LM124
Every spec below is cited to the manufacturer datasheet. Compare the closest alternatives, then ask the assistant what it means for your design.
What the LM124 does
The LM124, LM224x, and LM324x are low-power quad operational amplifiers available in commercial, industrial, and military temperature grades. These devices feature a wide gain bandwidth of 1.3 MHz, a large voltage gain of 100 dB, and a very low supply current of 375 µA per amplifier. The input common mode voltage range includes ground, and the input offset voltage is 3 mV maximum. They operate from a single power supply ranging from 3 V to 30 V or dual supplies from ±1.5 V to ±15 V. Engineers typically use these amplifiers in applications requiring high gain and low power consumption across a broad voltage range.
Datasheet parameters
| Parameter | Min | Typ | Max | Conditions | Source |
|---|---|---|---|---|---|
| quiescent current | — | 700 µA | 1.2 mA | Tamb = 25 °C, VCC = 5V; icc; $ VCC + = 5 \, V, VCC = \text{ground}, V0 = 1.4 \, V, Tamb = 25 \, ^{\circ}C $ (unless otherwise specified) | ST datasheet, p. 6 — Table 3. (unless otherwise specified) |
| output current | 20 mA | 40 mA | 70 mA | VCC = 15 V, Vo = 2 V; isource; $ VCC + = 5 \, V, VCC = \text{ground}, V0 = 1.4 \, V, Tamb = 25 \, ^{\circ}C $ (unless otherwise specified) | ST datasheet, p. 6 — Table 3. (unless otherwise specified) |
| supply voltage range | 3 V | — | 30 V | 8. Recommended Operating Conditions | UTD datasheet, p. 4 — 8. Recommended Operating Conditions |
| input offset voltage drift | — | 7 µV/°C | — | ST datasheet, p. 7 — 3 Electrical characteristics | |
| input offset voltage | — | 3 mV | 5 mV | VCC = 5Vto MAX; 25°C; {io}; 10. Electrical Characteristics (LMx24) | UTD datasheet, p. 5 — 10. Electrical Characteristics (LMx24) |
| gain bandwidth | — | 1.2 MHz | — | R_L = 1\text{ M}\Omega, C_L = 20\text{ pF}(see Figure 1); Operating Conditions | TI datasheet, p. 7 — Operating Conditions |
| cmrr | 70 dB | 80 dB | — | Tamb = 25 °C; cmr; $ VCC + = 5 \, V, VCC = \text{ground}, V0 = 1.4 \, V, Tamb = 25 \, ^{\circ}C $ (unless otherwise specified) | ST datasheet, p. 6 — Table 3. (unless otherwise specified) |
| operating temperature | -40 °C | — | 105 °C | 8. Recommended Operating Conditions | UTD datasheet, p. 4 — 8. Recommended Operating Conditions |
| power dissipation (abs max) | — | — | 400 mW | ptot; Absolute maximum ratings | ST datasheet, p. 4 — Table 1. Absolute maximum ratings |
| input offset current | — | 2 nA | 20 nA | Tamb = 25 °C; iio; $ VCC + = 5 \, V, VCC = \text{ground}, V0 = 1.4 \, V, Tamb = 25 \, ^{\circ}C $ (unless otherwise specified) | ST datasheet, p. 6 — Table 3. (unless otherwise specified) |
| input bias current | — | 20 nA | 100 nA | Tamb = 25 °C; iib; $ VCC + = 5 \, V, VCC = \text{ground}, V0 = 1.4 \, V, Tamb = 25 \, ^{\circ}C $ (unless otherwise specified) | ST datasheet, p. 6 — Table 3. (unless otherwise specified) |
| slew rate | — | 0.4 V/µs | — | VCC = 15 V, Vi = 0.5 to 3 V, RL = 2 kΩ, CL = 100 pF, unity gain; 3 Electrical characteristics | ST datasheet, p. 7 — 3 Electrical characteristics |
| psrr | 65 dB | 110 dB | — | Tamb = 25 °C; $ VCC + = 5 \, V, VCC = \text{ground}, V0 = 1.4 \, V, Tamb = 25 \, ^{\circ}C $ (unless otherwise specified) | ST datasheet, p. 6 — Table 3. (unless otherwise specified) |
| input voltage noise density | — | 35 nV/√Hz | — | RS = 100Ω, Vi = 0V, f = 1kHz (see Figure 8); equivalent | UTD datasheet, p. 6 — 11. Operating Conditions |
| output voltage high | 27 V | 28 V | — | VCC = MAX; Full range; at specified free-air temperature, VCC = 5 V (unless otherwise noted) | TI datasheet, p. 4 — Electrical Characteristics |
| output voltage low | 5 mV | — | 20 mV | RL≤ 10 kΩ; Full range; at specified free-air temperature, VCC = 5 V (unless otherwise noted) | TI datasheet, p. 4 — Electrical Characteristics |
| channel count | — | 4 | — | ST datasheet, p. 1 |
Closest matches to LM124
Frequently asked questions
How many channels does the LM124 have?
The LM124 has 4 channels.
What is the CMRR of the LM124 at Tamb = 25 °C with VCC+ = 5 V, VCC = ground, and V0 = 1.4 V?
The CMRR is 80 dB.
What is the gain bandwidth of the LM124?
The gain bandwidth is 1.2 MHz when R_L = 1 MΩ, C_L = 20 pF under Operating Conditions.
What is the input bias current (iib) of the LM124 at Tamb = 25 °C with VCC+ = 5 V, VCC = ground, and V0 = 1.4 V?
The input bias current is 20 nA.
What is the input offset current (iio) at Tamb = 25 °C with VCC+ = 5 V, VCC- = ground, and V0 = 1.4 V?
The input offset current is 2 nA.
What is the input offset voltage for the LM124?
The input offset voltage is 3 mV at VCC = 5Vto MAX, 25°C, and {io} = 10.
What is the input offset voltage drift for the LM124?
The input offset voltage drift is 7 µV/°C.
What is the input voltage noise density when RS = 100Ω, Vi = 0V, and f = 1kHz?
The input voltage noise density is 35 nV/√Hz.
What is the maximum operating temperature specified in section 8, Recommended Operating Conditions?
The maximum operating temperature is 105 °C.
What is the output current specification for the LM124 when VCC = 15 V, Vo = 2 V, isource, VCC+ = 5 V, VCC = ground, V0 = 1.4 V, and Tamb = 25 °C?
The output current is 40 mA.
What is the output voltage high specification for the LM124?
The output voltage high is 28 V when VCC = MAX, Full range, at specified free-air temperature, VCC = 5 V (unless otherwise noted).
What is the output voltage low specification for the LM124?
The output voltage low is 20 mV when RL≤ 10 kΩ, Full range, at specified free-air temperature, VCC = 5 V (unless otherwise noted).