amplifiers comparators

LM321

Every spec below is cited to the manufacturer datasheet. Pick your exact ordering code, compare the closest alternatives, then ask the assistant what it means for your design.

00 — Overview

What the LM321 family does

The LM321 is a precision operational amplifier designed for single-supply operation across commercial, industrial, and military temperature ranges. It features a wide supply voltage range of 3 to 30 V, a gain bandwidth product of 1.3 MHz, and a quiescent current of 375 uA per amplifier. This device is typically used in applications requiring high precision and stability, such as active filters, integrators, and voltage followers. The LM321 maintains low offset voltage and drift, making it suitable for signal conditioning and measurement circuits where accuracy is critical. Its robust design ensures reliable performance in demanding environments.

Next step
Start building with LM321 → Every number above is cited straight from the datasheet — ask what they mean for your design, and the assistant answers from the same source documents.
01 — Key specifications

LM321 datasheet parameters

ParameterMinTypMaxConditionsSource
quiescent current — 160 µA 500 µA Over Full Temperature Range, RL = ∞ on all Op Amps; V+ = 30V; Block Diagram XBLW datasheet, p. 4 — Block Diagram
output current 20 mA 40 mA — VIN(+) = 1V, VIN(-) = 0V, V+ = 15V, Vo = 2V, Ta = 25°C; Block Diagram XBLW datasheet, p. 4 — Block Diagram
supply voltage range 3 V — 32 V XBLW datasheet, p. 2
input offset voltage — 2 mV 5 mV Ta = 25°C *Note 4; Block Diagram XBLW datasheet, p. 4 — Block Diagram
gain bandwidth — 1 MHz — XBLW datasheet, p. 2
cmrr 70 dB 90 dB — DC, Ta = 25°C, VCM = 0~V+-1.5V; common; Block Diagram XBLW datasheet, p. 4 — Block Diagram
operating temperature (abs max) -40 °C — 85 °C Absolute Maximum Ratings XBLW datasheet, p. 3 — Absolute Maximum Ratings
input offset current — 3 nA 30 nA Ta = 25°C, IIN(+)- IIN(-), VCM = 0V; Block Diagram XBLW datasheet, p. 4 — Block Diagram
input bias current — 45 nA 150 nA Ta = 25°C, IIN(+)or IIN(-), VCM = 0V*Note 5; Block Diagram XBLW datasheet, p. 4 — Block Diagram
slew rate — 0.4 V/µs — XBLW datasheet, p. 2
psrr 75 dB 100 dB — DC, Ta = 25°C, V+ = 5~30V; Block Diagram XBLW datasheet, p. 4 — Block Diagram
channel count — 1 — XBLW datasheet, p. 1
03 — Alternatives

Closest matches to LM321

LM158 4.4× higher quiescent current, 2.2× lower input bias current, 1.6× higher operating temperature
LM258A 4.4× higher quiescent current, 2.2× lower input bias current, 2.0× lower input offset voltage
LM741 10.6× higher quiescent current, 6.7× higher input offset current, 2.0× lower input offset voltage
LMV358 4.3× lower supply voltage range, 4.1× lower input bias current, 2.0× lower quiescent current
LM158DR 6.3× higher quiescent current, 1.5× higher slew rate, 1.4× higher operating temperature
LM321MF 4.1× higher quiescent current, similar cmrr, similar gain bandwidth
LM124 4.4× higher quiescent current, 2.2× lower input bias current, 1.6× higher operating temperature
LM258 9.4× higher quiescent current, 2.2× lower input bias current, 1.5× lower input offset current
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