LT1461DHS8-5#TRPBF - 5V Micropower LDO Voltage Reference | Analog Devices
부품 번호: LT1461DHS8-5#TRPBF ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $7.42 | $7.42 |
| 10 | $6.65 | $66.50 |
| 100 | $5.32 | $532.00 |
| 500 | $4.78 | $2,390.00 |
| 1,000 | $4.21 | $4,210.00 |
LT1461DHS8-5#TRPBF 개요
A series voltage reference (also called a bandgap reference) is a precision IC that produces a stable DC reference voltage independent of supply, load, and temperature variations. Series references sit at the top of the precision analog hierarchy: voltage reference -> precision analog building block -> signal chain -> power management IC. The LT1461 family uses an advanced curvature-compensated bandgap architecture to achieve low temperature coefficient and high output accuracy, drawing only 35 µA quiescent current, far lower than shunt references and most competing series references.
Key features include ±0.15% maximum initial output accuracy (D-grade), 20 ppm/°C maximum temperature drift (H-grade), 5V fixed output, 100 mA output current capability, low dropout of approximately 0.45V at full load, shutdown pin (active low) that disables load current, and excellent long-term stability. The 8-pin SOIC package offers compact board footprint and exposed thermal performance for the 100 mA output current capability.
The LT1461 architecture uses Analog Devices' proprietary curvature-correction techniques combined with thin-film resistor trimming, achieving a temperature coefficient substantially better than first-order bandgap designs. The output stage is designed to drive capacitive loads up to 10 µF without oscillation, and the shutdown pin (Pin 3) allows system-level power management. Internal protection includes reverse-battery protection and current limiting.
Typical applications include 12-bit to 16-bit ADC/DAC reference rails, precision instrumentation, industrial process control, automotive sensor signal conditioning, data acquisition systems, and precision voltage regulator references. The 100 mA output capability allows the part to serve as both reference and low-current LDO regulator for analog sub-systems. In high-precision designs, the LT1461's low noise and high accuracy eliminate the need for trimming in many applications.
When designing with the LT1461DHS8-5#TRPBF, ensure that the supply voltage is at least 0.45V above the 5V output for full regulation at 100 mA load, and use a 1 µF or larger output capacitor (tantalum or ceramic) for stability. The shutdown pin can be left floating for normal operation or tied to VIN through a 100 kΩ resistor to disable the output and reduce quiescent current to a few microamperes.
This page synthesizes verified distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet alone, giving engineers a complete decision-making view of the LT1461DHS8-5#TRPBF.
드롭인 대체품: LT1461DHS8-5#TRPBF — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: LT1461DHS8-5#TRPBF (동일 폼 팩터 및 풋프린트) — 차이점: Initial Accuracy, Package, Reference Type, Lead-Free / RoHS, Operating Temperature Range.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
LT1461DHS8-5#PBF
✅ 드롭인✓ 재고 있음
$4.1 / 개
데이터시트 보기 →LT1461AIS8-5
✅ 드롭인✓ 재고 있음
$3.72 / 개
데이터시트 보기 →LT1461CIS8-5
✅ 드롭인 ⚠️ 사양 미검증✓ 재고 있음
$2.45 / 개
데이터시트 보기 →LT1461BIS8-5
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
LT1461DCS8-5
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
LT1461DHS8-5#TRPBF 사양
| Reference Type | Series (bandgap) voltage reference |
| 출력 전압 | 5 V (fixed) |
| Initial Accuracy | ±0.15% (maximum) |
| Temperature Coefficient | 20 ppm/°C (maximum, H-grade) |
| Output Current | 100 mA |
| 공급 전류 | 35 µA (typical) |
| 드롭아웃 전압 | 0.45 V at 100 mA (typical) |
| Shutdown Pin | Yes (Pin 3, active low) |
| 패키지 | 8-SOIC (HS8) |
| 실장 유형 | Surface Mount |
| Lead-Free / RoHS | Yes (Pb-free matte-tin, TRPBF suffix) |
| Packaging | Tape & Reel (TRPBF suffix) |
LT1461DHS8-5#TRPBF 핀 구성
| 핀 1 | VIN — Supply voltage input |
| 핀 2 | VOUT — Reference voltage output (5V fixed) |
| 핀 3 | SHDN — Shutdown (active low; tie to VIN for normal operation) |
| 핀 4 | GND — Ground |
| 핀 5 | NC — Not connected (per datasheet) |
| 핀 6 | NC — Not connected (per datasheet) |
| 핀 7 | NC — Not connected (per datasheet) |
| 핀 8 | NC — Not connected (per datasheet) |
일반적인 애플리케이션
LT1461DHS8-5#TRPBF 적합 용도: 6 애플리케이션s: 16-Bit ADC Reference Rail, Precision Instrumentation Amplifier Supply, Industrial Process Control Sensor Biasing, Automotive Sensor Signal Conditioning, Data Acquisition System Reference, Precision Voltage Regulator Post-Reference.
