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參數(shù)資料
| 型號： | OPA642NB-3K |
| 元件分類： | 運算放大器 |
| 英文描述： | Voltage-Feedback Operational Amplifier |
| 中文描述： | 電壓反饋運算放大器 |
| 文件頁數(shù)： | 2/4頁 |
| 文件大?。?/td> | 59K |
| 代理商： | OPA642NB-3K |
2
DEM-OPA68xU
PART
DESCRIPTION
C
1
, C
2
Tantalum Chip Capacitor, SMD EIA size 3528, 20V
C
3
- C
7
Multi-Layer Ceramic Chip Cap., SMD 1206, 50V
J
1
- J
4
SMA or SMB Board Jack (Amphenol 901-144-8)
L
1
, L
2
EMI-Suppression Ferrite Chip, SMD 1206
(Steward LI 1206 B 900 R)
P
1
Terminal Block, 3.5mm centers
(On-Shore Technology ED555/3DS)
R
1
- R
13
Metal Film Chip Resistor, SMD 1206, 1/8W
TABLE II. Component Descriptions.
R
1
and R
7
set the I/O impedance, R
2
- R
6
set the gain, and C
1
- C
5
are supply bypass capacitors. C
3
is optional; it adds a
bypass between the supplies, which improves distortion
performance for some models. L
1
and L
2
are ferrite chips
that can reduce interactions with the power supply at high
frequencies. If not desired, they can be replaced with 0
resistors. R
8
- R
13
, C
6
and C
7
are optional components that
support op amps with special functions (see Table I).
For single supply operation, do not connect L
2
; otherwise,
the –V
S
input to P
1
would be at ground potential.
Standard Current-Feedback Op Amps
—These op amps
have the pinout shown in Figure 1. Table III shows typical
values used for these parts. To select component values for
your op amp (especially R
6
), consult its data sheet.
DUAL SUPPLY
(G = +2)
DUAL SUPPLY
(G = –1)
SINGLE SUPPLY
(G = +1)
COMPONENT
R
1
R
2
3
R
4
R
5
R
6
R
7
49.9
10.0
Open
Open
402
402
49.9
Open
2.2
μ
F
2.2
μ
F
0.01
μ
F
0.1
μ
F
0.1
μ
F
Open
57.6
Open
10.0
402
Open
402
49.9
Open
2.2
μ
F
2.2
μ
F
0.01
μ
F
0.1
μ
F
0.1
μ
F
Open
49.9
10.0
Open
Open
Open
402
49.9
Open
2.2
μ
F
Open
Open
0
0.1
μ
F
Open
R
8
- R
13
C
1
C
2
C
3
C
4
C
5
C
6
, C
7
NOTE: The values and gains shown will not work for all current-feedback op
amps. See the data sheet to select proper values. The I/O impedances are 50
.
TABLE III. Standard Current-Feedback Op Amps.
DUAL SUPPLY
(G = +2)
DUAL SUPPLY
(G = –1)
SINGLE SUPPLY
(G = +1)
COMPONENT
R
1
R
2
R
3
R
4
R
5
R
6
R
7
49.9
178
Open
Open
402
402
49.9
Open
2.2
μ
F
2.2
μ
F
0.01
μ
F
0.1
μ
F
0.1
μ
F
Open
57.6
Open
210
402
Open
402
49.9
Open
2.2
μ
F
2.2
μ
F
0.01
μ
F
0.1
μ
F
0.1
μ
F
Open
49.9
0
Open
Open
Open
24.9
49.9
Open
2.2
μ
F
Open
Open
0
0.1
μ
F
Open
R
8
- R
13
C
1
C
2
C
3
C
4
C
5
C
6
, C
7
NOTE: The values and gains shown will not work for all voltage-feedback op
amps. See the individual op amp data sheet to select proper values. The I/O
impedances are 50
.
TABLE IV. Standard Voltage-Feedback Op Amps.
TABLE V. OPA628U and OPA64xU Changes.
DUAL SUPPLY
(G = )+2
DUAL SUPPLY
(G = –1)
SINGLE SUPPLY
(G = +1)
COMPONENT
R
8
,
R
11
C
1
C
2
C
4
,
C
6
C
5
,
C
7
0
4.7
μ
F
4.7
μ
F
0.1
μ
F
0.1
μ
F
0
4.7
μ
F
4.7
μ
F
0.1
μ
F
0.1
μ
F
0
4.7
μ
F
Open
0
0.1
μ
F
OPA63xU
—Pin 8 disables the output when high (OPA632
and OPA635). Table VII shows different ways to set up pin
8’s voltage using R
8
, R
9
and C
7
. Use Table IV for the other
components, except for the changes shown in Table VI; note
these are all single supply configurations.
SINGLE SUPPLY SINGLE SUPPLY SINGLE SUPPLY
(G = +2)
(G = –1)
COMPONENT
(G = +1)
C
4
0
0
0
TABLE VI. OPA63xU Changes.
Standard Voltage-Feedback Op Amps
—These op amps
have the pinout shown in Figure 1. Table IV shows typical
values used for these parts. To select component values for
your op amp, consult its data sheet.
OPA628U and OPA64xU
—These op amps have additional
supply pins (see Table I) to improve distortion. Use the
values in Table IV, except for the changes shown in Table
V (the OPA64xP family will function without these changes,
but with reduced distortion performance).
CONFIGURATION
R
8
C
9
External Source
On
Off
Open
Open
0
49.9
0
Open
CONFIGURATION
R
8
R
9
C
7
External Source
On
Off
Open
Open
Open
49.9
Open
0
Open
0.1
μ
F
Open
TABLE VII. Disable Pin—OPA632U and OPA635U.
TABLE VIII. Disable Pin—OPA68xU.
OPA680U
—Pin 8 disables the output when low. Table VIII
shows different ways to set up pin 8’s voltage using R
8
, R
9
and C
7
. Use Table IV for the other components.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| OPA63xU | EVALUATION FIXTURE |
| OPA643N-250 | Voltage-Feedback Operational Amplifier |
| OPA643N-3K | Voltage-Feedback Operational Amplifier |
| OPA643NB-250 | 2K, 256 X 8 SERIAL EE, -40C to +85C, 8-DFN, T/R |
| OPA643NB-3K | 2K SEEPROM Addressable Memory Device, -40C to +85C, 8-MSOP, T/R |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| OPA642P | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| OPA642PB | 制造商:Texas Instruments 功能描述: |
| OPA-642PB | 制造商: 功能描述: 制造商:undefined 功能描述: |
| OPA642U | 制造商:Texas Instruments 功能描述:IC,OP-AMP,SINGLE,BIPOLAR,SOP,8PIN,PLASTIC |
| OPA642UB | 制造商:Texas Instruments 功能描述:Operational Amplifier, Single AMP, Bipolar, 8 Pin, Plastic, SOP |
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