CLC505AJP [ETC]
Current-Feedback Operational Amplifier ; 电流反馈运算放大器\n
| 型号： | CLC505AJP |
| 厂家： | 
ETC |
| 描述： | Current-Feedback Operational Amplifier
|
| 文件： | 总16页 (文件大小：461K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
January 2001
CLC505
High Speed, Programmable Supply Current, Monolithic
Op Amp
For more information, visit http://www.national.com/mil
General Description
The CLC505 is a monolithic, high speed op amp with a
Features
unique combination of high performance, low power con-
n 10mW power consumption with 50MHz BW
n Single resistor programming of supply current
n 3.4mA ICC provides 100MHz bandwidth and 14ns
settling (0.05%)
sumption, and flexibility of application. The supply current is
programmable over a 10 to 1 continuous range with a single
resistor, Rp. This feature enables the amplifier to be used in
a wide variety of high performance applications. Typical
performance at any supply current is exceptional:
n Fast disable capability
n 0.04% differential gain at ICC = 3.4mA
n 0.06% differential phase at ICC = 3.4mA
Parameter
Supply Current (ICC
)
Units
9mA
3.4mA 1mA
−3dB Bandwidth 150
100
14
50
35
MHz
nsec
Applications
Settling Time
Slew Rate
12
n Low power battery applications
n Remote site instrumentation
n Mobile communications gear
n Video switching matrix
n Phased-array radar
1700
1200 800 V/µsec
25 mA
Output Current 45
7
The CLC505’s combination of high performance, low power
consumption, and large signal performance makes the
CLC505 ideal for a wide variety of remote site equipment
applications, such as battery powered test instrumentation
and communications gear. Some other power applications
are video switching matrices, ATE, and phased-array radar
systems.
Large-Signal Pulse Response
The CLC505 has been designed for ease of use and has
been specified to ensure design confidence and final system
predictability. The product performance is specified for 1mA,
3mA ad 9mA supply current. The CLC505 is available in
8-pin Dip SOIC packages offered for the industrial tempera-
ture range.
Enhanced Solutions (Military/Aerospace)
SMD Number: contact factory
DS012755-37
Space level versions also available.
Connection Diagram
DS012755-33
Pinout
DIP & SOIC
Ordering Information
Package
Temperature Range
Part Number
Package
NSC
Industrial
Marking
Drawing
N08E
8-pin plastic DIP
−40˚C to +85˚C
−40˚C to +85˚C
CLC505AJP
CLC505AJE
CLC505AJP
CLC505AJE
8-pin plastic SOIC
M08A
© 2001 National Semiconductor Corporation
DS012755
www.national.com
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Junction Temperature
+150˚C
−40˚C to +85˚C
−65˚C to +150˚C
10 sec
Operating Temperature
Storage Temperature Range
Lead Solder Duration (+300˚C)
ESD rating (human body model)
2000V
±
7V
Supply Voltage (VCC
IOUT
)
Operating Ratings
Thermal Resistance (SOIC)
Output is short circuit protected to
ground, but maximum reliability will
be maintained if IOUT does not
exceed...
