ST LS204 User Manual
High performance dual operational amplifier
1
2
3
45
6
7
8
-
+
-
+
Output 1
Inverting input 1
Non-inverting input 1
V
CC
V
CC
Output 2
Inverting input 2
Non-inverting input 2
-
+
Features
■ Low power consumption
■ Short-circuit protection
■ Low distortion, low noise
■ High gain-bandwidth product
■ High channel separation
Description
The LS204 is a high perf ormance dual operational
amplifier with frequency and phase compensation
built into the chip. The internal phase
compensation allows stable operation as voltage
follower in spite of its high gain-bandwidth
product.
LS204
N
DIP8
(Plastic package)
D
SO-8
(Plastic micro package)
The circuit presents very stable electrical
characteristics over the entire supply voltage
range, and is particularly intended for pr ofessional
and telecom applications (such as active filtering).
Pin connections
(top view)
June 2008 Rev 2 1/16
www.st.com
16
Circuit schematics LS204
1 Circuit schematics
Figure 1. Schematic diagram (1/2 LS204)
2/16
LS204 Absolute maximum ratings and operating conditions
2 Absolute maximum ratings and operating conditions
Table 1. Absolute maximum ratings
Symbol Parameter Value Unit
(2)
(1)
(7)
(3)
(6)
(5)
(8)
(4)
CC
(4)
+
and V
CC
±18 V
±V
CC
V
±(VCC-1) V
125
°C/W
85
40
°C/W
41
Infinite
2kV
200 V
1.5 kV
-
.
V
CC
V
i
V
id
Supply voltage
Input voltage
Differential input voltage
Thermal resistance junction to ambient
R
thja
SO-8
DIP8
Thermal resistance junction to case
R
thjc
SO-8
DIP8
Output short-circuit duration
T
j
T
stg
Junction temperature 150 °C
Storage temperature range -65 to +150 °C
HBM: human body model
ESD
MM: machine model
CDM: charged device model
1. All voltage values, except differential voltage, are with respect to the zero reference level (ground) of the supply voltages
where the zero reference level is the midpoint between V
2. The magnitude of the input voltage must never exceed the magnitude of the supply voltage or 15 volts, whichever is less.
3. Differential voltages are the non-inverting input terminal with respect to the inverting input terminal.
4. Short-circuits can cause excessive heating and destructive dissipation. Values are typical.
5. The output may be shorted to ground or to either supply. Temperature and/or supply voltages must be limited to ensure
that the dissipation rating is not exceeded.
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.
Table 2. Operating conditions
Symbol Parameter LS204C LS204I Unit
Supply voltage 6 to 30 V
CC
Common mode input voltage range VDD+1.5 to VCC-1.5 V
icm
Operating free-air temperature range 0 to +70 -40 to +105 °C
3/16
T
V
V
oper
Electrical characteristics LS204
3 Electrical characteristics
Table 3. Electrical characteristics at VCC = ±15 V, T
= +25° C (unless otherwise specified)
amb
LS204I LS204C
Symbol Parameter
Min. Typ. Max. Min. Typ. Max.
Supply current 0.7 1.2 0.8 1.5 mA
I
CC
V
DV
DI
A
Input bias current
I
ib
R
T
< T
amb
< T
max
min
Input resistance (F = 1kHz) 1 1 MΩ
i
Input offset voltage (Rs ≤ 10kΩ)
io
io
I
io
io
I
os
vd
< T
T
min
Input offset voltage drift (Rs ≤ 10kΩ) T
amb
< T
max
min
< T
amb
< T
max
Input offset current
< T
T
min
Input offset current drift T
amb
< T
max
min
< T
amb
< T
max
Output short-circuit current 23 23 mA
Large signal voltage gain T
RL = 2kΩ, V
RL = 2kΩ, V
CC
CC
= ±15V
= ±4V
min
< T
amb
< T
max
50 150
300
0.5 2.5
3.5
100 300
700
0.5 3.5
5
55µV/°C
520
40
12 50
100
0.08 0.1 nA/°C
90 100
95
86 100
95
GBP Gain bandwidth product (F =100kHz) 1.8 3 1.5 2.5 MHz
Equivalent input noise voltage F = 1kHz, Rs = 100Ω
= 50Ω
R
e
n
s
Rs = 1kΩ
Rs = 10kΩ
10
18
8
10
12
20
Unit
nA
mV
nA
dB
nV
----------- Hz
THD
Total harmonic distortion (F = 1kHz, A
Vo= 2Vpp)
= 20dB, RL = 2kΩ,
v
0.03 0.03 %
Output voltage swing
±V
V
= 2kΩ, VCC = ±15V
opp
opp
R
L
= 2kΩ, V
R
L
CC
= ±4V
Large signal voltage swing RL = 10kΩ, F= 10kHz 28 28 V
±13
±3
±13
±3
SR Slew rate (RL = 2kΩ, unity gain) 0.8 1.5 1 V/µs
SVR Supply voltage rejection ratio T
CMR
Common mode rejection ratio V
T
< T
amb
< T
max
min
min
= ±10V
ic
amb
< T
max
90 86 dB
90 86 dB
< T
Vo1/Vo2Channel separation (F= 1 kHz) 100 120 120 dB
4/16
V
pp
LS204 Electrical characteristics
Figure 2. Supply current versus supply
voltage
Figure 4. Output short circuit current versus
ambient temperature
Figure 3. Supply current versus ambient
temperature
Figure 5. Open loop frequency and phase
response
Figure 6. Output loop gain versus ambient
temperature
Figure 7. Supply voltage rejection versus
frequency
5/16
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