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LM2904W
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 A) 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 0V to (VCC+ - 1.5 V) ESD internal protection: 2 kV P TSSOP8 (Thin shrink small outline package) D SO-8 (Plastic micropackage) N DIP8 (Plastic package)
Description
This circuit consists of two independent, high gain, internally frequency compensated operational amplifiers, 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 standard +5 V which is used in logic systems and will easily provide the required interface electronics without requiring any additional power supply. In 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.
Pin connections (top view)
February 2008
Rev 8
1/19
www.st.com 19
Schematic diagram
LM2904W
1
Schematic diagram
Figure 1. Schematic diagram (1/2 LM2904W)
2/19
LM2904W
Absolute maximum ratings and operating conditions
2
Table 1.
Symbol VCC Vid Vin
Absolute maximum ratings and operating conditions
Absolute maximum ratings (AMR)
Parameter Supply voltage (1) Differential input voltage Input voltage Output short-circuit duration(3) Iin Tstg Tj Input current
(4) (2)
Value +32 -0.3V to VCC + 0.3 -0.3V to VCC + 0.3 Infinite 50 -65 to +150 150 125 120 85 40 37 41 -65 to +150 2000 200 1500
Unit V V V s mA C C
Storage temperature range Maximum junction temperature Thermal resistance junction to ambient(5) SO-8 TSSOP8 DIP8 Thermal resistance junction to case(5) SO-8 TSSOP8 DIP8 Storage temperature range HBM: human body MM: machine model(7) CDM: charged device model(8) model(6)
Rthja
C/W
Rthjc
C/W
Tstg ESD
C V
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 shortcircuits 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 diode 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 during which an input is driven negative. This is not destructive and normal output is restored for input voltages above -0.3 V. 5. Short-circuits can cause excessive heating and destructive dissipation. Rth are typical values. 6. Human body model: 100 pF discharged through a 1.5 k resistor between two pins of the device, done for all couples of pin combinations with other pins floating. 7. Machine model: a 200 pF cap is charged to the specified voltage, then discharged directly between two pins of the device with no external series resistor (internal resistor < 5 ), done for all couples of pin combinations with other pins floating. 8. Charged device model: all pins plus package are charged together to the specified voltage and then discharged directly to the ground.
Table 2.
Symbol VCC Vicm Toper
Operating conditions
Parameter Supply voltage Common mode input voltage range Tmin Tamb Tmax Operating free-air temperature range Value 3 to 30 VCC+ - 1.5 VCC+ - 2 -40 to +125 Unit V V C
3/19
Electrical characteristics
LM2904W
3
Table 3.
Symbol Vio DVio Iio DIio Iib
Electrical characteristics
VCC+ = 5V, VCC- = Ground, VO = 1.4V, Tamb = 25C (unless otherwise specified)
Parameter Input offset voltage (1) Tmin Tamb Tmax Input offset voltage drift Input offset current Tmin Tamb Tmax Input offset current drift Input bias current Tmin Tamb Tmax Large signal voltage gain , VCC+= +15V, RL=2k Vo=1.4V to 11.4V Tmin Tamb Tmax Supply voltage rejection ratio RS 10k Tmin Tamb Tmax Supply current, all Amp, no load VCC = +5V Tmin Tamb Tmax, VCC = +30V Common-mode rejection ratio RS = 10k 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 RL = 2k Tmin Tamb Tmax RL = 10k Tmin Tamb Tmax Low level output voltage RL = 10k Tmin Tamb Tmax Slew rate VCC+ = 15V, Vin = 0.5 to 3V, RL = 2k CL = 100pF, unity gain , Tmin Tamb Tmax 0.3 0.2 70 60 20 50 25
(2)
Min.
Typ. 2 7 2 10 20
Max. 7 9 30 30 40 300 150 200
Unit mV V/C nA pA/C nA
Avd
100
V/mV
SVR
65 65
100
dB
ICC
0.7
1.2 2
mA
CMR
85
dB
Isource
40
60
mA
Isink
10 12
20 50
mA A
VOH
26 26 27 27
27 28 5 20 20
V
VOL
mV
SR
0.6
V/s
4/19
LM2904W Table 3.