60mA
θJC
θJA
60˚C/W
±
Common Mode Input Voltage
Differential Input Voltage
VCC
10V
140˚C/W
Electrical Characteristics
±
5V, Rf = 1000Ω, Cp = 100pF; unless specified
AV = +6, VCC
=
Symbol
Parameter
Conditions
CLC505AJ
Typ
Max/Min Ratings (Note 2)
Units
Ambient Temperature
Frequency Domain Response
+25˚C
−40˚C
+25˚C
+85˚C
<
>
>
>
>
>
>
80
SSBW
LSBW
-3dB Bandwidth
-3dB Large Signal
Gain Flatness
Peaking
VOUT 2VPP
150
135
115
115
100
MHz
MHz
<
VOUT 5VPP
95
95
<
VOUT 2VPP
<
>
<
<
<
<
<
<
<
<
<
<
<
<
<
GFPL
GFPH
GFR
25/20/10MHz (Note 7)
25/20/10MHz (Note 7)
50/40/20MHz (Note 7)
0
0.4
0.6
1.0
1.0
0.3
0.5
1.0
1.0
0.4
0.6
1.3
1.2
dB
dB
Peaking
0
Rolloff
0.2
0.6
dB
LPD
Linear Phase Deviation
DC to 50/40/20MHz (Note 7)
deg
Time Domain Response
<
<
<
<
<
<
<
<
<
TRS
TRL
TSP
Rise and Fall Time
2V Step
5V Step
2V Step
2.3
2.6
12
3.0
3.7
3.0
3.7
3.5
4.4
ns
ns
ns
Settling time to 0.1/0.05/0.05%
(Note 7)
16
16
16
<
<
<
OS
SR
Overshoot
2V Step
5
15
12
15
%
>
>
>
1200
Slew Rate (AV +2)
1700
1000
1200
V/µs
Distortion And Noise Response
<
<
<
<
<
<
HD2
HD3
2nd Harmonic Distortion
3rd Harmonic Distortion
Equivalent Input Noise
Noise Floor
2VPP,20/10/5MHz (Note 7)
2VPP,20/10/5MHz (Note 7)
−50
−65
−40
−55
−45
−55
−45
−55
dBc
dBc
>
<
<
<
−153
SNF
INV
1MHz
−156
50
−154
−154
dBm
(1Hz)
<
<
<
70
Integrated Noise
1MHz to 200/200/100MHz
(Note 7)
65
65
µV
DG
DP
Differential Gain (Note 6)
Differential Phase (Note 6)
0.04
0.06
-
-
-
-
-
-
%
deg
Static, DC Performance
<
<
<
<
<
<
±
±
±
VIO
Input Offset Voltage (Note 3)
2
12.8
8.0
14
50
mV
<
±
±
DVIO
Average Temperature
Coefficient
30
50
-
µV/˚C
<
<
<
±
±
-
±
IBN
Input Bias Current (Note 3)
Non Inverting
Inverting
8
36
18
38
18
µA
<
±
100
±
DIBN
Average Temperature
Coefficient
80
225
nA/˚C
<
<
<
±
40
<
±
125
±
±
-
IBI
Input Bias Current (Note 3)
10
80
60
µA
±
DIBI
Average Temperature
Coefficient
275
nA/˚C
>
>
>
>
>
>
PSRR
CMRR
Power Supply Rejection Ratio
Common Mode Rejection Ratio
50
50
45
45
48
45
45
dB
dB
48
www.national.com
2
Electrical Characteristics (Continued)
±
5V, Rf = 1000Ω, Cp = 100pF; unless specified
AV = +6, VCC
=
Symbol
Parameter
Conditions
Typ
9
Max/Min Ratings (Note 2)
Units
mA
Static, DC Performance
<
<
<
12
ICC
Supply Current (Note 3)
No Load, Quiescent
11
11
Miscellaneous Performance
>
<
>
<
>
1600
<
2
<
0.2
RIN
CIN
RO
Non-Inverting Input
Resistance
1200
1
400
800
kΩ
pF
ohm
V
<
<
Capacitance
At DC
2
2
Output Impedence
0.2
1.2
0.3
>
>
>
>
±
±
±
±
±
VO
Output Voltage Range
Common Mode Input Range
Output Current
No Load
3.3
2.2
