NTE1241 Integrated Circuit Head Coil/Meter Driver Absolute Maximum Ratings: (TA = +25°C unless otherwise specified) Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15V Power Dissipation, PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 550mW Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −25° to +75°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −55° to +125°C Electrical Characteristics: (TA = +25°C, VCC = 5V, f = 1kHz unless otherwise specified) Parameter Voltage Gain Symbol GVO Test Conditions Min Typ Max Unit S1, S2, S3 = 1 18.0 22.5 27.0 dB S1 = 2, S3 = 1 21.5 25.5 29.5 dB 250 460 − µA Output Current IOM S1, S3 = 1, S2 = 2, RL = 1kΩ, THD = 3% Inout Impedance Zin S1, S2 = 1, S3 = 2 5 22 − kΩ S1 = 2, S3 = 2 5 22 − kΩ 12 17 − kΩ Output Impedance Zout S1, S2, S3 = 1 Load Impedance Z3−4 Pin3 to Pin4 0.75 1.2 1.8 kΩ Output Voltage VOM S1, S3 = 1, THD = 10% 0.6 0.8 − V Supply Current ICC 3.2 5.0 9.0 mA Pin Connection Diagram (Front View) .689 (17.5) Max .245 (6.2) Max 7 VCC 6 Meter Output 5 Meter Input 4 GND 3 Gain Adjust 2 Head Input 1 Head Output .126 (3.2) Max .197 (5.0) 1 7 .190 (4.8) .099 (2.5) .590 (15.0)