2 layers36.5 × 56 mm
Overview
The LM321 is an operational Amplifier made by PJSEMI in a SOT-23-5 package with 5 pins. 0℃~+70℃ 1 2mV 3nA 400V/ms 40mA 430uA 45nA 90dB SOT-23-5 Operational Amplifier ROHS.
PCBKit's library has its KiCad symbol (Amplifier_Operational:LM321, from KiCad's library) and its footprint (Package_TO_SOT_SMD:SOT-23-5, from KiCad's library), ready for a KiCad board. 11,674 are in stock at JLCPCB (part C686636). 99 open-source boards in 75 repositories on GitHub use it.
Symbol
Footprint
From the datasheet
5- Supply, absolute maximum
- 24 V · VCC, absolute maximum single supply; ±12 V dual supply · p. 2
- Works from
- 0 °C · Operating temperature, min · p. 2
- Works up to
- 70 °C · Operating temperature, max · p. 2
- Junction, hottest
- 150 °C · Junction temperature, max · p. 2
- Takes working
- 500 µA · VCC = 5 V, RL = ∞, typical supply current · p. 2
What it is and has
5- Amplifier
- Low power single operational amplifier · p. 1
- Quiescent current
- Low · p. 1
- Input bias current
- Low · p. 1
- Supply voltage
- Wide range · p. 1
- Load stability
- High capacity load stability · p. 1
Specifications
25| Parameter | Conditions | As printed | Page |
|---|---|---|---|
| Supply Voltage VCC | Single supply | max 24 V | 2 |
| Supply Voltage VCC | Dual supply, ±12 V | min -12 · max 12 V | 2 |
| Differential Input Voltage VID | max 24 V | 2 | |
| Input Voltage VIN | Upper limit VCC | min -0.3 V | 2 |
| Power Dissipation PD | max 530 mW | 2 | |
| Input Current IIN | VIN<-0.3V | max 50 mA | 2 |
| Junction Temperature TJ | max 150 °C | 2 | |
| Operating Temperature Range TOPR | min 0 · max 70 °C | 2 | |
| Storage Temperature Range TSTG | min -65 · max 150 °C | 2 | |
| Input Offset Voltage VOS | VCC=5V, Ta=25℃; typical and maximum are ± magnitudes | typ 2 · max 5 mV | 2 |
| Input offset current lOS | VCC=5V, Ta=25℃,IIN(+) - IIN(-)，VCM=0V; typical and maximum are ± magnitudes | typ 3 · max 50 nA | 2 |
| Input bias current lB | VCC=5V, Ta=25℃,IIN(+) or IIN(-)，VCM=0V; typical and maximum are ± magnitudes | typ 45 · max 250 nA | 2 |
| Common-mode input voltage range VCM | Ta=25℃,V+=24V; maximum VCC-1.5 | min 0 V | 2 |
| Supply current IS | VCC=24V, RL =∞ | typ 0.7 · max 2 mA | 2 |
| Supply current IS | VCC=5V , RL =∞ | typ 0.5 · max 1.2 mA | 2 |
| Common Mode Rejection CMRR | VCC=5V, VCM = 0~VCC-1.5V, Ta=25℃, DC | min 65 · typ 90 dB | 2 |
| Power Supply Rejection PSRR | VCC = 5V~24V, Ta=25℃, DC | min 65 · typ 100 dB | 2 |
| Large signal voltage gain AV | VCC = 15V,Ta=25℃,RL≥ 2kΩ(for VO=1~11V) | min 25 · typ 100 V/mV | 2 |
| Output voltage swing VO | VOH, VCC = 24V,RL= 2 kΩ | min 22 V | 2 |
| Output voltage swing VO | VOH, VCC = 24V,RL=10 kΩ | min 22 V | 2 |
| Output voltage swing VO | VOL, VCC = 5V,RL=10 kΩ | typ 5 · max 20 mV | 2 |
| Output Current Sourcing ISource | VIN(+) =1V,VIN(-) =0V,VCC=15V, VO=2V,Ta=25℃ | min 20 · typ 40 mA | 2 |
| Output Current Sinking ISINK | VIN(+) =0V,VIN(-) =1V,VCC=15V, VO=2V,Ta=25℃ | min 10 · typ 15 mA | 2 |
| Output Current Sinking ISINK | VIN(+) =0V,VIN(-) =1V,VCC=15V, VO=200mV,Ta=25℃ | min 12 · typ 50 uA | 2 |
| Output Short Circuit to Ground IO | VCC=15V,Ta=25℃ | typ 40 · max 60 mA | 2 |
Pins, by the datasheet
5- 1 +IN
- Non-inverting input. · p. 1
- 2 V-
- Negative supply. · p. 1
- 3 -IN
- Inverting input. · p. 1
- 4 OUT
- Amplifier output. · p. 1
- 5 V+
- Positive supply. · p. 1
Ordering codes, by the datasheet
1- LM321
- SOT-23-5 · 3,000/ Tape & Reel (7 inches) · p. 5
Parameters
12- Common Mode Rejection Ratio(CMRR)
- 90dB
- Current - Supply
- 500uA
- Ib - Input Bias Current
- 45nA
- Input Offset Current(Ios)
- 3nA
- Junction Temperature(Max)
- 150℃
- Number of Channels
- 1
- Operating Temperature
- 0℃~+70℃
- Output Current
- 40mA
- Quiescent Current
- 430uA
- Slew Rate
- 400V/ms
- Voltage - Supply(Absolute Max)
- 24V
- Vos - Input Offset Voltage
- 2mV
Order codes
1- LM321LCSC C686636
Pinout
5| Pin | Name | Type |
|---|---|---|
| 1 | + | Input |
| 2 | V- | Power in |
| 3 | - | Input |
| 4 | — | Output |
| 5 | V+ | Power in |
Open-source boards using it
All 99- 4 layers17.5 × 35 mm
KungFuSID
Sgw32/KungFuSID
Kung Fu SID is a firmware based on Kung Fu Flash which allows SID emulation
35 parts65 - 2 layers99 × 99.8 mm
- 2 layers13 × 10.2 mm
- 4 layers100 × 100 mm
PCB Motor
SaralTayal123/PCB_Motors
Code & Firmware to generate continuous coil PCB motor designs
33 parts10 - 4 layers100 × 50 mm
Psu ext
PSU-Ext-Org/psu-ext-hardware
A repository to store PSU-EXT hardware design assets, schematics, circuit diagrams, CAD files and manufacturing data.
