L272 DUAL POWER OPERATIONAL AMPLIFIERS .. .. .. . OUTPUT CURRENT TO 1 A OPERATES AT LOW VOLTAGES SINGLE OR SPLIT SUPPLY LARGE COMMON-MODE AND DIFFERENTIAL MODE RANGE GROUND COMPATIBLE INPUTS LOW SATURATION VOLTAGE THERMAL SHUTDOWN DESCRIPTION The L272 is a monolithic integrated circuits in Powerdip, Minidip and SO packages intended for use as power operational amplifiers in a wide range of applications including servo amplifiers and power supplies, compacts disc, VCR, etc. The high gain and high output power capability provide superior performance whatever an operational amplifier/power booster combination is required. Powerdip (8 + 8) Minidip SO16 (Narrow) ORDERING NUMBERS : L272 (Powerdip) L272M (Minidip) L272D (SO16 Narrow) PIN CONNECTIONS (top view) L272M January 1995 L272D 1/10 L272 BLOCK DIAGRAMS L272 SCHEMATIC DIAGRAM (one only) 2/10 L272D L272M L272 ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit V Vs Supply Voltage 28 Vi Input Voltage Vs Vi Differential Input Voltage Io DC Output Current 1 A Ip Peak Output Current (non repetitive) 1.5 A Power Dissipation at: Tamb = 80°C (L272), Tamb = 50°C (L272M), Tcase = 90 °C (L272D) Tcase = 75 °C (L272) 1.2 5 W W Operating Temperature Range (L272D) – 40 to 85 °C Storage and Junction Temperature – 40 to 150 °C Ptot Top Tstg, Tj ± Vs THERMAL DATA Symbol Rth j-case Parameter Thermal Resistance Junction-pins Max. Powerdip SO16 Minidip 15 – * 70 o Unit C/W C/W C/W Rth j-amb Thermal Resistance Junction-ambient Max. 70 – 100 o Rth j-alumina Thermal Resistance Junction-alumina Max. – ** 50 – o * Thermal resistance junction-pin 4 ** Thermal resistance junctions-pins with the chip soldered on the middle of an alumina supporting substrate measuring 15x 20mm; 0.65mm thickness and infinite heatsink. ELECTRICAL CHARACTERISTICS (VS = 24V, T amb = 25oC unless otherwise specified) Symbol Parameter Vs Supply Voltage Is Quiescent Drain Current Ib Test Conditions Min. Typ. Max. Unit 28 V 8 7.5 12 11 mA mA 4 VO = VS 2 Vs = 24V Vs = 12V Input Bias Current 0.3 2.5 µA Vos Input Offset Voltage 15 60 mV Ios Input Offset Current 50 250 SR Slew Rate 1 V/µs 350 kHz 70 50 dB dB µV B Gain-bandwidth Product Ri Input Resistance Gv O. L. Voltage Gain f = 100Hz f = 1kHz eN Input Noise Voltage B = 20kHz 10 IN Input Noise Current B = 20kHz 200 pA CRR Common Mode Rejection f = 1kHz 60 75 dB SVR Supply Voltage Rejection f = 100Hz, RG = 10kΩ, VR = 0.5V Vs = 24V Vs = ± 12V Vs = ± 6V 54 70 62 56 Ip = 0.1A Ip = 0.5A 21 Vo Cs d Tsd Output Voltage Swing Channel Separation Distortion Thermal Shutdown Junction Temperature 500 nA f = 1 kHz; RL =10Ω, Gv = 30dB Vs = 24V Vs = ± 6V f = 1kHz, Gv = 3 dB, Vs = 24V, RL = ∞ 60 kΩ dB 23 22.5 V V dB 60 60 0.5 % 145 °C 3/10 L272 Figure 1 : Quiescent Current versus Supply Voltage Figure 2 : Quiescent Drain Current versus Temperature Figure 3 : Open Loop Voltage Gain Figure 4 : Output Voltage Swing versus Load Current Figure 5 : Output Voltage Swing versus Load Current Figure 6 : Supply Voltage Rejection versus Frequency 4/10 L272 Figure 7 : Channel Separation versus Frequency APPLICATION SUGGESTION NOTE In order to avoid possible instability occuring into final stage the usual suggestions for the linear power stages are useful, as for instance : Figure 8 : Common Mode Rejection versus Frequency - layout accuracy ; - a 100nF capacitor corrected between supply pins and ground ; - boucherotcell (0.1 to 0.2 µF + 1 Ω series) between outputs and ground or across the load. Figure 9 : Bidirectional DC Motor Control with µP Compatible Inputs Figure 10 : Servocontrol for Compact-disc Figure 11 : Capstan Motor Control in Video Recorders 5/10 L272 Figure 12 : Motor Current Control Circuit. Note : The input voltage level is compatible with L291 (5-BIT D/A converter). Figure 13 : Bidirectional Speed Control of DC Motors. 2R3 ° R1 where RM = internal resistance of motor. For circuit stability ensure that RX > RM Vs 2R ° R1 ) + Ro ⋅ ΙM where Ro = The voltage available at the terminals of the motor is VM = 2 (Vi ⋅ 2 RX and IM is the motor current. 6/10 L272 POWERDIP 16 PACKAGE MECHANICAL DATA mm DIM. MIN. a1 0.51 B 0.85 b b1 TYP. inch MAX. MIN. TYP. MAX. 0.020 1.40 0.033 0.50 0.38 0.020 0.50 D 0.055 0.015 0.020 20.0 0.787 E 8.80 0.346 e 2.54 0.100 e3 17.78 0.700 F 7.10 0.280 I 5.10 0.201 L Z 3.30 0.130 1.27 0.050 7/10 L272 MINIDIP PACKAGE MECHANICAL DATA mm DIM. MIN. A TYP. MAX. MIN. 3.32 TYP. MAX. 0.131 a1 0.51 0.020 B 1.15 1.65 0.045 0.065 b 0.356 0.55 0.014 0.022 b1 0.204 0.304 0.008 0.012 D E 10.92 7.95 9.75 0.430 0.313 0.384 e 2.54 0.100 e3 7.62 0.300 e4 7.62 0.300 F 6.6 0.260 I 5.08 0.200 L Z 8/10 inch 3.18 3.81 1.52 0.125 0.150 0.060 L272 SO16 NARROW PACKAGE MECHANICAL DATA mm DIM. MIN. TYP. A a1 inch MAX. MIN. TYP. 1.75 0.1 0.069 0.25 a2 MAX. 0.004 0.009 1.6 0.063 b 0.35 0.46 0.014 0.018 b1 0.19 0.25 0.007 0.010 C 0.5 0.020 c1 45° (typ.) D 9.8 10 0.386 0.394 E 5.8 6.2 0.228 0.244 e 1.27 0.050 e3 8.89 0.350 F 3.8 4.0 0.150 0.157 L 0.4 1.27 0.150 0.050 M S 0.62 0.024 8° (max.) 9/10 L272 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. 10/10