LM2904, LM2904A
Low-power dual operational amplifier
Datasheet - production data
Related products
See LM2904W for enhanced ESD
performances
Description
This circuit consists of two independent, high
gain operational amplifiers (op amps) that have
frequency compensation implemented internally.
They are designed specifically for automotive and
industrial control systems. The circuit 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.
Features
Frequency compensation implemented
internally
Large DC voltage gain: 100 dB
Wide bandwidth (unity gain): 1.1 MHz
(temperature compensated)
Very low supply current/amplifier, 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
+
((V
CC
) -1.5 V)
Application areas include transducer amplifiers,
DC gain blocks and all the conventional op amp
circuits which can now 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 easily provides the required
electronic interfaces 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.
February 2016
DocID2471 Rev 17
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www.st.com
This is information on a product in full production.
Contents
LM2904, LM2904A
Contents
1
2
3
4
5
6
7
8
Schematic diagram.......................................................................... 3
Package pin connections................................................................ 4
Absolute maximum ratings and operating conditions ................. 5
Electrical characteristics ................................................................ 7
Electrical characteristic curves ...................................................... 9
Typical single-supply applications .............................................. 12
Macromodel ................................................................................... 14
Package information ..................................................................... 15
8.1
8.2
8.3
8.4
DFN8 2x2 package information ....................................................... 16
MiniSO8 package information ......................................................... 18
TSSOP8 package information ......................................................... 19
SO8 package information ................................................................ 20
9
10
Ordering information..................................................................... 21
Revision history ............................................................................ 22
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Schematic diagram
1
Schematic diagram
Figure 1: Schematic diagram (1/2 LM2904, LM2904A)
V
CC
6
µ
A
4
µ
A
C
C
100µ
A
Q5
Q6
Inverting
input
Non-invertin
g
input
Q2
Q1
Q3
Q4
Q11
Output
Q7
R
SC
Q13
Q10
Q8
Q9
50
µ
A
GND
Q12
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Package
pin connections
LM2904, LM2904A
2
Package pin connections
Figure 2: DFN8 2x2 package pin connections (top view)
1.
The exposed pad of the DFN8 2x2 can be connected to (VCC-) or left floating.
Figure 3: MiniSO8, TSSOP8, and SO8 package pin connections (top view)
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LM2904, LM2904A
Absolute maximum
ratings and operating
conditions
3
Symbol
V
CC
V
id
V
in
Absolute maximum ratings and operating conditions
Table 1: Absolute maximum ratings
Parameter
Supply voltage
(1)
(2)
Value
±16 or 32
±32
-0.3 to 32
Unit
Differential input voltage
Input voltage
V
Output short-circuit duration
I
in
T
oper
T
stg
T
j
Input current
Input current
(4)
(3)
Infinite
5 mA in DC or 50 mA in AC,
(duty cycle = 10 %, T = 1 s)
0.4
-40 to 125
-65 to 150
150
DFN8 2x2
57
190
120
125
39
37
40
300
200
s
mA
: V
in
driven negative
: V
in
driven positive above AMR value
(5)
Operating free-air temperature range
Storage temperature range
Maximum junction temperature
°C
R
thja
Thermal resistance junction to ambient
(6)
MiniSO8
TSSOP8
SO8
MiniSO8
°C/W
R
thjc
Thermal resistance junction to case
(7)
(6)
TSSOP8
SO8
HBM: human body model
ESD
MM: machine model
(8)
V
kV
CDM: charged device model
Notes:
(1)
(2)
(3)
(9)
1.5
All voltage values, except differential voltage are with respect to network ground terminal.
Differential voltages are the non-inverting input terminal with respect to the inverting input terminal.
+
Short-circuits from the output to V
CC
can cause excessive heating if (V
cc
) > 15 V. The maximum output current is approximately
40 mA, independent of the magnitude of V
CC
. 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 an input diode clamp. In addition to this diode action,
there is NPN parasitic action on the IC chip. This transistor action can cause the output voltages of the op amps to go to the V
CC
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)
The junction base/substrate of the input PNP transistor polarized in reverse must be protected by a resistor in series with the
inputs to limit the input current to 400 µA max (R = (V
in
- 32 V)/400 µA).
(6)
(7)
Short-circuits can cause excessive heating and destructive dissipation. Values are typical.
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.
(8)
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.
(9)
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.
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嵌入式系统
