TC913A/TC913B Dual Auto-Zeroed Operational Amplifiers Package Type Features • First Monolithic Dual Auto-Zeroed Operational Amplifier • Chopper Amplifier Performance Without External Capacitors - VOS: 15µV Max - VOS: 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 - 0.65µVP-P (0.1Hz to 10Hz) • 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 Applications • • • • • Instrumentation Medical Instrumentation Embedded Control Temperature Sensor Amplifier Strain Gage Amplifier Temp. Range Offset Voltage 8-Pin SOIC 0°C to +70°C 15µV TC913ACPA 8-Pin PDIP 0°C to +70°C 15µV TC913BCOA 8-Pin SOIC 0°C to +70°C 30µV TC913BCPA 8-Pin PDIP 0°C to +70°C 30µV Package TC913ACOA 2002 Microchip Technology Inc. OUT A 1 -IN A 2 SS B + +IN A 3 V 8 V A - + DD 7 OUT B - 4 6 -IN B 5 +IN B SOIC TC913ACOA TC913BCOA OUT A 1 -IN A 2 +IN A 3 V 8 V DD A - + 4 SS B + 7 OUT B - 6 -IN B 5 +IN B 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-supplied, 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 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. Device Selection Table Part Number PDIP TC913ACPA TC913BCPA 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 Microchip's proprietary CMOS technology. Unity gain bandwidth is 1.5MHz and slew rate is 2.5V/µsec. DS21482B-page 1 TC913A/TC913B Functional Block Diagram VDD VSS 4 8 TC913 VOS Correction Amplifier + A A – B * B Internal Oscillator (fOSC 200Hz) * -Input -Input +Input +Input A B A B 2 6 5 3 - Low Impedance Output Buffer + + Main Amplifier - 1 7 Output A Output B 1 of 2 Amplifier Shown *NOTE: Internal capacitors. No external capacitors required. DS21482B-page 2 2002 Microchip Technology Inc. TC913A/TC913B 1.0 ELECTRICAL CHARACTERISTICS Absolute Maximum Ratings* Total Supply Voltage (V DD to VSS) .......................+18V Input Voltage ...................... (VDD +0.3V) to (VSS -0.3V) *Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions above those indicated in the operation sections of the specifications is not implied. Exposure to Absolute Maximum Rating conditions for extended periods may affect device reliability. Current Into Any Pin............................................ 10mA While Operating .......................................... 100µA Package Power Dissipation (TA – 70°C) Plastic DIP ................................................ 730mW Plastic SOIC ............................................. 470mW Operating Temperature Range C Device .......................................... 0°C to +70°C Storage Temperature Range .............. -65°C to +150°C TC913A AND TC913B ELECTRICAL SPECIFICATIONS Electrical Characteristics: VS = ±5V, TA = +25°C, unless otherwise indicated. TC913A Symbol Min Typ Max Min Typ Max Unit Input Offset Voltage — 5 15 — 15 30 µV TCV OS Average Temp. Coefficient of Input Offset Voltage — — 0.05 0.05 0.15 0.15 — — 0.1 0.1 0.25 0.25 µV/°C µV/°C IB Average Input Bias Current — — — — — — 90 3 4 — — — — — — 120 4 6 pA nA nA TA = +25°C 0°C ≤ TA ≤ +70°C -25°C ≤ TA ≤ +85° IOS Average Input Offset Current — — 5 — 20 1 — — 10 — 40 1 pA nA TA = +25°C TA = +85°C eN Input Voltage Noise — — 0.6 11 — — — — 0.6 11 — — µVP-P µVP-P VOS Parameter TC913B CMRR Common Mode Rejection Ratio 110 116 — 100 110 — dB CMVR Common Mode Voltage Range V SS — VDD - 2 VSS — VDD - 2 V Open-Loop Voltage Gain 115 120 — 110 120 — dB VSS + 0.3 — VDD - 0.9 VSS + 0.3 — VDD -0.9 V MHz AOL V OUT Output Voltage Swing BW Closed Loop Bandwidth — 1.5 — — 1.5 — SR Slew Rate — 2.5 — — 2.5 — Test Conditions TA = +25°C 0°C ≤ TA ≤ +70°C -25°C ≤ TA ≤ +85°C (Note 1) 0.1 to 1 Hz, RS ≤ 100Ω 0.1 to 10 Hz, RS ≤ 100Ω VSS ≤ VCM ≤ VDD - 2.2 RL = 10 kΩ, VOUT = ±4V RL = 10 kΩ Closed Loop Gain = +1 V/µsec RL = 10 kΩ, CL = 50 pF PSRR Power Supply Rejection Ratio 110 — — 100 — — dB ±3.3V to ±5.5V VS Operating Supply Voltage Range ±3.3 6.5 — — ±8.3 16 ±3.3 6.5 — — ±8.3 16 V V Split Supply Single Supply IS Quiescent Supply Current — 0.65 0.85 — — 1.1 mA Note 1: VS = ±5V Characterized; not 100% tested. 