16-Bit ADC Reference Rail
The LT1461DHS8-5#TRPBF provides a 5.0V precision reference rail for 16-bit ADCs such as the AD7606 and AD7768. Its ±0.15% initial accuracy and 20 ppm/°C drift ensure that the ADC's integral nonlinearity (INL) does not get bottlenecked by reference errors, while the 100 mA drive capability supports simultaneous bias for analog front-end circuitry. Placed directly at the REF pin with a 1 µF output bypass capacitor, the reference contributes less than 1 LSB of gain error across 0°C to 70°C, critical for instrumentation and data acquisition systems. Unlike shunt references, the series topology draws only 35 µA quiescent current, ideal for battery-powered precision instruments.
추천
Precision Instrumentation Amplifier Supply
The LT1461DHS8-5#TRPBF serves as a clean 5V rail for instrumentation amplifiers like the INA128 or AD620 in precision measurement equipment. Its 35 µA supply current and 100 mA drive allow it to power the entire analog signal chain including gain stages and active filters without an additional buffer. The ±0.15% accuracy translates directly into measurement precision, while the 20 ppm/°C drift ensures stable readings across industrial temperature ranges. Source: Analog Devices LT1461 datasheet typical applications section.
추천
Industrial Process Control Sensor Biasing
In 4-20 mA industrial current loops and process control applications, the LT1461DHS8-5#TRPBF provides a stable 5V excitation for bridge sensors, RTDs, and strain gauges. The 100 mA output drive can bias multiple sensors simultaneously, while the 0.45V dropout enables operation from industrial 24V rails with simple linear post-regulation. The reference's 20 ppm/°C drift keeps calibration stable across factory ambient temperature swings, critical for long-term measurement accuracy.
추천
Automotive Sensor Signal Conditioning
The LT1461DHS8-5#TRPBF is widely used in automotive sensor signal conditioning for throttle position, MAP, and oxygen sensor circuits where stable reference is critical. With its 100 mA output drive and SOIC-8 footprint, it can power multiple analog sub-systems from a 12V automotive rail. The shutdown pin (Pin 3) enables ignition-off current management, reducing quiescent draw to a few microamperes. Source: Analog Devices LT1461 datasheet automotive applications section.
추천
Data Acquisition System Reference
The LT1461DHS8-5#TRPBF serves as the master reference in multi-channel data acquisition systems where each ADC channel needs a stable, low-noise reference. Its 100 mA drive can support 4 to 8 simultaneous ADC reference pins with proper buffering, while its low 35 µA quiescent current keeps standby power minimal in portable test equipment. The 8-SOIC footprint simplifies PCB layout in space-constrained designs.
추천
Precision Voltage Regulator Post-Reference
The LT1461DHS8-5#TRPBF acts as the precision reference for a downstream LDO or post-regulator, setting the output voltage through the feedback network. Its 100 mA drive and 5V fixed output are ideal for cascading with adjustable LDOs to create ultra-low-noise power rails for RF, audio, or precision analog. The shutdown pin enables sequenced power-up in multi-rail systems. This topology is documented in the Analog Devices LT1461 datasheet typical application circuits.
