TC913A_06 MICROCHIP | Alldatasheet

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© 2006 Microchip Technology Inc. DS21482C-page 1 TC913A/TC913B Features:

  • First Monolithic Dual Auto-Zeroed Operational Amplifier
  • Chopper Amplifier Performance Without External Capacitors: - VOS: 15 μV Max. - VOS: Drift; 0.15 μV/°C Max. - Saves Cost of External Capacitors
  • SOIC Packages Available
  • High DC Gain; 120dB
  • Low Supply Current; 650 μA
  • Low Input Voltage Noise: - 0.65 μVP-P (0.1 Hz to 10 Hz)
  • 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; 1.5 MHz
  • Pin Compatible with LM358, OP-14, MC1458, ICL7621, TL082, TLC322 Applications:
  • Instrumentation
  • Medical Instrumentation
  • Embedded Control
  • Temperature Sensor Amplifier
  • Strain Gage Amplifier Device Selection Table Package Type 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 amplifi- ers offer low offset voltage errors by periodically sam- pling offset error, and storing correction voltages on capacitors. Previous single amplifier designs required two user-supplied, external 0.1μF error storage correc- tion capacitors — much too large for on-chip integra- tion. 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 imple- mentation. A single TC913 replaces two TC7650’s and four capacitors. Five components and assembly steps are eliminated. The TC913 pinout matches many popular dual-opera- tional 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 1.5 MHz and slew rate is 2.5V/μsec. Part Number Package Temp. Range Offset Voltage TC913ACOA 8-Pin SOIC 0°C to +70°C 15 μV TC913ACPA 8-Pin PDIP 0°C to +70°C 15 μV TC913BCOA 8-Pin SOIC 0°C to +70°C 30 μV TC913BCPA 8-Pin PDIP 0°C to +70°C 30 μV -IN B OUT A -IN A +IN A V SS V SS VDD VDD +IN B PDIP SOIC TC913ACPA TC913BCPA TC913ACOA TC913BCOA OUT B A B -IN B OUT A -IN A +IN A +IN B OUT B A B Dual Auto-Zeroed Operational Amplifiers

© 2006 Microchip Technology Inc. Functional Block Diagram TC913 A B A B *NOTE: Internal capacitors. No external capacitors required. Main Amplifier Low-Impedance Output Buffer Internal Oscillator (fOSC 200 Hz) -Input A -Input B 1 of 2 Amplifier Shown Output A +Input A +Input B Output B VDD VSS VOS Correction Amplifier

© 2006 Microchip Technology Inc. DS21482C-page 3 TC913A/TC913B 1.0 ELECTRICAL CHARACTERISTICS Absolute Maximum Ratings* +0.3V) to (VSS -0.3V) Package Power Dissipation (TA – 70°C) Operating Temperature Range *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. TC913A AND TC913B ELECTRICAL SPECIFICATIONS Electrical Characteristics: VS = ±5V, TA = +25°C, unless otherwise indicated. TC913A TC913B Symbol Parameter Min Typ Max Min Typ Max Unit Test Conditions VOS Input Offset Voltage μV TA = +25°C TCVOS 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 0°C ≤ TA ≤ +70°C -25°C ≤ TA ≤ +85°C (Note 1) IB Average Input Bias Current 120 pA nA nA TA = +25°C 0°C ≤ TA ≤ +70°C -25°C ≤ TA ≤ +85° IOS Average Input Offset Current pA nA TA = +25°C TA = +85°C eN Input Voltage Noise 0.6 0.6 μVP-P μVP-P 0.1 to 1 Hz, RS ≤ 100Ω 0.1 to 10 Hz, RS ≤ 100Ω CMRR Common Mode Rejection Ratio 110 116 100 110 dB VSS ≤ VCM ≤ VDD - 2.2 CMVR Common Mode Voltage Range VSS VDD - 2 VSS VDD - 2 V AOL Open-Loop Voltage Gain 115 120 110 120 dB RL = 10 kΩ, VOUT = ±4V VOUT Output Voltage Swing VSS + 0.3 VDD - 0.9 VSS + 0.3 VDD -0.9 V RL = 10 kΩ BW Closed Loop Bandwidth 1.5 1.5 MHz Closed Loop Gain = +1 SR Slew Rate 2.5 2.5 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 ±3.5 7.0 ±8.3 ±3.5 7.0 ±8.3 V V Split Supply Single Supply IS Quiescent Supply Current 0.65 0.85 1.1 mA VS = ±5V Note Characterized; not 100% tested.

