NTE824 Integrated Circuit Low Noise Dual Preamplifier Description: The NTE824 is a dual preamplifier for the amplification of low level signals in applications requiring optimum noise performance. Each of the two amplifiers is completely independent, with an internal power supply decoupler–regulator, providing 110dB supply rejection and 60dB channel separation. Other outstanding features include high gain (104dB), large output voltage swing (VCC –2V)p–p, and wide power bandwidth (75kHz, 20Vp–p). The device operates from a single supply across the wide range of 9V to 30V. The amplifiers are internally compensated for gains greater than 10. Features: D Low Noise: 1.0µV Total Input Noise D High Gain: 104dB Open Loop D Single Supply Operation D Wide Supply Range: 9V to 30V D Power Supply Rejection: 110dB D Large Output Voltage Swing (VCC–2V)p–p D Wide Bandwidth 15MHz Unity Gain D Power Bandwidth 75kHz, 20Vp–p D Internally Compensated D Short Circuit Protected Absolute Maximum Ratings: Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +30V Power Dissipation (Note 1), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 660mW Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0° to +70°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65° to +150°C Lead Temperature (During Soldering, 10sec), TL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +300°C Note 1 For operation in ambient temperatures above 25°C, the device must be derated based on a 150°C maximum junction temperature and a thermal resistance of 187°C/W junction to ambient. Electrical Characteristics: (TA = +25°C, VCC = 14V, unless otherwise specified) Parameter Test Conditions Min Typ Max Unit Voltage Gain Open Loop, f = 100Hz – 160,000 – Supply Current VCC = 9V to 30V, RL = ∞ – 10 – mA 50 100 – kΩ – 200 – kΩ – 0.5 3.1 µA Input Resistance Positive Input Negative Input Input Current, Negative Input Output Resistance Open Loop – 150 – Ω Output Current Source – 8 – mA Sink – 2 – mA Peak–to–Peak – VCC–2 – V – 15 – MHz Output Voltage Swing Unity Gain Bandwidth Large Signal Frequency Response 20VP–P (VCC > 24V), THD ≤ 1% – 75 – kHz Maximum Input Voltage Linear Operation – – 300 mVrms Supply Rejection Ratio Input Referred f = 1kHz – 110 – dB Channel Separation f = 1kHz 40 60 – dB Total Harmonic Distortion 60dB Gain, f = 1kHz – 0.1 0.5 % Total Equivalent Input Noise (Flat Gain Circuit) 10 to 10,000Hz – 1.0 1.2 µVrms Pin Connection Diagram (+) Input 1 1 8 (+) Input 2 (–) Input 1 2 7 (–) Input 2 6 VCC GND 3 Output 1 4 8 5 Output 2 5 .260 (6.6) 1 4 .390 (9.9) Max .300 (7.62) .155 (3.93) .100 (2.54) .145 (3.68) .300 (7.62)