データシートサーチシステム
  Japanese  ▼
ALLDATASHEET.JP

X  

ISL28291 データシート(PDF) 9 Page - Intersil Corporation

部品番号 ISL28291
部品情報  Single and Dual Ultra-Low Noise, Rail-to-Rail, Op Amp
Download  14 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
メーカー  INTERSIL [Intersil Corporation]
ホームページ  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

ISL28291 データシート(HTML) 9 Page - Intersil Corporation

Back Button ISL28291 Datasheet HTML 5Page - Intersil Corporation ISL28291 Datasheet HTML 6Page - Intersil Corporation ISL28291 Datasheet HTML 7Page - Intersil Corporation ISL28291 Datasheet HTML 8Page - Intersil Corporation ISL28291 Datasheet HTML 9Page - Intersil Corporation ISL28291 Datasheet HTML 10Page - Intersil Corporation ISL28291 Datasheet HTML 11Page - Intersil Corporation ISL28291 Datasheet HTML 12Page - Intersil Corporation ISL28291 Datasheet HTML 13Page - Intersil Corporation Next Button
Zoom Inzoom in Zoom Outzoom out
 9 / 14 page
background image
9
FN6156.2
Applications Information
Product Description
The ISL28191 and ISL28291 are voltage feedback operational
amplifier designed for communication and imaging applications
requiring very low voltage and current noise. Both parts feature
low distortion while drawing moderately low supply current. The
ISL28191 and ISL28291 use a classical voltage-feedback
topology which allows them to be used in a variety of
applications where current-feedback amplifiers are not
appropriate because of restrictions placed upon the feedback
element used with the amplifier.
Enable/Power-Down
The ISL28191 and ISL28291 amplifiers are disabled by
applying a voltage greater than 2V to the ENABLE pin, with
respect to the V- pin. In this condition, the output(s) will be in
a high impedance state and the amplifier(s) current will be
reduced to 13µA/Amp. By disabling the part, multiple parts
can be connected together as a MUX. The outputs are tied
together in parallel and a channel can be selected by the
ENABLE pin. The ENABLE pin also has an internal pull
down. If left open, the ENABLE pin will pull to the negative
rail and the device will be enabled by default.
Input Protection
All input terminals have internal ESD protection diodes to both
positive and negative supply rails, limiting the input voltage to
within one diode beyond the supply rails. Both parts have
additional back-to-back diodes across the input terminals (as
shown in Figure 25). In pulse applications where the input
Slew Rate exceeds the Slew Rate of the amplifier, the
possibility exists for the input protection diodes to become
forward biased. This can cause excessive input current and
distortion at the outputs. If overdriving the inputs is necessary,
the external input current must never exceed 5mA. An
external series resistor may be used to limit the current as
shown in Figure 25.
Using Only One Channel
The ISL28291 is a Dual channel op-amp. If the application
only requires one channel when using the ISL28291, the
user must configure the unused channel to prevent it from
oscillating. Oscillation can occur if the input and output pins
are floating. This will result in higher than expected supply
currents and possible noise injection into the channel being
used. The proper way to prevent this oscillation is to short
the output to the negative input and ground the positive input
(as shown in Figure 26).
Current Limiting
The ISL28191 and ISL28291 have no internal current-
limiting circuitry. If the output is shorted, it is possible to
exceed the Absolute Maximum Rating for output current or
power dissipation, potentially resulting in the destruction of
the device. This is why output short circuit current is
specified and tested with RL = 10Ω.
Power Dissipation
It is possible to exceed the +125°C maximum junction
temperatures under certain load and power-supply
conditions. It is therefore important to calculate the
maximum junction temperature (TJMAX) for all applications
to determine if power supply voltages, load conditions, or
package type need to be modified to remain in the safe
operating area. These parameters are related as follows:
where:
•PDMAXTOTAL is the sum of the maximum power
dissipation of each amplifier in the package (PDMAX)
•PDMAX for each amplifier can be calculated as follows:
where:
•TMAX = Maximum ambient temperature
θJA = Thermal resistance of the package
•PDMAX = Maximum power dissipation of 1 amplifier
•VS = Supply voltage
•IMAX = Maximum supply current of 1 amplifier
•VOUTMAX = Maximum output voltage swing of the
application
•RL = Load resistance
FIGURE 25. LIMITING THE INPUT CURRENT TO LESS THAN
5mA
-
+
R
FIGURE 26. PREVENTING OSCILLATIONS IN UNUSED
CHANNELS
-
+
T
JMAX
T
MAX
θ
JAxPDMAXTOTAL
()
+
=
PD
MAX
2*V
S
I
SMAX
V
S
(
- V
OUTMAX )
V
OUTMAX
R
L
----------------------------
×
+
×
=
ISL28191, ISL28291


