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TC913A
TC913B
DUAL AUTO-ZEROED OPERATIONAL AMPLIFIERS
FEATURES
s
s
First Monolithic Dual Auto-Zeroed Operational
Amplifier
Chopper Amplifier Performance Without External
Capacitors
— V
OS
........................................................ 15
µ
V Max
— V
OS
Drift ....................................... 0.15
µ
V/
°
C Max
— Saves Cost/Assembly of Four "Chopper"
Capacitors
SOIC Packages Available
High DC Gain ................................................. 120dB
Low Supply Current ...................................... 650
µ
A
Low Input Voltage Noise
(0.1 Hz to 10 Hz) ........................................ 0.65
µ
V
P-P
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/
µ
sec
— Unity-Gain Bandwidth ............................. 1.5MHz
Pin Compatible With LM358, OP-14, MC1458,
ICL7621, TL082, TLC322
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 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.
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.
2
3
4
5
6
7
1
7
OUTPUT A
OUTPUT B
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ORDERING INFORMATION
Temp.
Range
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
Part No.
TC913ACOA
TC913ACPA
TC913BCOA
TC913BCPA
Package
8-Pin SOIC
8-Pin Plastic DIP
8-Pin SOIC
8-Pin Plastic DIP
Maximum
Offset
Voltage
15µV
15µV
30µV
30µV
FUNCTIONAL BLOCK DIAGRAM
VSS
VDD
8
4
PIN CONFIGURATION
(SOIC and DIP)
VOS CORRECTION AMPLIFIER
+
A
A
–
*
B
B
INTERNAL
OSCILLATOR
(f OSC
≈
200 Hz)
OUT A 1
–IN A 2
+IN A 3
V SS 4
A
+ –
5 +IN B
V SS 4
TC913ACPA
TC913BCPA
TC913ACOA
TC913BCOA
TELCOM SEMICONDUCTOR, INC.
–
+
6 –IN B
+IN A 3
+ –
B
–
+
8 V DD
7 OUT B
OUT A 1
–IN A 2
A
8 V DD
B
7 OUT B
6 –IN B
5 +IN B
–INPUT A
–INPUT B
–INPUT A
–INPUT B
2
6
5
3
*
–
+
MAIN
AMPLIFIER
1 OF 2 AMPLIFIERS SHOWN
–
LOW IMPEDANCE
OUTPUT BUFFER
+
TC913
*NOTE:
Internal capacitors. No external capacitors required.
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TC913A/B-8 9/3/96
3-269
TELCOM [ TELCOM SEMICONDUCTOR, INC ]
