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參數資料
| 型號： | 5962-9459701MPA |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 運算放大器 |
| 英文描述： | OP-AMP, CDIP8 |
| 封裝： | DIP-8 |
| 文件頁數： | 6/8頁 |
| 文件大小： | 1005K |
| 代理商： | 5962-9459701MPA |
Single-Supply Operation
The CLC426 can be operated with single power supply as
shown in fig. 7. Both the input and output are capacitively
coupled to set the dc operating point.
DAC Output Buffer
The CLC426's quick settling, wide bandwidth and low
differential input capacitance combine to form an excel-
lent I-to-V converter for current-output DACs in such
applications as reconstruction video. The circuit of fig. 8
implements a low-noise transimpedance amplifier com-
monly used to buffer high-speed current output devices.
The transimpedance gain is set by Rf. A feedback
capacitor, Cf, is needed in order to compensate for the
inductive behavior of the closed-loop frequency response
of this type of circuit. Equation 3 shows a means of
calculating the value of Cf which will provide conditions for
a maximally-flat signal frequency response with approxi-
mately 65° phase margin and 5% step-response over-
shoot. Notice that Ct is the sum of the DAC output
capacitance and the differential input capacitance of the
CLC426 which is located in its Electrical Characteristics
Table. Notice also that CLC426's gain-bandwidth product
(GBW) is also located in the same table. Equation 5
provides the resulting signal bandwidth.
C
RGBW
f
t
f
= 2
2
π
Eq. 3
CC
C
tout
in dif
=+
Eq. 4
signal bandwidth
GBW
RC
ft
=
1
22
π
Eq. 5
Sallen-Key Active Filters
The CLC426 is well suited for Sallen-Key type of active
filters. Fig. 9 shows the 2nd order Sallen-Key band-pass
filter topology and design equations.
Fig. 9
To design the band-pass, begin by choosing values for Rf
and Rg, for example RR
fg
== 200. Then choose rea-
sonable values for C1 and C2 (where C1=5C2) and then
compute R1. R2 and R3 can then be computed. For
optimum high-frequency performance it is recommended
that the resistor values fall in the range of 10
to 1k and
the capacitors be kept above 10pF. The design can
be further improved by compensating for the delay through
the op amp. For further details on this technique, please
request Application Note OA-21 from National Semicon-
ductor Corporation.
Printed Circuit Board Layout
Generally, a good high-frequency layout will keep power
supply and ground traces away from the inverting input
and output pins. Parasitic capacitances on these nodes
to ground will cause frequency-response peaking and
possible circuit oscillation, see OA-15 for more information.
National suggests the CLC730013 (through-hole) or the
CLC730027 (SOIC) evaluation board as a guide for high-
frequency layout and as an aid in device testing and
characterization.
Fig. 7
Fig. 8
CC
G
R
desired mid
band gain
R
Q
GC
f
where f
desired center frequency
R
GR
Q
G
QG
G
R
GR
Q
G
Q
f
g
21
1
2
1
22
3
1
22
2
1
5
1
2
14 8
2
1
48
2
51 4 8
2
1
4
=
=+
=
()
=
+
+
=
+
+
,
.
π
http://www.national.com
6
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相關代理商/技術參數 |
參數描述 |
|---|---|
| 5962-9459901MXA | 功能描述:NVRAM 8Kbx8 4.5-5.5V 55ns nvSRAM RoHS:否 制造商:Maxim Integrated 數據總線寬度:8 bit 存儲容量:1024 Kbit 組織:128 K x 8 接口類型:Parallel 訪問時間:70 ns 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 工作電流:85 mA 最大工作溫度:+ 70 C 最小工作溫度:0 C 封裝 / 箱體:EDIP 封裝:Tube |
| 5962-9459901MXC | 功能描述:NVRAM 8Kbx8 4.5-5.5V 55ns nvSRAM RoHS:否 制造商:Maxim Integrated 數據總線寬度:8 bit 存儲容量:1024 Kbit 組織:128 K x 8 接口類型:Parallel 訪問時間:70 ns 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 工作電流:85 mA 最大工作溫度:+ 70 C 最小工作溫度:0 C 封裝 / 箱體:EDIP 封裝:Tube |
| 5962-9459901MXX | 制造商:Cypress Semiconductor 功能描述:NVSRAM28PIN LCC - Bulk |
| 5962-9459901MYA | 功能描述:NVRAM 8Kbx8 4.5-5.5V 55ns nvSRAM RoHS:否 制造商:Maxim Integrated 數據總線寬度:8 bit 存儲容量:1024 Kbit 組織:128 K x 8 接口類型:Parallel 訪問時間:70 ns 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 工作電流:85 mA 最大工作溫度:+ 70 C 最小工作溫度:0 C 封裝 / 箱體:EDIP 封裝:Tube |
| 5962-9459902MXA | 制造商:Cypress Semiconductor 功能描述:NVSRAM28PIN SOIC - Bulk |
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