TLC272CD - Dual 16V 2MHz CMOS Op-Amp | Texas Instruments
부품 번호: TLC272CD ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $0.62 | $0.62 |
| 10 | $0.52 | $5.20 |
| 100 | $0.41 | $41.00 |
| 500 | $0.35 | $175.00 |
| 1,000 | $0.29 | $290.00 |
TLC272CD 개요
An operational amplifier (op-amp) is a high-gain voltage amplifier with differential inputs and a single-ended output, the foundational building block of the analog signal chain within the broader amplifier IC and power-management/signal-conditioning hierarchy. Single-supply CMOS op-amps such as the TLC272 family are optimized to operate directly from common logic and battery rails, where the input range must include ground (V-).
Key features include a wide supply range over the specified temperature range (16 V single-supply operation), input offset voltage drift of typically 0.1 uV/month including the first 30 days, and very low input bias current due to the CMOS input stage, which yields very low noise current that is insignificant in most applications. The LinCMOS process provides excellent long-term offset stability without the input-current penalties of bipolar designs.
Technically, the silicon-gate LinCMOS architecture keeps first-stage differential-pair current low; per the TLC27xx datasheet, noise performance in op-amp circuits depends strongly on this first-stage current, and the TLC272's low bias-current requirement results in minimal noise current. Speeds approach those of general-purpose BiFET amplifiers while retaining the input impedance advantages of CMOS.
Typical applications include sensor signal conditioning and transducer interfaces (high-impedance inputs preserve signals from piezo and photodiode sources), active filters and integrators in battery-powered instrumentation, and general-purpose single-supply amplification in industrial and consumer control boards.
Design consideration: as with any CMOS input, use appropriate input protection against electrostatic discharge and avoid letting inputs exceed the supply rails; the 2 MHz bandwidth means closed-loop gains above about 20 with adequate phase margin for stable, low-gain-error operation.
This page synthesizes distributor availability data, verified drop-in alternatives within the TLC27xx family, and practical design notes beyond the headline specifications found in the manufacturer datasheet.
드롭인 대체품: TLC272CD — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: TLC272CD (동일 폼 팩터 및 풋프린트) — 차이점: Input Common-Mode Range, Input Offset Voltage Drift, Package, Technology.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
TLC272ACD
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
TLC272BCD
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
TLC272ID
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
TLC277CD
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
TLC272CDR
✅ 드롭인✓ 재고 있음
$0.19 / 개
데이터시트 보기 →TLC272CD 최대 정격 & 전기적 특성
| Amplifier Channels | 2 (Dual) |
| Gain-Bandwidth Product | 2 MHz |
| Supply Voltage (Max, Single Supply) | 16 V |
| Supply Type | Single or Dual Supply |
| Input Common-Mode Range | In to V- (extends to negative rail) |
| Input Offset Voltage Drift | Typically 0.1 uV/month (including first 30 days) |
| Input Noise Current | Very low (insignificant in most applications, per datasheet) |
| Technology | TI LinCMOS silicon-gate CMOS |
| 패키지 | 8-SOIC |
| 실장 유형 | Surface Mount |
| Category Classification | Precision Dual Operational Amplifier / CMOS Amplifier, 2 Circuit |
| RoHS 상태 | Compliant |
TLC272CD 핀 구성
| 핀 1 | OUT A — Output of amplifier A |
| 핀 2 | IN A- — Inverting input of amplifier A |
| 핀 3 | IN A+ — Non-inverting input of amplifier A |
| 핀 4 | V- — Negative supply / ground in single-supply operation |
| 핀 5 | IN B+ — Non-inverting input of amplifier B |
| 핀 6 | IN B- — Inverting input of amplifier B |
| 핀 7 | OUT B — Output of amplifier B |
| 핀 8 | V+ — Positive supply (up to 16 V single supply) |
일반적인 애플리케이션
TLC272CD 적합 용도: 6 애플리케이션s: Sensor Signal Conditioning, Battery-Powered Portable Instrumentation, Active Filters and Integrators, Industrial Process Control Signal Chains, Consumer Audio Preamplification, Photodiode and Transimpedance Amplification.
Sensor Signal Conditioning
The TLC272CD excels in high-impedance sensor interfaces because its LinCMOS input stage draws very low input bias current, so it does not load delicate signal sources. Piezoelectric, photodiode, and pH-probe outputs remain intact across the full input common-mode range that extends to V-, enabling direct ground-referenced amplification from a single 5 V rail. With a 2 MHz gain-bandwidth product, one channel can amplify while the second implements a 2nd-order low-pass anti-alias filter, completing the analog front end in a single 8-SOIC package. Typical offset drift of 0.1 uV/month keeps calibration stable over product lifetime, reducing maintenance in deployed instrumentation.
추천
Battery-Powered Portable Instrumentation
In battery-operated multimeters, data loggers, and handheld testers, every microamp matters. The TLC272CD's CMOS architecture provides very low input bias current and modest supply current per channel, extending battery life relative to bipolar-input op-amps. Its ability to run at 16 V maximum single-supply means it works directly from 3 V, 5 V, or 9 V batteries, and the input range reaching V- allows ground-referenced signals to be processed without a negative rail or charge pump. The dual channels let designers pair a gain stage with an active filter or comparator-adjacent buffer, saving board space. Its 8-SOIC footprint and surface-mount assembly keep portable product layouts compact and inexpensive.
