NTE938 & NTE938M Integrated Circuit Precision Operational Amplifier (OP Amp) Description: The NTE938 and NTE938M operational amplifiers provide high input impedance, low input offsets and temperature drifts, and low noise. This series of amplifiers is particularly useful for applications where highaccuracy and lowdrift performance are essential. In addition, highspeed performance may be improved by employing feedforward compensation techniques to maximize slew rate with- out compromising other performance criteria. The NTE938 and NTE938M offer extremely low input offset voltage and drift specifications allowing usage in even the most critical applications without external offset nulling. Features: Available in Two Packages Styles: 8 Lead Metal Can (NTE938) 8Lead DIP (NTE938M) Operation From a Wide Range of Power Supply Voltages Low Input Bias and Offset Currents Low Input Offset Voltage and Guaranteed Offset Voltage Drift Performance High Input Impedance Absolute Maximum Ratings: (T = +25C unless otherwise specified) A Power Supply Voltage, V , V .................................................... 18V CC EE Input Voltage (Note 2), V ........................................................... 15V I Input Differential Current (Note 2), I .............................................. 10mA ID Output ShortCircuit Duration, t ................................................. Indifinite S Operating Junction Temperature, T J NTE938 .................................................................. +175C NTE938M ................................................................ +150C Operating Ambient Temperature Range, T ..................................... 0 to +70C A Storage Temperature Range, T .......................................... 65 to +150C stg Note 1. NTE938 is a discontinued device and no longer available. Note 2. For supply voltages less than 15V, the maximum input voltage is equal to the supply voltage. Note 3. The inputs are shunted with back toback diodes for over voltage protection. Therefore, excessive current will flow if a differential input voltage in excess of 1.0V is applied between the inputs unless some limiting resistance is used.Electrical Characteristics: (T = +25C, 5V V 15V, 15V V 5V unless otherwise A CC EE specified) Parameter Symbol Test Conditions Min Typ Max Unit Input Offset Voltage V 2.0 7.5 mV IO T = 0 to +70C 10 mV A Input Offset Current I 0.2 1.0 nA IO T = 0 to +70C 1.5 nA A Input Bias Current I 1.5 7.0 nA IB T = 0 to +70C 10 nA A Input Resistance r 10 40 M I Power Supply Currents I , I V = +15V, V = 15V 0.3 0.8 mA CC EE CC EE Large Signal Voltage Gain A V = +15V, V = 15V, V = 10V, 25 300 V/mV VOL CC EE O R 10k L V = +15V, V = 15V, V = 10V, 15 V/mV CC EE O R 10k, T = 0 to +70C L A Average Temperature Coefficient of V /T 0 T +70C 6 30 V/C IO A Input Offset Temperature Average Temperature Coefficient of I /T 2 10 pA/C IO Input Offset Current Input Voltage Range V V = +15V, V = 15V 14 V IR CC EE Common Mode Rejection Ratio CMRR R 50k 80 100 dB S Supply Voltage Rejection Ratio PSRR R 50k 80 96 dB S Output Voltage Range V V = +15V, V = 15V, R = 10k 13 14 V OR CC EE L Pin Connection Diagram NTE938 NTE938M (Top View) N.C. 5 Output V () 6 4 Compensation 1 1 8 Compensation 2 Invert Input 2 7 V (+) V (+) NonInverting Input 7 3 NonInverting Input 3 6 Output 2 8 Compensation 2 Inverting Input V () 4 5 N.C. 1 Compensation 1