LMX321, LMX358, LMX324
General-purpose, low voltage rail-to-rail output operational amplifiers
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
Related products
■See TSV85x series for higher accuracy, standby options and smaller packages
Applications
■Battery-powered applications
■Portable devices
■Signal conditioning
■Active filtering
■Medical instrumentation
Datasheet − production data
SC70-5 |
SOT23-5 |
MiniSO-8 |
SO-8 |
TSSOP14 |
SO-14 |
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 can drive capacitive loads. The devices are stable while operating at unity gain. They are offered with industry standard pinouts in tiny packages.
Reference |
Single |
Dual |
Quad |
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LMX3xx |
LMX321 |
LMX358 |
LMX324 |
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April 2012 |
Doc ID 022943 Rev 2 |
1/21 |
This is information on a product in full production. |
www.st.com |
Package pin connections |
LMX321, LMX358, LMX324 |
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In+ |
1 |
5 |
Out1 |
1 |
8 |
Vcc+ |
Vcc+ |
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Vcc- |
2 |
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In1- |
2 |
7 |
Out2 |
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In- |
3 |
4 |
In1+ |
3 |
6 |
In2- |
Out |
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Vcc- |
4 |
5 |
In2+ |
SC70-5 / SOT23-5
SO-8 / MiniSO-8
Out1 |
1 |
14 |
Out4 |
In1- |
2 |
13 |
In4- |
In1+ |
3 |
12 |
In4+ |
Vcc+ |
4 |
11 |
Vcc- |
In2+ |
5 |
10 |
In3+ |
In2- |
6 |
9 |
In3- |
Out2 |
7 |
8 |
Out3 |
TSSOP-14 / SO-14
2/21 |
Doc ID 022943 Rev 2 |
LMX321, LMX358, LMX324 |
Absolute maximum ratings and operating conditions |
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Table 2. |
Absolute maximum ratings (AMR) |
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Symbol |
Parameter |
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Value |
Unit |
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VCC |
Supply voltage(1) |
|
6 |
V |
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Vid |
Differential input voltage (2) |
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±VCC |
V |
|
V |
in |
Input pins (IN+ and INpins) voltage (3) |
V |
- 0.3 to V + 0.3 |
V |
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cc- |
cc+ |
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Iin |
Input current (4) |
|
10 |
mA |
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Tstg |
Storage temperature |
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-65 to +150 |
°C |
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Thermal resistance junction to ambient(5)(6) |
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SC70-5 |
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205 |
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SOT23-5 |
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250 |
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Rthja |
MiniSO8 |
|
190 |
°C/W |
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SO8 |
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125 |
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TSSOP14 |
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100 |
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SO14 |
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105 |
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Tj |
Maximum junction temperature |
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150 |
°C |
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HBM: human body model (7) |
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4000 |
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ESD |
MM: machine model(8) |
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250 |
V |
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CDM: charged device model(9) |
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1300 |
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Latch-up immunity |
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200 |
mA |
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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.VCC-Vin must not exceed 6 V, Vin 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.Rth 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 |
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Symbol |
Parameter |
Value |
Unit |
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VCC |
Supply voltage |
2.3 to 5.5 |
V |
Vicm |
Common mode input voltage range |
VCC- - 0.2 to VCC+ - 1 |
V |
Toper |
Operating free air temperature range |
-40 to +125 |
°C |
Doc ID 022943 Rev 2 |
3/21 |
Electrical characteristics |
LMX321, LMX358, LMX324 |
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Table 4. Electrical characteristics at VCC+ = 2.7 V with VCC- = 0 V, Vicm = VCC/2, Tamb = 25° C, and RL connected to VCC/2 (unless otherwise specified)
Symbol |
Parameter |
Conditions |
Min. |
Typ. |
Max. |
Unit |
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DC performance |
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Vio |
Input offset voltage |
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4 |
mV |
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-40°C < T< 125°C |
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6 |
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V / T |
Input offset voltage drift(1) |
-40°C < T< 125°C |
|
1 |
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μV/°C |
io |
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Iio |
Input offset current |
Vout = Vcc/2 |
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0.5 |
30 |
nA |
-40°C < T< 125°C |
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50 |
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Iib |
Input bias current |
Vout = Vcc/2 |
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27 |
60 |
nA |
-40°C < T< 125°C |
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110 |
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Common mode rejection ratio |
Vic = 0 V to Vcc-1 V, |
70 |
75 |