Symbol GBP
Electrical characteristics VCC+ = 5V, VCC- = Ground, VO = 1.4V, Tamb = 25C (unless otherwise specified)
Parameter Gain bandwidth product , f = 100kHz, VCC+ = 30V, Vin = 10mV, RL = 2k CL = 100pF Total harmonic distortion , f = 1kHz, AV = 20dB, RL = 2k Vo = 2Vpp, CL = 100pF, VCC+ = 30V Equivalent input noise voltage , f = 1kHz, RS = 100 VCC+ = 30V Channel separation (3) 1kHz f 20kHz Min. 0.7 Typ. 1.1 Max. Unit MHz
THD
0.02
%
en VO1/VO2
1.
55 120
nV/Hz dB
VO = 1.4 V, RS = 0 , 5 V < VCC+ < 30 V, 0 V < Vic < VCC+ - 1.5 V
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. Due to the proximity of external components, ensure that stray capacitance does not cause coupling between these external parts. Typically, this can be detected because this type of capacitance increases at higher frequencies.
5/19
Electrical characteristics
LM2904W
Figure 2.
140
Open loop frequency response
10M 0.1F
Figure 3.
20
Large signal frequency response
100k 1k +15V VO +7V + 2k
120
VOLTAGE GAIN (dB)
100 80 60 40 20 0
1.0 10 100
VI VCC/2 +
VO
OUTPUT SWING (Vpp)
-
VCC
15
VI
VCC = 30V & -55C Tamb
+125C
10
5
VCC = +10 to + 15V & -55C Tamb +125C 1k 10k 100k 1M 10M
0
1k 10k 100k 1M
FREQUENCY (Hz)
FREQUENCY (Hz)
Figure 4.
4
Voltage follower pulse response
RL 2 k VCC = +15V
Figure 5.
Output characteristics
10 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 0,001 0,01 0,1
Tamb = +25C 1 10 100
TIME (s)
OUTPUT SINK CURRENT ( A)
Figure 6.
500
OUTPUT VOLTAGE REFERENCED
Voltage follower pulse response ( )
+ eO el 50pF
Figure 7.
Output characteristics
8 7 6
V CC /2 + IO VO V CC
OUTPUT VOLTAGE (mV)
450 400
TO VCC+ (V)
5 4 3 2 1
0,001 0,01
Input 350 Output 300 250
0 1 2 3 4
-
Independent of V CC T amb = +25C
Tamb = +25C VCC = 30 V
5 6 7 8
0,1
1
10
100
TIME (ms)
OUTPUT SOURCE CURRENT (mA)
6/19
LM2904W
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
Negative
2
+
5
Positive
1
Tamb = 0C to +125C
Tamb = -55C
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 = 20k
VOLTAGE GAIN (dB)
120 R L = 2k
75 50 25
80
40
Tamb= +25C
0
10
20
30
40
POSITIVE SUPPLY VOLTAGE (V)
0 10 20 30 POSITIVE SUPPLY VOLTAGE (V)
7/19
Electrical characteristics
LM2904W
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)
8/19
LM2904W
Electrical characteristics
Typical single-supply applications
Figure 18. AC coupled inverting amplifier
Rf 100k R1 10k
1/2 LM2904
Figure 19. AC coupled non-inverting amplifier
R1 100k C1 0.1F R2 1M A V= 1 + R2 R1 (as shown A V = 11) Co 0 eo RL 10k 2VPP
CI
R1 (as shown AV = -10) Co 0 eo RL 10k 2VPP
AV = -
Rf
CI
1/2 LM2904
eI ~ R2 VCC 100k
RB 6.2k R3 100k
RB 6.2k eI ~ R3 1M
R4 100k
C1 10F
VCC
C2 10F R5 100k
Figure 20. Non-inverting DC gain
A V = 1 + R2 R1 (As shown A V = 101)
Figure 21. DC summing amplifier
e1 100k
10k 1/2 LM2904
eO
+5V
e2 e3 100k 100k
100k
1/2 LM2904
eO
R1 10k
R2 1M
(V)
e
O
100k e4 100k
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 R1 100k
1/2 LM2904
R4 100k R3 100k
1/2 LM2904
I eI IB
I
I B LM2904 2N 929 0.001 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 IB
1/2 LM2904
Input current compensation
1.5M
9/19
Electrical characteristics
LM2904W
Figure 24. Low drift peak detector
IB
1/2 I B LM2904
Figure 25. Active bandpass filter
R1 100k C1 330pF
eo Zo
+V1
1/2 LM2904
R2 100k
1/2 LM2904
R5 470k
1/2 LM2904
eI ZI
1F
C
2IB 2N 929
R4 10M C2 330pF
1/2 LM2904
0.001 F IB 3R 3M IB
