LH0033CG - Calogic, LLC

Fast Buffer
LLC
LH0033 / LH0033C
GENERAL DESCRIPTION
FEATURES
• Slew rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1500V/µs
• Wide range single or dual supply operation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100MHz
• Bandwidth
• High output drive . . . . . . . . . . . . . . . ±10V with 50Ω load
• Low phase non-linearity . . . . . . . . . . . . . . . . 2 degrees
times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3ns
• Rise
• High input resistance:. . . . . . . . . . . . . . . . . . . . . . . 1010Ω
• High output current (peak) . . . . . . . . . . . . . . . . . 250mA
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.
APPLICATIONS
Cable Driver
• Coaxial
• Fast Op Amp Booster
• Flash Converter Driver
Line Driver
• Video
• High Speed Sample and Hold
• ATE Pin Driver
Amplifier
• Video
• Radar
• Sonar
OP Amp Output
• Boost
• Isolate Capacitance Load
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
LH0033CG
H12A (TO8 12 Lead)
H12A (TO8 12 Lead)
Temperature Range
-55oC to 125oC
-25oC to 85oC
CONNECTION DIAGRAM
LH0033
Metal Can Package
NC
VC+
NC
3
NC
INPUT
2
V+
1
4
12
5
11
6
OFFSET
PRESET
10
7
OFFSET
ADJUST
OUTPUT
8
V-
9
NC
VC
Top View
Case is electrically Isolated
Package H12A
CALOGIC LLC, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-1076
DS048 REV A
LH0033 / LH0033C
LLC
ABSOLUTE MAXIMUM RATINGS
Continuous Output Current
LH0033/LH0033C . . . . . . . . . . . . . . . . . . . . . . . . . ±100mA
Peak Output Current
LH0033/LH0033C . . . . . . . . . . . . . . . . . . . . . . . . . ±250mA
Lead Temp. (Soldering, 10 seconds). . . . . . . . . . . . . . . 300oC
Operating Temperature Range
LH0033. . . . . . . . . . . . . . . . . . . . . . . . . . . . -55oC to +125oC
LH0033C . . . . . . . . . . . . . . . . . . . . . . . . . . . -25oC to +85oC
Storage Temperature Range . . . . . . . . . . -65oC to +150oC
If Military/Aerospace specified devices are required, please
contact Calogic Sales Office for availability and specifications.
Supply Voltage (V+ - V-). . . . . . . . . . . . . . . . . . . . . . . . . . . 40V
Power Dissipation (See Curves)
LH0033/LH0033C . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.2W
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . 175oC
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±VSupply
DC ELECTRICAL CHARACTERISTICS: The following specifications apply for supply voltage = ±15V unless otherwise noted (Note 1)
SYMBOL
LH0033
CHARACTERISTICS
MIN
VOS
Output Offset Voltage
∆VOS
∆T
Average Temperature
Coefficient of Offset Voltage
IB
Input Bias Current
AV
Voltage Gain
RIN
Input Impedance
ROUT
Output Impedance
V(SWING 1)
Output Voltage Swing
V(SWING 2)
LH0033C
TYP
MAX
5.0
50
MIN
0.98
10
11
10
10
15
12
20
25
mV
mV
RS = 100Ω, TJ = 25oC,
VIN = 0V (Note 2), RS = 100Ω
100
50
100
µV/ oC
RS = 100Ω, VIN = 0V (Note 3)
500
5.0
20
pA
nA
nA
VIN = 0V
TJ = 25 oC (Note 2)
TA = 25oC (Note 4)
TJ = TA = T MAX
1.00
V/V
VO = ±10V, RS = 100Ω, RL = 1.0kΩ
Ω
RL = 1kΩ
10
Ω
VIN = ±1.0V, RL = 1.0k
1.00
10
0.96
0.98
10
11
10
6.0
CONDITIONS
MAX
250
2.5
10
0.97
UNITS
TYP
10
10
6.0
±12
±12
±9.0
±9.0
VI = ±14V, RL = 1.0k
V
VI = ±10.5V, RL = 100Ω, TA = 25oC
IS
Supply Current
18
22
18
24
mA
VIN = 0V (Note 5)
PD
Power Consumption
540
660
540
720
mW
VIN = 0V
AC ELECTRICAL CHARACTERISTICS: TJ = 25oC, VS = ± 15V, RS = 50Ω, RL = 1.0KΩ (Note 3)
SYMBOL
LH0033
CHARACTERISTICS
MIN
TYP
1000
1500
LH0033C
MAX
MIN
TYP
1000
1400
UNITS
CONDITIONS
MAX
Slew Rate
BW
Bandwidth
100
100
MHz
Phase Non- Linearity
2.0
2.0
degrees
Rise Time
2.9
3.2
ns
∆VIN = 0.5V
Propagation Delay
1.2
1.5
ns
∆VIN = 0.5V
Harmonic Distortion
<0.1
<0.1
%
f>1kHz
RT
V/µs
VIN = ±10V
SR
VIN = 1.0Vrms
BW = 1.0Hz to 20MHz
o
Note 1: LH0033 is 100% production tested as specified at 25 C. Specifications at temperature extremes are verified by sample testing,
correlation or periodic characterization.
