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NTE924 & NTE924M Integrated Circuit Voltage Follower, Operational Amplifier
Description: The NTE924 and NTE924M are monolithic operational amplifiers internally connected as unity-gain non-inverting amplifiers. These devices use super-gain 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: D Available in 8-Lead DIP (NTE924M) and 8-Lead Metal Can (NTE924) Packages D Input Current: 10nA Max Over Temperature D Small Signal Bandwidth: 20MHz D Slew Rate: 30V/s D Supply Voltage Range: 5V to 18V Absolute Maximum Ratings: Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18V Power Dissipation (Note 2), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500mW Input Voltage (Note 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15V Output Short-Circuit Duration (Note 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Indefinite Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to +70C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -65 to +150C Lead Temperature (During Soldering, 10sec), TL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +260C 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, junction-to-ambient, or +45C/W, junction-to-case. The thermal resistance of the NTE924M is +100C/W, junction-to-ambient. Note 3. For supply voltages less than 15V, the absolute maximum input voltage is equal to the supply voltage. Note 4. Continuous short-circuit is allowed for case temperatures to +70C or +55C ambient temperature. 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. RS = 5k min, 14k typical is recommended for dynamic stability in all applications.
Electrical Characteristics: (5V VS 18V, 0 TA +70C unless otherwise specified)
Parameter Input Offset Voltage TA = +25C TA = +25C TA = +25C TA = +25C, VS = 15V, VOUT = 10V, RL = 8k VS = 15V, VOUT = 10V, RL = 10k Output Resistance Supply Current Temperature Drift Output Voltage Swing Supply Voltage Rejection Ratio VS = 15V, RL = 10k, Note 5 5V VS 18V TA = +25C TA = +25C Test Conditions Min - - Input Bias Current - - Input Resistance Input Capacitance Large Signal Voltage Gain 1010 - 0.999 0.999 - - - 10 70 Typ 2.5 - 2.0 - 1012 1.5 0.9999 - 0.75 3.9 10 - 80 Max 7.5 10 7.0 10 - - - - 2.5 5.5 - - - Unit mV mV nA nA
pF V/V V/V
mV V/C V dB
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 (Top View) NTE924M
Booster 5 Output 6 4 V (-) Balance V (+) 7 3 Input N.C. Input V (-) Balance 8 1 Balance 2 N.C. 1 2 3 4 8 7 6 5 Balance V (+) Output Booster
NTE924 .370 (9.39) Dia Max .355 (9.03) Dia Max
.177 (4.5) Max
.492 (12.5) Min
.018 (0.45) Dia Typ 3 4 5 7 6 .200 (5.08) Dia
2 1 45 8
.032 (0.82) NTE924M 8 5
.256 (6.52) Max
1
4
.393 (10.0) Max .150 (3.81)
.300 (7.62)
.100 (2.54) .300 (7.62)
.070 (1.77) Min

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