NTE1852 Integrated Circuit 4W Audio Amplifier with DC Volume Control Description: The NTE1852 is a monolithic integrated 4W audio Amplifier circuit with DC volume control in a 9−pin single in−line (SIP) plastic package. The wide supply voltage range makes this circuit very suitable for applications such as television receivers and record players. The DC volume control stage has a logarithmic control characteristic with a range of more than 80dB. Control can be obtained by means of a variable DC voltage between 3.5 and 8V. The audio amplifier has a well−defined open−loop gain and a fixed integrated closed−loop gain. This offers an optimum in number of external components, performance and stability Features: D DC volume control D SIP package D Low distortion D Logarithmic control Applications: D Computers D Intercom D AM/FM Radio D Television D Modems Absolute Maximum Ratings: (TA = +25°C unless otherwise specified) Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35V Non−repetitive peak output current, IOSM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3A Repetitive peak output current, IORM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5A Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65 to +150°C Total Power Dissipation, PTOT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see derating curve DC and AC Electrical Characteristics: (VCC = 18V; RL = 8Ω; f = 1kHz; TA = 25°C, unless otherwise specified) Parameter Symbol Min Typ Max Unit Supply Voltage VCC 15 − 35 V Total quiescent current ITOT − 35 − mA Parameter Symbol Min Typ Max Unit Noise output voltage (see note) Vn − − 1.4 mV Total sensitivity (DC control at maximum gain for PO = 2.5W) Vi 38 55 69 mV Frequency response (−3dB) f 35Hz − 20 kHz IORM − − 1.5 A PO 4 4.5 − W dTOT − 0.5 1 % Voltage gain AV − 30 − dB Sensitivity for PO = 2.5W Vi 100 125 160 mV ⎪ZI⎪ 100 250 500 kΩ Gain Control Range φ 80 − − dB Signal handling at dTOT < 1% (DC control at 0dB) sensitivity for VO = 125mV at maximum voltage gain Vi Vi 1.2 − − 55 − − V mV Input impedance (Pin 8) ⎪ZI⎪ 100 250 − kΩ Output impedance (Pin 6) ⎪ZO⎪ 100 200 400 Ω AUDIO AMPLIFIER Repetitive peak output current Output power at dTOT = 10% Total harmonic distortion at PO = 2.5W Input impedance (Pin 5) DC VOLUME CONTROL UNIT RS = 5kΩ and DC control at minimum gain. .827 (21.0) 9 DC Control Amp GND 8 DC Control Amp Input 7 Control Voltage 6 DC Control Voltage 5 Power Amp Input 4 Bypass 3 VCC Power Amp Output 1 Power Amp GND .065 (1.68) .242 (6.1) .228 .728 (5.8) (18.5) 9 1 .134 (3.42) .100 (2.54) 2 .130 (3.3) Dia .590 (15.0) Seating Plane Note: .250 (6.35) .169 (4.3) .118 (3.0) Min .140 (3.56) .886 (22.0)