Note 2: Specification is at 25oC junction temperature due to requirements of high speed automatic testing. Actual values at operating temperature
will exceed the value at TJ = 25oC. When supply voltages are ±15V, no-load operating junction temperature may rise 40-60oC above ambient, and
more under load conditions. Accordingly, VOS may change one to several mV, and IB will change significantly during warm-up.
Note 3: Limits are guaranteed by sample testing, periodic characterization or correlation.
Note 4: Measured in still air 7 minutes after application of power. Guaranteed through correlated automatic pulse testing.
Note 5: Guaranteed through correlated automatic pulse testing at TJ = 25oC.
CALOGIC LLC, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-1076
DS048 REV A
LH0033 / LH0033C
LLC
TYPICAL PERFORMANCE CHARACTERISTICS
SUPPLY CURRENT
vs SUPPLY VOLTAGE
POWER DISSIPATION
21
SUPPLY CURRENT (±mA)
POWER DISSIPATION (W)
2.0
CASE
θJC = 60˚C/W
1.5
1.0
AMBIENT
θJA = 100˚C/W
0.5
20
TC = +125˚C
TC = +25˚C
TC = -55˚C
19
18
17
0
0
25
50
75
100
125
150
5
SUPPLY VOLTAGE (±V)
OUTPUT VOLTAGE
vs SUPPLY VOLTAGE
NEGATIVE
PULSE RESPONSE
INPUT/OUTPUT VOLTAGE (-V)
VS = ±15V
16
OUTPUT VOLTAGE (±V)
20
TEMPERATURE (˚C)
18
RL = 1kΩ
RS = 100kΩ
TC = +25˚C
14
12
10
8
6
4
5
15
10
0
RS = 50Ω
RL = 1kΩ
TC = +25˚C
-2
-4
INPUT
-6
OUTPUT
-8
-10
-12
20
0
10
50
40
8
INPUT
4
OUTPUT
2
0
35
RS = 50Ω
RL = 1kΩ
VIN = 1.0 Vrms
30
Av
1.0
0.8
20
0.6
15
10
0.4
φ
0.2
10
20
30
TIME (ns)
40
50
60
25
1.0
2.0
5.0
10.0 20.0
50
PHASE LAG (DEGREES)
VOLTAGE GAIN (V/V)
VS = ±15V
10
0
60
FREQUENCY RESPONSE
VS = ±15V
RL = 1kΩ, RS = 50Ω
TC = +25˚C
6
40
TIME (ns)
POSITIVE
PULSE RESPONSE
12
30
20
SUPPLY VOLTAGE (±V)
INPUT/OUTPUT VOLTAGE (V)
15
10
5
100
FREQUENCY (MHz)
CALOGIC LLC, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-1076
DS048 REV A
LH0033 / LH0033C
LLC
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
RISE AND FALL TIME
vs TEMPERATURE
6.0
10
VS = ±15V
RS = 50Ω
RL = 1k
INPUT BIAS CURRENT (nA)
RISE AND FALL TIME (ns)
8.0
INPUT BIAS CURRENT
vs TEMPERATURE
tf
4.0
tr
2.0
0
-50
1
VS = ±15V
0.100
VS = ±5V
0.010
0.001
0
50
100
150
0
25
50
75
100
TEMPERATURE (˚C)
TEMPERATURE (˚C)
NORMALIZED INPUT BIAS
CURRENT DURING WARM-UP
INPUT BIAS CURRENT
vs INPUT VOLTAGE
125
10
100
VS = ±15V
VS = ±15V
TA = 25˚C
INPUT BIAS CURRENT (nA)
CURRENT – NORMALIZED
TO CURRENT AT TIME = 0
VS = ±10V
10
PULSE TESTED (TJ = 25˚C)
1.0
0.1
1
0
2
4
6
8
10
TIME FROM POWER TURN-ON (MINUTES)
10 8 6 4 2 0 -2
-6
-10
INPUT VOLTAGE (V)
CALOGIC LLC, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-1076
DS048 REV A
LH0033 / LH0033C
LLC
APPLICATION INFORMATION:
Recommended Layout Precautions
where:
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
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
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)
AV = No load voltage gain, typically 0.99
(V+−V−)
= 0.005 (V+ −V−)
2
FIGURE 1. Offset Zero Adjust
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 value resistors between V+ and VC+ pins and
V – and VC– pins as illustrated in Figure 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 2. Resistor Current Limiting Using Resistor
V+
R LIM
+15V
INPUT
OFFSET
PRESET
(OPEN)
OFFSET
ADJUST
6
100
1
5
12
LH0033
C ≅ 0.1µF
12
11
OUTPUT
10
INPUT
7
5
1
11
LH0033
OUTPUT
9
9
10
200Ω
7
-15V
R LIM
6
100
C ≅ 0.1µF
V-
CALOGIC LLC, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-1076
DS048 REV A
LH0033 / LH0033C
LLC
where:
Figure 3. In Figure 3, the current sources are saturated
during normal operation, thus apply full supply voltage to the
VC pins. Under fault conditions, the voltage decreases as
required by the overload.
