The LM358P from Texas Instruments is a dual general-purpose operational amplifier in an 8-pin PDIP (through-hole) package. It contains two independent high-gain internally compensated op-amps designed for single-supply operation from 3 V to 30 V (or \u00b11.5 V to \u00b115 V). Key specs include 1.1-MHz gain bandwidth product, 0.5-V\/\u00b5s slew rate, 2-mV typical input offset voltage, 45-nA input bias 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. Quiescent current is 500 \u00b5A per amplifier. Output current capability is 40 mA typical at VCC=15V. Operating temperature range is 0\u00b0C to +70\u00b0C. The ‘P’ suffix denotes the plastic DIP-8 through-hole package.<\/p>","protected":false},"excerpt":{"rendered":"
The LM358P from Texas Instruments is a dual general-purpose operational amplifier in an 8-pin PDIP (through-hole) package. It contains two independent high-gain internally compensated op-amps designed for single-supply operation from 3 V to 30 V (or \u00b11.5 V to \u00b115 V). Key specs include 1.1-MHz gain bandwidth product, 0.5-V\/\u00b5s slew rate, 2-mV typical input offset […]<\/p>\n","protected":false},"author":2,"featured_media":2882,"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-2050","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":"Dual op-amp, 3-30V single supply, 1.1MHz GBW, 2mV Vos, ground-sensing input, PDIP-8, 0~70\u00b0C","date_code":"","package_case":"PDIP-8 (P) (9.81 x 6.35 x 4.57 mm, 2.54mm pitch, through-hole)","in_stock":4595,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/lm358.pdf","price":"$0.36 (1K+ pcs)","product_introduction":"The LM358P from Texas Instruments is the through-hole PDIP-8 version of the LM358, one of the most widely used dual operational amplifiers in the electronics industry. First introduced in the 1970s, the LM358 family remains in high-volume production due to its simplicity, low cost, wide availability, and single-supply capability. The 'P' suffix specifically denotes the plastic DIP-8 package for through-hole mounting, favored in prototyping, education, and industrial applications requiring manual soldering or socket installation.\n\nThe LM358 contains two independent op-amps sharing common VCC and GND pins. Each amplifier features internal dominant-pole compensation for unity-gain stability, eliminating the need for external compensation components. The input common-mode voltage range includes ground (0 V), which is the defining feature that distinguishes the LM358 from older dual-supply op-amps like the LM741. This allows the LM358 to directly amplify signals near ground without a negative supply rail.\n\nThe output swings from approximately 5 mV above ground (no load) to VCC - 1.5 V. The output can source 40 mA and sink approximately 20 mA at VCC = 15 V, sufficient for driving LEDs, small relays, and logic-level signals. The 500-\u00b5A per-amplifier quiescent current is modest for bipolar op-amps and is essentially independent of supply voltage.\n\nThe LM358P is electrically identical to the LM358N (ON Semiconductor's PDIP-8 version) and LM358PT (ST's PDIP-8 version). These parts are fully interchangeable in most applications. TI also offers the LM358B (3-36 V, 3-mV Vos, EMI filtering, 1.2-MHz GBW) as a drop-in upgrade for new designs.\n\nThe LM358 is the dual-channel companion to the LM324 quad op-amp. The two devices share identical amplifier cells and specifications, differing only in channel count and package. Designers needing only two amplifiers should use the LM358 to save board space; those needing four should use the LM324.","working_principle":"**Bipolar Input Stage:** Each LM358 amplifier uses a PNP differential pair (Q1-Q4 in the TI schematic) with a current-mirror load. The PNP inputs allow the common-mode range to include ground and extend -0.3 V below it. The 45-nA typical input bias current is the PNP base current flowing out of the input pins. The bias current creates a voltage error across source resistances; matching the DC resistance seen by both inputs minimizes this error.\n\n**Internal Compensation:** A 30-pF internal capacitor provides dominant-pole compensation, setting the unity-gain crossover frequency to approximately 1.1 MHz and the slew rate to 0.5 V\/\u00b5s. The compensation ensures stability with 100% feedback (unity-gain voltage follower) without external components. The relatively low slew rate limits full-power bandwidth to approximately 10 kHz for large signals.\n\n**Class-AB Output with Current Sink:** The output stage can source 40 mA (via a Darlington pull-up) and sink 20 mA (via a current-sink transistor). The asymmetric drive capability means the output cannot truly swing to ground under load \u2014 it typically sits at 5-20 mV with no pull-down resistor, and rises to hundreds of millivolts when sinking more than a few \u00b5A. A pull-down resistor (10-100 k\u03a9) from output to ground helps the output reach near-zero volts in DC applications.\n\n**Single-Supply Design:** The VCC- pin (pin 4) serves as both the ground reference and the return path for the output sink current. No negative supply is required, though split-supply operation (\u00b11.5 V to \u00b115 V) is also supported by connecting VCC- to the negative rail.","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; 40mA source, 20mA sink capability<\/td><\/tr> | ||||||||||||||||||||||||||||
| 2<\/td> | 1IN-<\/td> | I<\/td> | Amplifier 1 inverting input; 45nA bias current flows out of pin; differential input range up to VCC<\/td><\/tr> | ||||||||||||||||||||||||||||
| 3<\/td> | 1IN+<\/td> | I<\/td> | Amplifier 1 non-inverting input; common-mode range includes ground (0V to VCC-1.5V)<\/td><\/tr> | ||||||||||||||||||||||||||||
| 4<\/td> | GND\/VCC-<\/td> | G<\/td> | Ground \/ negative supply; connect to ground for single-supply; connect to -V for split-supply operation<\/td><\/tr> | ||||||||||||||||||||||||||||
| 5<\/td> | 2IN+<\/td> | I<\/td> | Amplifier 2 non-inverting input; same characteristics as 1IN+<\/td><\/tr> | ||||||||||||||||||||||||||||
| 6<\/td> | 2IN-<\/td> | I<\/td> | Amplifier 2 inverting input; same characteristics as 1IN-<\/td><\/tr> | ||||||||||||||||||||||||||||
| 7<\/td> | 2OUT<\/td> | O<\/td> | Amplifier 2 output; same characteristics as 1OUT<\/td><\/tr> | ||||||||||||||||||||||||||||
| 8<\/td> | VCC+<\/td> | P<\/td> | Positive supply; 3V to 30V; bypass with 0.1\u00b5F ceramic to GND; supply current 500\u00b5A per amplifier typical<\/td><\/tr><\/tbody><\/table>","application_scenarios":"
|