Rev 3
October 2005
1/15
15
LM2904
Low Power Dual Operational Amplifier
Internally frequency compensated
Large DC voltage gain: 100dB
Wide bandwidth (unity gain): 1.1MHz
(temperature compensated)
Very low supply current/op (500A) essentially
independent of supply voltage
Low input bias current: 20nA (temperature
compensated)
Low input offset current: 2nA
Input common-mode voltage range includes
ground
Differential input voltage range equal to the
power supply voltage
Large output voltage swing 0V to (V
CC
- 1.5V)
Description
This circuit consists of two independent, high
gain, internally frequency compensated 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
with off the standard +5V 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 only a single power supply voltage.
Pin Connection (top view)
N
DIP8
(Plastic Package)
D
SO-8
(Plastic Micropackage)
P
TSSOP8
(Thin Shrink Small Outline Package)
S
Mini SO-8
(Mini SO Package)
1
2
3
4
5
6
7
8
-
+
-
+
www.st.com
LM2904
Absolute Maximum Ratings
3/15
1
Absolute Maximum Ratings
Table 1.
Key parameters and their absolute maximum ratings
Symbol
Parameter
Value
Unit
V
CC
Supply Voltage
+32
V
V
id
Differential Input Voltage
+32
V
V
I
Input Voltage
-0.3 to +32
V
Output Short-circuit to Ground
(1)
1. Short-circuits from the output to V
CC
can cause excessive heating if Vcc
+
> 15V. The maximum
output current is approximately 40mA, independent of the magnitude of V
CC
.
Destructive dissipation can result from simultaneous short-circuits on all amplifiers.
p
tot
Power Dissipation
(2)
2. Power dissipation must be considered to ensure maximum junction temperature (Tj) is not
exceeded.
500
mW
I
in
Input Current
(3)
3. 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 V
CC
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 -
0.3V.
50
mA
T
oper
Operating Free-Air Temperature Range
-40 to +125
C
T
stg
Storage Temperature Range
-65 to +150
C
R
thja
Thermal Resistance Junction to Ambient
SO-8
TSSOP8
DIP8
MiniSO-8
125
120
85
190
C/W
ESD
HBM: Human Body Model
(4)
4. Human body model, 100pF discharged through a 1.5k
resistor into pin of device.
300
V
MM: Machine Model
(5)
5. Machine model ESD, a 200pF cap is charged to the specified voltage, then discharged directly into
the IC with no external series resistor (internal resistor < 5
), into pin to pin of device.
200
V
CDM: Charged Device Model
1.5
kV
LM2904
Electrical Characteristics
5/15
3 Electrical
Characteristics
Table 2.
V
CC
+
= 5V, V
cc
-
= Ground, V
O
= 1.4V, T
amb
= 25C (unless otherwise specified)
Symbol
Parameter
Min.
Typ.
Max.
Unit
V
io
Input Offset Voltage
(1)
T
amb
= 25C
T
min
T
amb
T
max.
2
7
9
mV
I
io
Input Offset Current
T
amb
= 25C
T
min
T
amb
T
max.
2
30
40
nA
I
ib
Input Bias Current
(2)
T
amb
= 25C
T
min
T
amb
T
max.
20
150
200
nA
A
vd
Large Signal Voltage Gain
V
CC
+
= +15V,R
L
=2k
, V
o
= 1.4V to 11.4V
T
amb
= 25C
T
min
T
amb
T
max.
50
25
100
V/
mV
SVR
Supply Voltage Rejection Ratio (R
S
10k
)
T
amb
= 25C
T
min
T
amb
T
max.
65
65
100
dB
I
cc
Supply Current, all Amp, no load
T
amb
= 25C, V
CC
= +5V
T
min
T
amb
T
max.
, V
CC
= +30V
0.7
1.2
2
mA
V
icm
Input Common Mode Voltage Range (V
cc
= +30V)
(3)
T
amb
= 25C
T
min
T
amb
T
max.
0
0
V
CC
+
-1.5
V
CC
+
-2
V
CMR
Common-mode Rejection Ratio (R
S
=
10k
)
T
amb
= 25C
T
min
T
amb
T
max.
70
60
85
dB
I
source
Output Short-circuit Current
V
CC
= +15V, V
o
= +2V, V
id
= +1V
20
40
60
mA
I
sink
Output Sink Current
V
O
= 2V, V
CC
= +5V
V
O
= +0.2V, V
CC
= +15V
10
12
20
50
mA
A
V
OPP
Output Voltage Swing (R
L
=
2k
T
amb
= 25C
T
min
T
amb
T
max
0
0
V
CC
+
-1.5
V
CC
+
-2
V
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