|
|
PDF KH561 Data sheet ( Hoja de datos )
| Número de pieza | KH561 | |
| Descripción | Low Distortion Driver Amplifier | |
| Fabricantes | Cadeka | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de KH561 (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
|
No Preview Available !
KH561
Wideband, Low Distortion Driver Amplifier
www.datasheet4u.com
www.cadeka.com
Features
s 150MHz bandwidth at +24dBm output
s Low distortion
(2nd/3rd: -59/-62dBc @ 20MHz and 10dBm)
s Output short circuit protection
s User-definable output impedance, gain,
and compensation
s Internal current limiting
s Direct replacement for CLC561
Applications
s Output amplification
s Arbitrary waveform generation
s ATE systems
s Cable/line driving
s Function generators
s SAW drivers
s Flash A/D driving and testing
Frequency Response vs. Output Power
16
Po = 10dBm
14 Vo = 2Vpp
12
Po = 24dBm
Vo = 10Vpp
10 Po = 27.5dBm
Vo = 15Vpp
8
Po = 18dBm
Vo = 5Vpp
6
0 40 80 120 160 200
Frequency (MHz)
5
V+ 8
+
V- 18
5
10
15
20
-
4 +VCC
19 Compensation
23 Vo
21 -VCC
All undesignated
pins are internally
unconnected. May
be grounded if
desired.
Typical Distortion PerformancKe
Output
Power
10dBm
18dBm
24dBm
20MHz
2nd 3rd
-59 -62
-52 -48
-50 -41
50MHz
2nd 3rd
-52 -60
-45 -46
-36 -32
100MHz
2nd 3rd
-35 -49
-30 -36
-40 -30
General Description
The KH561 is a wideband DC coupled, amplifier that
combines high output drive and low distortion. At
an output of +24dBm (10Vpp into 50Ω), the -3dB
bandwidth is 150MHz. As illustrated in the table
below, distortion performance remains excellent
even when amplifying high-frequency signals to high
output power levels.
With the output current internally limited to 250mA,
the KH561 is fully protected against shorts to ground
and can, with the addition of a series limiting resistor
at the output, withstand shorts to the ±15V supplies.
The KH561 has been designed for maximum flexibility
in a wide variety of demanding applications. The
two resistors comprising the feedback network set
both the gain and the output impedance, without
requiring the series backmatch resistor needed by most
op amps. This allows driving into a matched load
without dropping half the voltage swing through a
series matching resistor. External compensation allows
user adjustment of the frequency response. The
KH561 is specified for both maximally flat frequency
response and 0% pulse overshoot compensations.
The combination of wide bandwidth, high output
power, and low distortion, coupled with gain, output
impedance and frequency response flexibility, makes
the KH561 ideal for waveform generator applications.
Excellent stability driving capacitive loads yields
superior performance driving ADC’s, long transmission
lines, and SAW devices. A companion part, the
KH560, offers superior pulse fidelity for high accuracy
DC coupled applications.
