LM324

Part: LM324B / LM324BA / LM2902B / LM2902BA (LMx24 family) — Texas Instruments

Type: Quadruple Operational Amplifier

Description: Quad 3–36 V (B/BA versions) general-purpose op amps with 3 mV max offset (2 mV for BA), 240 μA typical quiescent current per amplifier, and integrated EMI/RF filtering.

Operating Conditions:

• Supply voltage: 3–36 V (B, BA versions); 3–26 V (LM2902); 3–30 V (other LMx24 versions)
• Operating temperature: -40 to 85 °C for LM324B/BA (grade-dependent: LM2902B/BA -40 to 125 °C; LM324 0 to 70 °C; LM224 -25 to 85 °C; LM124 -55 to 125 °C)
• Common-mode voltage: 0 to VCC - 2 V (recommended operating conditions)

Absolute Maximum Ratings:

• Differential input voltage: ±40 V (B/BA); ±26 V (LM2902); ±32 V (others)
• Input voltage (either input): -0.3 to 40 V (B/BA)
• Operating virtual junction temperature: 150 °C
• Storage temperature: -65 to 150 °C
• Output short circuit to ground: unlimited duration (TA ≤ 25 °C, VCC ≤ 15 V)

Key Specs:

• Input offset voltage (LM324B, 25 °C): ±0.6 mV typ, ±3.0 mV max; ±4.0 mV max over -40 to 85 °C
• Input offset voltage (LM324BA, 25 °C): ±0.3 mV typ, ±2 mV max
• Offset voltage drift: ±7 μV/°C typ (-40 to 85 °C)
• Input bias current: -10 nA typ, -35 nA max at 25 °C; -60 nA max over -40 to 85 °C
• Input offset current: ±0.5 nA typ
• PSRR: 65 dB min, 100 dB typ
• CMRR: 70 dB min, 80 dB typ (VS = 3–36 V)
• Common-mode range: V- to (V+) - 1.5 V (VS = 3–36 V, 25 °C)
• Input voltage noise density: 35 nV/√Hz at 1 kHz
• Channel separation: 120 dB typ (1–20 kHz)

Features:

• Next-generation B versions, drop-in replacements for all LM224, LM324, and LM2902 versions
• Common-mode input range includes V-
• Integrated RF and EMI filter
• ESD: 2 kV HBM, 1.5 kV CDM (marketing figures)
• Differential input voltage drivable up to the supply voltage
• Unity-gain stable

Applications:

• Merchant network and server power supply units
• Multi-function printers
• Power supplies and mobile chargers
• Desktop PC and motherboard
• Indoor and outdoor air conditioners
• Washers, dryers, and refrigerators
• AC inverters, string inverters, central inverters, and voltage frequency drives
• Uninterruptible power supplies

Package:

• D (SOIC, 14): 8.65 mm × 6 mm
• PW (TSSOP, 14): 5 mm × 6.4 mm
• N (PDIP, 14): 19.3 mm × 9.4 mm
• NS (SOP, 14): 10.3 mm × 7.8 mm
• DB (SSOP, 14): 6.2 mm × 7.8 mm
• FK (LCCC, 20): 8.89 mm × 8.89 mm
• J (CDIP, 14): 19.56 mm × 6.67 mm
• W (CFP, 14): 9.21 mm × 6.3 mm
• RTE (WQFN, 16): 3 mm × 3 mm

• Next-generation LM324B and LM2902B
• B versions are drop-in replacements for all versions of LM224, LM324, and LM2902
• Improved specifications of B version
• -Supply range: 3V to 36V (B, BA versions)
• -Low input offset voltage: ±2mV (BA version) / 3mV (B version)
• -ESD rating: 2kV (HBM), 1.5kV (CDM)
• -EMI rejection: integrated RF and EMI filter
• -Low input bias current: 50nA maximum (across -40°C to +125°C)
• Common-mode input voltage range includes V-
• Input voltage differential are drivable up to the supply voltage
• For dual B versions, see LM358B and LM2904B

• Merchant network and server power supply units
• Multi-function printers
• Power supplies and mobile chargers
• Desktop PC and motherboard
• Indoor and outdoor air conditioners
• Washers, dryers, and refrigerators
• AC inverters, string inverters, central inverters, and voltage frequency drives
• Uninterruptible power supplies

Figure 5-1. D, DB, J, N, NS, PW, W Packages, 14-Pin SOIC, SSOP, CDIP, PDIP, SO, TSSOP, CFP (Top View)

Table 5-1. Pin Functions

Figure 5-2. FK Package, 20-Pin LCCC (Top View)

Figure 5-3. RTE Package, 16-Pin WQFN (Top View)

Figure 5-2. FK Package, 20-Pin LCCC (Top View)

Table 5-2. Pin Functions

Table 5-2. Pin Functions

for V S = (V+) - (V-) = 5V to 36V (±2.5V to ±18V), at T A = 25°C, V CM = V OUT = VS / 2, and RL = 10k connected to V S / 2 (unless otherwise noted)

SLOS066AE - AUGUST 1975 - REVISED SEPTEMBER 2025

SLOS066AE - AUGUST 1975 - REVISED SEPTEMBER 2025

over operating free-air temperature range (unless otherwise noted) (1)

• (2) All voltage values (except differential voltages and V CC specified for the measurement of I OS ) are with respect to the network GND.
• (3) Differential voltages are at IN+, with respect to IN-.
• (4) Short circuits from outputs to V CC can cause excessive heating and eventual destruction.

over operating free-air temperature range (unless otherwise noted)

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The LMx24 and LM2902 operational amplifiers are useful in a wide range of signal conditioning applications. Inputs are able to be powered before VCC for flexibility in multiple supply circuits.