2.8
1.5
3.0
1.8
3.0
2.0
>
>
±
±
±
CMIR
IO
For Rated Performance
−40˚C to +85˚C
V
>
>
>
±
±
±
±
36
45
20
36
mA
Electrical Characteristics
±
AV = +6, VCC
=
5V, Rf = 1000Ω, CP = 100pF; unless specified
SUPPLY CURRENT ICC (TYP) = 3.4mA
SUPPLY CURRENT ICC (TYP) = 1mA
Rp =100kΩ, RL = 500Ω
Rp = 300kΩ, RL =1000Ω
Symbol
Typ
+25˚C
100
80
Max & Min Ratings
Typ
Max & Min Ratings
Units
−40˚C
+25˚C
+85˚C
+25˚C
50
−40˚C
+25˚C
+85˚C
>
>
>
>
>
>
>
>
>
>
>
SSBW
LSBW
GFPL
GFPH
GFR
LPD
TRS
TRL
80
50
80
50
65
40
30
35
20
30
18
MHz
MHz
dB
33
–1
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
0
0.3
0.5
1.0
1.0
4.4
7.0
0.2
0.4
1.0
1.0
4.4
7.0
0.3
0.5
1.3
1.2
5.4
8.8
0
0.2
0.3
1.0
0.5
0.1
0.2
1.0
0.5
0.2
0.3
1.3
1.0
0
0
dB
0.2
0.5
3.5
4.4
14
0.5
0.2
7
dB
deg
ns
<
<
<
<
<
<
<
12
10
18
60
12
20
60
9
–1
ns
<
<
<
<
<
<
<
TSP
OS
22
12
22
10
22
12
35
70
ns
<
<
<
8
2
0
8
5
%
>
<
<
>
<
<
>
<
<
>
<
<
>
<
<
>
<
<
SR
1200
−55
−65
−155
700
−40
−55
800
−45
−55
800
−45
−55
800
−55
−65
−152
500
−40
−55
600
−45
−55
600
−45
−55
V/µs
dBc
dBc
HD2
HD3
SNF
<
<
<
<
<
<
−149
−153
−153
−152
−150
−150
dBm
(1Hz)
<
<
<
<
<
<
80
INV
DG
56
0.04
0.06
3
70
70
80
55
0.1
0.1
3
70
70
µV
%
–
–
–
–
–
–
DP
–
–
–
–
–
–
deg
mV
µV/˚C
µA
<
<
<
<
<
<
<
<
<
±
14.5
<
±
75
<
±
2.5
<
±
30
<
±
8.0
<
±
35
>
45
>
45
±
±
±
±
±
±
VIO
11.8
7.0
13
60
13.0
7.0
<
<
±
±
DVIO
IBN
40
60
12
75
22
–
±
–
50
1
75
–
<
<
<
<
<
<
±
±
±
±
±
±
2
6
6
5.0
2.5
<
<
<
<
±
±
±
±
DIBN
IBI
30
50
15
60
10
2
32
–
nA/˚C
µA
<
<
±
±
±
4
14
10.0
7.0
<
<
±
±
DIBI
PSRR
CMRR
ICC
40
100
–
20
50
50
1.0
7500
1
38
–
nA/˚C
dB
>
>
>
>
>
>
>
>
>
>
50
45
48
48
45
45
48
48
50
45
45
45
dB
<
<
<
<
<
<
1.4
>
10000
<
2
3.4
3000
1
3.8
3.8
4.2
1.4
1.3
mA
kΩ
>
>
>
>
>
RIN
1000
2000
4000
2500
5000
<
<
<
<
<
CIN
2
2
2
2
2
pF
<
<
<
<
<
<
0.5
RO
0.2
1.6
0.5
0.2
0.5
3.0
1.0
Ω
>
>
>
>
>
>
>
>
>
>
>
±
>
±
±
±
±
±
±
±
±
±
±
VO
3.3
2.2
2.8
1.5
2.7
1.8
3.0
2.0
3.3
2.2
2.5
1.5
3.0
1.8
3.0
2.0
V
±
±
±
±
±
CMIR
V
3
www.national.com
Electrical Characteristics (Continued)
±
5V, Rf = 1000Ω, CP = 100pF; unless specified
AV = +6, VCC
=
SUPPLY CURRENT ICC (TYP) = 3.4mA
SUPPLY CURRENT ICC (TYP) = 1mA
Rp =100kΩ, RL = 500Ω
Rp = 300kΩ, RL =1000Ω
>
>
>
>
>
>
>
>
>
>
>
>
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
IO
IO
25
25
10
18
18
18
18
7
7
3.0
2.5
5
5
5
5
mA
mA
±
9
Note 1: “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. They are not meant to imply that the devices
should be operated at these limits. The table of “Electrical Characteristics” specifies conditions of device operation.
