NTE924 & NTE924M Integrated Circuit Voltage Follower, Operational Amplifier Description: The NTE924 and NTE924M are monolithic operational amplifiers internally connected as unitygain noninverting amplifiers. These devices use supergain transistors in the input stage to get low bias current without sacrificing speed. Directly interchangeable with the NTE909 and NTE941 series in voltage follower applications, these devices have internal frequency compensation and provision for offset balancing. Features: Available in 8Lead DIP (NTE924M) and 8Lead Metal Can (NTE924) Packages Input Current: 10nA Max Over Temperature Small Signal Bandwidth: 20MHz Slew Rate: 30V/ s Supply Voltage Range: 5V to 18V Absolute Maximum Ratings: Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18V Power Dissipation (Note 2), P . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500mW D Input Voltage (Note 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15V Output ShortCircuit Duration (Note 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Indefinite Operating Temperature Range, T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to +70C opr Storage Temperature Range, T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 to +150C stg Lead Temperature (During Soldering, 10sec), T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +260C L Note 1. The NTE924M is a discontinued device and no longer available. Note 2. For operating at elevated temperatures, the NTE924 must be derated based on a thermal resistance of +150C/W, junctiontoambient, or +45C/W, junctiontocase. The thermal resistance of the NTE924M is +100C/W, junctiontoambient. Note 3. For supply voltages less than 15V, the absolute maximum input voltage is equal to the supply voltage. Note 4. Continuous shortcircuit is allowed for case temperatures to +70C or +55C ambient tem- perature. It is necessary to insert a resistor greater than 2k in series with the input when the amplifier is driven from low impedance sources to prevent damage when the output is shorted. R = 5k min, 14k typical is recommended for dynamic stability in all applications. SElectrical Characteristics: (5V V 18V, 0 T +70C unless otherwise specified) S A Parameter Test Conditions Min Typ Max Unit Input Offset Voltage T = +25C 2.5 7.5 mV A 10 mV Input Bias Current T = +25C 2.0 7.0 nA A 10 nA 10 12 Input Resistance T = +25C 10 10 A Input Capacitance 1.5 pF Large Signal Voltage Gain T = +25C, V = 15V, V = 10V, R = 8k 0.999 0.9999 V/V A S OUT L V = 15V, V = 10V, R = 10k 0.999 V/V S OUT L Output Resistance T = +25C 0.75 2.5 A Supply Current T = +25C 3.9 5.5 mV A Temperature Drift 10 V/C Output Voltage Swing V = 15V, R = 10k , Note 5 10 V S L Supply Voltage Rejection Ratio 5V V 18V 70 80 dB S Note 5. Increased output swing under load can be obtained by connecting an external resistor between the booster and V () terminals. Pin Connection Diagram NTE924 NTE924M (Top View) Booster 5 Output V () 6 4 Balance 1 8 Balance N.C. 2 7 V (+) V (+) Input 3 7 Input 3 6 Output V () 4 5 Booster 2 8 Balance N.C. 1 Balance