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PDF TC913ACPA Data sheet ( Hoja de datos )
| Número de pieza | TC913ACPA | |
| Descripción | Dual Auto-Zeroed Operational Amplifiers | |
| Fabricantes | Microchip Technology | |
| Logotipo |  |
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TC913A/TC913B
Dual Auto-Zeroed Operational Amplifiers
Features
• First Monolithic Dual Auto-Zeroed
Operational Amplifier
• Chopper Amplifier Performance Without External
Capacitors
- VOS: 15µV Max
- VOS: Drift; 0.15µV/°C Max
- Saves Cost of External Capacitors
• SOIC Packages Available
• High DC Gain; 120dB
• Low Supply Current; 650µA
• Low Input Voltage Noise
- 0.65µVP-P (0.1Hz to 10Hz)
• Wide Common Mode Voltage Range
- VSS to VDD - 2V
• High Common Mode Rejection; 116dB
• Dual or Single Supply Operation:
- ±3.3V to ±8.3V
- +6.5V to +16V
• Excellent AC Operating Characteristics
- Slew Rate; 2.5V/µsec
- Unity-Gain Bandwidth; 1.5MHz
• Pin Compatible with LM358, OP-14, MC1458,
ICL7621, TL082, TLC322
Applications
• Instrumentation
• Medical Instrumentation
• Embedded Control
• Temperature Sensor Amplifier
• Strain Gage Amplifier
Device Selection Table
Part Number Package
TC913ACOA 8-Pin SOIC
TC913ACPA 8-Pin PDIP
TC913BCOA 8-Pin SOIC
TC913BCPA 8-Pin PDIP
Temp.
Range
0°C to
+70°C
0°C to
+70°C
0°C to
+70°C
0°C to
+70°C
Offset
Voltage
15µV
15µV
30µV
30µV
Package Type
PDIP
TC913ACPA
TC913BCPA
OUT A 1
-IN A 2
+IN A 3
V
SS
4
A
-+ B
+-
8 VDD
7 OUT B
6 -IN B
5 +IN B
SOIC
TC913ACOA
TC913BCOA
OUT A 1
-IN A 2
+IN A 3
V
SS
4
A
-+ B
+-
8 VDD
7 OUT B
6 -IN B
5 +IN B
General Description
The TC913 is the world's first complete monolithic, dual
auto-zeroed operational amplifier. The TC913 sets a
new standard for low power, precision dual-operational
amplifiers. Chopper-stabilized or auto-zeroed amplifi-
ers offer low offset voltage errors by periodically sam-
pling offset error, and storing correction voltages on
capacitors. Previous single amplifier designs required
two user-supplied, external 0.1µF error storage correc-
tion capacitors — much too large for on-chip integra-
tion. The unique TC913 architecture requires smaller
capacitors, making on-chip integration possible.
Microvolt offset levels are achieved and external
capacitors are not required.
The TC913 system benefits are apparent when con-
trasted with a TC7650 chopper amplifier circuit imple-
mentation. A single TC913 replaces two TC7650's and
four capacitors. Five components and assembly steps
are eliminated.
The TC913 pinout matches many popular dual-opera-
tional amplifiers: OP-04, TLC322, LM358, and ICL7621
are typical examples. In many applications, operating
from dual 5V power supplies or single supplies, the
TC913 offers superior electrical performance, and can
be a functional drop-in replacement; printed circuit
board rework is not necessary. The TC913's low offset
voltage error eliminates offset voltage trim
potentiometers often needed with bipolar and low
accuracy CMOS operational amplifiers.
The TC913 takes full advantage of Microchip's
proprietary CMOS technology. Unity gain bandwidth is
1.5MHz and slew rate is 2.5V/µsec.
© 2002 Microchip Technology Inc.