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CMR |
Vout = Vcc/2 |
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dB |
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20 log ( Vicm/ Vio) |
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-40°C < T< 125°C |
68 |
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RL = 10 kΩ, |
100 |
110 |
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Vout = 0.5 V to (Vcc-0.5 V) |
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Avd |
Large signal voltage gain |
-40°C < T< 125°C |
90 |
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dB |
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RL = 2 kΩ, |
90 |
100 |
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Vout = 0.5 V to (Vcc-0.5 V) |
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-40°C < T< 125°C |
80 |
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RL = 10 kΩ, |
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10 |
100 |
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VCC-VOH |
High level output voltage |
-40°C < T< 125°C |
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200 |
mV |
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RL = 2 kΩ |
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40 |
300 |
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-40°C < T< 125°C |
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400 |
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RL = 10 kΩ, |
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65 |
180 |
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VOL |
Low level output voltage |
-40°C < T< 125°C |
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280 |
mV |
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RL = 2 kΩ, |
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120 |
300 |
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-40°C < T< 125°C |
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400 |
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Isink |
Vout = Vcc, Vid = -1 V |
15 |
26 |
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mA |
Iout |
-40°C < T< 125°C |
15 |
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Isource |
Vout = 0 V, Vid = 1 V |
15 |
21 |
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mA |
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-40°C < T< 125°C |
12 |
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ICC |
Supply current (per channel) |
No load, Vout = VCC/2 |
|
120 |
180 |
µA |
-40°C < T< 125°C |
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180 |
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4/21 |
Doc ID 022943 Rev 2 |
LMX321, LMX358, LMX324 |
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Electrical characteristics |
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Table 4. |
Electrical characteristics at VCC+ = 2.7 V with VCC- = 0 V, Vicm = VCC/2, Tamb = 25° C, |
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and RL connected to VCC/2 (unless otherwise specified) (continued) |
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Symbol |
Parameter |
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Conditions |
Min. |
Typ. |
Max. |
Unit |
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AC performance |
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GBP |
Gain bandwidth product |
RL > 1 MΩ, CL = 200 pF |
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1.3 |
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MHz |
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Fu |
Unity gain frequency |
RL > 1 MΩ, CL = 200 pF |
|
1 |
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MHz |
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Φm |
Phase margin |
RL > 1 MΩ, CL = 200 pF |
|
60 |
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degrees |
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Gm |
Gain margin |
RL > 1 MΩ, CL = 200 pF |
|
10 |
|
dB |
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SR |
Slew rate |
RL > 1 MΩ, CL = 200 pF |
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0.6 |
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V/μs |
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Vout = 0.5 V to VCC - 0.5 V |
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f = 1 kHz |
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31 |
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nV |
|
en |
Equivalent input noise voltage |
f = 10 kHz |
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20 |
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----------- |
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Hz |
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in |
Equivalent input noise current |
f = 1 kHz |
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0.30 |
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pA |
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----------- |
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Hz |
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fin = 1 kHz, ACL = 1, |
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THD+N |
Total harmonic distortion + noise |
RL = 10 kΩ, |
|
0.002 |
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% |
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V |
= V /2, BW = 22 kHz, |
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ICM |
CC |
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Vout = 1 Vpp |
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Table 5. Electrical characteristics at VCC+ = 5 V with VCC- = 0 V, Vicm = VCC/2, Tamb = 25° C, and RL connected to VCC/2 (unless otherwise specified)
Symbol |
Parameter |
Conditions |
Min. |
Typ. |
Max. |
Unit |
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DC performance |
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Vio |
Input offset voltage |
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4 |
mV |
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-40°C < T< 125°C |
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6 |
|||
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V / T |