2002 Microchip Technology Inc. DS21482B-page 3 TC913A/TC913B 2.0 PIN DESCRIPTIONS The descriptions of the pins are listed in Table 2-1. TABLE 2-1: PIN FUNCTION TABLE Pin No. (8-Pin PDIP) (8-Pin SOIC) Symbol 1 OUT A 2 -IN A Inverting Input 3 +IN A Non-inverting Input 4 VSS 5 +IN B Non-inverting Input 6 -IN B Inverting Input 7 OUT B 8 VDD DS21482B-page 4 Description Output Negative Power Supply Output Positive Power Supply 2002 Microchip Technology Inc. TC913A/TC913B 3.0 DETAILED DESCRIPTION 3.3 3.1 Theory of Operation The TC913 recovers quickly from output saturation. Typical recovery time from positive output saturation is 20 msec. Negative output saturation recovery time is typically 5 msec. Each of the TC913's two Op Amps actually consists of two amplifiers. A main amplifier is always connected from the input to the output. A separate nulling amplifier alternately nulls its own offset and then the offset of the amplifier. Since each amplifier is continuously being nulled, offset voltage drift with time, temperature and power supply variations is greatly reduced. All nulling circuitry is internal and the nulling operation is transparent to the user. Offset nulling voltages are stored on two internal capacitors. An internal oscillator and control logic, shared by the TC913's two amplifiers, control the nulling process. 3.2 Pin Compatibility 3.4 Overload Recovery Avoiding Latchup Junction-isolated CMOS circuits inherently contain a parasitic p-n-p-n transistor circuit. Voltages exceeding the supplies by 0.3V should not be applied to the device pins. Larger voltages can turn the p-n-p-n device on, causing excessive device power supply current and power dissipation. The TC913's power supplies should be established at the same time or before input signals are applied. If this is not possible, input current should be limited to 0.1mA to avoid triggering the p-n-p-n structure. The TC913 pinout is compatible with OP-14, LM358, MC1458, LT1013, TLC322, and similar dual Op Amps. In many circuits operating from single or ±5V supplies, the TC913 is a drop-in replacement offering DC performance rivaling that of the best single Op Amps. The TC913's amplifiers include a low-impedance class AB output buffer. Some previous CMOS chopper amplifiers used a high impedance output stage which made open-loop gain dependent on load resistance. The TC913's open-loop gain is not dependent on load resistance. 2002 Microchip Technology Inc. DS21482B-page 5 TC913A/TC913B 4.0 TYPICAL CHARACTERISTICS The graphs and tables provided following this note are a statistical summary based on a limited number of samples and are provided for informational purposes only. The performance characteristics listed herein are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified operating range (e.g., outside specified power supply range) and therefore outside the warranted range. Input Offset Voltage vs. Common Mode Voltage Supply Current vs. ± Supply Voltage 1200 800 600 400 200 0 2 3 4 5 6 ± SUPPLY VOLTAGE (V) 7 8 ± OUTPUT VOLTAGE (V) Output Voltage Swing vs. Load Resistance TA = +25˚C VS = ±5V 4.2 30 225 VS = ±5V 40 TA = +25˚C CLOSED-LOOP GAIN (dB) INPUT OFFSET VOLTAGE (µV) SUPPLY CURRENT (µA) VA = ±5V 1000 5.0 Gain and Phase vs. Frequency 50 35 TA = +25˚C 25 20 15 PHASE 30 180 TA = +25˚C Ω RL = 10 k 135 GAIN 20 90 10 45 0 0 -10 -45 -20 -90 5 -30 -135 0 -40 10k 10 -6 -5 -4 -3 -2 -1 0 1 2 3 4 INPUT COMMON MODE VOLTAGE (V) Negative Overload Recovery Time PHASE (deg) Note: -180 10M 100k 1M FREQUENCY (Hz) Positive Overload Recovery Time Ω RL = 10 k -SWING TA = +25˚C +SWING OUTPUT = 2 V/DIV INPUT 0V 0V 3.4 2.6 OUTPUT = 2 V/DIV 1.8 Gain = –20 1.0 100 1k 10k 100k LOAD RESISTANCE (Ω) DS21482B-page 6 1M HORIZONTAL SCALE = 20 msec/DIV INPUT INPUT GAIN = –20 HORIZONTAL SCALE = 20 msec/DIV 2002 Microchip Technology Inc. TC913A/TC913B 5.0 PACKAGING INFORMATION 5.1 Package Marking Information Package marking data not available at this time. 5.2 Taping Form Component Taping Orientation for 8-Pin SOIC (Narrow) Devices User Direction of Feed PIN 1 W P Standard Reel Component Orientation for TR Suffix Device Carrier Tape, Number of Components Per Reel and Reel Size Package 8-Pin SOIC (N) 2002 Microchip Technology Inc. Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size 12 mm 8 mm 2500 13 in DS21482B-page 7 TC913A/TC913B 5.3 Package Dimensions 8-Pin SOIC PIN 1 .157 (3.99) .150 (3.81) .244 (6.20) .228 (5.79) .050 (1.27) TYP. .197 (5.00) .189 (4.80) .069 (1.75) .053 (1.35) .010 (0.25) .007 (0.18) 8° MAX.. .020 (0.51) .010 (0.25) .013 (0.33) .004 (0.10) .050 (1.27) .016 (0.40) Dimensions: inches (mm) 8-Pin Plastic DIP PIN 1 .260 (6.60) .240 (6.10) .045 (1.14) .030 (0.76) .070 (1.78) .040 (1.02) .310 (7.87) .290 (7.37) .400 (10.16) .348 (8.84) .200 (5.08) .140 (3.56) .040 (1.02) .020 (0.51) .150 (3.81) .115 (2.92) .110 (2.79) .090 (2.29) .022 (0.56) .015 (0.38) .015 (0.38) .008 (0.20) 3° MIN. .400 (10.16) .310 (7.87) Dimensions: inches (mm) DS21482B-page 8 2002 Microchip Technology Inc. TC913A/TC913B SALES AND SUPPORT Data Sheets Products supported by a preliminary Data Sheet may have an errata sheet describing minor operational differences and recommended workarounds. To determine if an errata sheet exists for a particular device, please contact one of the following: 1. 2. 3. Your local Microchip sales office The Microchip Corporate Literature Center U.S. FAX: (480) 792-7277 The Microchip Worldwide Site (www.microchip.com) Please specify which device, revision of silicon and Data Sheet (include Literature #) you are using. New Customer Notification System Register on our web site (www.microchip.com/cn) to receive the most current information on our products. 2002 Microchip Technology Inc. DS21482B-page 9 TC913A/TC913B NOTES: DS21482B-page 10 2002 Microchip Technology Inc. TC913A/TC913B Information contained in this publication regarding device applications and the like is intended through suggestion only and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. No representation or warranty is given and no liability is assumed by Microchip Technology Incorporated with respect to the accuracy or use of such information, or infringement of patents or other intellectual property rights arising from such use or otherwise. Use of Microchip’s products as critical components in life support systems is not authorized except with express written approval by Microchip. No licenses are conveyed, implicitly or otherwise, under any intellectual property rights. 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