2nd, 10MHz
3rd, 1MHz
2nd & 3rd Harmonic Distortion, R
L
= 100
Distortion (dBc)
Output Amplitude (V
pp
)
0
0.5
1
1.5
2
2.5
-90
-80
-70
-60
-50
-40
3rd, 10MHz
2nd, 1MHz
2nd, 10MHz
3rd, 1MHz
2nd & 3rd Harmonic Distortion, R
L
= 1k
Distortion (dBc)
Output Amplitude (V
pp
)
0
0.5
1
1.5
2
2.5
-90
-100
-80
-70
-60
-50
3rd, 10MHz
2nd, 1MHz
2nd, 10MHz
3rd, 1MHz
Large & Small Signal Pulse Response
Output Voltage (0.02V/div)
Time (10ns/div)
Large Signal
Small Signal
Closed Loop Output Resistance
Output Resistance (
)
Frequency (Hz)
10k
100k
1M
10M
100M
0.01
0.1
1
10
100
V
CC
=
5V
I
BN
& V
IO
vs. Temperature
Offset Voltage V
IO
(mV)
Temperature (
C)
-60
-40
-20
0
20
40
60
80
100
-1.5
I
BN
(
A)
-0.6
-1
-0.5
-0.5
-0.4
0
-0.3
0.5
-0.2
1.5
1
0
-0.1
I
BN
V
IO
5
http://www.national.com
5V Typical Performance
(A
v
= +2, R
L
= 100
, V
CC
= 5V, unless specified)
Frequency Response
Normalized Magnitude (1dB/div)
Frequency (Hz)
1M
10M
100M
Phase (deg)
-45
0
-90
-225
-135
-180
Gain
Phase
V
o
= 1.0V
pp
A
v
= -1
A
v
= +1
A
v
= +2
Frequency Response vs. R
L
Magnitude (1dB/div)
Frequency (Hz)
1M
10M
100M
Phase (deg)
-90
0
-180
-450
-270
-360
Gain
Phase
V
o
= 1.0V
pp
R
L
= 1k
R
L
= 100
R
L
= 25
Gain Flatness & Linear Phase
Magnitude (0.1dB/div)
Frequency (MHz)
0
5
25
Phase (deg)
0.2
-1.2
-1.0
-0.8
-0.6
-0.4
-0.2
0
Gain
Phase
10
15
20
30
Frequency Response vs. V
o
(A
v
= 2)
Magnitude (1dB/div)
Frequency (Hz)
1M
10M
100M
V
o
= 2V
pp
V
o
= 0.1V
pp
V
o
= 1V
pp
V
o
= 5V
pp
Frequency Response vs. V
o
(A
v
= 1)
Magnitude (1dB/div)
Frequency (Hz)
1M
10M
100M
V
o
= 2V
pp
V
o
= 0.1V
pp
V
o
= 1V
pp
V
o
= 5V
pp
Frequency Response vs. V
o
(A
v
= -1)
Magnitude (1dB/div)
Frequency (Hz)
1M
10M
100M
V
o
= 2V
pp
V
o
= 0.1V
pp
V
o
= 1V
pp
V
o
= 5V
pp
Large & Small Signal Pulse Response
Output Voltage (0.5V/div)
Time (20ns/div)
Large Signal
Small Signal
Differential Gain & Phase
Gain (%)
Number of 150
Loads
1
2
3
4
Phase (deg)
-0.2
0.2
-0.7
-0.15
-0.6
-0.1
-0.5
-0.05
-0.4
0
-0.3
0.05
-0.2
0.1
-0.1
0.15
0
0.1
Phase Neg Sync
Phase Pos Sync
Gain Neg Sync
Gain Pos Sync
2nd & 3rd Harmonic Distortion vs. Frequency
Distortion Level (dBc)
Frequency (MHz)
1
10
-100
-90
-80
-70
-60
-50
2nd
R
L
= 100
2nd
R
L
= 1k
3rd
R
L
= 100
3rd
R
L
= 1k
V
o
= 2V
pp
2nd & 3rd Harmonic Distortion, R
L
= 25
Distortion (dBc)
Output Amplitude (V
pp
)
0
1
2
3
4
5
-80
-70
-60
-50
-40
-30
3rd, 10MHz
2nd, 1MHz
2nd, 10MHz
3rd, 1MHz
2nd & 3rd Harmonic Distortion, R
L
= 100
Distortion (dBc)
Output Amplitude (V
pp
)
0
0.5
1
1.5
2
2.5
-90
-80
-70
-60
-50
-40
3rd, 10MHz
2nd, 1MHz
2nd, 10MHz
3rd, 1MHz
2nd & 3rd Harmonic Distortion, R
L
= 1k
Distortion (dBc)
Output Amplitude (V
pp
)
0
1
2
3
4
5
-110
-100
-90
-80
-70
-60
-50
3rd, 10MHz
2nd, 1MHz
2nd, 10MHz
3rd, 1MHz
Short Term Settling Time
V
o
(% Output Step)
Time (ns)
1
10
100
1000
10000
-0.2
-0.15
-0.1
-0.05
0
0.05
0.1
0.15
0.2
Long Term Settling Time
V
o
(% Output Step)
Time (s)
1
10
100
1m
100m
-0.2
-0.15
-0.1
-0.05
0
0.05
0.1
0.15
0.2
10m
I
BN
& V
OS
vs. Temperature
Offset Voltage V
OS
(mV)
Temperature (
C)
-60
-20
20
60
100
140
4
I
BN
(
A)
-4
5
-3
6
-2
7
-1
8
0
9
1
I
BN
V
OS
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