LM2900N - Quad 2.5MHz Norton Operational Amplifier | TI
부품 번호: LM2900N ✓ 활성LM2900N 개요
An operational amplifier is an analog signal-conditioning IC that uses high open-loop gain to amplify the difference between two input voltages. The LM2900 belongs to the Norton-operational-amplifier family, characterized by current-feedback-style input stages. Within the broader electronics hierarchy, it is an analog amplifier IC, then an operational amplifier, then a general-purpose quad amplifier.
The LM2900 provides four independent amplifiers, wide bandwidth, large output-voltage swing, short-circuit protection, internal frequency compensation, and low input-bias current. Internal compensation removes the need for external compensation components in ordinary closed-loop operation, simplifying analog boards that need several amplified signals on one supply rail.
Its specified 4.5 V to 32 V single-supply range makes it applicable to legacy industrial control, instrumentation, sensor interfaces, audio, and communications equipment. The 20 V/µs slew rate supports faster edge rates than many general-purpose amplifier selections, while the 2.5 MHz bandwidth gives useful signal bandwidth for audio and control applications. The DIP package also supports through-hole assembly and socketed prototypes.
When designing around the LM2900N, verify input and output common-mode limits at the selected supply voltage. Account for the input-bias current when driving high-impedance sensors, and use stable feedback networks with resistive isolation where required by the source impedance. The device uses four independent amplifiers, but shared-package power and ground connections still require careful layout.
This product record combines the verified Texas Instruments family description, distributor package information, ordering details, and cross-reference findings. It also distinguishes electrically similar ordering variants from verified pin-compatible replacements and identifies application guidance that is not presented as a manufacturer reference design.
드롭인 대체품: LM2900N — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
LM2900NE4
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
LM2900N 최대 정격 & 전기적 특성
| Amplifier Count | 4 independent amplifiers |
| Product Type | Quad high-gain frequency-compensated Norton operational amplifier |
| Gain-Bandwidth Product | 2.5 MHz |
| Slew Rate | 20 V/µs |
| Single-Supply Voltage Range | 4.5 V to 32 V |
| Dual-Supply Voltage Range | ±2.2 V to ±16 V |
| 패키지 | 14-PDIP |
| Total Pin Count | 14 pins |
| Frequency Compensation | Internal |
| Short-Circuit Protection | Yes |
| Output Voltage Swing | Large output voltage swing |
| Input Bias Current | Low input bias current |
| 실장 유형 | Through-hole |
LM2900N 14-pdip 핀 구성 가이드
LM2900N(14-pdip 패키지)의 핀 구성입니다. 이 아날로그 부품에는 입력, 출력, 전원 공급 핀이 있습니다. 오프셋 널, 보상, 인에이블 핀 구성은 제조사 데이터시트를 참조하십시오. 신호 컨디셔닝 및 증폭기 회로에 이상적입니다.
다음에 대한 상세 핀아웃 데이터 없음: LM2900N.
다음을 참조하십시오: 데이터시트 전체 핀 구성은 다음을 참조하십시오.
일반적인 애플리케이션
LM2900N 적합 용도: 6 애플리케이션s: Industrial Sensor Signal Conditioning, Audio Preamplifier and Mixer, Communications Interface Circuits, Power Supply Control and Monitoring, Portable Test and Measurement Equipment, Feedback and Control Systems.
Industrial Sensor Signal Conditioning
The LM2900N fits general-purpose industrial sensor-conditioning circuits that amplify low-level analog signals before conversion or control. Its four independent amplifiers allow several channels to share one package, while the 2.5 MHz gain-bandwidth product and 20 V/µs slew rate provide useful response for sensors with moderate bandwidth requirements. A 4.5 V to 32 V single-supply range simplifies industrial interfaces operating from higher rails, and dual-supply operation extends the design choice for bipolar sensor outputs. The principal design checks are input common-mode range, input-bias-current error, output swing, and the actual signal bandwidth at the selected closed-loop gain.
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Audio Preamplifier and Mixer
The LM2900N can serve in audio preamplifier, summing, and mixer circuits where four amplifier sections reduce the package count. Its 2.5 MHz gain-bandwidth product covers a substantially wider range than audio-band signals, and the 20 V/µs slew rate helps preserve larger-amplitude transients. A dual supply of ±2.2 V to ±16 V provides headroom for bipolar audio waveforms, while single-supply operation can support coupling into a biased output stage. Designers should evaluate output swing into the selected load, input offset, noise, channel matching, and stability with the feedback network rather than assuming the bandwidth rating alone determines audio quality.