137 parts9CERN-OHL-S-2.0 - 4 layers86.4 × 69.9 mm
- 2 layers55 × 53 mm
Heatgun
m24h/heatgun
A small hot air station for soldering, using type-858 heat gun as handle, STC8G1k17 as MCU, copper wire resistor for cold junction compensation
40 parts3Apache-2.0
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Is there a KiCad symbol and footprint for the LM321?
Yes. The symbol is Amplifier_Operational:LM321 and the footprint Package_TO_SOT_SMD:SOT-23-5, both drawn on this page. PCBKit places them on a board for you when you design with it.
What package is the LM321?
SOT-23-5, with 5 pins. Its footprint is drawn on this page.
Where is the LM321 datasheet?
PJSEMI publishes it: the Datasheet link on this page opens it.
Where can I order the LM321?
JLCPCB lists it as part C686636, with 11,674 in stock; the sellers' links on this page open their listings.
What can replace the LM321?
Parts like it in the library: the LM321MF by UMW, the TLV9061IDBV by Texas Instruments, the LM321-TR by Gainsil and the LM321MFX by Texas Instruments. Check their datasheets: a part that fits the footprint may still differ in its ratings.
Which open-source boards use the LM321?
99 boards in 75 repositories on GitHub; the most starred are listed on this page, with their KiCad files.
Parts like it
8
LM321MF
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SOT-23-5-40℃~+125℃ 0.05pA 0.5pA 1 1.6mV 1.8V~5.5V 103dB 10MHz 10nV/√Hz@1kHz 50mA 530nV/℃ 538uA 6.5V/us Enable/shutdown function、ESD protection、EMI filtering/RF suppression Rail-to-Rail Input, Rail-to-Rail Output SOT-23-5 Operational Amplifier ROHSTexas InstrumentsOperational AmplifierLM321-TR
SOT-23-5-14V~-1.5V、1.5V~14V -25℃~+85℃ 1 120uA 1MHz 200V/ms 3V~28V 45nA 5mV 5nA 60mA 70dB 7uV/℃ Built-in compensation SOT-23-5 Operational Amplifier ROHSGainsilOperational AmplifierLM321MFX
SOT-23-5-40℃~+85℃ 1 1MHz 3V~30V 400V/ms 40mA 40nV/√Hz@1kHz 430uA 500nA 5nA 7mV 85dB SOT-23-5 Operational Amplifier ROHSTexas InstrumentsOperational AmplifierAS321KTR-G1
SOT-23-5-18V~-1.5V、1.5V~18V -40℃~+85℃ 1 20nA 2mV 30nA 350uA 3V~36V 40mA 70dB 7uV/℃ Built-in compensation SOT-23-5 Operational Amplifier ROHSDiodes IncorporatedOperational AmplifierLM321DTR(XBLW)
SOT-23-5-40℃~+85℃ 1 100uA 1MHz 2mV 3V~32V 3nA 400V/ms 40mA 45nA 90dB SOT-23-5 Operational Amplifier ROHSXBLWOperational AmplifierTLV9001IDBV
SOT-23-5-2.75V~-900mV、900mV~2.75V -40℃~+125℃ 1 1.6mV 1.8V~5.5V 1MHz 2V/us 2pA 4.7nV/√Hz@1kHz 40mA 5pA 600nV/℃ 60uA 86dB Enable/shutdown function、EMI filtering/RF suppression Rail-to-Rail Input, Rail-to-Rail Output SOT-23-5 Operational Amplifier ROHSTexas InstrumentsOperational AmplifierLM321LVIDBV
SOT-23-5-2.75V~-1.35V、1.35V~2.75V -40℃~+125℃ 1 1.5V/us 15pA 1MHz 1mV 2.7V~5.5V 40mA 4uV/℃ 5.1nV/√Hz@1kHz 5pA 84dB 90uA Built-in compensation、ESD protection SOT-23-5 Operational Amplifier ROHSTexas InstrumentsOperational Amplifier