LM2904

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) P TSSOP8 (Thin shrink small outline package) N DIP8 (Plastic package) D SO-8 (Plastic micropackage) 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. S MiniSO-8 Pin connections (top view) April 2008 Rev 11 1/22 www.st.com 22 Table of contents LM2904 Table of contents 1 2 3 Schematic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Absolute maximum ratings and operating conditions . . . . . . . . . . . . . 4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Typical single-supply applications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 4 Macromodel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 4.1 4.2 Important note concerning this macromodel . . . . . . . . . . . . . . . . . . . . . . 13 Macromodel code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 5 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 5.1 5.2 5.3 5.4 DIP8 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 SO-8 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 TSSOP8 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 MiniSO-8 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 6 7 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 2/22 LM2904 Schematic diagram 1 Schematic diagram Figure 1. Schematic diagram (1/2 LM2904) V CC 6μ A CC Inverting input Q2 Q1 Q3 Q4 4 μA 100μA Q5 Q6 Q7 R SC Non-inverting input Q11 Output Q13 Q10 Q8 Q9 Q12 A 50m GND 3/22 Absolute maximum ratings and operating conditions LM2904 2 Absolute maximum ratings and operating conditions Table 1. Symbol VCC Vid Vin Supply voltage (1) Differential input voltage Input voltage Output short-circuit duration (3) Iin Toper Tstg Tj Input current (4) (2) Absolute maximum ratings (AMR) Parameter Value ±16 or 32 ±32 -0.3 to 32 Infinite 50 -40 to +125 -65 to +150 150 125 120 85 190 40 37 41 39 300 200 (8) Unit V V V s mA °C °C °C Operating free-air temperature range Storage temperature range Maximum junction temperature Thermal resistance junction to SO-8 TSSOP8 DIP8 MiniSO-8 ambient(5) Rthja °C/W Rthjc Thermal resistance junction to case(5) SO-8 TSSOP8 DIP8 MiniSO-8 HBM: human body model(6) °C/W V V kV ESD MM: machine model(7) CDM: charged device model 1.5 1. All voltage values, except differential voltage are with respect to network ground terminal. 2. Differential voltages are the non-inverting input terminal with respect to the inverting input terminal. 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. 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. 5. Short-circuits can cause excessive heating and destructive dissipation. Values are typical. 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. 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. 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. 4/22 LM2904 Table 2. Symbol VCC Vicm Toper Supply voltage Common mode input voltage range Operating free-air temperature range Absolute maximum ratings and operating conditions Operating conditions Parameter Value 3 to 30 VCC+ - 1.5 -40 to +125 Unit V V °C 5/22 Electrical characteristics LM2904 3 Table 3. Symbol Electrical characteristics VCC+ = 5V, VCC- = Ground, VO = 1.4V, Tamb = 25°C (unless otherwise specified) Parameter Input offset voltage (1) Tamb = 25°C Tmin ≤ Tamb ≤ Tmax Input offset voltage drift Input offset current Tamb = 25°C Tmin ≤ Tamb ≤ Tmax Input offset current drift Input bias current Tamb = 25°C Tmin ≤ Tamb ≤ Tmax Large signal voltage gain , VCC+ = +15V,RL=2kΩ Vo = 1.4V to 11.4V Tamb = 25°C Tmin ≤ Tamb ≤ Tmax Supply voltage