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TC913A
TC913B
DUAL AUTO-ZEROED OPERATIONAL AMPLIFIERS
GENERAL DESCRIPTION
FEATURES
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 amplifiers
offer low offset voltage errors by periodically sampling
offset error, and storing correction voltages on capacitors.
Previous single amplifier designs required two user-sup-
plied, external 0.1µF error storage correction capacitors —
much too large for on-chip integration. 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 implemen-
tation. A single TC913 replaces two TC7650's and four
capacitors. Five components and assembly steps are elimi-
nated.
The TC913 pinout matches many popular dual-
operational 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.
■ First Monolithic Dual Auto-Zeroed Operational
Amplifier
■ Chopper Amplifier Performance Without External
Capacitors
— VOS ........................................................ 15µV Max
— VOS Drift ....................................... 0.15µV/°C Max
— Saves Cost/Assembly of Four "Chopper"
Capacitors
■ SOIC Packages Available
■ High DC Gain ................................................. 120dB
■ Low Supply Current ...................................... 650µA
■ Low Input Voltage Noise
(0.1 Hz to 10 Hz) ........................................ 0.65µVP-P
■ 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
ORDERING INFORMATION
Maximum
The TC913 takes full advantage of TelCom's propri-
etary CMOS technology. Unity gain bandwidth is 1.5 MHz
and slew rate is 2.5 V/µsec.
Temp.
Range
Offset
Voltage
Part No.
Package
TC913ACOA
TC913ACPA
TC913BCOA
TC913BCPA
8-Pin SOIC
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
15µV
15µV
30µV
30µV
8-Pin Plastic DIP
8-Pin SOIC
8-Pin Plastic DIP
FUNCTIONAL BLOCK DIAGRAM
V
V
DD
SS
PIN CONFIGURATION (SOIC and DIP)
4
8
V
CORRECTION AMPLIFIER
OS
+
A
B
A
INTERNAL
–
OSCILLATOR
V
1
DD
8
1
2
3
4
OUT A
–IN A
+IN A
OUT A
–IN A
+IN A
8
7
6
5
≈
200 Hz)
OSC
V
(f
A
+
A
+
DD
B
*
B
B
–
–
2
3
4
7
6
5
OUT B
–IN B
+IN B
OUT B
*
+
–
+
–
–IN B
+IN B
LOW IMPEDANCE
OUTPUT BUFFER
TC913
–INPUT A
–INPUT B
–INPUT A
–INPUT B
2
6
5
V
–
+
V
SS
SS
+
OUTPUT A
OUTPUT B
1
7
3
–
MAIN
AMPLIFIER
TC913ACOA
TC913BCOA
TC913ACPA
TC913BCPA
1 OF 2 AMPLIFIERS SHOWN
*NOTE: Internal capacitors. No external capacitors required.
TC913A/B-8 9/3/96
TELCOM SEMICONDUCTOR, INC.
3-269