TC913A

First Monolithic Dual Auto-Zeroed Operational Amplifier
Chopper Amplifier Performance Without External Capacitors
   - VOS .............................................................. 15mV Max
   - VOS Drift ....................................... ......0.15mV/°C Max
   - Saves Cost/Assembly of Four "Chopper" Capacitors
SOIC Packages Available
High DC Gain ................................................. 120dB
Low Supply Current ...................................... 650mA
Low Input Voltage Noise
   (0.1 Hz to 10 Hz) ........................................ 0.65mVP-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/msec
   - Unity-Gain Bandwidth .............................1.5MHz
Pin Compatible With LM358, OP-14, MC1458,ICL7621,
TL082, TLC322

Total Supply Voltage (VDD to VSS ) .........................+18V
Input Voltage .....................(VDD + 0.3V) to (VSS 0.3V)
Current into Any Pin ................................................10mA
While Operating ....................................................100mA
Storage Temperature Range ............ 65°C to +150°C
Lead Temperature (Soldering, 10 sec) ............... +300°C
Operating Temperature Range
C Device ................................................... 0°C to +70°C
Package Power Dissipation (TA = £ 70°C)
Plastic SOIC ...........................................................470mW
Plastic DIP ..............................................................730mW

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-supplied, external 0.1mF 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 contrasted with a TC7650 chopper amplifier circuit implementation. A single TC913 replaces two TC7650's and four capacitors. Five components and assembly steps are eliminated.

The TC913 pinout matches many popular dualoperational 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 proprietary CMOS technology. Unity gain bandwidth is 1.5 MHz and slew rate is 2.5 V/msec.