TC913A/TC913B
Dual Auto-Zeroed Operational Amplifiers
Features
• First Monolithic Dual Auto-Zeroed
Operational Amplifier
• Chopper Amplifier Performance Without External
Capacitors
- V
OS
: 15µV Max
- V
OS
: 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
- 0.65µV
P-P
(0.1Hz to 10Hz)
• Wide Common Mode Voltage Range
- V
SS
to V
DD
- 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
Package Type
PDIP
TC913ACPA
TC913BCPA
OUT A 1
-IN A 2
+IN A 3
V
SS
A
+ -
A
+ -
8 V
B
-
+
DD
7 OUT B
6 -IN B
5 +IN B
4
SOIC
TC913ACOA
TC913BCOA
OUT A 1
-IN A 2
+IN A 3
V
SS
8 V
DD
B
-
+
7 OUT B
6 -IN B
5 +IN B
4
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.
Applications
•
•
•
•
•
Instrumentation
Medical Instrumentation
Embedded Control
Temperature Sensor Amplifier
Strain Gage Amplifier
Device Selection Table
Part Number
TC913ACOA
TC913ACPA
TC913BCOA
TC913BCPA
Package
8-Pin SOIC
8-Pin PDIP
8-Pin SOIC
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
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
©
MICROCHIP [ MICROCHIP TECHNOLOGY ]