Input offset voltage drift(1) |
-40°C < T< 125°C |
|
1 |
|
μV/°C |
io |
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Iio |
Input offset current |
Vout = Vcc/2 |
|
0.5 |
30 |
nA |
-40°C < T< 125°C |
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|
50 |
|||
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Iib |
Input bias current |
Vout = Vcc/2 |
|
27 |
60 |
nA |
-40°C < T< 125°C |
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110 |
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Common mode rejection ratio |
Vic = 0 V to Vcc-1V, |
72 |
75 |
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CMR |
Vout = Vcc/2 |
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dB |
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20 log ( Vicm/ Vio) |
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-40°C < T< 125°C |
70 |
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SVR |
Supply voltage rejection ratio |
Vcc = 2.5 to 5 V |
72 |
79 |
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dB |
20 log ( Vcc/ Vio) |
-40°C < T< 125°C |
70 |
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RL = 10 kΩ, |
100 |
110 |
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Vout = 0.5 V to (VCC - 0.5 V) |
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Avd |
Large signal voltage gain |
-40°C < T< 125°C |
90 |
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dB |
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RL = 2 kΩ, |
90 |
100 |
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-40°C < T< 125°C |
80 |
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Doc ID 022943 Rev 2 |
5/21 |
Electrical characteristics |
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LMX321, LMX358, LMX324 |
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Table 5. |
Electrical characteristics at VCC+ = 5 V with VCC- = 0 V, Vicm = VCC/2, Tamb = 25° C, and |
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RL connected to VCC/2 (unless otherwise specified) (continued) |
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Symbol |
Parameter |
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Conditions |
Min. |
Typ. |
Max. |
Unit |
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RL = 10 kΩ |
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10 |
100 |
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VCC-VOH |
High level output voltage |
-40°C < T< 125°C |
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200 |
mV |
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RL = 2 kΩ, |
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40 |
300 |
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-40°C < T< 125°C |
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400 |
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RL = 10 kΩ |
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65 |
180 |
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VOL |
Low level output voltage |
-40°C < T< 125°C |
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280 |
mV |
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RL = 2 kΩ |
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120 |
300 |
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-40°C < T< 125°C |
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400 |
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Isink |
Vout = VCC, Vid = -1 V |
35 |
43 |
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mA |
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Iout |
-40°C < T< 125°C |
25 |
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Isource |
Vout = 0 V, Vid = 1 V |
60 |
70 |
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mA |
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-40°C < T< 125°C |
50 |
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ICC |
Supply current (per channel) |
No load, Vout = VCC/2 |
|
130 |
180 |
µA |
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-40°C < T< 125°C |
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180 |
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AC performance |
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GBP |
Gain bandwidth product |
RL > 1 MΩ, CL = 200 pF |
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1.3 |
|
MHz |
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Fu |
Unity gain frequency |
RL > 1 MΩ, CL = 200 pF |
|
1 |
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MHz |
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Φm |
Phase margin |
RL > 1 MΩ, CL = 200 pF |
|
60 |
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degrees |
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Gm |
Gain margin |
RL > 1 MΩ, CL = 200 pF |
|
10 |
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dB |
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SR |
Slew rate |
RL > 1 MΩ, CL = 200 pF |
|
0.7 |
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V/μs |
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Vout = 0.5 V to VCC - 0.5V |
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f = 1 kHz |
|
30 |
|
nV |
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en |
Equivalent input noise voltage |
f = 10 kHz |
|
20 |
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----------- |
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|
Hz |
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in |
Equivalent input noise current |
f = 1 kHz |
|
0.30 |
|
pA |
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----------- |
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Hz |
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fin = 1 kHz, ACL = 1, |
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THD+N |
Total harmonic distortion + noise |
RL = 10 kΩ, |
|
0.002 |
|
% |
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V |
ICM |
= V /2, BW = 22 kHz, |
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CC |
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Vout = 1 Vpp |
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1. See Chapter 4.4: Input offset voltage drift over temperature.
