TC901 MICROCHIP | Alldatasheet
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TC901- 7 9/5/96© 2001 Microchip Technology Inc. DS21480A GENERAL DESCRIPTION The TC901 is a monolithic, auto-zeroed operational amplifier. It is a second-generation design of the TC91X CMOS chopper-stabilized op-amps with on-chip capacitors. Elimination of the external capacitors allows the de- signer to increase reliability, lower cost, and simplify design by lowering parts count. Since the TC901 is an auto-zeroing op amp, input offset voltage is very low. More important, there is almost zero drift with time. This eliminates production line adjustments, as well as periodic calibration. Notable electrical characteristics are low supply cur- rent (450µA, typical), single-supply operation (5V to 32V), low input offset voltage (7µV, typical), low noise (<5µV P-P, typical, for a 10Hz bandwidth), and fast recovery from saturation without the use of external clamp circuitry. This device is supplied in 8-pin plastic DIP and plastic SOIC packages. It is pin compatible with bipolar, CMOS, JFET and other chopper-stabilized op-amps using the in- dustry-standard 741 pinout.
FEATURES
I Second-Generation Monolithic, Chopper-Stabilized Op Amp I No External Capacitors Required I Pinout Compatible With ICL7650 I Lowest Parts Count Chopper Op Amp PIN CONFIGURATION (DIP and SOIC) OUTPUT NC +INPUT TC901CPA –INPUT NC NC VDD VDD VSS VSS NC = NO INTERNAL CONNECTION OUTPUT NC +INPUT TC901COA –INPUT NC NC FUNCTIONAL BLOCK DIAGRAM VDD VSS TC901–INPUT +INPUT A A B NOTE: Internal capacitors. No external capacitors required. MAIN AMPLIFIER LOW IMPEDANCE OUTPUT BUFFER INTERNAL OSCILLATOR (f 200 Hz)OSC ≈ V CORRECTION AMPLIFIEROS+ OUTPUT
ORDERING INFORMATION
Part No. Package Range TC901COA 8-Pin SOIC 0 °C to +70°C TC901CPA 8-Pin Plastic DIP 0 °C to +70°C Dual Auto-Zeroed Operational Amplifiers
Dual Auto-Zeroed Operational Amplifiers TC901- 7 9/5/96 © 2001 Microchip Technology Inc. DS21480A ELECTRICAL CHARACTERISTICS: VS ±15V, TA = +25°C, unless otherwise indicated. Symbol Parameter Test Conditions Min Typ Max Units VOS Input Offset Voltage T A = +25°C— 7 1 5 µV (Figure 2) TCV OS Average Temperature 0 °C ≤ TA ≤ +70°C — 0.05 0.15 µV/°C Coefficient of Input (Note 1) Offset Voltage IBIAS Average Input Bias T A = +25°C — 30 50 pA Current 0 °C ≤ TA ≤ +70°C — 0.2 10 nA IOS Average Input T A = +25°C — 50 100 pA Offset Current T A = +85°C— — 1 n A eN Input Voltage Noise 0.1 to 1Hz, R S ≤ 100Ω — 1.2 — µVP-P (Figure 1B) eN Input Voltage Noise 0.1 to 10Hz, R S ≤ 100Ω —5— µVP-P (Figure 1A) CMRR Common-Mode Rejection V SS ≤ VCM ≤ VDD – 2V 120 140 — dB Ratio CMVR Common-Mode Voltage V S = ±5V to ±15V V SS —V DD –2 V Range AOL Open-Loop Voltage Gain R L = 10kΩ , VS = ±15V 120 140 — dB VOUT Output Voltage Swing R L = 10kΩ VSS + 1 — V DD –1.2 V BW Closed-Loop Bandwidth Closed-Loop Gain = +1 — 0.8 — MHz (Figure 7) SR Slew Rate R L = 10 kW, CL = 50pF — 2 — V/ µsec PSRR Power Supply Rejection Ratio V S = ±5V to ±15V 120 140 — dB VS Operating Supply Voltage Note 2 ±3— ±16 V Range IS Quiescent Supply (Figure 2) V S = ±15V — 0.45 0.6 mA NOTES: 1. Characterized; not 100% tested. 2. Single supply operation: VDD = +5V to +32V. ABSOLUTE MAXIMUM RATINGS* Operating Temperature Range Package Power Dissipation (TA ≤ 70°C) *Static-sensitive device. Appropriate precautions should be taken when handling, shipping, or storing these devices. Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the devices. These are stress ratings only and functional operation of the device at these or any other conditions above those indicated in the operational sections of the specifications is not implied.
Figure 7. Unwanted Thermocouple Errors Eliminated by Reducing avoid triggering the p-n-p-n structure. stabilized amplifiers, such as the 7650, 7652 and 1052. stabilized amplifiers in existing circuits. removed when retrofitting existing equipment designs. reduced, while reliability and performance are improved. The TC901 recovers quickly from output saturation. many times larger than the TC901's offset voltage drift. trolled, system performance will be less than optimum. common 64% Sn/36% Pb solder at a copper junction. zero, canceling errors (Figure 7). mize thermocouple-induced errors.
Figure 1. Input Voltage Noise Figure 3. Recovery From Negative Saturation Figure 2. VOS and IDD vs Supply Voltage Figure 4. Recovery From Positive Saturation Figure 5. Saturation Test Circuit
5 V/DIV
Figure 6. Phase-Gain
2 V/DIV
Dual Auto-Zeroed Operational Amplifiers TC901- 7 9/5/96© 2001 Microchip Technology Inc. DS21480A Dimensions: inches (mm) .050 (1.27) TYP. 8° MAX. .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) .007 (0.18) .050 (1.27) .016 (0.40) PACKAGE DIMENSIONS 3° MIN. PIN 1 .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) .008 (0.20) .310 (7.87) .290 (7.37) .400 (10.16) .310 (7.87) 8-Pin SOIC Narrow 8-Pin Plastic Dip
Dual Auto-Zeroed Operational Amplifiers TC901- 7 9/5/96 © 2001 Microchip Technology Inc. DS21480A 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 Microchipís 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, except as maybe explicitly expressed herein, under any intellec- reserved. All other trademarks mentioned herein are the property of their respective companies. All rights reserved. © 2001 Microchip Technology Incorporated. Printed in the USA. 1/01 Printed on recycled paper. AMERICAS Corporate Office 2355 West Chandler Blvd. Chandler, AZ 85224-6199 Tel: 480-792-7200 Fax: 480-792-7277 Technical Support: 480-792-7627 Web Address: http://www.microchip.com Rocky Mountain 2355 West Chandler Blvd. Chandler, AZ 85224-6199 Tel: 480-792-7966 Fax: 480-792-7456 Atlanta
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