Note 2: Max/min ratings are based on product characterization and simulation. Individual parameters are tested as noted. Outgoing quality levels are determined
from tested parameters.
@
@
I
CC
Note 3: AJ-level: spec. is 100% tested at +25˚C = 3.4mA & parameter is 100% 25˚C in die form
= 1mA, 3.4mA and 9mA.
Note 4: Not applicable due to output current limitations.
Note 5: See Text on the back page of data sheet.
Note 6: Differential gain and phase is characterized with a 1V equivalent video signal, 0-100 IRE , 40IRE , and 0IRE = 0V at the load resistor and 3.58 MHz.
PP
PP
pp
Note 7: xx/yy/zz MHz indicates that the CLC505 is specified at xxMHz for I
= 9mA, yyMHz for I = 3.4mA, and zzMHz for I = 1 mA.
cc cc
CC
Conditions are different for the three supply currents:
ICC
9mA
RL
ROUT
AV
+2
+6
+6
75Ω
75Ω
0Ω
3.4mA
1mA
500Ω
1000Ω
0Ω
±
Typical Performance Characteristics (TA = 25˚C, AV = +6, VCC
=
5V, Rf = 1000Ω, VH = +3V, Cp =
100pF)
ICC 9mA, RL 250Ω
ICC 3.4mA, RL 500Ω
Non-Inverting Gain Circuit
Non-Inverting Gain Circuit
DS012755-1
DS012755-2
www.national.com
4
±
5V, Rf = 1000Ω, VH = +3V, Cp
Typical Performance Characteristics (TA = 25˚C, AV = +6, VCC
=
= 100pF)) (Continued)
ICC 1mA, RL 1000Ω
Inverting Frequency Response
Non-Inverting Gain Circuit
DS012755-4
DS012755-3
Inverting Frequency Response
Inverting Frequency Response
DS012755-5
DS012755-6
Large Signal Frequency Response
Large Signal Frequency Response
DS012755-7
DS012755-8
5
www.national.com
±
Typical Performance Characteristics (TA = 25˚C, AV = +6, VCC
=
5V, Rf = 1000Ω, VH = +3V, Cp
= 100pF)) (Continued)
Large Signal Frequency Response
Equivalent Input Noise
CMRR and PSRR
Equivalent Input Noise
Equivalent Input Noise
CMRR and PSRR
DS012755-9
DS012755-10
DS012755-11
DS012755-12
DS012755-13
DS012755-14
www.national.com
6
±
Typical Performance Characteristics (TA = 25˚C, AV = +6, VCC
=
5V, Rf = 1000Ω, VH = +3V, Cp
= 100pF)) (Continued)
CMRR and PSRR
ICC 9mA, RL 250Ω
2nd Harmonic Distortion
DS012755-15
DS012755-16
ICC 34mA, RL 500Ω
2nd Harmonic Distortion
ICC 1mA, RL 1000Ω
2nd Harmonic Distortion
DS012755-17
DS012755-18
3rd Harmonic Distortion
3rd Harmonic Distortion
DS012755-19
DS012755-20
7
www.national.com
±
5V, Rf = 1000Ω, VH = +3V, Cp
Typical Performance Characteristics (TA = 25˚C, AV = +6, VCC
=
= 100pF)) (Continued)
3rd Harmonic Distortion
Bandwidth vs. Load Capacitance
DS012755-22
DS012755-21
Bandwidth vs. Load Capacitance
Bandwidth vs. Load Capacitance
DS012755-23
DS012755-24
Recommended RS vs. Load Capacitance
Recommended RS vs. Load Capacitance
DS012755-25
DS012755-26
www.national.com
8
±
Typical Performance Characteristics (TA = 25˚C, AV = +6, VCC
=
5V, Rf = 1000Ω, VH = +3V, Cp
= 100pF)) (Continued)
Recommended RS vs. Load Capacitance
Settling Time
DS012755-27
DS012755-28
Settling Time
Settling Time
DS012755-29
DS012755-30
ICC 9mA, RL 250Ω
Small-Signal Pulse Response
ICC 34mA, RL 500Ω
Small-Signal Pulse Response
DS012755-34
DS012755-35
9
www.national.com
