Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.COM

X  

Preview PDF Download HTML

OPA4277UA Datasheet(PDF) 9 Page - Burr-Brown (TI)

[Old version datasheet] Texas Instruments acquired Burr-Brown Corporation. Click here to check the latest version.
Part No. OPA4277UA
Description  High Precision OPERATIONAL AMPLIFIERS
Download  25 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  BURR-BROWN [Burr-Brown (TI)]
Direct Link  http://www.burr-brown.com
Logo BURR-BROWN - Burr-Brown (TI)

OPA4277UA Datasheet(HTML) 9 Page - Burr-Brown (TI)

Back Button OPA4277UA Datasheet HTML 5Page - Burr-Brown (TI) OPA4277UA Datasheet HTML 6Page - Burr-Brown (TI) OPA4277UA Datasheet HTML 7Page - Burr-Brown (TI) OPA4277UA Datasheet HTML 8Page - Burr-Brown (TI) OPA4277UA Datasheet HTML 9Page - Burr-Brown (TI) OPA4277UA Datasheet HTML 10Page - Burr-Brown (TI) OPA4277UA Datasheet HTML 11Page - Burr-Brown (TI) OPA4277UA Datasheet HTML 12Page - Burr-Brown (TI) OPA4277UA Datasheet HTML 13Page - Burr-Brown (TI) Next Button
Zoom Inzoom in Zoom Outzoom out
 9 / 25 page
background image
OPA277, OPA2277, OPA4277
9
SBOS079A
www.ti.com
Op Amp
(a)
OPA277
(b)
No bias current
cancellation resistor
(see text)
Conventional op amp with external bias
current cancellation resistor.
OPA277 with no external bias current
cancellation resistor.
R
2
R
1
R
2
R
1
R
B = R2 || R1
APPLICATIONS INFORMATION
The OPA277 series is unity-gain stable and free from unex-
pected output phase reversal, making it easy to use in a wide
range of applications. Applications with noisy or high imped-
ance power supplies may require decoupling capacitors
close to the device pins. In most cases 0.1
µF capacitors are
adequate.
The OPA277 series has very low offset voltage and drift. To
achieve highest performance, circuit layout and mechanical
conditions should be optimized. Offset voltage and drift can
be degraded by small thermoelectric potentials at the op amp
inputs. Connections of dissimilar metals will generate thermal
potential which can degrade the ultimate performance of the
OPA277 series. These thermal potentials can be made to
cancel by assuring that they are equal in both input terminals.
• Keep thermal mass of the connections made to the two
input terminals similar.
• Locate heat sources as far as possible from the critical
input circuitry.
• Shield op amp and input circuitry from air currents such as
cooling fans.
OPERATING VOLTAGE
OPA277 series op amp operate from
±2V to ±18V supplies
with excellent performance. Unlike most op amps which are
specified at only one supply voltage, the OPA277 series is
specified for real-world applications; a single limit applies
over the
±5V to ±15V supply range. This allows a customer
operating at VS = ±10V to have the same assured perfor-
mance as a customer using
±15V supplies. In addition, key
parameters are assured over the specified temperature range,
–40
°C to +85°C. Most behavior remains unchanged through
the full operating voltage range (
±2V to ±18V). Parameters
which vary significantly with operating voltage or temperature
are shown in typical performance curves.
OFFSET VOLTAGE ADJUSTMENT
The OPA277 series is laser-trimmed for very low offset
voltage and drift so most circuits will not require external
adjustment. However, offset voltage trim connections are
provided on pins 1 and 8. Offset voltage can be adjusted by
connecting a potentiometer as shown in Figure 1. This
adjustment should be used only to null the offset of the op
amp. This adjustment should not be used to compensate for
offsets created elsewhere in a system since this can intro-
duce additional temperature drift.
INPUT PROTECTION
The inputs of the OPA277 series are protected with 1k
series input resistors and diode clamps. The inputs can
withstand
±30V differential inputs without damage. The pro-
tection diodes will, of course, conduct current when the
inputs are over-driven. This may disturb the slewing behavior
of unity-gain follower applications, but will not damage the op
amp.
INPUT BIAS CURRENT CANCELLATION
The input stage base current of the OPA277 series is
internally compensated with an equal and opposite cancella-
tion circuit. The resulting input bias current is the difference
between the input stage base current and the cancellation
current. This residual input bias current can be positive or
negative.
When the bias current is canceled in this manner, the input
bias current and input offset current are approximately the
same magnitude. As a result, it is not necessary to use a bias
current cancellation resistor as is often done with other op
amps (Figure 2). A resistor added to cancel input bias current
errors may actually increase offset voltage and noise.
FIGURE 2. Input Bias Current Cancellation.
V+
V–
20k
OPA277 single op amp only.
Use offset adjust pins only to null
offset voltage of op amp—see text.
Trim Range: Exceeds
Offset Voltage Specification
OPA277
6
7
8
4
3
2
1
0.1µF
0.1µF
FIGURE 1. OPA277 Offset Voltage Trim Circuit.


Similar Part No. - OPA4277UA

ManufacturerPart No.DatasheetDescription
Texas Instruments
Texas Instruments
OPA4277UA TI-OPA4277UA Datasheet
1Mb / 26P
[Old version datasheet]   High Precision OPERATIONAL AMPLIFIERS
More results

Similar Description - OPA4277UA

ManufacturerPart No.DatasheetDescription
Burr-Brown (TI)
Burr-Brown (TI)
OPA277 BURR-BROWN-OPA277 Datasheet
346Kb / 9P
   High Precision OPERATIONAL AMPLIFIERS
Texas Instruments
Texas Instruments
OPA277U TI-OPA277U Datasheet
1Mb / 26P
[Old version datasheet]   High Precision OPERATIONAL AMPLIFIERS
OPA277UA2K5 TI1-OPA277UA2K5 Datasheet
1Mb / 27P
[Old version datasheet]   High Precision OPERATIONAL AMPLIFIERS
Motorola, Inc
Motorola, Inc
LM11C MOTOROLA-LM11C Datasheet
359Kb / 6P
   Precision Operational Amplifiers
Tiger Electronic Co.,Ltd
Tiger Electronic Co.,Lt...
OP07CP TGS-OP07CP Datasheet
359Kb / 5P
   PRECISION OPERATIONAL AMPLIFIERS
OP07 TGS-OP07 Datasheet
359Kb / 5P
   PRECISION OPERATIONAL AMPLIFIERS
Texas Instruments
Texas Instruments
OP07C TI-OP07C_06 Datasheet
264Kb / 11P
[Old version datasheet]   PRECISION OPERATIONAL AMPLIFIERS
Tiger Electronic Co.,Ltd
Tiger Electronic Co.,Lt...
OP07CDR TGS-OP07CDR Datasheet
359Kb / 5P
   PRECISION OPERATIONAL AMPLIFIERS
Texas Instruments
Texas Instruments
OP07C TI-OP07C Datasheet
133Kb / 7P
[Old version datasheet]   PRECISION OPERATIONAL AMPLIFIERS
OP07C TI1-OP07C Datasheet
927Kb / 21P
[Old version datasheet]   Precision Operational Amplifiers
More results


Html Pages

1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17  18  19  20  21  22  23  24  25 


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
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