rejection ratio (RS ≤10kΩ) Tamb = 25°C Tmin ≤ Tamb ≤ Tmax Supply current, all amp, no load Tamb = 25°C, VCC+ = +5V Tmin ≤ Tamb ≤ Tmax, VCC+ = +30V Input common mode voltage range (VCC+= +30V) (3) Tamb = 25°C Tmin ≤ Tamb ≤ Tmax Common-mode rejection ratio (RS = 10kΩ) Tamb = 25°C Tmin ≤ Tamb ≤ Tmax Output short-circuit current VCC+ = +15V, Vo = +2V, Vid = +1V Output sink current VO = 2V, VCC+ = +5V VO = +0.2V, VCC+ = +15V High level output voltage (VCC+ = + 30V) Tamb = +25°C, RL = 2kΩ Tmin ≤ Tamb ≤ Tmax Tamb = +25°C, RL = 10kΩ Tmin ≤ Tamb ≤ Tmax Low level output voltage (RL = 10kΩ) Tamb = +25°C Tmin ≤ Tamb ≤ Tmax 0 0 70 60 20 85 (2) Min. Typ. Max. Unit Vio DVio Iio DIio Iib 2 7 2 10 20 7 9 30 30 40 300 150 200 mV µV/°C nA pA/°C nA Avd 50 25 65 65 100 V/mV SVR 100 dB ICC 0.7 1.2 2 VCC+ -1.5 VCC+ -2 mA Vicm V CMR dB Isource 40 60 mA Isink 10 12 26 26 27 27 20 50 mA µA VOH 27 28 5 20 20 V VOL mV 6/22 LM2904 Table 3. Symbol Electrical characteristics VCC+ = 5V, VCC- = Ground, VO = 1.4V, Tamb = 25°C (unless otherwise specified) Parameter Slew rate VCC+ = 15V, Vin = 0.5 to 3V, RL = 2kΩ CL = 100pF, , unity gain Tmin ≤ Tamb ≤ Tmax Gain bandwidth product f = 100kHz VCC+ = 30V, Vin = 10mV, RL = 2kΩ CL = 100pF , Total harmonic distortion , f = 1kHz, AV = 20dB, RL = 2kΩ Vo = 2Vpp, CL = 100pF, VCC+ = 30V Equivalent input noise voltage , f = 1kHz, RS = 100Ω VCC+ = 30V Channel separation (4) 1kHz ≤ f ≤ 20kHz Min. Typ. Max. Unit SR 0.3 0.2 0.7 0.6 V/µs GBP 1.1 MHz THD 0.02 % en VO1/VO2 1. 55 120 nV/√ Hz dB 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. 7/22 Electrical characteristics LM2904 Figure 2. 140 120 Open loop frequency response 10MΩ 0.1μF VI VCC/2 + VO Figure 3. 20 Large signal frequency response 100k Ω 1k Ω +15V VO +7V + 2k Ω OUTPUT SWING (Vpp) - VOLTAGE GAIN (dB) 100 80 60 40 20 0 1.0 10 100 VCC 15 VI VCC = 30V & -55°C Tamb +125°C 10 5 VCC = +10 to + 15V & -55°C Tamb +125°C 1k 10k 100k 1M 10M 0 1k 10k 100k 1M FREQUENCY (Hz) FREQUENCY (Hz) Figure 4. 4 Voltage follower pulse response RL 2 kΩ VCC = +15V Figure 5. 10 Output characteristics VCC = +5V VCC = +15V VCC = +30V 1 v cc v cc /2 IO + VO OUTPUT VOLTAGE (V) 3 2 1 0 3 OUTPUT VOLTAGE (V) 0.1 INPUT VOLTAGE (V) 2 1 0.01 0 10 20 30 40 Tamb = +25°C 0,01 0,1 1 10 100 0,001 TIME (μ s) OUTPUT SINK CURRENT (mA) Figure 6. 500 Voltage follower pulse response Figure 7. OUTPUT VOLTAGE REFERENCED Output characteristics 8 7 6 V CC /2 + IO VO V CC OUTPUT VOLTAGE (mV) 450 el + eO 50pF 400 Input 350 Output 300 250 0 1 2 3 4 TO VCC+ (V) 5 4 3 2 1 0,001 0,01 - Independent of V CC T amb = +25°C Tamb = +25°C VCC = 30 V 5 6 7 8 0,1 1 10 100 TIME (ms) OUTPUT SOURCE CURRENT (mA) 8/22 LM2904 Electrical characteristics Figure 8. 90 80 Input current versus temperature VI = 0 V VCC = +30 V VCC = +15 V Figure 9. 90 Current limiting 80 70 60 50 40 30 20 10 0 + - OUTPUT CURRENT (mA) INPUT CURRENT (mA) IO 70 60 50 40 30 20 10 0 -55 -35 -15 VCC = +5 V 5 25 45 65 85 105 125 -55 -35 -15 5 25 45 65 85 105 125 TEMPERATURE (°C) TEMPERATURE (°C) Figure 10. Input voltage range 15 Figure 11. Supply current 4 VCC SUPPLY CURRENT (mA) INPUT VOLTAGE (V) 3 mA - ID 10 Négative 2 + 5 Positive 1 Tamb = 0°C to +125°C Tamb = -55°C 0 5 10 15 0 10 20 30 POWER SUPPLY VOLTAGE (±V) POSITIVE SUPPLY VOLTAGE (V) Figure 12. Voltage gain 160 Figure 13. Input current versus supply voltage 100 INPUT CURRENT (nA) R L = 20kΩ VOLTAGE GAIN (dB) 120 R L = 2k Ω 75 50 25 80 40 Tamb= +25°C 0 10 20 30 40 POSITIVE SUPPLY VOLTAGE (V) 0 10 20 30 POSITIVE SUPPLY VOLTAGE (V) 9/22 Electrical characteristics