±
Typical Performance Characteristics (TA = 25˚C, AV = +6, VCC
=
5V, Rf = 1000Ω, VH = +3V, Cp
= 100pF)) (Continued)
ICC 1mA, RL 1000Ω
Small-Signal Pulse Response
Large-Signal Pulse Response
DS012755-37
DS012755-36
Large-Signal Pulse Response
Large-Signal Pulse Response
DS012755-38
DS012755-39
I
vs. RP
I
vs. IP
CC
CC
DS012755-40
DS012755-41
www.national.com
10
±
5V, Rf = 1000Ω, VH = +3V, Cp
Typical Performance Characteristics (TA = 25˚C, AV = +6, VCC
=
= 100pF)) (Continued)
Bandwidth vs. ICC
Maximum Output Current vs. ICC
DS012755-42
DS012755-43
Offset Voltage vs. ICC
Slew Rate vs. ICC
DS012755-45
DS012755-44
Non-Inverting Bias Current vs. ICC
Inverting Bias Current vs. ICC
DS012755-46
DS012755-47
11
www.national.com
±
Typical Performance Characteristics (TA = 25˚C, AV = +6, VCC
=
5V, Rf = 1000Ω, VH = +3V, Cp
= 100pF)) (Continued)
Differential Gain and Phase vs. Load
DS012755-48
Application Information
DS012755-32
FIGURE 2. Recommended Inverting Gain Circuit
Description
The CLC505 is
current-feedback operational amplifier. Supply current and
consequently dynamic performance can be easily adjusted
by selecting the value of a single external resistor (Rp).
DS012755-31
a
programmable-supply current,
FIGURE 1. Recommended Non-Inverting Gain Circuit
www.national.com
12
Rp is connected from pin 8 to −VCC and VCC=+/−3V. Now
calculate Rp under new conditions:
Application Information (Continued)
Selecting an Operating Point
Rp=[(+VCC−1.6V)−(−VCC)]/Ip
Rp=[(+3V−1.6V)−(−3V)]/26µA
Rp=169kΩ
The operating point is determined by the supply current,
which in turn is determined by current (Ip) flowing out of pin
8. As the supply current is reduced the following effects will
be observed:
The CLC505 will have performance similar to Rp = 300kΩ
shown on the datasheet, but with 40% less power dissipation
due to the reduced supply voltages. (The op amp will also
have a more restricted common-mode range and output
swing.) This calculation is approximate and a prudent design
would include substantial performance margin for max/min
limits.
Effect as ICC
Specification
Bandwidth
Decreases
Decreases
increases
Rise TIme
Output Drive
Input Bias Current
Input Impedance
Decreases
Decreases
Dynamic Shutdown Capability
The CLC505 may be powered on and off very quickly by
controlling the voltage applied to Rp. If Rp is connected
between pin 8 and the output of a CMOS gate powered from
Increases (see
source impedance
discussion)
±
5V supplies, the gate can be used to turn the amplifier on
and off. This is shown in Figure 3 below:
Both the specification pages and the plot pages illustrate
these effects to help make the supply current vs. perfor-
mance tradeoff. Performance is specified and tested at ICC
=1mA, 3.4mA, and 9mA as indicated in the datasheet. (Note
some test conditions and especially the load resistance are
different for the three supply current settlings.) The perfor-
mance plots show typical performance for all three supply
currents levels.