6/21 |
Doc ID 022943 Rev 2 |
LMX321, LMX358, LMX324 |
Electrical characteristics |
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|
Figure 2. Supply current vs. supply voltage at |
Figure 3. Vio distribution at VCC = 5 V |
Vicm = VCC/2 |
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0.20 |
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T=25°C |
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T=125°C |
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(mA) |
0.15 |
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Current |
0.10 |
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T=-40°C |
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Supply |
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0.05 |
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Vicm=Vcc/2 |
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0.00 |
3.0 |
3.5 |
4.0 |
4.5 |
5.0 |
5.5 |
|
2.5 |
Supply Voltage (V)
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30 |
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Vcc=5V |
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25 |
Vicm=2.5V |
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T=25°C |
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(%) |
20 |
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Population |
15 |
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10 |
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5 |
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0 |
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-4.0 |
-3.5 -3.0 |
-2.5 |
-2.0 |
-1.5 |
-1.0 |
-0.5 |
0.0 |
0.5 |
1.0 |
1.5 |
2.0 |
2.5 |
3.0 |
3.5 |
4.0 |
Input offset voltage (mV)
Figure 4. Input offset voltage vs. input |
Figure 5. Output current vs. output voltage at |
common mode voltage at VCC = 5 V |
VCC = 2.7 V |
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1.0 |
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0.9 |
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(mV) |
0.8 |
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0.7 |
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Voltage |
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0.6 |
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0.5 |
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Offset |
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0.4 |
T=125°C |
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T=25°C |
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0.3 |
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T=-40°C |
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Input |
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0.2 |
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0.1 |
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Vcc=5V |
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0.0 |
0.5 |
1.0 |
1.5 |
2.0 |
2.5 |
3.0 |
3.5 |
4.0 |
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0.0 |
Input Common Mode Voltage (V)
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30 |
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Sink |
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20 |
Vid=-1V |
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(mA) |
10 |
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T=125°C |
T=25°C |
T=-40°C |
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Current |
0 |
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Vcc=2.7V |
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Output |
-10 |
T=125°C |
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T=-40°C |
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T=25°C |
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-20 |
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Source |
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-30 |
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Vid=1V |
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0.0 |
0.5 |
1.0 |
1.5 |
2.0 |
2.5 |
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Output Voltage (V) |
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Figure 6. Output current vs. output voltage at Figure 7. VCC = 5 V
Output current vs. supply voltage at Vicm = VCC/2
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100 |
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75 |
Sink |
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T=25°C |
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T=-40°C |
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Vid=-1V |
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(mA) |
50 |
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25 |
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Current |
0 |
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T=125°C |
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Vcc=5V |
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-25 |
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Output |
T=125°C |
T=25°C |
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-50 |
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-75 |
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Source |
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T=-40°C |
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-100 |
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Vid=1V |
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0.0 |
0.5 |
1.0 |
1.5 |
2.0 |
2.5 |
3.0 |
3.5 |
4.0 |
4.5 |
5.0 |
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Output Voltage (V) |
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100 |
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75 |
Vid=Sink-1V |
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T=25°C |
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T=-40°C |
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(mA) |
50 |
T=125°C |
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25 |
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Current |
0 |
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Vicm=Vcc/2 |
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-25 |
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Output |
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-50 |
T=125°C |
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-75 |
Source |
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T=25°C |
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T=-40°C |
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-100 |
Vid=1V |
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2.5 |
3.0 |
3.5 |
4.0 |
4.5 |
5.0 |
5.5 |
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Supply Voltage (V) |
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Doc ID 022943 Rev 2 |
7/21 |