The TLC2252CD is a dual rail-to-rail output micropower operational amplifier from Texas Instruments in an SOIC-8 package. Built on Advanced LinCMOS process, it features 35 \u00b5A\/channel supply current, 200 kHz GBW, 0.12 V\/\u00b5s slew rate, input bias current of 1 pA typical, and 19 nV\/\u221aHz input noise at 1 kHz. The input common-mode range includes the negative rail and the output swings to both supply rails, maximizing dynamic range in single-supply applications. Supply range: 4.4V-16V (single) or \u00b12.2V to \u00b18V (dual). Commercial temperature range: 0\u00b0C to +70\u00b0C. Offset voltage: 1.5 mV max (850 \u00b5V for A-grade). Ideal for battery-powered instrumentation, high-impedance sensor conditioning, and ADC buffering.<\/p>","protected":false},"excerpt":{"rendered":"
The TLC2252CD is a dual rail-to-rail output micropower operational amplifier from Texas Instruments in an SOIC-8 package. Built on Advanced LinCMOS process, it features 35 \u00b5A\/channel supply current, 200 kHz GBW, 0.12 V\/\u00b5s slew rate, input bias current of 1 pA typical, and 19 nV\/\u221aHz input noise at 1 kHz. The input common-mode range includes […]<\/p>\n","protected":false},"author":2,"featured_media":1883,"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-1826","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 rail-to-rail output micropower op-amp, Advanced LinCMOS, 4.4-16V, SOIC-8, 35\u00b5A\/ch","date_code":"","package_case":"SOIC-8 (4.9 x 3.9 mm)","in_stock":300,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/tlc2252a.pdf","price":"$1.06 (75+ pcs)","product_introduction":"The TLC2252CD is a dual rail-to-rail output very low-power operational amplifier from Texas Instruments, built on the Advanced LinCMOS process. It is part of the TLC225x family, which includes the TLC2252 (dual) and TLC2254 (quad) variants. The device is fully characterized at both 5V and \u00b15V supply voltages and optimized for low-voltage, battery-powered applications.\n\nThe TLC2252 features rail-to-rail output swing that includes both supply rails, maximizing dynamic range in single-supply or split-supply configurations. The common-mode input voltage range extends to the negative rail (V-), enabling direct ground-referenced sensing in single-supply systems. Each channel consumes only 35 \u00b5A of supply current (typical), making it one of the lowest-power dual op-amps available in its class.\n\nKey specifications include a gain-bandwidth product of 200 kHz, a slew rate of 0.12 V\/\u00b5s, input offset voltage of 1.5 mV max (850 \u00b5V for the A-grade TLC2252A), input bias current of 1 pA typical (60 pA max), and equivalent input noise of 19 nV\/\u221aHz at 1 kHz. The low input bias current, a characteristic of the CMOS input stage, makes the TLC2252 ideal for high-impedance signal conditioning from sources such as piezoelectric transducers, photodiodes, and pH probes.\n\nThe CD suffix denotes the SOIC-8 plastic surface-mount package rated for the commercial temperature range of 0\u00b0C to +70\u00b0C. The D package code refers to the standard 8-pin SOIC (Small Outline Integrated Circuit) with gull-wing leads. The tube packaging option is standard for this variant. The TLC2252CD supports both single-supply (4.4V to 16V) and dual-supply (\u00b12.2V to \u00b18V) operation, providing flexibility across a wide range of analog signal conditioning applications.\n\nCompared to earlier generation micropower CMOS op-amps such as the TLC27L2 or TS27L2, the TLC2252 offers significantly improved noise performance (19 nV\/\u221aHz vs typical >50 nV\/\u221aHz), rail-to-rail output for increased dynamic range, and lower input offset voltage. For precision applications requiring tighter offset, the TLC2252A variant offers 850 \u00b5V max offset at 25\u00b0C.","working_principle":"The TLC2252CD operates as a dual-channel CMOS operational amplifier using Texas Instruments Advanced LinCMOS process, combining micropower consumption with rail-to-rail output capability.\n\nCMOS Input Stage: The input stage uses a differential pair of P-channel MOSFETs, providing extremely high input impedance (typically 10^12 \u03a9) and very low input bias current (1 pA typical). This CMOS input architecture eliminates the input bias current errors that plague bipolar op-amps in high-impedance circuits. The input common-mode voltage range extends from the negative rail (V-) to approximately 1.2V below the positive rail (V+), enabling ground-referenced operation in single-supply applications. The input offset voltage is laser-trimmed to 850 \u00b5V max (A-grade) or 1.5 mV max (standard grade) at 25\u00b0C.