TC913A Datasheet, PDF (1/4 Pages) TelCom Semiconductor, Inc – DUAL AUTO-ZEROED OPERATIONAL AMPLIFIERS

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TC913A
TC913B
DUAL AUTO-ZEROED OPERATIONAL AMPLIFIERS
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FEATURES
GENERAL DESCRIPTION
s First Monolithic Dual Auto-Zeroed Operational
Amplifier
s Chopper Amplifier Performance Without External
Capacitors
— V_OS ........................................................ 15µV Max
— V_OS Drift ....................................... 0.15µV/°C Max
— Saves Cost/Assembly of Four "Chopper"
Capacitors
s SOIC Packages Available
s High DC Gain ................................................. 120dB
s Low Supply Current ...................................... 650µA
s Low Input Voltage Noise
(0.1 Hz to 10 Hz) ........................................ 0.65µV_P-P
s Wide Common-Mode
Voltage Range ................................. V_SS to V_DD – 2V
s High Common-Mode Rejection .................... 116dB
s Dual or Single Supply Operation ....±3.3V to ±8.3V
+6.5V to +16V
s Excellent AC Operating Characteristics
— Slew Rate ............................................. 2.5V/µsec
— Unity-Gain Bandwidth ............................. 1.5MHz
s Pin Compatible With LM358, OP-14, MC1458,
ICL7621, TL082, TLC322
ORDERING INFORMATION
Part No.
TC913ACOA
TC913ACPA
Package
8-Pin SOIC
8-Pin Plastic DIP
Temp.
Range
Maximum
Offset
Voltage
0°C to +70°C
0°C to +70°C
15µV
15µV
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
3 ^{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-
4 ^{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,
5 ^{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.
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TC913BCOA 8-Pin SOIC
0°C to +70°C 30µV
TC913BCPA 8-Pin Plastic DIP 0°C to +70°C 30µV
FUNCTIONAL BLOCK DIAGRAM
PIN CONFIGURATION (SOIC and DIP)
VSS
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VDD
8
OUT A 1
–IN A 2
+IN A 3
VSS ₄
A
–+ ^B
+–
8 VDD OUT A ¹
7 OUT B –IN A 2
6 –IN B
5 +IN B
+IN A 3
VSS ₄
A
–+ ^B
+–
8 ^VDD
7 OUT B
6 –IN B
5 +IN B
TC913ACPA
TC913BCPA
TC913ACOA
TC913BCOA
VOS CORRECTION AMPLIFIER
+
A
A
–
*
B
B
INTERNAL
OSCILLATOR
(fOSC ≈ 200 Hz)
–INPUT A ₂
–INPUT B 6
–INPUT A 5
–INPUT B 3
*
–
+
MAIN
AMPLIFIER
1 OF 2 AMPLIFIERS SHOWN
LOW IMPEDANCE
OUTPUT BUFFER
+
–
TC913
1 ^{OUTPUT A}
7 ^{OUTPUT B}
*NOTE: Internal capacitors. No external capacitors required.
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TELCOM SEMICONDUCTOR, INC.
TC913A/B-8 9/3/96
3-269