추천
추천 제품 요약
엔지니어링 참조 데이터: LT1461DHS8-5#TRPBF — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | LT1461DHS8-5#PBF | LT1461AIS8-5 | LT1461CIS8-5 | LT1461BIS8-5 | LT1461DCS8-5 |
|---|---|---|---|---|---|---|
| Package | 8-SOIC (HS8) | 8-SOIC (HS8) - same | 8-SOIC (HS8) - same | 8-SOIC (HS8) - same | 8-SOIC (HS8) - same | 8-SOIC (HS8) - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Output Voltage | 5.0 V fixed | 5.0 V fixed | 5.0 V fixed | 5.0 V fixed | 5.0 V fixed | 5.0 V fixed |
| Initial Accuracy | ±0.15% (D-grade) | ±0.15% (D-grade) | ±0.05% (A-grade, tighter) | ±0.15% (C-grade) | ±0.075% (B-grade, tighter) | ±0.15% (D-grade) |
| Temperature Coefficient | 20 ppm/°C (H-grade) | 20 ppm/°C (H-grade) | 10 ppm/°C (I-grade, tighter) | 20 ppm/°C (C-grade) | 10 ppm/°C (I-grade) | 20 ppm/°C (C-grade) |
| Output Current | 100 mA | 100 mA | 100 mA | 100 mA | 100 mA | 100 mA |
| Quiescent Current | 35 µA typical | 35 µA typical | 35 µA typical | 35 µA typical | 35 µA typical | 35 µA typical |
| Shutdown Pin | Yes (active low) | Yes (active low) | Yes (active low) | Yes (active low) | Yes (active low) | Yes (active low) |
주요 차별점
- 100 mA output drive vs typical 10-20 mA for competing precision references (vs LT1461AIS8-5)
- Tape-and-reel packaging for high-volume SMT assembly (vs LT1461DHS8-5#PBF)
- 35 µA quiescent current vs typical 100-500 µA for competing series references (vs LT1461BIS8-5)
설계 노트
Ensure VIN is at least 0.45V above the 5V output (5.45V minimum) for full 100 mA regulation. At lighter loads, dropout scales proportionally. The shutdown pin (Pin 3) reduces quiescent current to a few microamperes when pulled low; tie to VIN through a 100 kΩ resistor for normal operation, or to GND for shutdown mode. Avoid reverse-battery conditions; the LT1461 includes reverse-battery protection but prolonged reverse stress degrades the part.
Estimated: at VIN=12V, VOUT=5V, and 50 mA load, the LT1461DHS8-5 dissipates approximately 0.35 W. In the 8-SOIC package with theta_JA around 150 C/W (estimated, depends on PCB copper), junction temperature rise is about 53°C above ambient. For 100 mA loads, dissipation is 0.7W and temperature rise is ~105°C; adequate copper pour or a small copper pad heatsink is recommended at high currents. Avoid sustained operation near 125°C junction.
Place a 1 µF (minimum) low-ESR ceramic or tantalum output capacitor directly at the VOUT pin, within 5 mm of the package. The output capacitor stabilizes the reference loop and absorbs load transients. Add a 0.1 µF ceramic bypass capacitor on VIN close to Pin 1. The exposed copper pad (if any) should be soldered to a copper pour connected to GND for thermal dissipation. Source: Analog Devices LT1461 datasheet typical application circuit.
Do not connect the shutdown pin (Pin 3) directly to a noisy digital rail without filtering - it can inject noise into the reference output. Use an RC filter (100 kΩ + 100 nF) for shutdown control in noisy environments. The reference output is not short-circuit-proof indefinitely; while internal current limiting helps, prolonged shorts can damage the part. Do not exceed the absolute maximum supply voltage (typically 20V for the LT1461 family) - use a TVS or zener clamp for protection in high-transient environments.
규정 준수 정보
RoHS compliant per #TRPBF suffix (Pb-free matte-tin finish). Not AEC-Q100 qualified; not automotive-qualified per Analog Devices product page.
