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Número de pieza | LH0033C | |
Descripción | Fast Buffer | |
Fabricantes | Calogic LLC | |
Logotipo | ||
Hay una vista previa y un enlace de descarga de LH0033C (archivo pdf) en la parte inferior de esta página. Total 9 Páginas | ||
No Preview Available ! CORPORATION
Fast Buffer
LH0033 / LH0033C
FEATURES
• Slew rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1500V/µs
Wide range single or dual supply operation
• Bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100MHz
•• High output drive . . . . . . . . . . . . . . . ±10V with 50Ω load
Low phase non-linearity . . . . . . . . . . . . . . . . 2 degrees
• Rise times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3ns
•• High input resistance:. . . . . . . . . . . . . . . . . . . . . . . 1010Ω
• High output current (peak) . . . . . . . . . . . . . . . . . 250mA
APPLICATIONS
Coaxial Cable Driver
• Fast Op Amp Booster
• Flash Converter Driver
• Video Line Driver
• High Speed Sample and Hold
• ATE Pin Driver
• Video Amplifier
• Radar
• Sonar
• Boost OP Amp Output
•• Isolate Capacitance Load
GENERAL DESCRIPTION
The LH0033 is a high speed, FET input, voltage
follower/buffer designed to provide high current drive (up to
100mA) at frequencies from DC to over 100MHz. The
LH0033 slews at 1500V/µs and exhibits excellent phase
linearity up to 20MHz.
LH0033 is intended to fulfill a wide range of buffer applications
such as high speed line drivers, video impedance
transformation, nuclear instrumentation amplifiers, op amp
isolation buffers for driving reactive loads and high impedance
input buffers for high speed A to Ds and comparators. In
addition, the LH0033 can continuously drive 50Ω coaxial
cables or be used as a yoke driver for high resolution CRT
displays.
This device is constructed using specially selected junction
FETs and active laser trimming to achieve guaranteed
performance specifications. The LH0033 is specified for
operation from -55oC to +125oC and the LH0033C is specified
from -25oC to 85oC. The LH0033 is available in a 2.2W metal
TO-8 package.
ORDERING INFORMATION
Part Package
LH0033G H12A (TO8 12 Lead)
LH0033CG H12A (TO8 12 Lead)
Temperature Range
-55oC to 125oC
-25oC to 85oC
CONNECTION DIAGRAM
LH0033
Metal Can Package
NC NC VC+
NC 3 2 1 V +
4 12
INPUT
5
11 OUTPUT
OFFSET
PRESET
6 10
789
OFFSET
VC
ADJUST
NC
Top View
V-
Case is electrically Isolated
Package H12A
CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-1076
1 page CORPORATION
LH0033 / LH0033C
APPLICATION INFORMATION:
Recommended Layout Precautions
RF/video printed circuit board layout rules should be followed
when using the LH0033 since it will provide power gain to
frequencies over 100MHz. Ground planes are recommended
and power supplies should be decoupled at each device with
low inductance capacitors. In addition, ground plane shielding
may be extended to the metal case of the device since it is
electrically isolated from internal circuitry. Alternatively the
case should be connected to the output to minimize input
capacitance.
Offset Voltage Adjustment
The LH0033’s offset voltages have been actively trimmed by
laser to meet guaranteed specifications when the offset preset
pin is shorted to the offset adjust pin. If offset null is desirable,
it is simply obtained by leaving the offset preset pin open and
connecting a trim pot of 200Ω for the LH0033 between the
offset adjust pin and V–, as illustrated in Figure 1.
Operation From Single Or Asymmetrical Power Supplies
LH0033 may be used in applications where symmetrical
supplies are unavailable or not desirable. A typical application
might be an interface to a MOS shift register where V+ = +5V
and V– = -12V. In this case, an apparent output offset occurs
due to the device’s voltage gain of less than unity. This
additional output error may be predicted by:
∆VO
≅
(1−AV)
(V+−V−)
2
=
0.005
(V+
−V−)
where:
AV = No load voltage gain, typically 0.99
V+ = Positive supply voltage
V– = Negative supply voltage
For the above example, ∆VO would be -35mV. This may be
adjusted to zero as described in Figure 1. For AC coupled
applications, no additional offset occurs if the DC input is
properly biased as illustrated in the Typical Applications
section.
Short Circuit Protection
In order to optimize transient response and output swing,
output current limit has been omitted from the LH0033.
Short circuit protection may be added by inserting
appropriate
V– and VC–
value resistors between V+
pins as illustrated in Figure
and VC+ pins and
2. Resistor values
may be predicted by:
RLIM
≅
V+
ISC
=
V−
ISC
where:
ISC ≤ 100mA for LH0033
The inclusion of limiting resistors in the collectors of the output
transistors reduces output voltage swing. Decoupling VC+
and VC– pins with capacitors to ground will retain full output
swing for transient pulses. Alternate active current limit
techniques that retain full DC output swing are shown in
FIGURE 1. Offset Zero Adjust
FIGURE 2. Resistor Current Limiting Using Resistor
V+
INPUT
OFFSET
PRESET
(OPEN)
OFFSET
ADJUST
200Ω
51
6
LH0033
7
9
+15V
12 11
OUTPUT
10
-15V
R LIM
100
INPUT
12 C ≅ 0.1µF
5
LH0033
1
11
9
10
7
6
R LIM
100
OUTPUT
C ≅ 0.1µF
V-
CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-1076
5 Page |
Páginas | Total 9 Páginas | |
PDF Descargar | [ Datasheet LH0033C.PDF ] |
Número de pieza | Descripción | Fabricantes |
LH0033 | Fast Buffer | Calogic LLC |
LH0033C | Fast Buffer | Calogic LLC |
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