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Active Filters and Integrators
Active low-pass, band-pass, and Sallen-Key filters built with the TLC272CD benefit from its 2 MHz gain-bandwidth product, which keeps gain error and phase shift low at audio and instrumentation frequencies. For example, a 10 kHz Sallen-Key low-pass at unity gain consumes only 1% of the available bandwidth, preserving filter Q accuracy. CMOS inputs contribute negligible bias-current-induced offset in the high-value resistors typical of low-power filter designs, and the noise current is insignificant per the TI datasheet. The dual-channel package supports cascaded filter sections or a filter-plus-buffer combination on one IC, simplifying BOM management in industrial control boards.
추천
Industrial Process Control Signal Chains
On industrial control boards, 4-20 mA receiver circuits and transducer buffers require amplifiers that tolerate wide supply conditions; the TLC272CD operates up to 16 V single-supply over its specified temperature range, accommodating common 12 V and 15 V industrial rails. Its input common-mode range extending to V- allows near-ground signals from transducers to be scaled directly, and typical 0.1 uV/month offset drift maintains loop accuracy between calibration cycles. The dual op-amp arrangement maps naturally to the signal-scaling stage plus output-driving stage of a transmitter front end. The LinCMOS process provides stable long-term behavior important for equipment with long field-service intervals in factory automation environments.
추천
Consumer Audio Preamplification
Cost-sensitive consumer audio products - preamplifier stages, tone controls, and active crossovers - can use the TLC272CD's two channels in one 8-SOIC package. At audio-band closed-loop gains, the 2 MHz bandwidth provides ample loop gain for low distortion, and the TI datasheet notes the very low noise current that results from the low first-stage current, keeping hiss contributions minimal in high-impedance volume-network contexts. Single-supply operation from 9 V or 12 V adapters with inputs biased to mid-rail eliminates the need for split rails. For premium designs demanding lower voltage noise, the same-footprint TLC277CD offers an upgrade path without PCB redesign.
추천
Photodiode and Transimpedance Amplification
Transimpedance amplifiers convert photodiode current to voltage, and their accuracy depends critically on amplifier input bias current - any bias current flows through the feedback resistor and appears as output offset. With the TLC272CD's very low CMOS input bias current, a 1 MOhm feedback resistor contributes negligible current-induced error, making the part attractive for ambient-light sensors, optical encoders, and pulse-oximetry front ends operating at moderate bandwidths. The second amplifier channel serves as a second gain stage or a filtered reference for the photodiode bias node. Its 2 MHz bandwidth supports megohm-range feedback at kilohertz signal bandwidths typical of optical sensing applications.
추천
추천 제품 요약
엔지니어링 참조 데이터: TLC272CD — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | TLC272ACD | TLC272BCD | TLC272ID | TLC277CD |
|---|---|---|---|---|---|
| Package | 8-SOIC | 8-SOIC - same | 8-SOIC - same | 8-SOIC - same | 8-SOIC - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Gain-Bandwidth Product | 2 MHz | 2 MHz | 2 MHz | 2 MHz | 2 MHz (family rating) |
| Max Supply Voltage | 16 V | 16 V | 16 V | 16 V | 16 V |
| Input Offset Voltage Grade | C grade | A grade (wider) | B grade (tighter) | C grade (temp grade differs) | Precision grade (tighter) |
| Temperature Grade | C (commercial) | C (commercial) | C (commercial) | I (industrial) | C (commercial) |
| Offset Drift | Typ. 0.1 uV/month | Typ. 0.1 uV/month | Typ. 0.1 uV/month | Typ. 0.1 uV/month | Comparable family drift |
| Input Common-Mode Range | In to V- | In to V- | In to V- | In to V- | In to V- |
주요 차별점
- Low input bias current from LinCMOS input stage (vs TLC277CD)
- Cost advantage within the same footprint (vs TLC272BCD)
- Commercial-grade pricing with industrial upgrade path (vs TLC272ID)
설계 노트
Bypass the V+ pin (pin 8) with a 100 nF ceramic capacitor placed within a few millimeters of the pin, plus a bulk 1 uF to 10 uF capacitor per board. Although a CMOS op-amp draws low quiescent current, the 2 MHz output stage can draw transient current when driving capacitive loads; inadequate local decoupling shows up as interchannel coupling between amplifiers A and B sharing the same die. In single-supply designs, establish a clean mid-rail reference with a buffered divider - use one TLC272CD channel as the reference buffer and the other as the signal amplifier.
Keep the feedback path around each amplifier short and route the inverting-input traces away from output traces to prevent parasitic coupling and potential instability at high closed-loop gains. Use a solid ground plane on layer 2 of the PCB and return each amplifier's load current directly to the supply rail rather than through sensitive input traces. For high-impedance inputs (photodiode, piezo), guard-ring the input traces with a conductor driven at the input potential to minimize leakage-induced offset from PCB contamination.
Do not exceed the 16 V absolute supply limit or allow inputs to go below V- or above the input common-mode range - CMOS inputs without external protection can be damaged and can induce phase inversion when the common-mode range is violated. Add series resistors (1 kOhm to 10 kOhm) on inputs connected to external connectors for ESD and fault protection. Verify the offset grade you ordered: the C grade of TLC272CD has a wider offset limit than B grade - designs specified around TLC272BCD offset must not be silently substituted with C grade without reviewing DC error budgets.
규정 준수 정보
RoHS compliant per TI product listing; lead-free surface-mount SOIC. Verify REACH and halogen-free status on the official TI product page for the current shipping revision.
