TLC272CDR - Dual 16V CMOS Op-Amp 2MHz SOIC-8 | Texas Instruments
MPN: TLC272CDR ✓ نشطTLC272CDR نظرة عامة
An operational amplifier (op-amp) is a high-gain voltage amplifier with differential inputs, forming the foundational building block of the analog signal chain within the broader hierarchy of amplifier ICs, linear ICs, and semiconductors. Rail-to-rail style input flexibility on single-supply parts like the TLC272 lets designers amplify sensor signals that swing near ground without a negative supply, dramatically simplifying battery-powered and industrial designs.
Key features include a maximum input offset voltage of 500 uV at 25 C with VDD = 5 V, extremely low offset drift of typically 0.1 uV/month (including the first 30 days), very high input impedance with low bias currents inherent to CMOS inputs, and a common-mode input range that extends to the negative rail (In to V-). These characteristics make it a cost-effective alternative to BiFET general-purpose amplifiers.
The LinCMOS process provides input bias currents in the picoampere range, enabling direct interfacing with high-impedance sources such as pH probes, photodiodes, and piezoelectric sensors without external buffering. The dual amplifier in one SOIC-8 saves board area and improves channel matching in filter and instrumentation circuits.
Typical applications include sensor signal conditioning, active filters, battery-powered portable instrumentation, and low-frequency data-acquisition front ends where single-supply, low-bias-current operation is required.
Design consideration: keep source impedances moderate and use adequate supply bypassing; the CMOS input is sensitive to static, so observe ESD handling precautions.
This page synthesizes distributor pricing, drop-in alternatives, pinout data, and practical design notes not found in the manufacturer datasheet.
بدائل مباشرة لـ TLC272CDR — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع TLC272CDR (نفس عامل الشكل والبصمة) — يختلف في Input Common-Mode Range, Input Offset Voltage Drift, Package, Technology.
TLC272BCDR
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
TLC272BCDRG4
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
TLC272CDG4
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
TLC272ACDR
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
TLC277CDR
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
TLC2272CDR
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
TLC272CDR الحدود القصوى والخصائص الكهربائية
| Amplifier Channels | 2 (Dual) |
| Supply Voltage Range | 3 V to 16 V (single supply) |
| Gain Bandwidth Product | 2.2 MHz (typ) |
| Slew Rate | 3.6 V/us |
| Input Offset Voltage (max) | 500 uV at 25 C, VDD = 5 V |
| Input Offset Voltage Drift | Typically 0.1 uV/month |
| Input Bias Current | Low (CMOS, picoampere-class) |
| Input Common-Mode Range | Extends to negative rail (In to V-) |
| Technology | Silicon-gate LinCMOS |
| العلبة | SOIC-8 (PDSO8), 8 pins |
| نوع التركيب | Surface Mount |
| نطاق درجة حرارة التشغيل | 0 C to 70 C (C grade) |
| Reel Packaging | Tape and Reel (R suffix) |
| حالة RoHS | Compliant |
تكوين أطراف TLC272CDR
| دبوس 1 | OUT A — Output of amplifier A |
| دبوس 2 | IN A- — Inverting input of amplifier A |
| دبوس 3 | IN A+ — Non-inverting input of amplifier A |
| دبوس 4 | V- — Negative supply / ground on single supply |
| دبوس 5 | IN B+ — Non-inverting input of amplifier B |
| دبوس 6 | IN B- — Inverting input of amplifier B |
| دبوس 7 | OUT B — Output of amplifier B |
| دبوس 8 | V+ — Positive supply, 3 V to 16 V |
التطبيقات النموذجية
TLC272CDR مناسب لـ 6 التطبيقs: Sensor Signal Conditioning, Battery-Powered Portable Instrumentation, Active Filters, Industrial Signal Transmission (4-20 mA), Photodiode Transimpedance Amplification, Audio Preamp and Mixing (Single Supply).
Sensor Signal Conditioning
The TLC272CDR's CMOS inputs with picoampere-class bias current and very high input impedance let it amplify signals from high-impedance sensors such as pH electrodes, photodiodes, and piezoelectric elements without loading the source. Its common-mode input range extending to the negative rail means ground-referenced sensor outputs are handled directly on a single 3 V to 16 V supply, eliminating negative rails. Typical circuits are non-inverting amplifiers with gains of 10 to 100 feeding an ADC. The 500 uV maximum offset at VDD = 5 V limits DC error; calibrate or use the B grade when sub-millivolt accuracy is needed.
موصى به
Battery-Powered Portable Instrumentation
With single-supply operation down to 3 V, the TLC272CDR runs from two AA cells or a single lithium cell, simplifying power-tree design in handheld meters and portable data loggers. The dual amplifier in one SOIC-8 halves the amplifier footprint and provides matched channels for differential measurements. CMOS low bias current preserves battery life in high-impedance front ends, and the 2.2 MHz bandwidth comfortably covers instrumentation signal bands below 100 kHz. Designers should verify quiescent current against the battery budget and bypass V+ with 100 nF plus 10 uF for stability across the battery's discharge voltage range.