The KH561 is constructed using thin film resistor/bipolar
transistor technology, and is available in the following
versions:
KH561AI
KH561AK
KH561AM
-25°C to +85°C
-55°C to +125°C
-55°C to +125°C
24-pin Ceramic DIP
24-pin Ceramic DIP,
features burn-in
and hermetic testing
24-pin Ceramic DIP,
environmentally screened
and electronically tested
to MIL-STD-883
REV. 1A January 2004
1 page  
KH561
DATA SHEET
KH561 Typical Performance Characteristics (TA = +25°C, Circuit in Figure 1; unless specified)
Small Signal Pulse Response
Maximally Flat
1.2 Compensation
0.8
0.4
www.datasheet40 u.com
0% Overshoot
Compensation
-0.4
-0.8
-1.2
Large Signal Pulse Response
Maximally Flat
6 Compensation
4
0% Overshoot
2 Compensation
0
-2
-4
-6
Uni-Polar Pulse Response
6
Maximally Flat
Compensation
4
2
0
-2
-4
-6
Time (2ns/div)
Time (5ns/div)
Time (5ns/div)
Settling Time into 50Ω Load
5
2.0
5V Output Step
1.5
1.0
0.5
0
-0.5
-1.0
-1.5
-2.0
10-9 10-7 10-5 10-3 10-1 101
Time (sec)
Settling Time into 50pF Load
5
2.0
5V Output Step
1.5
1.0
0.5
0
-0.5
-1.0
-1.5
-2.0
10-9 10-7 10-5 10-3 10-1 101
Time (sec)
-1dB Compensation Point
34
5
33
32
Ro = 50Ω
31
Ro = 75Ω
30
29
28
27
26
25
Match Load
Re-compensated at each load
24
0 20 40 60
Frequency (MHz)
80
100
Group Delay
4.0
5
3.8
3.6
3.4
3.2
3.0
2.8
2.6
2.4
2.2
Aperture set to 5%
of span (12.8MHz)
2.0
0 50 100 150
Frequency (MHz)
200
250
5
REV. 1A January 2004
Settling Time into 500Ω Load 5
2.0
5V Output Step
1.5
1.0
0.5
0
-0.5
-1.0
-1.5
-2.0
10-9 10-7 10-5 10-3 10-1 101
Time (sec)
Output Return Loss (S22)
0
5
-5 Ro = 50Ω
-10 Rx = 0Ω
-15
-20 Ro = 40Ω
-25 Rx = 10Ω
-30
-35
-40
-45
Re-compensated
at each Rx
-50
0 50 100 150
Frequency (MHz)
200
250
Noise Figure
22
5
21
20 Ro = 100Ω
19 Ro = 75Ω
18
Ro = 50Ω
17
16
15
14
13
12
5
Ro = 25Ω
Non-inverting input impedance
matched to source impedance
10 15 20 25
No Load Gain
30
5 Gain Error Band (Worst Case, DC)5
4
Ro (nominal) = 50Ω
RL = 50Ω ± 0%
3
2
1
Rf and Rg
0 tolerance = ±0.1%
-1
-2
-3
-4
-5
5
Rf and Rg
tolerance = ±1%
9 13 17 21
No Load Gain
25
5
Reverse Transmission Gain & Phase5(S12)
0
-20
-40
-60 Gain
-80
-100 Phase
0
-45
-90
-135
-180
0 50 100 150 200 250
Frequency (MHz)
Input Return Loss (S11)
0
-10
-20
-30 Magnitude
-40
-50
Phase
Re-compensated
at each Rx
5
0
-45
-90
-135
-180
0 50 100 150 200 250
Frequency (MHz)
Equivalent Input Noise
100
5
60
40 Inverting Current 34pA/√Hz
100
60
40
20 20
10 10
66
4 Non-Inverting Current 2.8pA/√Hz 4
2
1
100
1k
PSRR
100
90
80
70
60
50
40
30
20
10
0
100
1k
Non-Inverting Voltage 2.1nV/√Hz 2
10k 100k 1M
Frequency (Hz)
1
10M 100M
5
10k 100k 1M 10M 100M
Frequency (Hz)
5
5
5 Page 
KH561
DATA SHEET
For the circuit of Figure 1, the equivalent input noise
voltage may be calculated using the data sheet spot
noises and Rs = 25Ω, RL = ∞. Recall that 4kT = 16E-21J.
All terms cast as (nV/√Hz)2
en = (2.1)2 + (.07)2 + (.632)2 + (1.22)2 + (.759)2 + (.089)2
www.datash=ee2t.46u2.cnoVm/ Hz
Gain Accuracy (DC):
A classical op amp’s gain accuracy is principally set by
the accuracy of the external resistors. The KH561
also depends on the internal characteristics of the
forward current gain and inverting input impedance. The
performance equations for Av and Ro along with the
Thevinin model of Figure 5 are the most direct way of
assessing the absolute gain accuracy. Note that internal
temperature drifts will decrease the absolute gain
slightly as the part warms up. Also note that the para-
meter tolerances affect both the signal gain and output
impedance. The gain tolerance to the load must include
both of these effects as well as any variation in the load.
