AS321
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.
What the AS321 family does
The AS321 is a low power, single operational amplifier designed for single or split power supply operation. It features a wide power supply voltage range from 3V to 36V, a large voltage gain of 100dB, and a low input bias current of 20nA. The device maintains a low supply current of 0.35mA at 5V and offers a wide input common mode voltage range. Typically used in battery chargers, active filters, and general purpose controllers, the AS321 is available in lead-free SOT25 packages for industrial applications.
Next step
Start building with AS321 →
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.
AS321 datasheet parameters
| Parameter | Min | Typ | Max | Conditions | Source |
|---|---|---|---|---|---|
| quiescent current | — | 350 µA | 800 µA | RL = ∞, VCC = 5V; icc; Recommended Operating Conditions | Diodes datasheet, p. 4 — Recommended Operating Conditions |
| output current | — | 40 mA | 60 mA | VCC = 15V; isc; Recommended Operating Conditions | Diodes datasheet, p. 4 — Recommended Operating Conditions |
| supply voltage range | 3 V | — | 36 V | vcc; Recommended Operating Conditions | Diodes datasheet, p. 3 — Recommended Operating Conditions |
| input offset voltage drift | — | 7 µV/°C | — | TA = -40°C to +85°C | Diodes datasheet, p. 4 — Recommended Operating Conditions |
| input offset voltage | — | 2 mV | 5 mV | VO = 1.4V, RS = 0Ω, VCC = 5V to 30V(Note 6); vio; Recommended Operating Conditions | Diodes datasheet, p. 4 — Recommended Operating Conditions |
| gain bandwidth | — | 1 MHz | — | Open loop gain vs. frequency, unity gain crossing (VCC = 30V, VEE = 0V, RL = 2kΩ, CL = 100pF) | Diodes datasheet, p. 5 |
| cmrr | 60 dB | 70 dB | — | VCM = 0V to (VCC-1.5)V, RS≤ 10kΩ; cmrr; Recommended Operating Conditions | Diodes datasheet, p. 4 — Recommended Operating Conditions |
| operating temperature | -40 °C | — | 85 °C | ta; Recommended Operating Conditions | Diodes datasheet, p. 3 — Recommended Operating Conditions |
| input offset current | — | 5 nA | 30 nA | IIN+- IIN-, VCM = 0V; iio; Recommended Operating Conditions | Diodes datasheet, p. 4 — Recommended Operating Conditions |
| input bias current | — | 20 nA | 100 nA | IIN+or IIN-, VCM = 0V; ibias; Recommended Operating Conditions | Diodes datasheet, p. 4 — Recommended Operating Conditions |
| psrr | 70 dB | 100 dB | — | VCC = 5V to 30V, RS≤ 10kΩ; psrr; Recommended Operating Conditions | Diodes datasheet, p. 4 — Recommended Operating Conditions |
| output voltage low | — | 5 mV | 20 mV | VCC = 5V, RL = 10kΩ; vol; Recommended Operating Conditions | Diodes datasheet, p. 4 — Recommended Operating Conditions |
| channel count | — | 1 | — | Diodes datasheet, p. 1 |
Closest matches to AS321
LM158
2.5× lower input offset current, 2.0× higher quiescent current, 1.6× higher operating temperature
LM258A
2.5× lower input offset current, 2.0× lower input offset voltage, 2.0× higher quiescent current
AS358
2.0× higher quiescent current, similar cmrr, similar input bias current
LM124
2.5× lower input offset current, 2.5× higher output voltage low, 2.0× higher quiescent current
LM258
4.3× higher quiescent current, 2.5× lower input offset current, 1.4× higher operating temperature
LM2904
4.3× higher quiescent current, 2.5× lower input offset current, 1.9× higher operating temperature
LM324ADR
2.5× lower input offset current, 2.0× lower output current, 2.0× higher quiescent current
LMV358
4.8× lower supply voltage range, 4.4× lower quiescent current, 3.5× lower input offset voltage drift
Design help
What do I need around the AS321? →