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Communications Interface Circuits
The LM2900N is applicable to line-level communications interfaces that require low-frequency amplification, buffering, or gain stages with limited bandwidth. Four independent amplifiers permit receive and transmit signal-path functions in one through-hole package, and the 4.5 V to 32 V supply range supports systems using nominal 5 V, 12 V, or 24 V rails. The 20 V/µs slew rate can reproduce fast edges, but communications quality also depends on the target bandwidth, distortion, noise, input impedance, and output loading. Confirm common-mode limits and output swing at the actual supply voltage, and place supply bypassing close to the device to limit voltage drops across package traces.
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Power Supply Control and Monitoring
The LM2900N can implement control, error-amplifier, and monitoring functions in general-purpose power-management circuitry. Its four independent amplifiers allow several supervisory loops or threshold amplifiers to share a package, while the wide 4.5 V to 32 V single-supply range accommodates higher-voltage industrial systems. The internal frequency compensation simplifies conventional closed-loop use, and the 20 V/µs slew rate supports loops responding to relatively fast transients. However, stable operation requires compensation suitable for the plant, output saturation must be checked during startup and fault conditions, and the amplifier should remain within its specified common-mode and output-voltage limits.
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Portable Test and Measurement Equipment
The LM2900N is suitable for legacy test and measurement equipment requiring four general-purpose analog amplifier channels in a through-hole package. The four independent sections can support buffer, gain, differential, and auxiliary measurement stages, while internal frequency compensation reduces external component count. Its 2.5 MHz gain-bandwidth product and 20 V/µs slew rate are suitable for many low- and medium-bandwidth instrumentation signals. When designing the input network, account for the amplifier's input-bias current and offset, and verify that source impedance does not degrade accuracy. The PDIP package is particularly convenient for socketed prototypes and hand-assembled laboratory equipment.
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Feedback and Control Systems
The LM2900N can implement multiple amplifier sections in feedback-control, position-control, and analog-regulation systems. Its 2.5 MHz gain-bandwidth product provides loop bandwidth potential, and the 20 V/µs slew rate can support faster actuator commands, while four independent sections simplify mixed-signal board partitioning. The device supports 4.5 V to 32 V single-supply operation for industrial control boards and ±2.2 V to ±16 V dual supplies for bipolar error amplifiers. Stability must be established for each specific feedback network and load, and designers should check phase margin, output saturation, slew-limited settling, and the input common-mode range under all control states.
추천
추천 제품 요약
엔지니어링 참조 데이터: LM2900N — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | LM2900NE4 |
|---|---|---|
| Package | 14-PDIP | 14-PDIP - manufacturer confirmation required |
| Brand | Texas Instruments | Texas Instruments |
| Amplifier Count | 4 independent amplifiers | 4 independent amplifiers |
| Amplifier Architecture | High-gain frequency-compensated Norton operational amplifier | LM2900 family Norton operational amplifier |
| Gain-Bandwidth Product | 2.5 MHz | 2.5 MHz |
| Frequency Compensation | Internal | Internal |
주요 차별점
- Four independently usable Norton amplifiers in one through-hole package (vs LM2900NE4)
- Wide single-supply operating range (vs LM2900NE4)
- Through-hole 14-PDIP implementation (vs LM2900NE4)
설계 노트
Decouple each supply connection with a local ceramic capacitor and place the capacitor close to the device pins. The verified LM2900 family supports 4.5 V to 32 V single-supply operation or ±2.2 V to ±16 V dual supplies, but the allowed input and output common-mode range depends on the actual rail voltage. Check the family datasheet for capacitor recommendations, supply-current limits, output swing, and load-current derating before finalizing the power network.
Keep the four amplifier feedback networks short and connect each return path close to the appropriate device ground pins. Avoid routing high-impedance input nodes beside supply traces and switching-node copper because input-bias-current error and capacitive pickup can degrade accuracy. The 2.5 MHz gain-bandwidth product does not remove the need for careful PCB layout; use a compact ground reference and minimize loop area around each amplifier section.
Do not treat the 2.5 MHz gain-bandwidth value as the usable closed-loop bandwidth at every gain. Actual bandwidth and stability depend on gain, feedback resistance, source and load impedance, capacitance, and supply conditions. Likewise, the 20 V/µs slew rate applies under the manufacturer's stated conditions. Verify input offset, bias current, common-mode range, output swing, and load drive in the complete LM2900 datasheet before using the device in precision or precision-adjacent signal paths.
규정 준수 정보
The supplied verified excerpts identify the manufacturer and device category but do not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. These fields remain unknown rather than being inferred from the distributor listing.