LM2904 Figure 14. Gain bandwidth product GAIN BANDWIDTH PRODUCT (MHz) 1.5 1.35 1.2 1.05 0.9 0.75 0.6 0.45 0.3 0.15 0 -55-35-15 5 25 45 65 85 105 125 TEMPERATURE (°C) VCC = 15V Figure 15. Power supply rejection ratio POWER SUPPLY REJECTION RATIO (dB) 115 110 SVR 105 100 95 90 85 80 75 70 65 60-55-35-15 5 25 45 65 85 105 125 TEMPERATURE (°C) Figure 16. Common mode rejection ratio COMMON MODE REJECTION RATIO (dB) Figure 17. Phase margin vs capacitive load Phase Margin at Vcc=15V and Vicm=7.5V Vs. Iout and Capacitive load value 115 110 105 100 95 90 85 80 75 70 65 60-55-35-15 5 25 45 65 85 105 125 TEMPERATURE (°C) 10/22 LM2904 Electrical characteristics Typical single-supply applications Figure 18. AC coupled inverting amplifier Rf 100k Ω R1 10k Ω 1/2 LM2904 Figure 19. AC coupled non-inverting amplifier R1 100k Ω C1 0.1μF R2 1M Ω A V= 1 + R2 R1 (as shown A V = 11) Co 0 eo RL 10k Ω 2VPP CI R1 (as shown AV = -10) Co 0 eo RL 10k Ω 2VPP AV = - Rf CI 1/2 LM2904 eI ~ R2 VCC 100k Ω RB 6.2kΩ R3 100k Ω RB 6.2k Ω eI ~ R3 1MΩ R4 100k Ω C1 10 μF VCC C2 10μF R5 100kΩ Figure 20. Non-inverting DC gain A V = 1 + R2 R1 (As shown A V = 101) Figure 21. DC summing amplifier e1 100kΩ 10kΩ 1/2 LM2904 eO +5V e2 e3 100kΩ 100kΩ 100kΩ 1/2 LM2904 eO e O (V) R1 10k Ω R2 1M Ω 100kΩ e4 100kΩ eo = e1 + e2 - e3 - e4 where (e1 + e2) ≥ (e3 + e4) to keep eo ≥ 0V 0 e I (mV) Figure 22. High input Z, DC differential amplifier Figure 23. Using symmetrical amplifiers to reduce input current 1/2 R2 100k Ω R1 100k Ω 1/2 LM2904 R4 100k Ω R3 100k Ω 1/2 LM2904 I eI IB I I B LM2904 2N 929 0.001μ F eo +V1 +V2 If R1 = R5 and R3 = R4 = R6 = R7 eo = [ 1 + 2R1 ] (e2 - e1) R2 As shown eo = 101 (e2 - e1) Vo IB IB 3M Ω IB 1/2 LM2904 Input current compensation 1.5M Ω 11/22 Electrical characteristics LM2904 Figure 24. Low drift peak detector IB 1/2 I B LM2904 Figure 25. Active bandpass filter R1 100k Ω C1 330pF eo Zo +V1 1/2 LM2904 R2 100k Ω 1/2 LM2904 R5 470k Ω 1/2 LM2904 eI ZI μ 1F C 2IB 2N 929 R4 10M Ω C2 330pF 1/2 LM2904 0.001μ F IB 3R 3M Ω IB 1/2 LM2904 R3 100k Ω R6 470k Ω Vo R7 100k Ω VCC R8 100k Ω C3 10 μF 2IB R 1M Ω Input current compensation Fo = 1kHz Q = 50 Av = 100 (40dB) 12/22 LM2904 Macromodel 4 4.1 Macromodel 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 13/22 Macromodel 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 14/22 LM2904 Package information 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. 15/22 Package information LM2904 5.1 DIP8 package information Figure 26. DIP8 package mechanical drawing Table 4. DIP8 package mechanical data Dimensions Ref. Min. A A1 A2 b b2 c D E E1 e eA eB L 2.92 0.38 2.92 0.36 1.14 0.20 9.02 7.62 6.10 Millimeters Typ. Max. 5.33 0.015 3.30 0.46 1.52 0.25 9.27 7.87 6.35 2.54 7.62 10.92 3.30 3.81 0.115 4.95 0.56 1.78 0.36 10.16 8.26 7.11 0.115 0.014 0.045 0.008 0.355 0.300 0.240 Min. Inches Typ. Max. 0.210 0.130 0.018 0.060 0.010 0.365 0.310 0.250 0.100 0.300 0.195 0.022 0.070 0.014 0.400 0.325 0.280 0.430 0.130 0.150 16/22 LM2904 Package information 5.2 SO-8 package information Figure 27. SO-8 package mechanical drawing Table 5. SO-8 package mechanical data Dimensions Ref. Min. A A1 A2 b c D E E1 e h L k ccc 0.25 0.40 1° 0.10 1.25 0.28 0.17 4.80 5.80 3.80 Millimeters Typ. Max. 1.75 0.25 0.004 0.049 0.48 0.23 4.90 6.00 3.90 1.27 0.50 1.27 8° 0.10 0.010 0.016 1° 5.00 6.20 4.00 0.011 0.007 0.189 0.228 0.150 Min. Inches Typ. Max. 0.069 0.010 0.019 0.010 0.193 0.236 0.154 0.050 0.020 0.050 8° 0.004 0.197 0.244 0.157 17/22 Package information LM2904 5.3 TSSOP8 package information Figure 