The LM324ADR from Texas Instruments is a quad 30-V 1.2-MHz operational amplifier in a 14-pin SOIC package with tape-and-reel packaging. It contains four independent high-gain internally compensated op-amps designed for single-supply operation from 3 V to 30 V. Key specs include 1.2-MHz gain bandwidth product, 0.5-V\/\u00b5s slew rate, 3-mV max input offset voltage (A-grade), 0.175-mA per-channel quiescent current, and 100-dB voltage gain. The input common-mode range includes ground and the output swings from near 0 V to VCC-1.5 V. Operating temperature range is 0\u00b0C to +70\u00b0C. The ‘A’ suffix denotes improved offset specification; ‘DR’ denotes SOIC-14 tape-and-reel.<\/p>","protected":false},"excerpt":{"rendered":"
The LM324ADR from Texas Instruments is a quad 30-V 1.2-MHz operational amplifier in a 14-pin SOIC package with tape-and-reel packaging. It contains four independent high-gain internally compensated op-amps designed for single-supply operation from 3 V to 30 V. Key specs include 1.2-MHz gain bandwidth product, 0.5-V\/\u00b5s slew rate, 3-mV max input offset voltage (A-grade), 0.175-mA […]<\/p>\n","protected":false},"author":2,"featured_media":2885,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[19,13],"tags":[],"chip_brand":[138],"class_list":["post-2054","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-analog-linear-ics","category-integrated-circuits-ics","chip_brand-ti"],"acf":{"brief_explanation":"Quad op-amp A-grade, 3-30V single supply, 1.2MHz GBW, 3mV Vos, 100dB gain, SOIC-14 T&R, 0~70\u00b0C","date_code":"","package_case":"SOIC-14 (D) (8.65 x 3.9 x 1.5 mm, 1.27mm pitch)","in_stock":13636,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/lm324.pdf","price":"$0.35 (1K+ pcs)","product_introduction":"The LM324ADR from TI is the A-grade, SOIC-14 tape-and-reel version of the industry-standard LM324 quad operational amplifier. The A-grade improves the maximum input offset voltage from 7 mV (standard LM324) to 3 mV, providing better DC precision for measurement and control applications. The device is pin-compatible with all LM324 variants across manufacturers.\n\nThe LM324 family is one of the most produced op-amp ICs in history, used in virtually every category of electronics. The four amplifiers share common VCC and GND, with each having independent inputs and outputs. The input common-mode voltage range includes ground, enabling direct single-supply sensing of signals near the negative rail without level shifting.\n\nNote that TI has discontinued the LM324AD (tube package) but continues to offer the LM324ADR (tape-and-reel). TI recommends the LM324B as the next-generation replacement, offering 3-36 V supply range, 3-mV max Vos, integrated EMI filtering, 2-kV HBM ESD protection, and -40\u00b0C to +125\u00b0C temperature range.\n\nThe LM324ADR is electrically identical to the LM324ADT from ST and the LM324ADR2G from onsemi. All three are pin-compatible and interchangeable in most applications. The TI version offers 1.2-MHz GBW vs the ST version's 1.3-MHz GBW \u2014 a negligible difference in practice.","working_principle":"**Bipolar Input Stage:** Each amplifier uses a PNP differential input pair with a current-mirror active load. The PNP inputs enable the common-mode range to include ground and extend -0.3 V below it. Input bias current (45 nA typical) flows out of the input pins.\n\n**Internal Compensation:** Dominant-pole compensation sets unity-gain bandwidth to 1.2 MHz and slew rate to 0.5 V\/\u00b5s, ensuring stability in voltage-follower configurations without external capacitors.\n\n**Class-AB Output:** The output can source 40 mA (Darlington pull-up) and sink approximately 20 mA at VCC = 15 V. The output cannot swing fully to ground under load due to the asymmetric drive \u2014 a pull-down resistor helps reach near-zero volts.\n\n**Single-Supply Architecture:** Internal bias network operates from a single positive supply with no negative supply required, reducing system complexity.","pin_description":"
| Pin<\/th> | Name<\/th> | Type<\/th> | Description<\/th><\/tr><\/thead> | ||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1<\/td> | 1OUT<\/td> | O<\/td> | Amplifier 1 output; swings 5mV to VCC-1.5V; \u00b140mA drive<\/td><\/tr> | ||||||||||||||||||||||||||
| 2<\/td> | 1IN-<\/td> | I<\/td> | Amplifier 1 inverting input; 45nA bias current<\/td><\/tr> | ||||||||||||||||||||||||||
| 3<\/td> | 1IN+<\/td> | I<\/td> | Amplifier 1 non-inverting input; CM range includes ground<\/td><\/tr> | ||||||||||||||||||||||||||
| 4<\/td> | VCC+<\/td> | P<\/td> | Positive supply; 3V to 30V; bypass with 0.1\u00b5F<\/td><\/tr> | ||||||||||||||||||||||||||
| 5<\/td> | 2IN+<\/td> | I<\/td> | Amplifier 2 non-inverting input<\/td><\/tr> | ||||||||||||||||||||||||||
| 6<\/td> | 2IN-<\/td> | I<\/td> | Amplifier 2 inverting input<\/td><\/tr> | ||||||||||||||||||||||||||
| 7<\/td> | 2OUT<\/td> | O<\/td> | Amplifier 2 output<\/td><\/tr> | ||||||||||||||||||||||||||
| 8<\/td> | 3OUT<\/td> | O<\/td> | Amplifier 3 output<\/td><\/tr> | ||||||||||||||||||||||||||
| 9<\/td> | 3IN-<\/td> | I<\/td> | Amplifier 3 inverting input<\/td><\/tr> | ||||||||||||||||||||||||||
| 10<\/td> | 3IN+<\/td> | I<\/td> | Amplifier 3 non-inverting input<\/td><\/tr> | ||||||||||||||||||||||||||
| 11<\/td> | GND\/VCC-<\/td> | G<\/td> | Ground \/ negative supply<\/td><\/tr> | ||||||||||||||||||||||||||
| 12<\/td> | 4IN+<\/td> | I<\/td> | Amplifier 4 non-inverting input<\/td><\/tr> | ||||||||||||||||||||||||||
| 13<\/td> | 4IN-<\/td> | I<\/td> | Amplifier 4 inverting input<\/td><\/tr> | ||||||||||||||||||||||||||
| 14<\/td> | 4OUT<\/td> | O<\/td> | Amplifier 4 output<\/td><\/tr><\/tbody><\/table>","application_scenarios":"
|