L2720/2/4 ® LOW DROP DUAL POWER OPERATIONAL AMPLIFIERS .. .. .. .. . OUTPUT CURRENT TO 1 A OPERATES AT LOW VOLTAGES SINGLE OR SPLIT SUPPLY LARGE COMMON-MODE AND DIFFERENTIAL MODE RANGE LOW INPUT OFFSET VOLTAGE GROUND COMPATIBLE INPUTS LOW SATURATION VOLTAGE THERMAL SHUTDOWN CLAMP DIODE POWERDIP (8 + 8) MINIDIP (Plastic) DESCRIPTION The L2720, L2722 and L2724 are monolithic integrated circuits in powerdip, minidip and SIP-9 packages, intended for use as power operational amplifiers in a wide range of applications including servo amplifiers and power supplies. They are particularly indicated for driving, inductive loads, as motor and finds applications in compactdisc VCR automotive, etc. The high gain and high output power capability provide superior performance whatever an operational amplifier/power booster combination is required. SIP9 ORDERING NUMBERS : L2720 (Powerdip) L2722 (Minidip) L2724 (SIP9) PIN CONNECTIONS (top views) L2720 July 2003 L2722 L2724 1/10 L2720/2/4 BLOCK DIAGRAM L2720 L2722 L2724 SCHEMATIC DIAGRAM (one section) ABSOLUTE MAXIMUM RATINGS Symbol Value Unit VS Supply Voltage 28 V VS Peak Supply Voltage (50ms) 50 V Vi Input Voltage Vs Vi Differential Input Voltage ±Vs Io DC Output Current Ip Peak Output Current (non repetitive) Ptot Tstg, Tj 2/10 Parameter o o Power Dissipation at Tamb = 80 C (L2720), Tamb = 50 C (L2722) Tcase = 75oC (L2720) Tcase = 50oC (L2724) Storage and Junction Temperature 1 A 1.5 A 1 5 10 W –40 to 150 o C L2720/2/4 THERMAL DATA SIP-9 Powerdip Minidip Rth j-case Thermal Resistance Junction-case Max. 10oC/W 15oC/W 70oC/W Rth j-amb Thermal Resistance Junction-ambient Max. 70oC/W 70oC/W 100oC/W ELECTRICAL CHARACTERISTICS Vs = 24V, Tamb = 25oC unless otherwise specified Symbol Parameter Vs Single Supply Voltage Vs Split Supply Voltage Is Ib Quiescent Drain Current Test Conditions Vs Vo = 2 Min. Max. Unit 4 28 V ±2 ± 14 Input Offset Voltage Ios Input Offset Current SR Slew Rate B Gain-bandwidth Product Ri Input Resistance Gv O.L. Voltage Gain eN Input Noise Voltage IN Input Noise Voltage Vs = 24V 10 15 Vs = 8V 9 15 0.2 1 µA 10 mV 100 V/µs 1.2 MHz 500 f = 100Hz f = 1kHz 70 kΩ 80 60 dB 10 µV 200 pA 66 84 dB dB 60 70 75 80 B = 22Hz to 22kHz Common Mode Rejection f = 1kHz SVR Supply Voltage Rejection f = 100Hz RG = 10kΩ VR = 0.5V Vs = 24V Vs = ±12V Vs = ±6V Vs = ±2.5V to ±12V Ip = 100mA Ip = 500mA 0.7 1 1.5 Vs = ±2.5V to ±12V Ip = 100mA Ip = 500mA 0.3 0.5 1 f = 1KHz RL = 10Ω Gv = 30dB Vs = 24V Vs = 6V 60 60 VDROP(LOW) Cs Channel Separation Tsd Thermal Shutdown Junction Temperature Figure 1 : nA 2 CMR VDROP(HIGH) V mA Input Bias Current Vos Typ. Quiescent Current vs. Supply Voltage V V dB o C 145 FIgure 2 : Open Loop Gain vs. Frequency 3/10 L2720/2/4 Figure 3 : Common Mode Rejection vs. Frequency Figure 4 : Output Swing vs. Load Current (VS = ± 5 V. Figure 5 : Output Swing vs. Load Current (VS = ± 12 V. Figure 6 : Supply Voltage rejection vs. Frequency Figure 7 : Channel Separation vs. Frequency 4/10 L2720/2/4 APPLICATION SUGGESTION In order to avoid possible instability occuring into final stage the usual suggestions for the linear power stages are useful, as for instance : - layout accuracy ; A 100nF capacitor connected between supply pins and ground ; Figure 8 : - boucherot cell (0.1 to 0.2 µF + 1Ω series) between outputs and ground or across the load. With single supply operation, a resistor (1kΩ) between the output and supply pin can be necessary for stability. Bidirectional DC Motor Control with µP Compatible Inputs VS1 = logic supply voltage Must be VS2 > VS1 E1, E2 = logic inputs Figure 9 : Servocontrol for Compact-disc Figure 10 : Capstan Motor Control in Video Recorders Figure 11 : Motor Current Control Circuit Note : The input voltage level is compatible with L291 (8 - BIT D/A converter) 5/10 L2720/2/4 Figure 12 : Bidirectional Speed Control of DC Motors 2R3 . R1 For circuit stability ensure that RX > where RM = internal resistance of motor. RM The voltage available at the terminals of the motor is VM = 2 (VI − ) + |RO|. IM where |RO| = 2 and IM is the motor current. Figure 13 : VHS-VCR Motor Control Circuit 6/10 2R3 . R1 VS RX L2720/2/4 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 0.055 0.020 0.50 D 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 OUTLINE AND MECHANICAL DATA 3.30 0.130 Powerdip 16 Z 1.27 0.050 7/10 L2720/2/4 mm inch DIM. MIN. A TYP. MAX. MIN. 3.32 TYP. MAX. 0.131 a1 0.51 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 0.020 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 3.18 OUTLINE AND MECHANICAL DATA 3.81 1.52 0.125 0.150 0.060 Minidip L2720/2/4 mm DIM. MIN. TYP. A inch MAX. MIN. TYP. 7.1 a1 2.7 3 0.280 0.106 0.118 B 23 0.90 B3 24.8 0.976 b1 0.5 b3 0.85 0.020 1.6 0.033 0.063 C 3.3 0.130 c1 0.43 0.017 c2 1.32 D 0.052 21.2 0.835 d1 14.5 e 2.54 0.100 e3 20.32 0.800 L 0.571 3.1 0.122 L1 3 0.118 L2 17.6 0.693 L3 0.25 L4 OUTLINE AND MECHANICAL DATA MAX. 17.4 17.85 0.010 0.685 0,702 M 3.2 0.126 N 1 0.039 P 0.15 SIP9 0.006 C D L1 L3 c2 N P 1 9 L a1 L2 L4 A d1 M b1 b3 e c 1 e3 B B3 SIP9 9/10 L2720/2/4 Information furnished is believed to be accurate and reliable. However, STMicroelectronics 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 STMicroelectronics. Specification mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. 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