NTE7221 Integrated Circuit Dual 5W Audio Power Amp w/Stand−By & Volume Function Description: The NTE7221 is an integrated circuit in a 12−Lead SIP type package. This BTL 5W/Ch Power Amplifier has both stand−by and volume functions which make it an excellant choice for lo frequency amplifier applications. Absolute Maximum Ratings: (TA = +25°C unless otherwise specified) Supply Voltage (At No Signal), VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14.4V Supply Current, ICC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.0A Power Dissipation (TA = +70°C), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.92W Operating Ambient Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −25° to +70°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −55° to +150°C Electrical Characteristics: (VCC = 8V, f = 1kHz, RL = 8Ω, TA = +25°C unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit Quiescent Circui Current ICQ Vin = 0V, VO1 = 0V − 45 100 mA Stand−By Current ISTB Vin = 0V, VO1 = 0V − 1 10 μA Output Noise Voltage VNO Rg = 10kΩ, VO1 = 0V, Note 1 − 0.1 0.4 mVrms Voltage Gain GV PO = 0.5W, VO1 = 1.25V 31 33 35 dB Total Harmonic Distortion THD PO = 0.5W, VO1 = 1.25V − 0.1 0.5 % Maximum Power Output PO THD = 10%, VO1 = 1.25V 2.4 3.0 − W VCC = 11V, THD = 10%, VO1 = 1.25V 4.0 5.0 − W 30 50 − dB −250 0 250 mV Ripple Rejection Ratio RR Rg = 10kΩ, VO1 = 0V, Vr = 0.5Vrms, f = 120Hz, Note 1 Output Offset Voltage Voff Rg = 10kΩ, VO1 = 0V Volume Attenuation Ratio Att PO = 0.5W, VO1 = 0V, Note 1 70 85 − dB Channel Balance CB PO = 0.5W, VO1 = 1.25V −1 0 1 dB PO = 0.5W, VO1 = 0.6V −2 0 2 dB GVm PO = 0.5W, VO1 = 0.6V 20.5 CT PO = 0.5W, VO1 = 1.25V 40 55 − dB Middle Voltage Gain Channel Crosstalk 23.5 26.5 dB Stand−By Pin Current ISTB2 Vin = 0V, VSTB = 3V − − 25 μA Volume Pin Current IVOL Vin = 0V, VO1 = 0V −12 − − μA Vin = ±0.3VDC 24 30 36 kΩ Input Impedance Zi Note 1. For this measurement, use the BPF = 15Hz to 30kHz (12dB/OCT) Pin Connection Diagram (Front View) 12 11 10 9 8 7 6 5 4 3 2 1 Ch 2 Output (+) GND (Ch 2 Output) Ch 2 Output (−) Volume Ch 1 Input GND (Input) Ch 1 Input Stand−By Ch 1 Output (−) GND (Ch 1 Output) Ch 1 Output (+) VCC 1.179 (29.96) .138 (3.5) 1.102 (28.0) .071 (1.8) R .142 (3.6) Dia .252 (6.4) .303 (7.7) 1 12 .100 (2.54) .307 (7.8)