DS012755-49
When making the supply current vs. performance tradeoff, it
is first a good idea to see if one of the standard operating
points (ICC = 9mA, 3.4mA, or 1mA) fits the application. If it
does, performance guaranteed on the specification pages
will apply directly to your application. In addition, the value of
Rp may be obtained directly from the specification page.
FIGURE 3. Dynamic Control of Power Consumption
When the gate output is switched from high to low, the
CLC505 will turn on. In the off state, the supply current
typically reduces to 0.2mA or less. The speed with which the
CLC505 turns on or off is limited by the capacitance at pin 8.
To improve switching time, a speed up capacitor from the
gate output to pin 8 is recommended. The value of this
capacitor will depend on the total capacitance connected to
pin 8 and is best established experimentally. Turn-on and
turn-off times of 100ns to 200ns are achievable with ordinary
CMOS gates.
The following discussion will assist in selecting ICC for
applications that cannot operate at one of the specified
supply current settlings.
Use the typical performance plots for critical specifications to
select the best ICC. Now interpolate between the values of
ICC in the plots & specification tables to estimate the
max/min values in the application.
Example:
From the selected value of ICC the “programming current”
(Ip) may be easily calculated:
An open collector logic device is used to dynamically control
the power dissipation of the circuit. Here, the desired con-
nection for Rp is from pin 8 to the open collector logic device.
IP=ICC/39
The plot of ICC vs Ip in the plot pages shows this relationship
graphically. Knowing Ip leads to a direct calculation of Rp.
Rp= [(+VPP−1.6)−Vn]/ Ip
Rp=8.4/Ip (for +VCC=+5V and Vn =−5V)
Vn is the voltage externally applied to Rp. (Throughout the
data sheet and in most applications, Vn and −VCC are −5V.)
The term (+VCC−1.6V) is the voltage at pin 8.
DS012755-50
Now standard VCC, VEE and Rp does not have to be con-
nected to −VCC. In applications where non-standard supply
voltages are used or when there is a need to power down the
op amp via digital logic control. The value of Rp is adjusted
accordingly.
FIGURE 4. Controlling Power on State with TTL Logic
When the logic gate goes low, the CLC505 is turned on.
Performance desired is that given for ICC = 3.4mA under
standard conditions. From the ICC vs. Ip plot, Ip = 84µA. Then
calculating Rp:
First, an operating point needs to be determined from the
plots & specifications as discussed above. From this, Ip is
obtained. Ip, in concert with the available Vn determines Rp.
Rp=[(+VCC−1.6V)−(V n)]/Ip
Rp=[(+5V−1.6V)−(0)]84µA
Rp=40kΩ
Example
±
3V and performance in
An application requires that VCC
=
the 1mA operating point range. The required Ip can therefore
be determined as follows:
Ip=26µA
13
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At ICC = 1mA and ICC = 3.4mA, the CLC505 is less capable
of driving a 150Ω load due to output current limitations. For
this reason lighter loads are used and the termination resis-
tor is omitted. The gain and load resistance for ICC = 3.4mA
are AV = +6 and RL = 500Ω and for ICC = 1mA; AV = +6 and
RL = 1kΩ.
Application Information (Continued)
Slew Rate
The rapid turn on and off ability of the CLC505 is not recom-
mended for signal isolation applications (such as multiplex-
ing). While the power dissipation of the amplifier drops in the
off state, the amplifier may still have some gain at low
frequencies. Causing feed through in multiplex application.
Source Impedance
For best results, source impedance in the non-inverting cir-
cuit configuration (see Figure 1) should be kept below 5kΩ.
