TC901 TELCOM | Alldatasheet
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Technical content
3-259TELCOM SEMICONDUCTOR, INC. TC901 MONOLITHIC, AUTO-ZEROED OPERATIONAL AMPLIFIER 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 industry-standard 741 pinout.
FEATURES
n Second-Generation Monolithic, Chopper-Stabilized Op Amp n No External Capacitors Required n Pinout Compatible With ICL7650 n 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 TC901- 7 9/5/96
3-260 TELCOM SEMICONDUCTOR, INC. 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 1 Hz, R S ≤ 100Ω — 1.2 — µVP-P (Figure 1B) eN Input Voltage Noise 0.1 to 10 Hz, 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 = 10 kΩ , VS = ±15V 120 140 — dB VOUT Output Voltage Swing R L = 10 kΩ 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 = 50 pF — 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. MONOLITHIC, AUTO-ZEROED OPERATIONAL AMPLIFIER TC901
3-261TELCOM SEMICONDUCTOR, INC. supplies by 0.3V should not be applied to the device pins. 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.
3-262 TELCOM SEMICONDUCTOR, INC. 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