DS21482B-page 1
1 page  
3.0 DETAILED DESCRIPTION
3.1 Theory of Operation
Each of the TC913's two Op Amps actually consists of
two amplifiers. A main amplifier is always connected
from the input to the output. A separate nulling amplifier
alternately nulls its own offset and then the offset of the
amplifier. Since each amplifier is continuously being
nulled, offset voltage drift with time, temperature and
power supply variations is greatly reduced.
All nulling circuitry is internal and the nulling operation
is transparent to the user. Offset nulling voltages are
stored on two internal capacitors. An internal oscillator
and control logic, shared by the TC913's two amplifiers,
control the nulling process.
3.2 Pin Compatibility
The TC913 pinout is compatible with OP-14, LM358,
MC1458, LT1013, TLC322, and similar dual Op Amps.
In many circuits operating from single or ±5V supplies,
the TC913 is a drop-in replacement offering DC
performance rivaling that of the best single Op Amps.
The TC913's amplifiers include a low-impedance class
AB output buffer. Some previous CMOS chopper
amplifiers used a high impedance output stage which
made open-loop gain dependent on load resistance.
The TC913's open-loop gain is not dependent on load
resistance.
TC913A/TC913B
3.3 Overload Recovery
The TC913 recovers quickly from output saturation.
Typical recovery time from positive output saturation is
20 msec. Negative output saturation recovery time is
typically 5 msec.
3.4 Avoiding Latchup
Junction-isolated CMOS circuits inherently contain a
parasitic p-n-p-n transistor circuit. Voltages exceeding
the supplies by 0.3V should not be applied to the
device pins. Larger voltages can turn the p-n-p-n
device on, causing excessive device power supply
current and power dissipation. The TC913's power
supplies should be established at the same time or
before input signals are applied. If this is not possible,
input current should be limited to 0.1mA to avoid
triggering the p-n-p-n structure.
© 2002 Microchip Technology Inc.
DS21482B-page 5
5 Page 
TC913A/TC913B
Information contained in this publication regarding device
applications and the like is intended through suggestion only
and may be superseded by updates. It is your responsibility to
ensure that your application meets with your specifications.
No representation or warranty is given and no liability is
assumed by Microchip Technology Incorporated with respect
to the accuracy or use of such information, or infringement of
patents or other intellectual property rights arising from such
use or otherwise. Use of Microchip’s products as critical com-
ponents in life support systems is not authorized except with
express written approval by Microchip. No licenses are con-
veyed, implicitly or otherwise, under any intellectual property
rights.
Trademarks
The Microchip name and logo, the Microchip logo, FilterLab,
KEELOQ, microID, MPLAB, PIC, PICmicro, PICMASTER,
PICSTART, PRO MATE, SEEVAL and The Embedded Control
Solutions Company are registered trademarks of Microchip Tech-
nology Incorporated in the U.S.A. and other countries.
dsPIC, ECONOMONITOR, FanSense, FlexROM, fuzzyLAB,
In-Circuit Serial Programming, ICSP, ICEPIC, microPort,
Migratable Memory, MPASM, MPLIB, MPLINK, MPSIM,
MXDEV, PICC, PICDEM, PICDEM.net, rfPIC, Select Mode
and Total Endurance are trademarks of Microchip Technology
Incorporated in the U.S.A.
Serialized Quick Turn Programming (SQTP) is a service mark
of Microchip Technology Incorporated in the U.S.A.
All other trademarks mentioned herein are property of their
respective companies.
© 2002, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.
Printed on recycled paper.
© 2002 Microchip Technology Inc.
Microchip received QS-9000 quality system
certification for its worldwide headquarters,
design and wafer fabrication facilities in
Chandler and Tempe, Arizona in July 1999
and Mountain View, California in March 2002.
The Company’s quality system processes and
procedures are QS-9000 compliant for its
PICmicro® 8-bit MCUs, KEELOQ® code hopping
devices, Serial EEPROMs, microperipherals,
non-volatile memory and analog products. In
addition, Microchip’s quality system for the
design and manufacture of development
systems is ISO 9001 certified.
DS21482B-page 11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet TC913ACPA.PDF ] | |
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