\n\nRail-to-Rail Output Stage: The output stage uses a complementary CMOS push-pull configuration with both P-channel and N-channel output transistors. This architecture allows the output to swing to within millivolts of both supply rails under light load conditions (typically 10 mV from V- and 60 mV from V+ with 100 k\u03a9 load). The rail-to-rail output maximizes the usable signal range in single-supply applications, which is critical when interfacing with ADCs where even a few hundred millivolts of lost dynamic range can significantly reduce resolution.\n\nMicropower Operation: The TLC2252 achieves its very low supply current (35 \u00b5A per channel, 80 \u00b5A total for dual) through careful biasing of the internal gain stages at very low quiescent current levels. This micropower design makes the device ideal for battery-powered applications where supply current must be minimized. The trade-off for low power is reduced bandwidth (200 kHz GBW) and slew rate (0.12 V\/\u00b5s), which are adequate for DC and low-frequency signal conditioning.\n\nGain-Bandwidth Product: The 200 kHz gain-bandwidth product defines the frequency at which the open-loop gain drops to unity (0 dB). For a closed-loop gain of 10 (20 dB), the bandwidth is approximately 20 kHz; for a gain of 100 (40 dB), approximately 2 kHz. The TLC2252 is therefore best suited for DC and low-frequency applications such as sensor signal conditioning, transducer amplification, and active filtering below audio frequencies.\n\nSlew Rate: The 0.12 V\/\u00b5s slew rate limits the maximum output swing at high frequencies. For a full-scale sine wave output, the maximum frequency before slew-rate limiting is f_max = SR \/ (2\u03c0 \u00d7 Vp), where Vp is the peak output voltage. For a 5V peak-to-peak output (Vp = 2.5V), the maximum frequency is approximately 7.6 kHz. This is consistent with the device target application space of DC and low-frequency signal conditioning.\n\nNoise Performance: The TLC2252 achieves 19 nV\/\u221aHz input-referred voltage noise at 1 kHz, which is approximately four times lower than competing micropower CMOS op-amps. This improvement is achieved through optimized input transistor sizing and bias current distribution. The low noise, combined with the high input impedance, makes the device excellent for amplifying small signals from high-impedance sources such as piezoelectric sensors and photodiodes without significant noise degradation.","pin_description":"
| Pin<\/th> | Name<\/th> | Type<\/th> | Default Function<\/th> | Description<\/th><\/tr><\/thead> | ||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1<\/td> | 1OUT<\/td> | O<\/td> | Channel 1 Output<\/td> | Output of amplifier channel 1; rail-to-rail swing<\/td><\/tr> | ||||||||||||||||||||||||||||||||||||
| 2<\/td> | 1IN-<\/td> | I<\/td> | Channel 1 Inverting Input<\/td> | Inverting input of amplifier channel 1; high-impedance CMOS input<\/td><\/tr> | ||||||||||||||||||||||||||||||||||||
| 3<\/td> | 1IN+<\/td> | I<\/td> | Channel 1 Non-Inverting Input<\/td> | Non-inverting input of amplifier channel 1; common-mode range includes V-<\/td><\/tr> | ||||||||||||||||||||||||||||||||||||
| 4<\/td> | V-<\/td> | P<\/td> | Negative Supply \/ GND<\/td> | Negative power supply (dual supply) or ground (single supply); 0V in single-supply config<\/td><\/tr> | ||||||||||||||||||||||||||||||||||||
| 5<\/td> | 2IN+<\/td> | I<\/td> | Channel 2 Non-Inverting Input<\/td> | Non-inverting input of amplifier channel 2<\/td><\/tr> | ||||||||||||||||||||||||||||||||||||
| 6<\/td> | 2IN-<\/td> | I<\/td> | Channel 2 Inverting Input<\/td> | Inverting input of amplifier channel 2<\/td><\/tr> | ||||||||||||||||||||||||||||||||||||
| 7<\/td> | 2OUT<\/td> | O<\/td> | Channel 2 Output<\/td> | Output of amplifier channel 2; rail-to-rail swing<\/td><\/tr> | ||||||||||||||||||||||||||||||||||||
| 8<\/td> | V+<\/td> | P<\/td> | Positive Supply<\/td> | Positive power supply; 4.4V to 16V single supply or up to \u00b18V dual supply<\/td><\/tr><\/tbody><\/table>","application_scenarios":"
|