28. TSSOP8 package mechanical drawing Table 6. TSSOP8 package mechanical data Dimensions Ref. Min. A A1 A2 b c D E E1 e k L L1 aaa 0° 0.45 0.05 0.80 0.19 0.09 2.90 6.20 4.30 Millimeters Typ. Max. 1.2 0.15 1.00 1.05 0.30 0.20 3.00 6.40 4.40 0.65 8° 0.60 1 0.1 0.75 0° 0.018 3.10 6.60 4.50 0.002 0.031 0.007 0.004 0.114 0.244 0.169 Min. Inches Typ. Max. 0.047 0.006 0.039 0.041 0.012 0.008 0.118 0.252 0.173 0.0256 8° 0.024 0.039 0.004 0.030 0.122 0.260 0.177 18/22 LM2904 Package information 5.4 MiniSO-8 package information Figure 29. MiniSO-8 package mechanical drawing Table 7. MiniSO-8 package mechanical data Dimensions Ref. Min. A A1 A2 b c D E E1 e L L1 L2 k ccc 0° 0.40 0 0.75 0.22 0.08 2.80 4.65 2.80 Millimeters Typ. Max. 1.1 0.15 0.85 0.95 0.40 0.23 3.00 4.90 3.00 0.65 0.60 0.95 0.25 8° 0.10 0° 0.80 0.016 3.20 5.15 3.10 0 0.030 0.009 0.003 0.11 0.183 0.11 Min. Inches Typ. Max. 0.043 0.006 0.033 0.037 0.016 0.009 0.118 0.193 0.118 0.026 0.024 0.037 0.010 8° 0.004 0.031 0.126 0.203 0.122 19/22 Ordering information LM2904 6 Table 8. Ordering information Order codes Temperature range Package DIP8 SO-8 TSSOP8 (Thin shrink outline package) -40°C to +125°C MiniSO-8 SO-8 (Automotive grade level) TSSOP8 (Automotive grade level) MiniSO-8 (Automotive grade level) Packing Tube Tube or tape & reel 2904 Tape & reel Tape & reel Tube or tape & reel 2904Y Tape & reel Tape & reel K409 K403 Marking LM2904N Order code LM2904N LM2904D/DT LM2904PT LM2904ST LM2904YD LM2904YDT(1) LM2904YPT (2) (1) LM2904YST(2) 1. Qualified and characterized according to AEC Q100 and Q003 or equivalent, advanced screening according to AEC Q001 & Q 002 or equivalent. 2. Qualification and characterization according to AEC Q100 and Q003 or equivalent, advanced screening according to AEC Q001 & Q 002 or equivalent are on-going. 20/22 LM2904 Revision history 7 Revision history Table 9. Date 2-Jan-2002 20-Jun-2005 10-Oct-2005 12-Dec-2005 Document revision history Revision 1 2 3 4 Initial release. PPAP references inserted in the datasheet ,see Table 8 on page 20. ESD protection inserted in Table 1 on page 4. PPAP part numbers added in table Table 8 on page 20. Pin connections identification added on cover page figure. Thermal resistance junction to case information added see Table 1 on page 4. Maximum junction temperature parameter added in Table 1 on page 4. Minimum slew rate parameter in temperature Table 3 on page 6. Modified ESD values and added explanation on VCC, Vid in Table 1 on page 4. Added macromodel information. Modified ESD/HBM values in Table 1 on page 4. Updated miniSO-8 package information. Added note relative to automotive grade level part numbers in Table 8 on page 20. Power dissipation value corrected in Table 1: Absolute maximum ratings (AMR). Table 2: Operating conditions added. Equivalent input noise voltage parameter added in Table 3. Electrical characteristics curves updated. Figure 17: Phase margin vs capacitive load added. Section 5: Package information updated. Removed power dissipation parameter from Table 1: Absolute maximum ratings (AMR). Removed Vopp from electrical characteristics in Table 3. Corrected MiniSO-8 package mechanical data in Section 5.4: MiniSO-8 package information. Added table of contents. Corrected the scale of Figure 5 (mA not µA). Corrected SO-8 package information. Changes 1-Feb-2006 2-May-2006 13-Jul- 2006 5 6 7 28-Feb-2007 8 18-Jun-2007 9 18-Dec-2007 10 8-Apr-2008 11 21/22 LM2904 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. 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