LMX321, LMX358, LMX324
General-purpose, low voltage rail-to-rail output
operational amplifiers
Datasheet
-
production data
Single (LMX321)
Applications
•
Battery-powered applications
•
Portable devices
•
Signal conditioning
SC70-5
SOT23-5
•
Active filtering
•
Medical instrumentation
Dual (LMX358)
Description
The LMX3xx series is a set of single, dual, and
quad low-voltage, general-purpose, operational
amplifiers. These devices can operate from 2.3 V
to 5.5 V with a typical current consumption of
120
μA
per channel. The LMX3xx series offers a
rail-to-rail output and an input common-mode
voltage that includes ground.
The LMX3xx series also exhibits a 1.3 MHz gain
bandwidth and they can drive capacitive loads.
The devices are stable while operating at unity
gain. They are offered with industry standard
pinouts in tiny packages.
Table 1. Device summary
DFN8 2x2
MiniSO8
SO8
Quad (LMX324)
TSSOP14
SO14
Features
•
Low power consumption: 120 µA at 2.7 V
•
Low supply voltage: 2.3 V - 5.5 V
•
Rail-to-rail output swing
•
Gain bandwidth product: 1.3 MHz
•
Extended temperature range: -40 °C to 125 °C
•
No crossover distortion
•
No phase reversal
•
Tiny packages
Reference
LMX3xx
Single
LMX321
Dual
LMX358
Quad
LMX324
Related products
•
See the TSV85x series for higher accuracy,
stand-by options, and smaller packages
May 2013
This is information on a product in full production.
DocID022943 Rev 3
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www.st.com
25
Contents
LMX321, LMX358, LMX324
Contents
1
2
3
4
Package pin connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Absolute maximum ratings and operating conditions . . . . . . . . . . . . . 4
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.1
4.2
4.3
4.4
4.5
4.6
Operating voltages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Input common-mode range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Rail-to-rail output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Input offset voltage drift over temperature . . . . . . . . . . . . . . . . . . . . . . . . 13
PCB layouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Macromodel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5
Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.1
5.2
5.3
5.4
5.5
5.6
5.7
SC70-5 (or SOT323-5) package information . . . . . . . . . . . . . . . . . . . . . . 15
SOT23-5 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
DFN8 2x2 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
MiniSO8 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
SO8 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
TSSOP14 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
SO14 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
6
7
Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
2/25
DocID022943 Rev 3
LMX321, LMX358, LMX324
Package pin connections
1
Package pin connections
Figure 1. Pin connections for each package (top view)
In+
Vcc-
In-
1
2
3
5
Vcc+
4
Out
SC70-5/SOT23-5
Out1
In1-
In1+
Vcc-
1
2
3
4
8
7
6
5
Vcc+
Out2
In2-
In2+
DFN8 2x2
MiniSO8/SO8
Out1
In1-
In1+
Vcc+
In2+
In2-
Out2
1
2
3
4
5
6
7
14
13
12
11
10
Out4
In4-
In4+
Vcc-
In3+
In3-
Out3
9
8
TSSOP14/SO14
1. The exposed pad of the DFN8 2x2 can be connected to VCC- or left floating.
DocID022943 Rev 3
3/25
Absolute maximum ratings and operating conditions
LMX321, LMX358, LMX324
2
Absolute maximum ratings and operating conditions
Table 2. Absolute maximum ratings (AMR)
Symbol
V
CC
V
id
V
in
I
in
T
stg
Supply voltage
(1)
Differential input voltage
(2)
Input pins (IN+ and IN- pins) voltage
(3)
Input current
(4)
Storage temperature
Thermal resistance junction to ambient
(5)(6)
SC70-5
SOT23-5
R
thja
DFN8 2x2
MiniSO8
SO8
TSSOP14
SO14
T
j
ESD
Maximum junction temperature
HBM: human body model
(7)
MM: machine model
(8)
CDM: charged device model
(9)
Latch-up immunity
205
250
57
190
125
100
105
150
4000
250
1300
200
mA
V
°C
°C/W
Parameter
Value
6
±V
CC
V
cc-
- 0.3 to V
cc+
+ 0.3
10
-65 to +150
mA
°C
V
Unit
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.
V
CC
-V
in
must not exceed 6 V, V
in
must not exceed 6 V.
4. Input current must be limited by a resistor in series with the inputs.
5. Short-circuits can cause excessive heating and destructive dissipation.
6. R
th
are typical values.
7. Human body model: 100 pF discharged through a 1.5 kΩ resistor between two pins of the device, done for
all couples of pin combinations with other pins floating.
8. 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
Ω),
done for all couples of pin
combinations with other pins floating.
9. Charged device model: all pins plus package are charged together to the specified voltage and then
discharged directly to the ground.
Table 3. Operating conditions
Symbol
V
CC
V
icm
T
oper
Supply voltage
Common mode input voltage range
Operating free air temperature range
Parameter
Value
2.3 to 5.5
V
CC-
- 0.2 to V
CC+
- 1
-40 to +125
Unit
V
°C
4/25
DocID022943 Rev 3
LMX321, LMX358, LMX324
Electrical characteristics
3
Electrical characteristics
Table 4. Electrical characteristics at V
CC+
= 2.7 V with V
CC-
= 0 V, V
icm
= V
CC
/2, T
amb
= 25° C, and
R
L
connected to V
CC
/2 (unless otherwise specified)
Symbol
DC performance
V
io
ΔV
io
/ΔT
I
io
I
ib
Input offset voltage
Input offset voltage drift
(1)
Input offset current
4
-40 °C < T< 125 °C
-40 °C < T< 125 °C
V
out
= V
cc
/2
-40 °C < T< 125 °C
V
out
= V
cc
/2
-40 °C < T< 125 °C
V
ic
= 0 V to V
cc
-1 V,
V
out
= V
cc
/2
-40 °C < T< 125 °C
R
L
= 10 kΩ,
V
out
= 0.5 V to (V
cc
-0.5 V)
A
vd
Large signal voltage gain
-40 °C < T< 125 °C
R
L
= 2 kΩ,
V
out
= 0.5 V to (V
cc
-0.5 V)
-40 °C < T< 125 °C
R
L
= 10 kΩ,
V
CC
-V
OH
High level output voltage
-40 °C < T< 125 °C
R
L
= 2 kΩ
-40 °C < T< 125 °C
R
L
= 10 kΩ,
V
OL
Low level output voltage
-40 °C < T< 125 °C
R
L
= 2 kΩ,
-40 °C < T< 125 °C
I
sink
I
out
I
source
I
CC
Supply current (per channel)
V
out
= V
cc
, V
id
= -1 V
-40 °C < T< 125 °C
V
out
= 0 V, Vid = 1 V
-40 °C < T< 125 °C
No load, V
out
= V
CC
/2
-40 °C < T< 125 °C
15
15
15
12
120
180
180
µA
21
26
mA
120
65
40
70
68
100
90
90
80
10
100
200
300
400
180
280
300
400
mV
100
110
dB
75
27
1
0.5
30
50
60
110
nA
6
mV
μV/°C
Parameter
Conditions
Min.
Typ.
Max.
Unit
Input bias current
CMR
Common mode rejection ratio
20 log (ΔV
icm
/ΔV
io
)
DocID022943 Rev 3
5/25
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