1/2 LM2904
R3 100k
R6 470k Vo R7 100k VCC R8 100k C3 10F
2IB R 1M
Input current compensation
Fo = 1kHz Q = 50 Av = 100 (40dB)
10/19
LM2904W
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. ** ESD diodes added to the initial macromodel (2007). ** CONNECTIONS : * 1 INVERTING INPUT * 2 NON-INVERTING INPUT * 3 OUTPUT * 4 POSITIVE POWER SUPPLY * 5 NEGATIVE POWER SUPPLY .SUBCKT LM2904W 1 2 3 4 5 *************************** .MODEL MDTH D IS=1E-8 KF=3.104131E-15 CJO=10F D1A 1 4 MDTH 400E-12 D1B 5 1 MDTH 400E-12 D2A 2 4 MDTH 400E-12 D2B 5 2 MDTH 400E-12 * 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
11/19
Macromodel 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 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
LM2904W
12/19
LM2904W
Package information
5
Package information
In order to meet environmental requirements, ST offers these devices in ECOPACK(R) 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 ST trademark. ECOPACK specifications are available at: www.st.com.
13/19
Package information
LM2904W
5.1
SO-8 package information
Figure 26. SO-8 package mechanical drawing
Table 4.
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
14/19
LM2904W
Package information
5.2
DIP8 package information
Figure 27. DIP8 package mechanical drawing
Table 5.
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
15/19
Package information
LM2904W
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
16/19
LM2904W
Ordering information
6
Table 7.
Ordering information
Order codes
Temperature range Package DIP8 SO-8 -40C, +125C TSSOP8 SO-8 (Automotive grade level) TSSOP8 (Automotive grade level) Packing Tube Tube or tape & reel Tape & reel Tube or tape & reel Tape & reel Marking LM2904W 2904W 2904W 2904WY K04WY
Order code LM2904WN LM2904WD LM2904WDT LM2904WPT LM2904WYD(1) LM2904WYDT(1) LM2904WYPT(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.
17/19
Revision history
LM2904W
7
Table 8.
Date
Revision history
Document revision history
Revision 1 Initial release. PPAP references inserted in the datasheet see Section 6: Ordering information on page 17. ESD protection inserted in Table 1: Absolute maximum ratings (AMR) on page 3. Correction of error in AVD min. value see Table 3 on page 4. LM2904WYPT PPAP reference added in Section 6: Ordering information on page 17. Information added in Table 1: Absolute maximum ratings (AMR) on page 3. Minimum value of slew rate at 25C and in temperature added in Table 3 on page 4. Power dissipation value corrected in Table 1: Absolute maximum ratings (AMR). ESD tolerance for HBM model improved to 2kV in Table 3 on page 4. Equivalent input noise voltage parameter added in Table 3. Electrical characteristics curves updated. Added Figure 17: Phase margin vs capacitive load on page 8. Section 5: Package information updated. Section 4: Macromodel added. Reformatted electrical characteristics table, Table 3. Deleted Vopp parameter in Table 3. Corrected footnotes for automotive grade order codes in Table 7. Corrected SO-8 package mechanical data. Dimension E in drawing was marked H in table. Corrected revision history. Changes
1-Sep-2003
1-Jul-2005
2
1-Oct-2005 1-Dec-2005
3 4
2-May-2006
5
20-Jul-2007
6
18-Dec-2007
7
21-Feb-2008
8
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LM2904W
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