同様の部品番号 - ISL28291

メーカー部品番号データシート部品情報
logo
Intersil Corporation
ISL28291 INTERSIL-ISL28291 Datasheet
1Mb / 16P
   Low Distortion Rail-to-Rail Output, Op Amp
ISL28291 INTERSIL-ISL28291 Datasheet
9Mb / 44P
   Providing high-performance solutions for every link in the signal chain
logo
Renesas Technology Corp
ISL28291 RENESAS-ISL28291 Datasheet
1Mb / 18P
   Single and Dual Single Supply Ultra-Low Noise, Low Distortion Rail-to-Rail Output, Op Amp
logo
Intersil Corporation
ISL28291EVAL1Z INTERSIL-ISL28291EVAL1Z Datasheet
1Mb / 16P
   Low Distortion Rail-to-Rail Output, Op Amp
logo
Renesas Technology Corp
ISL28291EVAL1Z RENESAS-ISL28291EVAL1Z Datasheet
1Mb / 18P
   Single and Dual Single Supply Ultra-Low Noise, Low Distortion Rail-to-Rail Output, Op Amp
More results

同様の説明 - ISL28291

メーカー部品番号データシート部品情報
logo
Intersil Corporation
ISL28190 INTERSIL-ISL28190 Datasheet
908Kb / 14P
   Single and Dual Ultra-Low Noise, Ultra-Low Distortion, Rail-to-Rail, Op Amp
ISL28190 INTERSIL-ISL28190_08 Datasheet
1Mb / 16P
   Single and Dual Ultra-Low Noise, Ultra-Low Distortion, Rail-to-Rail Output, Op Amp
ISL55191 INTERSIL-ISL55191 Datasheet
880Kb / 18P
   Single and Dual Ultra-Low Noise, Ultra-Low Distortion, Rail-to-Rail, Low Power Op Amp
logo
Renesas Technology Corp
ISL28190 RENESAS-ISL28190 Datasheet
1Mb / 19P
   Single and Dual Single Supply Ultra-Low Noise, Ultra-Low Distortion, Rail-to-Rail Output, Op Amp
logo
Intersil Corporation
ISL28191 INTERSIL-ISL28191_08 Datasheet
1Mb / 16P
   Single and Dual Single Supply Ultra-Low Noise, Low Distortion Rail-to-Rail Output, Op Amp
logo
Renesas Technology Corp
ISL28191 RENESAS-ISL28191 Datasheet
1Mb / 18P
   Single and Dual Single Supply Ultra-Low Noise, Low Distortion Rail-to-Rail Output, Op Amp
ISL28290 RENESAS-ISL28290 Datasheet
1Mb / 21P
   Dual Single Supply Ultra-Low Noise, Ultra-Low Distortion, Rail-to-Rail Output, Op Amp
Jan.12.21
ISL55191 RENESAS-ISL55191 Datasheet
1Mb / 18P
   Single and Dual Ultra-Low Noise, Ultra-Low Distortion, Rail-to-Rail, Low Power Op
March 30, 2007
logo
Linear Technology
LTC6244 LINER-LTC6244 Datasheet
455Kb / 24P
   Dual 50MHz, Low Noise, Rail-to-Rail, CMOS Op Amp
LTC6244 LINER-LTC6244_15 Datasheet
364Kb / 26P
   Dual 50MHz, Low Noise, Rail-to-Rail, CMOS Op Amp
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14


データシート ダウンロード

Go To PDF Page


リンク URL




プライバシーポリシー
ALLDATASHEET.JP
ALLDATASHEETはお客様のビジネスに役立ちますか?  [ DONATE ] 

Alldatasheetは   |   広告   |   お問い合わせ   |   プライバシーポリシー   |   リンク交換   |   メーカーリスト
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com