Above 5kΩ it is possible for oscillation to occur, depending
on other circuit board parasitics. For high signal source
impedances, a resistor with a value of less than 5kΩ may be
used to terminate the non-inverting input to ground.
The performance desired is that given for ICC = 3.4mA under
standard conditions. From the ICC vs. Ip plot, Ip=84µA. Is
obtained now calculating Rp:
Slew rate limiting is a nonlinear response which occurs in
amplifiers when the output voltage swing cannot change as
rapidly as the applied input signal. The CLC505 has been
designed to avoid slew rate limiting in most circuit configu-
Feedback Resistor
In current-feedback op amps, the value of the feedback
resistor plays a major role in determining amplifier dynamics.
It is important to select the correct value. The CLC505
provides optimum performance with a 1kΩ feedback resistor.
Selection of an incorrect value can lead to severe rolloff in
frequency response, (if the resistor value is too large) or
peaking or oscillation, (if the value is too low.)
rations. The large signal (5VPP) bandwidth of 80MHz at ICC
=
3.4mA, is only slightly less than the 100MHz small signal
bandwidth. The result is a low distortion, linear system for
both small and large signals over the required system fre-
quency range.
The CLC505 reaches slew rate limits only for small
non-inverting gains. In other words, slew rate limiting is
constrained by common mode voltage swings at the input.
The large signal frequency response plot at a gain of +2 was
a break in the response, which indicates that a slew rate limit
has been reached. Note also that the frequency response
plots at a gain of +21 for large and small signal responses
are nearly identical.
Printed Circuit Layout
As with any high frequency device, a good PCB layout will
enhance performance. Ground plane construction and good
power supply bypassing close to the package are critical to
achieving full performance. In the non-inverting configura-
tion, the amplifier is sensitive to stray capacitance to ground
at the inverting input. Hence, the inverting node connections
should be small with minimal coupling to the ground plane.
Shunt capacitance across the feedback resistor should not
be used to compensate for this effect.
Differential Gain and Phase
Differential gain and phase are measurements useful prima-
rily in composite video channels. They are measured by
monitoring the gain and phase changes of a high frequency
carrier (3.58MHz typically) as the output of the amplifier is
swept over a range of DC voltages.
Precision buffed resistors (PRP8351 series from Precision
Resistive Products) with low parasitic reactances were used
to develop the data sheet specifications. Precision carbon
composition resistors will also yield excellent results. Stan-
dard spirally-trimmed RN55D metal film resistors will work
with a slight decrease in bandwidth due to their reactive
nature at high frequencies.
Specifications for the CLC505 include differential gain and
phase. Test signals based on a 1VPP video level. Test con-
ditions used are the following:
DC sweep range: 0 to 100 IRE units (black to white)
Carrier: 3.58MHz at 40 IRE units peak to peak
Evaluation PC boards (part number 730013 for through-hole
and 730027 for SOIC) for the CLC505 are available.
The amplifier conditions are significantly different for the
three values of supply current specified. At ICC = 9mA, the
amplifier is specified for a gain of +2 and 150Ω load (for a
backmatched 75Ω system). IRE amplitudes at ICC = 9mA,
are referred to the 75Ω load resistor.
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14
Physical Dimensions inches (millimeters) unless otherwise noted
8-Pin SOIC
NS Package Number M08A
8-Pin MDIP
NS Package Number N08E
15
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Notes
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COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or
systems which, (a) are intended for surgical implant
into the body, or (b) support or sustain life, and
whose failure to perform when properly used in
accordance with instructions for use provided in the
labeling, can be reasonably expected to result in a
significant injury to the user.
2. A critical component is any component of a life
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can be reasonably expected to cause the failure of
the life support device or system, or to affect its
safety or effectiveness.
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Corporation
Americas
Tel: 1-800-272-9959
Fax: 1-800-737-7018
Email: support@nsc.com
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