موصى به
Active Filters
The 2.2 MHz gain-bandwidth product and 3.6 V/us slew rate of the TLC272CDR support Sallen-Key and multiple-feedback active filters for audio, telemetry, and anti-aliasing duty below roughly 100 kHz with adequate loop gain margin. Its high CMOS input impedance makes topology component selection independent of amplifier loading, and channel matching inside the dual package keeps cutoff frequencies consistent between stereo or quadrature paths. Single-supply biasing at mid-rail is straightforward because inputs operate down to V-. Use the second channel as a buffer after the filter to preserve frequency response into ADC or cable loads.
موصى به
Industrial Signal Transmission (4-20 mA)
In 24 V industrial environments the TLC272CDR tolerates 16 V rails (and can be powered from regulated lower rails derived from the loop), amplifying strain-gauge and pressure-sensor outputs before voltage-to-current conversion. Input offset drift of typically 0.1 uV/month keeps transmitter zero-point stable between calibrations, which matters for loop-powered transmitters serviced annually. The common-mode range to V- suits ground-referenced bridge outputs. For 24 V direct connection, add input protection and use a higher-voltage regulator stage. Verify the 0 C to 70 C C-grade range against the enclosure environment; use I-grade suffixes for harsher cabinets.
موصى به
Photodiode Transimpedance Amplification
Picoampere-class input bias current makes the TLC272CDR a cost-effective transimpedance amplifier for light sensing, smoke detection, and IR receiver circuits. Feedback resistors of 1 Mohm to 10 Mohm are practical because amplifier input current contributes negligible offset compared with the 500 uV input spec. The 2.2 MHz bandwidth supports megohm TIA gain with photodiode capacitance in the tens of picofarads at moderate bandwidths; use the second channel for a second-stage gain or an active low-pass filter to set the noise bandwidth. Add a small feedback capacitor for stability and keep the summing node guard ringed on the PCB.
موصى به
Audio Preamp and Mixing (Single Supply)
The TLC272CDR provides low-cost single-supply audio gain stages for consumer and industrial audio: microphone preamps, line mixing, and active tone controls biased at mid-rail. Its input range to V- allows AC-coupled signals centered on the bias point without distortion near ground, and the 2.2 MHz bandwidth maintains flat response through 20 kHz with generous gain margin. CMOS operation from 3 V to 16 V covers battery and wall-adapter products with one BOM. For low-noise professional applications evaluate the input voltage noise in the datasheet against source impedance; for cost-driven consumer audio the TLC272 is a proven choice.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ TLC272CDR — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | TLC272BCDR | TLC272BCDRG4 | TLC272CDG4 | TLC272ACDR | TLC277CDR | TLC2272CDR |
|---|---|---|---|---|---|---|---|
| Package | SOIC-8 | SOIC-8 - same | SOIC-8 - same | SOIC-8 - same | SOIC-8 - same | SOIC-8 - same | SOIC-8 - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Supply Voltage Range | 3 V to 16 V | 3 V to 16 V | 3 V to 16 V | 3 V to 16 V | 3 V to 16 V | 3 V to 16 V | 4.4 V to 16 V |
| Output Rail-to-Rail | No (standard output swing) | No | No | No | No | No | Yes (rail-to-rail output) |
| Operating Temperature (C grade) | 0 C to 70 C | 0 C to 70 C | 0 C to 70 C | 0 C to 70 C | 0 C to 70 C | 0 C to 70 C | 0 C to 70 C |
أبرز الفروقات
- Cost-effective precision grade with ultra-low offset drift (مقابلTLC2272CDR)
- Upgrade path to tighter offset without PCB change (مقابلTLC272BCDR)
- Wider low-end supply range than rail-to-rail alternative (مقابلTLC2272CDR)
ملاحظات التصميم
Bypass V+ (pin 8) with a 100 nF ceramic capacitor placed within 5 mm of the pin, plus a 10 uF bulk capacitor per board section. On single-supply circuits, create a mid-rail bias with a resistor divider buffered by the spare amplifier channel, and decouple that bias node with at least 1 uF so it presents a low impedance to both channels' signals. Keep the inverting-node summing junction traces short in transimpedance and filter circuits to limit stray capacitance.
Do not assume rail-to-rail output: the TLC272 output swings close to V- but has limited headroom near V+, so design full-scale signals to stop below the positive-rail clamp region or the output will clip asymmetrically. Also, the C grade is specified only from 0 C to 70 C - using it in outdoor or automotive enclosures requires an I-grade suffix part. CMOS inputs must never be driven beyond the rails even transiently; add series resistors on external connectors.
With picoampere bias currents, source impedances up to several megohms are acceptable, but high-impedance nodes need guarding: ring the summing node with a trace driven at the guard potential to prevent PCB leakage currents exceeding the input current. In high-gain stages, layout the feedback resistor close to the pins and consider a small feedback capacitor (1-3 pF) to control peaking with source capacitance.
معلومات الامتثال
RoHS compliant per TI product page and distributor listings for the R-suffix tape-and-reel part. Not an automotive AEC-Q100 part. REACH and conflict-minerals status not stated in provided data.
