TDA7237 QUAD DIFFERENTIAL LINE DRIVER PRODUCT PREVIEW DESCRIPTION The quad differential line driver is a monolithic integrated circuit intended to provide low noise, low distortion voltage gain. Additionally, the signal is converted from a single ended to a differential signal pair for applications reuiring signal isolation from DC grounded. The four channel’s gains are matched within 1dB. DIP18 ORDERING NUMBER: TDA7237 BLOCK DIAGRAM VCC 10µF 10µF C(ext) 18 CH1I 3 GND 5 CH2I 4 BIAS GENERATOR 17 16 CH1 15 14 CH2 13 10µF CH3I 12 7 CH3 11 10µF CH4I 10µF 10 8 CH4 CH1Nout CH2Iout CH2Nout CH3Iout CH3Nout CH4Iout CH4Nout 1,2,6 N.C. November 1995 9 CH1Iout D95AU385 1/5 This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice. TDA7237 ABSOLUTE MAXIMUM RATINGS Symbol VS Parameter Supply Voltage Value Unit 20 V Ptot Tamb Total Power Dissipation Operating Ambient Temperature 750 -40 to 85 mW °C Tstg Storage Temperature -55 to 150 °C PIN CONNECTION N.C. 1 18 CEXT N.C. 2 17 VS CH1I 3 16 CH1IO CH2I 4 15 CH1NO GND 5 14 CH2IO N.C. 6 13 CH2NO CH3I 7 12 CH3IO CH4I 8 11 CH3NO CH4NO 9 10 CH4IO D95AU386 THERMAL DATA Symbol Rth j-pins Parameter Thermal Resistance junction - pins PIN FUNCTIONS N. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 2/5 Name N.C. N.C. CH1I CH2I GND N.C. CH3I CH4I CH4NO CH4IO CH3NO CH3IO CH2NO CH2IO CH1NO CH1IO VS CEXT Function Input to channel one Input to channel two Ground Input to channel three Input to channel four Channel four non inverting output Channel four inverting output Channel three non inverting output Channel three inverting output Channel two non inverting output Channel two inverting output Channel one non inverting output Channel one inverting output Supply Voltage By-pass Capacitor Value Unit 90 °C/W TDA7237 ELECTRICAL CHARACTERISTICS (VCC = 10V; Tamb = 25°C; f = 1KHz, unless otherwise specified.) Symbol VS ZI SVR Isg Parameter 9 Input Impedance 15 11 V 30 KΩ f = 10KHz 45 dB 40 mA all pins each pin 300 20 mA mA all pins 150 RL = 10KW; CL = 1000pF 35 3 Signal to Noise Ratio (1) THD Total Harmonic Distortion VO = 4VRMS; RL = 10KW; CL = 1000pF Channel Separation (2) ZO Gv Unit each pin SR CS 23 Max. Output Short Circuit Current to GND S/N 35 Typ. Supply Voltage Rejection Supply Current Slew Rate VIDC VODC VCDC Min. Supply Voltage Output Short Circuit Current to VCC Is Test Condition 83 91 0.07 mA 50 0.1 mA V/µs dB % 70 80 DC Input Voltage 5.8 6.25 6.6 V DC Output Voltage DC Cext Voltage 3.9 5.8 4.75 6.25 5.3 6.6 V V 15.9 50 16.7 100 17.5 Ω dB pin 18 Output Impedance Voltage Gain dB Notes: 1) Bw = 20Hz to 20KHz with 60dB/decade Rolloff (referred to 1.4VRMS) 2) All input AC grounded via 10µF capacitor 3/5 TDA7237 DIP18 PACKAGE MECHANICAL DATA mm DIM. MIN. a1 0.254 B 1.39 TYP. MAX. MIN. TYP. MAX. 0.010 1.65 0.055 0.065 b 0.45 0.018 b1 0.25 0.010 D 25.4 1.000 E 8.5 0.335 e 2.54 0.100 e3 22.86 0.900 F 7.1 0.280 I 3.93 0.155 L Z 4/5 inch 3.3 0.130 1.34 0.053 TDA7237 Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of SGS-THOMSON Microelectronics. © 1995 SGS-THOMSON Microelectronics All Rights Reserved SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands - Singapore Spain - Sweden - Switzerland - Taiwan - Thaliand - United Kingdom - U.S.A. 5/5