NSC LM6221N Datasheet
LM6121/LM6221/LM6321
High Speed Buffer
LM6121/LM6221/LM6321 High Speed Buffer
May 1998
General Description
These high speed unity gain buffers slew at 800 V/µs and
have a small signal bandwidth of 50 MHz while driving a 50Ω
load. They can drive
while driving large capacitive loads. The LM6121 family are
monolithic ICs which offer performance similar to the
LH0002 with the additional features of current limit and thermal shutdown.
These buffers are built with National’s VIP
grated PNP) process which provides fast PNP transistors
that are true complements to the already fast NPN devices.
This advanced junction-isolated process delivers high speed
performance without the need for complex and expensive dielectric isolation.
±
300 mA peak and do not oscillate
™
(Vertically Inte-
Simplified Schematic
Features
n High slew rate: 800 V/µs
n Wide bandwidth: 50 MHz
n Slew rate and bandwidth 100%tested
n Peak output current:
n High input impedance: 5 MΩ
n LH0002H pin compatible
n No oscillations with capacitive loads
±
n 5V to
n Current and thermal limiting
n Fully specified to drive 50Ω lines
15V operation guaranteed
±
300 mA
Applications
n Line Driving
n Radar
n Sonar
Numbers in ( ) are for 8-pin N DIP.
VIP™is a trademark ofNational Semiconductor Corporation.
© 1999 National Semiconductor Corporation DS009223 www.national.com
DS009223-1
Connection Diagrams
Plastic DIP
*Heat-sinking pins. See Application section on heat sinking requirements.
Order Number LM6221N,
LM6321N or LM6121J/883
See NS Package
Number J08A or N08E
Note: Pin 6 connected to case.
Order Number LM6221H or
See NS Package
DS009223-2
Metal Can
DS009223-3
Top View
LM6121H/883
Number H08C
Plastic SO
*Pin 3 must be connected to the negative supply.
**Heat-sinking pins. See Application section on heat-sinking requirements.
These pins are at V
−
potential.
Order Number LM6321M
See NS Package Number M14A
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DS009223-7
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
±
Vsupply
±
2000V
±
18)
±
7V
Supply Voltage 36V (
Input to Output Voltage (Note 2)
Input Voltage
Output Short-Circuit to GND Continuous
(Note 3)
Storage Temperature Range −65˚C to +150˚C
Lead Temperature
(Soldering, 10 seconds) 260˚C
Power Dissipation (Note 10)
ESD Tolerance (Note 8)
Junction Temperature (T
) 150˚C
J(max)
Operating Ratings
Operating Temperature Range
LM6121H/883 −55˚C to +125˚C
LM6221 −40˚C to +85˚C
LM6321 0˚C to +70˚C
Operating Supply Range 4.75 to
Thermal Resistance (θ
H Package 150˚C/W
N Package 47˚C/W
M Package 69˚C/W
Thermal Resistance (θ
), (Note 4)
JA
), H Package 17˚C/W
JC
±
16V
DC Electrical Characteristics
=
The following specifications apply for Supply Voltage
Boldface limits apply for T
=
=
T
A
to T
T
J
MIN
MAX
±
15V, V
; all other limits T
Symbol Parameter Conditions Typ LM6121 LM6221 LM6321 Units
A
A
A
Voltage Gain 1 R
V1
Voltage Gain 2 R
V2
Voltage Gain 3 R
V3
(Note 6) V
V
I
R
C
R
I
I
V
V
V
V
Offset Voltage R
OS
Input Bias Current R
B
Input Resistance R
IN
Input Capacitance 3.5 pF
IN
Output Resistance I
O
Supply Current 1 R
S1
Supply Current 2 R
S2
Output Swing 1 R
O1
Output Swing 2 R
O2
Output Swing 3 R
O3
Output Swing 4 R
O4
=
1kΩ,V
L
=
50Ω,V
L
=
50Ω,V
L
=
2V
IN
=
1kΩ 15 30 30 50 mV
L
=
1kΩ,R
L
=
50Ω 5MΩ
L
=
OUT
=
∞
L
=
∞
L
=
1k 13.5 13.3 13.3 13.2
L
=
100Ω 12.7 11.5 11.5 11
L
=
50Ω 12 11 11 10
L
=
50Ω,V
L
=
±
10V 0.990 0.980 0.980 0.970
IN
=
±
10V 0.900 0.860 0.860 0.850 V/V
IN
+
=
5V 0.840 0.780 0.780 0.750
(1.5 Vpp) 0.750 0.700 0.700
pp
=
10 kΩ 14 45µA
S
±
10 mA 3 5 5 5 Ω
+
=
,V
5V 14 16 16 18
+
=
5V 1.8 1.6 1.6 1.6 V
(Note 6) 1.3 1.4 1.5 Min
±
=
PSSR Power Supply V
±
5V to±15V 70 60 60 60 dB
Rejection Ratio 55 50 50 Min
=
≥ 100 kΩ and R
0, R
CM
L
=
=
T
25˚C.
A
J
=
50Ω unless otherwise noted.
S
Limit Limit Limit
(Notes 5, 9) (Note 5) (Note 5)
0.970 0.950 0.950
0.800 0.820 0.820 Min
50 60 100 Max
777Max
10 10 6 Max
15 18 18 20 mA
20 20 22
18 18 20
13 13 13
10 10 10 Min
999
Max
±
PP
V
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