© 2006 Microchip Technology Inc. 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

Description

-IN A Inverting Input +IN A Non-inverting Input VSS Negative Power Supply +IN B Non-inverting Input -IN B Inverting Input OUT B Output VDD Positive Power Supply

© 2006 Microchip Technology Inc. DS21482C-page 5 TC913A/TC913B 3.0 DETAILED DESCRIPTION 3.1 Theory of Operation 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 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. 3.3 Overload Recovery 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. 3.4 Avoiding Latch-up 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 0.1 mA to avoid triggering the p-n-p-n structure.

© 2006 Microchip Technology Inc. 4.0 TYPICAL CHARACTERISTICS Note: 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. HORIZONTAL SCALE = 20 msec/DIV Positive Overload Recovery Time OUTPUT =

2 V/DIV

GAIN = –20 INPUT OFFSET VOLTAGE (µV) INPUT COMMON MODE VOLTAGE (V) Input Offset Voltage vs. Common Mode Voltage VA = ±5V TA = +25°C SUPPLY CURRENT (µA) ± SUPPLY VOLTAGE (V) Supply Current vs. ± Supply Voltage HORIZONTAL SCALE = 20 msec/DIV Negative Overload Recovery Time RL = 10 k TA = +25°C W INPUT OUTPUT = 2 V/DIV CLOSED-LOOP GAIN (dB) 10k FREQUENCY (Hz) Gain and Phase vs. Frequency -10 -20 -30 -40 100k 10M PHASE GAIN VS = ±5V TA = +25°C RL = 10 kW 225 PHASE (deg) 180 135 -45 -90 -135 -180 ± OUTPUT VOLTAGE (V) 100 LOAD RESISTANCE (W) Output Voltage Swing vs. Load Resistance 5.0 VS = ±5V TA = +25°C -SWING +SWING 4.2 3.4 2.6 1.8 1.0 10k 100k 1200 1000 800 600 400 200 TA = +25°C Gain = –20

© 2006 Microchip Technology Inc. DS21482C-page 7 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 Package Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size 8-Pin SOIC (N) 12 mm 8 mm 2500 13 in Carrier Tape, Number of Components Per Reel and Reel Size Standard Reel Component Orientation for 713 Suffix Device Pin 1 User Direction of Feed P W

© 2006 Microchip Technology Inc. 5.3 Package Dimensions .050 (1.27) Typ. 8° Max. Pin 1 .244 (6.20) .228 (5.79) .157 (3.99) .150 (3.81) .197 (5.00) .189 (4.80) .020 (0.51) .013 (0.33) .010 (0.25) .004 (0.10) .069 (1.75) .053 (1.35) .010 (0.25) .007 (0.18) .050 (1.27) .016 (0.40) 8-Pin SOIC Dimensions: inches (mm) 3° Min. Pin1 .260 (6.60) .240 (6.10) .045 (1.14) .030 (0.76) .070 (1.78) .040 (1.02) .400 (10.16) .348 (8.84) .200 (5.08) .140 (3.56) .150 (3.81) .115 (2.92) .110 (2.79) .090 (2.29) .022 (0.56) .015 (0.38) .040 (1.02) .020 (0.51) .015 (0.38) .008 (0.20) .310 (7.87) .290 (7.37) .400 (10.16) .310 (7.87) 8-Pin Plastic DIP Dimensions: inches (mm)

© 2006 Microchip Technology Inc. DS21482C-page 9 TC913A/TC913B THE MICROCHIP WEB SITE Microchip provides online support via our WWW site at www.microchip.com. This web site is used as a means to make files and information easily available to customers. Accessible by using your favorite Internet browser, the web site contains the following information:

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© 2006 Microchip Technology Inc. READER RESPONSE It is our intention to provide you with the best documentation possible to ensure successful use of your Microchip prod- uct. If you wish to provide your comments on organization, clarity, subject matter, and ways in which our documentation can better serve you, please FAX your comments to the Technical Publications Manager at (480) 792-4150. Please list the following information, and use this outline to provide us with your comments about this document. To: Technical Publications Manager RE: Reader Response From: Name Company Address City / State / ZIP / Country Application (optional): Would you like a reply? Y N Device: Literature Number: Questions: DS21482C TC913A/TC913B What are the best features of this document? How does this document meet your hardware and software development needs? Do you find the organization of this document easy to follow? If not, why? What additions to the document do you think would enhance the structure and subject? What deletions from the document could be made without affecting the overall usefulness? Is there any incorrect or misleading information (what and where)? How would you improve this document?

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