Vp-p = Peak-to-peak output voltage swing
f = Frequency
For Figure 5:
CL = Load Capacitance
Operation Within An Op Amp Loop
VBE 0.6V
RLIM =
=
= 10Ω
ISC 60mA
LH0033 may be used as a current booster or isolator buffer
within a closed loop with op amps such as LH0032, or
CLM4124. An isolation resistor of 47Ω should be used between
the op amp output and the input of LH0033. The wide bandwidth
and high slew rate of the LH0033 assure that the loop has the
characteristics of the op amp and that additional rolloff is not
required.
Capacitive Loading
The LH0033 is designed to drive capacitive loads such as
coaxial cables in excess of several thousand picofarads
without susceptibility to oscillation. However, peak current
resulting from (C × dV/d t ) should be limited below absolute
maximum peak current ratings for the devices.
Hardware
Thus for the LH0033:
(
In order to utilize the full drive capabilities of LH0033, it should
be mounted with a heat sink particulary for extended
temperature operation. The case is isolated from the circuit
and may be connected to the system chassis.
∆VIN
) × CL ≤ IOUT ≤ ±250mA
∆t
In addition, power dissipation resulting from driving capacitive
loads plus standby power should be kept below total package
power rating:
Design Precaution
Power supply bypassing is necessary to prevent oscillation.
Low inductance ceramic disc capacitors with the shortest
practical lead lengths must be connected from each supply
lead (within <1⁄4" to 1⁄2" of the device package) to a ground
plane. Capacitors should be one or two 0.1µF in parallel;
adding a 4.7µF solid tantalum capacitor will help troublsome
instances.
PDpkg. ≥ PDC + PAC
PDpkg. ≥ (V+–V – ) × IS + PAC
PAC ≅ (Vp-p)2 × f × CL
FIGURE 3. Current Limiting Using Current Sources
+15V
R LIM
10
Q2
12
Q1
INPUT
5
1
11
LH0033
OUTPUT
9
10
7
0.01µF
30k
6
Q3
Q1 = Q2 = 2N2905
Q3 = Q4 = 2N2219
Q4
R LIM
10
-15V
CALOGIC LLC, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-1076
DS048 REV A
LH0033 / LH0033C
LLC
TYPICAL APPLICATIONS
High Input Impedance AC Coupled Amplifier
V+
4.7pF
12
CASE
0.001µF
5
INPUT
11
LH0033
OUTPUT
9
10
7
0.1µF
6
0.1µF
Vf H ≥ 100MHz
1M
Coaxial Cable Driver
V+
C1*
12
51
INPUT
5
100
1
11
LH0033
43
9
10
6
100
50Ω
7
V*Select C1 for Optimum Pulse Response
CALOGIC LLC, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-1076
DS048 REV A
LH0033 / LH0033C
LLC
TYPICAL APPLICATIONS (Continued)
High Input Impedance Comparator with Offset Adjust
V+
VU.L.
3
V+
Instrumentation Shield/Line Driver
10
-
V+
4
12
INPUT
5
+
12
1 11
LH0033
100
LM711
9
CASE
1
10
7
51
-
INPUT
7
5
11
LH0033
9
10
6
OFFSET
ADJUST
+
7
5
V-
NO GO = LOGIC "1"
GO = LOGIC "0"
V-
VL.L.
100
6
V-
Single Supply AC Amplifier
4.5MHz Notch Filter
VCC = 12.0V
C1
150pF
12
12
CASE
1
R2
110Ω
0.001µF
5
INPUT
11
LH0033
V+
C1
150pF
VIN
5
1
9
OUTPUT
10
9
C2
300pF
10
1M
11
LH0033
7
7
6
R1
220Ω
1
2π R1C1
R1 = 2R2
6
R1
220Ω
f0 =
C1 =
C2
2
V-
CALOGIC LLC, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-1076
DS048 REV A
LH0033 / LH0033C
LLC
TYPICAL APPLICATIONS (Continued)
High Speed Sample and Hold
V+
V+
7
ANALOG
INPUT
5
12
100
1 11
LH0033
100
5
1
LH0033
9
10
6
OUTPUT
10
100
7
11
9
C1*
1000pF
6
7
VV-
*Polycarbonate or TeflonTM
LOGIC
INPUT
1
2
CALOGIC LLC, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-1076
DS048 REV A