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BDM321

Public Made by Adom

by adom

Bardeen Micro Operational Amplifier, SOT-23-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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BDM321

Bardeen Micro · Operational Amplifier · SOT-23-5

BDM321 from Bardeen Micro, in a SOT-23-5. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 IN+ input Non-inverting input; rail-to-rail common-mode range extends 100mV beyond the supply rails (VSS-0.1V to VDD+0.1V), absolute maximum VSS-0.5V to VDD+0.5V.
2 VSS power_in Negative supply / ground pin; for single-supply operation (2.1V to 5.5V) connect to ground.
3 IN- input Inverting input; rail-to-rail common-mode range extends 100mV beyond the supply rails (VSS-0.1V to VDD+0.1V), absolute maximum VSS-0.5V to VDD+0.5V.
4 OUT output Rail-to-rail amplifier output, unity-gain stable, optimized for bandwidth rather than capacitive loads; typical short-circuit source/sink current 84mA/75mA at 5V.
5 VDD power_in Positive supply, 2.1V to 5.5V operating (7.5V absolute maximum VDD to VSS), with a 0.1µF ceramic bypass capacitor placed close to the pin.

Key specifications

Parameter Value
Manufacturer Bardeen Micro
Package SOT-23-5
Category Amplifiers/Comparators
Pins 5

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Power Supply Voltage (VDD to Vss) -0.5 7.5 V 2
PDB Input Voltage 7 V 2
Operating Temperature Range -40 125 °C 2
Junction Temperature 160 °C 2
Storage Temperature Range -55 150 °C 2
Lead Temperature (soldering, 10sec) 260 °C 10 sec soldering 2
Package Thermal Resistance, SOT23-5 θJA θJA 190 °C/W TA=+25℃ 2
ESD Susceptibility HBM 6 KV HBM 2
ESD Susceptibility MM 300 V MM 2
Input Offset Voltage VOS 0.4 3.5 mV VCM = VS/2; MAX at +25℃ 3
Input Offset Voltage VOS 5.6 mV VCM = VS/2; -40℃ to +85℃ 3
Common-Mode Voltage Range VCM -0.1 5.6 V VS = 5.5V 3
Common-Mode Rejection Ratio CMRR 62 70 dB VS = 5.5V, VCM = -0.1V to 4V; MIN at +25℃ 3
Common-Mode Rejection Ratio CMRR 62 dB VS = 5.5V, VCM = -0.1V to 4V; MIN over -40℃ to +85℃ 3
Common-Mode Rejection Ratio CMRR 56 68 dB VS = 5.5V, VCM = -0.1V to 5.6V; MIN at +25℃ 3
Common-Mode Rejection Ratio CMRR 55 dB VS = 5.5V, VCM = -0.1V to 5.6V; MIN over -40℃ to +85℃ 3
Open-Loop Voltage Gain AOL 70 80 dB RL = 5kΩ, VO = +0.1V to +4.9V; MIN at +25℃ 3
Open-Loop Voltage Gain AOL 70 dB RL = 5kΩ, VO = +0.1V to +4.9V; MIN over -40℃ to +85℃ 3
Open-Loop Voltage Gain AOL 94 100 dB RL = 10kΩ, VO = +0.1V to +4.9V; MIN at +25℃ 3
Open-Loop Voltage Gain AOL 85 dB RL = 10kΩ, VO = +0.1V to +4.9V; MIN over -40℃ to +85℃ 3
Output Voltage Swing from Rail, high VOH 4.99 4.997 V RL = 100kΩ; MIN at +25℃ 3
Output Voltage Swing from Rail, high VOH 4.98 V RL = 100kΩ; MIN over -40℃ to +85℃ 3
Output Voltage Swing from Rail, low VOL 3 10 mV RL = 100kΩ; MAX at +25℃ 3
Output Voltage Swing from Rail, low VOL 20 mV RL = 100kΩ; MAX over -40℃ to +85℃ 3
Output Voltage Swing from Rail, high VOH 4.97 4.992 V RL = 10kΩ; MIN at +25℃ 3
Output Voltage Swing from Rail, high VOH 4.96 V RL = 10kΩ; MIN over -40℃ to +85℃ 3
Output Voltage Swing from Rail, low VOL 8 30 mV RL = 10kΩ; MAX at +25℃ 3
Output Voltage Swing from Rail, low VOL 40 mV RL = 10kΩ; MAX over -40℃ to +85℃ 3
Output Current, source ISOURCE 60 84 mA RL = 10Ω to VS/2; MIN at +25℃ 3
Output Current, source ISOURCE 45 mA RL = 10Ω to VS/2; MIN over -40℃ to +85℃ 3
Output Current, sink ISINK 60 75 mA RL = 10Ω to VS/2; MIN at +25℃ 3
Output Current, sink ISINK 45 mA RL = 10Ω to VS/2; MIN over -40℃ to +85℃ 3
Operating Voltage Range, minimum 2.1 V MIN at +25℃ 3
Operating Voltage Range, minimum 2.5 V MIN over -40℃ to +85℃ 3
Operating Voltage Range, maximum 5.5 V MAX at +25℃ 3
Power Supply Rejection Ratio PSRR 60 82 dB VS = +2.5V to +5.5V, VCM = +0.5V; MIN at +25℃ 3
Power Supply Rejection Ratio PSRR 58 dB VS = +2.5V to +5.5V, VCM = +0.5V; MIN over -40℃ to +85℃ 3
Input Bias Current IB 1 pA 3
Input Offset Current IOS 1 pA 3
Input Offset Voltage Drift ∆VOS/∆T 2.7 µV/℃ 3
Quiescent Current / Amplifier IQ 40 µA 3
Gain-Bandwidth Product GBP 1 MHz 3
Slew Rate 0.6 V/µs G = +1, 2V Output Step 3
Settling Time to 0.1% tS 5 µs G = +1, 2V Output Step 3
Overload Recovery Time 2.6 µs VIN ·Gain = VS 3
Voltage Noise Density en 27 nV / Hz f = 1kHz 3
Voltage Noise Density en 20 nV / Hz f = 10kHz 3

CAD (KiCad official)

  • Symbol: BDM321
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5 (KiCad packages3D, STEP)
  • 3D model files: bdm321-etched.step / bdm321-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bdm321.step / bdm321.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Bardeen Micro datasheet (10 pp, sha256 34710bac3bca3ea2, retrieved 2026-10-19, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF