LM7321MFX/NOPB - 32V 20MHz RRIO Op Amp SOT-23-5 | TI
부품 번호: LM7321MFX/NOPB ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $1.29 | $1.29 |
| 10 | $1.16 | $11.60 |
| 100 | $0.92 | $92.00 |
| 500 | $0.75 | $375.00 |
| 1,000 | $0.6 | $600.00 |
LM7321MFX/NOPB 개요
An operational amplifier (op amp) is a high-gain voltage amplifier used in the analog signal chain hierarchy: amplifier IC -> general-purpose op amp -> precision analog front end. The LM7321 belongs to the rail-to-rail op amp class, whose input and output stages swing to within millivolts of both supply rails, maximizing dynamic range in low-voltage and single-supply systems.
Key differentiating features include unlimited capacitive load stability - the output drives large capacitive loads directly without external compensation - plus the high 65-mA output current that allows the device to drive heavy loads such as coaxial cables, ADC inputs, and actuator drivers. The rail-to-rail I/O architecture maintains performance across the full 2.7V, +/-5V, and +/-15V operating points specified by TI, and the wide temperature range of -40C to +125C supports industrial and automotive-adjacent designs.
Internally, the LM732xx family uses a complementary input stage that seamless transfers near the rails, preserving bandwidth and phase margin across the common-mode range. The combination of 20-MHz bandwidth with only 1-mA quiescent current yields an excellent bandwidth-to-power figure compared with general-purpose parts such as the LM358.
Typical applications include video and coaxial cable drivers, ADC input buffering, active filters, piezo and capacitive load drivers, test-and-measurement signal conditioning, and battery-powered portable instrumentation. The NOPB suffix indicates RoHS-compliant, lead-free terminations.
Design tip: while capacitive load stability is essentially unlimited, keep supply decoupling close to the pins (100 nF per rail) and beware of thermal limits when sourcing 65 mA continuously at high output voltage swing.
드롭인 대체품: LM7321MFX/NOPB — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
LM7321QMFX/NOPB
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
LM8261M5X/NOPB
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
MCP6291T-E/OT
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
AD8615ARTZ
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
LM7321MFX/NOPB 최대 정격 & 전기적 특성
| Amplifier Channels | 1 |
| Unity Gain Bandwidth | 20 MHz |
| Slew Rate | 18 V/us |
| Supply Current Per Amp | 1 mA (approx.) |
| Total Supply Voltage Min | 2.5 V |
| Total Supply Voltage Max | 32 V (up to +/-16 V) |
| Output Current | 65 mA |
| Input/Output Type | Rail-to-Rail Input and Output (RRIO) |
| Capacitive Load Drive | Unlimited capacitive load |
| 동작 온도 범위 | -40C to +125C |
| 패키지 | SOT-23-5 (DBV), 5 pins |
| 실장 유형 | Surface Mount |
| Packaging | Tape & Reel (MFX) |
| RoHS 상태 | Compliant (NOPB, lead-free) |
| Specified Supply Points | 2.7 V, +/-5 V, +/-15 V |
| Type | General Purpose Amplifier |
LM7321MFX/NOPB 핀 구성
| 핀 1 | OUT — Amplifier output (rail-to-rail, 65 mA) |
| 핀 2 | V- — Negative supply rail / GND (single supply) |
| 핀 3 | IN+ — Non-inverting input (rail-to-rail) |
| 핀 4 | IN- — Inverting input (rail-to-rail) |
| 핀 5 | V+ — Positive supply rail (2.5V to 32V total) |
일반적인 애플리케이션
LM7321MFX/NOPB 적합 용도: 6 애플리케이션s: Coaxial Cable Driver, ADC Input Buffering, Battery-Powered Portable Instrumentation, Industrial Signal Conditioning, Active Filter Design, Test and Measurement Probes.
Coaxial Cable Driver
The LM7321MFX/NOPB's 65-mA output current and unlimited capacitive load stability make it a natural line driver for coaxial cables in video and instrumentation systems. Conventional op amps oscillate when driving cable capacitance, but the LM7321 remains stable without series isolation resistors. Placed at the output of a signal generator or camera path, it delivers 20-MHz bandwidth across a 2.5V-to-32V supply range, and the SOT-23-5 footprint keeps the driver near the connector to minimize trace inductance.
추천
ADC Input Buffering
Switched-capacitor SAR ADC inputs draw transient charge that destabilizes ordinary op amps. The LM7321 solves this with 65-mA transient drive and unlimited capacitive load stability, allowing a direct RC filter capacitor at the ADC input. Its rail-to-rail I/O preserves full-scale swing on single 5V supplies, and 20-MHz bandwidth settles sampling transients well within typical microsecond acquisition windows. TI specifies full performance at 2.7V and +/-5V, matching common ADC supply architectures.
추천
Battery-Powered Portable Instrumentation
With only about 1 mA of supply current per amplifier, the LM7321 balances speed and power for battery-operated instruments, sensors, and handheld meters. The 2.5V minimum supply supports single-cell Li-Ion (3.0V-4.2V) rails, and rail-to-rail I/O extracts maximum dynamic range as the battery discharges. Unlike micropower op amps that sacrifice bandwidth to single-digit kHz or MHz, the LM7321 retains 20-MHz GBW, enabling fast pulse and AC measurements in portable designs.
추천
Industrial Signal Conditioning
Industrial PLC and sensor interfaces benefit from the LM7321's 32V total supply ceiling, which directly accommodates +/-15V analog backplanes without level-shifting front ends. The -40C to +125C temperature range covers factory-floor extremes, and high output current drives heavy filter networks, cable runs, and actuators. TI fully specifies parameters at +/-15V, so gain-bandwidth and slew rate numbers in industrial designs match datasheet conditions rather than derated curves.
추천
Active Filter Design
High-Q active filters need amplifiers whose bandwidth exceeds the filter corner by 20x or more and whose output stage tolerates the reactive loads of feedback capacitors. The LM7321's 20-MHz GBW supports filter corners into the hundreds of kHz with stable Q, and unlimited capacitive load drive prevents oscillation in Sallen-Key and multiple-feedback topologies with large capacitor values. The 18-V/us slew rate keeps large-signal distortion low for filter outputs swinging several volts.
추천
Test and Measurement Probes
Handheld probes and scope front-ends demand small size, wide supply tolerance, and strong drive into cable loads. The LM7321's SOT-23-5 package fits probe-tip geometries, its +/-16V dual-supply rating handles bench instruments, and the 65-mA drive keeps 1-M//pF probe loads accurate at fast edges. Unlimited capacitive load stability is critical because probe cable capacitance varies between cable lengths - the LM7321 tolerates this variation without compensation redesign.
추천
추천 제품 요약
엔지니어링 참조 데이터: LM7321MFX/NOPB — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | LM7321QMFX/NOPB | LM8261M5X/NOPB | MCP6291T-E/OT | AD8615ARTZ |
|---|---|---|---|---|---|
| Package | SOT-23-5 (DBV) | SOT-23-5 (DBV) - same | SOT-23-5 - same | SOT-23-5 - same | SOT-23-5 - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Microchip Technology | Analog Devices |
| Output Current | 65 mA | 65 mA | lower (verify datasheet) | lower (verify datasheet) | lower (verify datasheet) |
| Automotive Grade | No | Yes (AEC-Q100) | No | No | No |
주요 차별점
- 65-mA output current in a SOT-23-5 (vs MCP6291T-E/OT)
- Unlimited capacitive load stability (vs AD8615ARTZ)
- Automotive variant of same die available (vs LM7321QMFX/NOPB)
설계 노트
The LM7321 accepts 2.5V to 32V total supply (up to +/-16V dual). Always place 100-nF ceramic decoupling capacitors within 2 mm of the V+ and V- pins, plus a 2.2-uF bulk capacitor per rail. Although quiescent current is only about 1 mA, the output can source 65 mA, so supply traces must be sized for peak load currents to avoid rail droop during transients.
When sourcing high output current into low-impedance loads, junction dissipation equals (V+ - VOUT) * IOUT during sourcing. In the tiny SOT-23-5 package with limited theta_JA, sustained 65-mA operation at large voltage drops can raise junction temperature significantly; verify worst-case dissipation against the -40C to +125C rating and add copper pour area under the pins when running near limits.
Although the LM7321 is unlimited-capacitive-load stable, extreme capacitive loads reduce bandwidth (closed-loop pole interaction), which slows settling in ADC applications - account for reduced effective bandwidth, not instability. Also note two datasheet generations quote 18-V/us and 35-V/us family slew rates; confirm against the specific LM7321 datasheet revision (SNOS759) you design to.
규정 준수 정보
NOPB suffix denotes TI non-Pb, RoHS-compliant lead-free terminations. Standard grade, not AEC-Q100 - use LM7321QMFX/NOPB for automotive qualification.