The impact of each parameter shown in the performance
equations on the gain to the load (AL) is shown below.
Increasing current gain G
Increasing inverting input Ri
Increasing Rf
Increasing Rg
Increases AL
Decreases AL
lncreases AL
Decreases AL
Applications Suggestions
Driving a Capacitive Load:
The KH561 is particularly suitable for driving a capacitive
load. Unlike a classical op amp (with an inductive output
impedance), the KH561’s output impedance, while
starting out real at the programmed value, goes some-
what capacitive at higher frequencies. This yields a very
stable performance driving a capacitive load. The over-
all response is limited by the (1/RC) bandwidth set by the
KH561’s output impedance and the load capacitance. It
is therefore advantageous to set a low Ro with the
constraint that extremely low Rf values will degrade the
distortion performance. Ro = 25Ω was selected for the
data sheet plots. Note from distortion plots into a
capacitive load that the KH561 achieves better than
60dBc THD (10-bits) driving 2Vpp into a 50pF load
through 30MHz.
Improving the Output Impedance Match
vs. Frequency - Using Rx:
Using the loop gain to provide a non-zero output
impedance provides a very good impedance match at
low frequencies. As shown on the Output Return Loss
plot, however, this match degrades at higher frequencies.
Adding a small external resistor in series with the output,
Rx, as part of the output impedance (and adjusting the
programmed Ro accordingly) provides a much better
match over frequency. Figure 9 shows this approach.
Vi
Rs
+ Cx
KH561
-
Rf
Rg
R'o = Rx + Ro
Rx
Vo
RL Ro = R'o - Rx
With:
Ro = KH561 output impedance
and Ro + Rx = RL generally
Figure 9: Improving Output Impedance
Match vs. Frequency
Increasing Rx will decrease the achievable voltage swing
at the load. A minimum Rx should be used consistent
with the desired output match. As disAcussed in the
thermal analysis discussion, Rx is also very useful in
limiting the internal power under an output shorted
condition.
Interpreting the Slew Rate:
The slew rate shown in the data sheet applies to the volt-
age swing at the load for the circuit of Figure 1. Twice this
value would be required of a low output impedance
amplifier using an external matching resistor to achieve
the same slew rate at the load.
Layout Suggestions:
The fastest fine scale pulse response settling requires
careful attention to the power supply decoupling.
Generally, the larger electrolytic capacitor ground
connections should be as near the load ground (or cable
shield connection) as is reasonable, while the higher
frequency ceramic de-coupling caps should be as near
the KH561’s supply pins as possible to a low inductance
ground plane.
Evaluation Boards:
An evaluation board (showing a good high frequency lay-
out) for the KH561 is available. This board may be
ordered as part #730019.
Thermal Analysis and Protection
A thermal analysis of a chip and wire hybrid is
directed at determining the maximum junction
temperature of all the internal transistors. From the total
internal power dissipation, a case temperature may be
developed using the ambient temperature and the case
to ambient thermal impedance. Then, each of the
dominant power dissipating paths are considered to
determine which has the maximum rise above case
temperature.
The thermal model and analysis steps are shown below.
As is typical, the model is cast as an electrical model
where the temperatures are voltages, the power dissipa-
tors are current sources, and the thermal impedances
are resistances. Refer to the summary design equations
and Figure 1 for a description of terms.
REV. 1A January 2004
11
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet KH561.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| KH560 | Wideband/ Low Distortion Driver Amplifier |  Fairchild Semiconductor |
| KH560 | Low Distortion Driver Amplifier | Cadeka |
| KH561 | Wideband/ Low Distortion Driver Amplifier | Fairchild Semiconductor |
| KH561 | Low Distortion Driver Amplifier | Cadeka |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |