lm2904

April 2008 Rev 11 1/22 22 LM2904 Low power dual operational amplifier Features ■ Internally frequency compensated ■ Large DC voltage gain: 100 dB ■ Wide bandwidth (unity gain): 1.1 MHz (temperature compensated) ■ Very low supply current/op (500 µA) essentially independent of supply voltage ■ Low input bias current: 20 nA (temperature compensated) ■ Low input offset current: 2 nA ■ Input common-mode voltage range includes negative rail ■ Differential input voltage range equal to the power supply voltage ■ Large output voltage swing 0 V to (VCC+ -1.5 V) Description This circuit consists of two independent, high gain, internally frequency compensated operational amplifiers which were designed specifically for automotive and industrial control system. It operates from a single power supply over a wide range of voltages. The low power supply drain is independent of the magnitude of the power supply voltage. Application areas include transducer amplifiers, DC gain blocks and all the conventional op-amp circuits which now can be more easily implemented in single power supply systems. For example, these circuits can be directly supplied from the standard +5 V which is used in logic systems and will easily provide the required interface electronics without requiring any additional power supply. In the linear mode the input common-mode voltage range includes ground and the output voltage can also swing to ground, even though operated from a single power supply. N DIP8 (Plastic package) D SO-8 (Plastic micropackage) P TSSOP8 (Thin shrink small outline package) S MiniSO-8 Pin connections (top view) www.st.com Table of contents LM2904 2/22 Table of contents 1 Schematic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Absolute maximum ratings and operating conditions . . . . . . . . . . . . . 4 3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Typical single-supply applications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 4 Macromodel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 4.1 Important note concerning this macromodel . . . . . . . . . . . . . . . . . . . . . . 13 4.2 Macromodel code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 5 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 5.1 DIP8 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 5.2 SO-8 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 5.3 TSSOP8 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 5.4 MiniSO-8 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 6 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 LM2904 Schematic diagram 3/22 1 Schematic diagram Figure 1. Schematic diagram (1/2 LM2904) 6μA 4μA 100μA Q2 Q3 Q4Q1 Inverting input Non-inverting input Q8 Q9 Q10 Q11 Q12 50mA Q13 Output Q7 Q6 Q5 R SC VCC C C GND Absolute maximum ratings and operating conditions LM2904 4/22 2 Absolute maximum ratings and operating conditions Table 1. Absolute maximum ratings (AMR) Symbol Parameter Value Unit VCC Supply voltage (1) 1. All voltage values, except differential voltage are with respect to network ground terminal. ±16 or 32 V Vid Differential input voltage(2) 2. Differential voltages are the non-inverting input terminal with respect to the inverting input terminal. ±32 V Vin Input voltage -0.3 to 32 V Output short-circuit duration (3) 3. Short-circuits from the output to VCC can cause excessive heating if Vcc+ > 15 V. The maximum output current is approximately 40 mA, independent of the magnitude of VCC. Destructive dissipation can result from simultaneous short-circuits on all amplifiers. Infinite s Iin Input current (4) 4. This input current only exists when the voltage at any of the input leads is driven negative. It is due to the collector-base junction of the input PNP transistor becoming forward biased and thereby acting as input diodes clamps. In addition to this diode action, there is also NPN parasitic action on the IC chip. This transistor action can cause the output voltages of the op-amps to go to the VCC voltage level (or to ground for a large overdrive) for the time duration than an input is driven negative. This is not destructive and normal output will set up again for input voltage higher than -0.3 V. 50 mA Toper Operating free-air temperature range -40 to +125 °C Tstg Storage temperature range -65 to +150 °C Tj Maximum junction temperature 150 °C Rthja Thermal resistance junction to ambient(5) SO-8 TSSOP8 DIP8 MiniSO-8 5. Short-circuits can cause excessive heating and destructive dissipation. Values are typical. 125 120 85 190 °C/W Rthjc Thermal resistance junction to case(5) SO-8 TSSOP8 DIP8 MiniSO-8 40 37 41 39 °C/W ESD HBM: human body model(6) 6. Human body model: A 100 pF capacitor is charged to the specified voltage, then discharged through a 1.5 kΩ resistor between two pins of the device. This is done for all couples of connected pin combinations while the other pins are floating. 300 V MM: machine model(7) 7. Machine model: A 200 pF capacitor is charged to the specified voltage, then discharged directly between two pins of the device with no external series resistor (internal resistor < 5 Ω). This is done for all couples of connected pin combinations while the other pins are floating. 200 V CDM: charged device model(8) 8. Charged device model: all pins and the package are charged together to the specified voltage and then discharged directly to the ground through only one pin. This is done for all pins. 1.5 kV LM2904 Absolute maximum ratings and operating conditions 5/22 Table 2. Operating conditions Symbol Parameter Value Unit VCC Supply voltage 3 to 30 V Vicm Common mode input voltage range VCC+ - 1.5 V Toper Operating free-air temperature range -40 to +125 °C Electrical characteristics LM2904 6/22 3 Electrical characteristics Table 3. VCC+ = 5V, VCC- = Ground, VO = 1.4V, Tamb = 25°C (unless otherwise specified) Symbol Parameter Min. Typ. Max. Unit Vio Input offset voltage (1) Tamb = 25°C Tmin ≤ Tamb ≤ Tmax 2 7 9 mV DVio Input offset voltage drift 7 30 µV/°C Iio Input offset current Tamb = 25°C Tmin ≤ Tamb ≤ Tmax 2 30 40 nA DIio Input offset current drift 10 300 pA/°C Iib Input bias current (2) Tamb = 25°C Tmin ≤ Tamb ≤ Tmax 20 150 200 nA Avd Large signal voltage gain VCC+ = +15V,RL=2kΩ, Vo = 1.4V to 11.4V Tamb = 25°C Tmin ≤ Tamb ≤ Tmax 50 25 100 V/mV SVR Supply voltage rejection ratio (RS ≤10kΩ) Tamb = 25°C Tmin ≤ Tamb ≤ Tmax 65 65 100 dB ICC Supply current, all amp, no load Tamb = 25°C, VCC+ = +5V Tmin ≤ Tamb ≤ Tmax, VCC+ = +30V 0.7 1.2 2 mA Vicm Input common mode voltage range (VCC+= +30V) (3) Tamb = 25°C Tmin ≤ Tamb ≤ Tmax 0 0 VCC+ -1.5 VCC+ -2 V CMR Common-mode rejection ratio (RS = 10kΩ) Tamb = 25°C Tmin ≤ Tamb ≤ Tmax 70 60 85 dB Isource Output short-circuit current VCC+ = +15V, Vo = +2V, Vid = +1V 20 40 60 mA Isink Output sink current VO = 2V, VCC+ = +5V VO = +0.2V, VCC+ = +15V 10 12 20 50 mA µA VOH High level output voltage (VCC+ = + 30V) Tamb = +25°C, RL = 2kΩ Tmin ≤ Tamb ≤ Tmax Tamb = +25°C, RL = 10kΩ Tmin ≤ Tamb ≤ Tmax 26 26 27 27 27 28 V VOL Low level output voltage (RL = 10kΩ) Tamb = +25°C Tmin ≤ Tamb ≤ Tmax 5 20 20 mV LM2904 Electrical characteristics 7/22 SR Slew rate VCC+ = 15V, Vin = 0.5 to 3V, RL = 2kΩ, CL = 100pF, unity gain Tmin ≤ Tamb ≤ Tmax 0.3 0.2 0.6 V/µs GBP Gain bandwidth product f = 100kHz VCC+ = 30V, Vin = 10mV, RL = 2kΩ, CL = 100pF 0.7 1.1 MHz THD Total harmonic distortion f = 1kHz, AV = 20dB, RL = 2kΩ, Vo = 2Vpp, CL = 100pF, VCC+ = 30V 0.02 % en Equivalent input noise voltage f = 1kHz, RS = 100Ω, VCC+ = 30V 55 nV/√Hz VO1/VO2 Channel separation (4) 1kHz ≤ f ≤ 20kHz 120 dB 1. VO = 1.4V, RS = 0Ω, 5V < VCC+ < 30V, 0V < Vic < VCC+ - 1.5V. 2. The direction of the input current is out of the IC. This current is essentially constant, independent of the state of the output, so there is no change in the loading charge on the input lines. 3. The input common-mode voltage of either input signal voltage should not be allowed to go negative by more than 0.3 V. The upper end of the common-mode voltage range is VCC+ –1.5 V, but either or both inputs can go to +32 V without damage. 4. Due to the proximity of external components ensure that stray capacitance does not cause coupling between these external parts. This typically can be detected at higher frequencies because this type of capacitance increases. Table 3. VCC+ = 5V, VCC- = Ground, VO = 1.4V, Tamb = 25°C (unless otherwise specified) Symbol Parameter Min. Typ. Max. Unit Electrical characteristics LM2904 8/22 Figure 2. Open loop frequency response Figure 3. Large signal frequency response VO LT AG E G AI N (dB ) 1.0 10 100 1k 10k 100k 1M 10M VCC = +10 to + 15V & FREQUENCY (Hz) 10MΩ VI VCC/2 VCC = 30V & 0.1μF VCC VO- + -55°C Tamb +125°C 140 120 100 80 60 40 20 0 -55°C Tamb +125°C FREQUENCY (Hz) 1k 10k 100k 1M O UT PU T SW IN G (V pp ) +7V 2k Ω 1k Ω 100k Ω +15V VO - + VI 20 15 10 5 0 Figure 4. Voltage follower pulse response Figure 5. Output characteristics IN PU T VO LT AG E (V ) O UT PU T VO LT AG E (V ) 0 10 20 30 40 TIME (μs) RL 2 kΩ VCC = +15V 4 3 2 1 0 3 2 1 OUTPUT SINK CURRENT (mA) 0,001 0,01 0,1 1 10 100 O U TP U T VO LT AG E (V ) VCC = +5V VCC = +15V VCC = +30V - IO VO Tamb = +25°C vcc/2 vcc + 10 1 0.1 0.01 Figure 6. Voltage follower pulse response Figure 7. Output characteristics � � � � � � � � � � � � � � � � ������������������������������������������������������������������������� �� !" � # $ %�&��'( � (( %������ �!" !" ) � ) * �� � & + ������ � ,� ��� ��� ��� ��� ��� ��� � � � � � � � � � � � � � � � � � � � � ( � - � � � � ( ( & � � � � �/�� �/� � ��������������� �/��� ��0)�)�0)���12�� (( � # � �%�&��'( & + � (( � � � � � (( 3� �����������(��(�������� � � � � � � � � � LM2904 Electrical characteristics 9/22 Figure 8. Input current versus temperature Figure 9. Current limiting � � � � � � ( � � � � � � � � � +�� +�� +�� � �� �� �� �������� ��� � � �%���� � (( �%�&���� � (( �%�&���� � (( �%�&��� ������ ������'(� 4� �� �� �� �� �� �� �� �� � � � � � � � � ( � � � � � � � � � + & � � ������ ������'(� 4� �� �� �� �� �� �� �� �� � +�� +�� +�� � �� �� �� �������� ��� Figure 10. Input voltage range Figure 11. Supply current � � � � � � � � � � � � � � � � � �� �� �����������5����� ���6�� �78#�9:) �1,9�9:) �� �� � � � � � � 5 � ( � � � � � � � � � � �� �� �� � # � �%�+��'( � (( � � + & � # � �%��'(��1�&���'( ��������������5����� ����� � � � � Figure 12. Voltage gain Figure 13. Input current versus supply voltage 0 10 20 30 40 POSITIVE SUPPLY VOLTAGE (V) VO LT AG E G AI N (dB ) 160 120 80 40 LR = 20kΩ LR = 2k Ω ������������������������������������������������� ��������������5����� ����� � � � � � � ( � � � � � � � � � � ��� ���� ����� ����� ��� # $ ������%�&��'( Electrical characteristics LM2904 10/22 Figure 14. Gain bandwidth product Figure 15. Power supply rejection ratio Figure 16. Common mode rejection ratio Figure 17. Phase margin vs capacitive load ��+��+��+��������������������������� ������ ������'(� � � � ; � � � � � � . � � � � � � ( � � � � . < � (( ������%�������� �=� �=�� �=� �=�� �=4 �=�� �=� �=�� �=� �=�� � ��+��+��+��������������������������� ������ ������'(� � � � � � � � � � � � 5 � � � > � ( � � � � � � � � � � � � ; � ��� ��� ��� ��� ��� 4� 4� �� �� �� �� �� �� ��+��+��+��������������������������� ������ ������'(� ( � � � � � � � � � � � � � � � ( � � � � � � � � � � � � � ��� ��� ��� ��� 4� 4� �� �� �� �� �� �� Phase Margin at Vcc=15V and Vicm=7.5V Vs. Iout and Capacitive load value LM2904 Electrical characteristics 11/22 Typical single-supply applications Figure 18. AC coupled inverting amplifier Figure 19. AC coupled non-inverting amplifier 1/2 LM2904 ~ 0 2VPP R 10kΩ L Co eo R 6.2kΩ B R 100kΩ f R1 10kΩCI eI VCC R2 100kΩ C1 10μF R3 100kΩ A = - R R1V f (as shown A = -10)V 1/2 LM2904 ~ 0 2VPP R 10k Ω L Co eo R 6.2kΩ B C1 0.1μF eI VCC (as shown A = 11)V A = 1 +R2 R1V R1 100kΩ R2 1MΩ CI R3 1MΩ R4 100kΩ R5 100kΩ C2 10μF Figure 20. Non-inverting DC gain Figure 21. DC summing amplifier R1 10kΩ R2 1MΩ 1/2 LM2904 10kΩ eI eO +5V e O (V ) (mV)0 AV= 1 + R2 R1 (As shown = 101)AV 1/2 LM2904 eO e 4 e 3 e 2 e 1 100kΩ 100kΩ 100kΩ 100kΩ 100kΩ 100kΩ eo = e1 + e2 - e3 - e4 where (e1 + e2) (e3 + e4) to keep eo 0V ≥ ≥ Figure 22. High input Z, DC differential amplifier Figure 23. Using symmetrical amplifiers to reduce input current + 1/2 LM2904 R1 100kΩ R2 100kΩ R4 100kΩ R3 100kΩ +V2 V1 Vo 1/2 LM2904 If R1 = R5 and R3 = R4 = R6 = R7 eo = [ 1 + ] (e2 - e1) As shown eo = 101 (e2 - e1) 2R1 R2 IB 2N 929 0.001μF IB 3MΩ IB eoI I e I IB IB Input current compensation 1.5MΩ 1/2 LM2904 1/2 LM2904 Electrical characteristics LM2904 12/22 Figure 24. Low drift peak detector Figure 25. Active bandpass filter 1/2 LM2904 IB 2N 929 0.001μF IB 3R 3MΩ IB Input current compensation eo IB e I Zo ZI C 1μ F 2IB R 1M Ω 2IB 1/2 LM2904 1/2 LM2904 1/2 LM2904 R8 100kΩ C3 10μF R7 100kΩ R5 470kΩ C1 330pF Vo VCC R6 470kΩ C2 330pF R4 10MΩ R1 100kΩ R2 100kΩ +V1 R3 100kΩ 1/2 LM2904 1/2 LM2904 Fo = 1kHz Q = 50 Av = 100 (40dB) LM2904 Macromodel 13/22 4 Macromodel 4.1 Important note concerning this macromodel Please consider the following remarks before using this macromodel. ● All models are a trade-off between accuracy and complexity (i.e. simulation time). ● Macromodels are not a substitute to breadboarding; rather, they confirm the validity of a design approach and help to select surrounding component values. ● A macromodel emulates the nominal performance of a typical device within specified operating conditions (temperature, supply voltage, for example). Thus the macromodel is often not as exhaustive as the datasheet, its purpose is to illustrate the main parameters of the product. Data derived from macromodels used outside of the specified conditions (VCC, temperature, for example) or even worse, outside of the device operating conditions (VCC, Vicm, for example), is not reliable in any way. 4.2 Macromodel code ** Standard Linear Ics Macromodels, 1993. ** CONNECTIONS : * 1 INVERTING INPUT * 2 NON-INVERTING INPUT * 3 OUTPUT * 4 POSITIVE POWER SUPPLY * 5 NEGATIVE POWER SUPPLY .SUBCKT LM2904 1 2 3 4 5 *************************** .MODEL MDTH D IS=1E-8 KF=3.104131E-15 CJO=10F * INPUT STAGE CIP 2 5 1.000000E-12 CIN 1 5 1.000000E-12 EIP 10 5 2 5 1 EIN 16 5 1 5 1 RIP 10 11 2.600000E+01 RIN 15 16 2.600000E+01 RIS 11 15 2.003862E+02 DIP 11 12 MDTH 400E-12 DIN 15 14 MDTH 400E-12 VOFP 12 13 DC 0 VOFN 13 14 DC 0 IPOL 13 5 1.000000E-05 CPS 11 15 3.783376E-09 DINN 17 13 MDTH 400E-12 VIN 17 5 0.000000e+00 DINR 15 18 MDTH 400E-12 VIP 4 18 2.000000E+00 FCP 4 5 VOFP 3.400000E+01 FCN 5 4 VOFN 3.400000E+01 FIBP 2 5 VOFN 2.000000E-03 Macromodel LM2904 14/22 FIBN 5 1 VOFP 2.000000E-03 * AMPLIFYING STAGE FIP 5 19 VOFP 3.600000E+02 FIN 5 19 VOFN 3.600000E+02 RG1 19 5 3.652997E+06 RG2 19 4 3.652997E+06 CC 19 5 6.000000E-09 DOPM 19 22 MDTH 400E-12 DONM 21 19 MDTH 400E-12 HOPM 22 28 VOUT 7.500000E+03 VIPM 28 4 1.500000E+02 HONM 21 27 VOUT 7.500000E+03 VINM 5 27 1.500000E+02 EOUT 26 23 19 5 1 VOUT 23 5 0 ROUT 26 3 20 COUT 3 5 1.000000E-12 DOP 19 25 MDTH 400E-12 VOP 4 25 2.242230E+00 DON 24 19 MDTH 400E-12 VON 24 5 7.922301E-01 .ENDS LM2904 Package information 15/22 5 Package information In order to meet environmental requirements, STMicroelectronics offers these devices in ECOPACK® packages. These packages have a lead-free second level interconnect. The category of second level interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an STMicroelectronics trademark. ECOPACK specifications are available at: www.st.com. Package information LM2904 16/22 5.1 DIP8 package information Figure 26. DIP8 package mechanical drawing Table 4. DIP8 package mechanical data Ref. Dimensions Millimeters Inches Min. Typ. Max. Min. Typ. Max. A 5.33 0.210 A1 0.38 0.015 A2 2.92 3.30 4.95 0.115 0.130 0.195 b 0.36 0.46 0.56 0.014 0.018 0.022 b2 1.14 1.52 1.78 0.045 0.060 0.070 c 0.20 0.25 0.36 0.008 0.010 0.014 D 9.02 9.27 10.16 0.355 0.365 0.400 E 7.62 7.87 8.26 0.300 0.310 0.325 E1 6.10 6.35 7.11 0.240 0.250 0.280 e 2.54 0.100 eA 7.62 0.300 eB 10.92 0.430 L 2.92 3.30 3.81 0.115 0.130 0.150 LM2904 Package information 17/22 5.2 SO-8 package information Figure 27. SO-8 package mechanical drawing Table 5. SO-8 package mechanical data Ref. Dimensions Millimeters Inches Min. Typ. Max. Min. Typ. Max. A 1.75 0.069 A1 0.10 0.25 0.004 0.010 A2 1.25 0.049 b 0.28 0.48 0.011 0.019 c 0.17 0.23 0.007 0.010 D 4.80 4.90 5.00 0.189 0.193 0.197 E 5.80 6.00 6.20 0.228 0.236 0.244 E1 3.80 3.90 4.00 0.150 0.154 0.157 e 1.27 0.050 h 0.25 0.50 0.010 0.020 L 0.40 1.27 0.016 0.050 k 1° 8° 1° 8° ccc 0.10 0.004 Package information LM2904 18/22 5.3 TSSOP8 package information Figure 28. TSSOP8 package mechanical drawing Table 6. TSSOP8 package mechanical data Ref. Dimensions Millimeters Inches Min. Typ. Max. Min. Typ. Max. A 1.2 0.047 A1 0.05 0.15 0.002 0.006 A2 0.80 1.00 1.05 0.031 0.039 0.041 b 0.19 0.30 0.007 0.012 c 0.09 0.20 0.004 0.008 D 2.90 3.00 3.10 0.114 0.118 0.122 E 6.20 6.40 6.60 0.244 0.252 0.260 E1 4.30 4.40 4.50 0.169 0.173 0.177 e 0.65 0.0256 k 0° 8° 0° 8° L 0.45 0.60 0.75 0.018 0.024 0.030 L1 1 0.039 aaa 0.1 0.004 LM2904 Package information 19/22 5.4 MiniSO-8 package information Figure 29. MiniSO-8 package mechanical drawing Table 7. MiniSO-8 package mechanical data Ref. Dimensions Millimeters Inches Min. Typ. Max. Min. Typ. Max. A 1.1 0.043 A1 0 0.15 0 0.006 A2 0.75 0.85 0.95 0.030 0.033 0.037 b 0.22 0.40 0.009 0.016 c 0.08 0.23 0.003 0.009 D 2.80 3.00 3.20 0.11 0.118 0.126 E 4.65 4.90 5.15 0.183 0.193 0.203 E1 2.80 3.00 3.10 0.11 0.118 0.122 e 0.65 0.026 L 0.40 0.60 0.80 0.016 0.024 0.031 L1 0.95 0.037 L2 0.25 0.010 k 0° 8° 0° 8° ccc 0.10 0.004 Ordering information LM2904 20/22 6 Ordering information Table 8. Order codes Order code Temperature range Package Packing Marking LM2904N -40°C to +125°C DIP8 Tube LM2904N LM2904D/DT SO-8 Tube ortape & reel 2904 LM2904PT TSSOP8(Thin shrink outline package) Tape & reel LM2904ST MiniSO-8 Tape & reel K403 LM2904YD(1) LM2904YDT(1) SO-8 (Automotive grade level) Tube or tape & reel 2904Y LM2904YPT(2) TSSOP8 (Automotive grade level) Tape & reel LM2904YST(2) MiniSO-8(Automotive grade level) Tape & reel K409 1. Qualified and characterize