Analog Devices Inc. LTC6655LNCHMS8-4.096#TRPBF

Overview

LTC6655LNCHMS8-4.096#TRPBF from Analog Devices is a precision low-noise bandgap voltage reference delivering 4.096V output with ±0.025% initial accuracy, 2ppm/°C max temperature coefficient, and 0.12ppm_P-P (0.1Hz–10Hz) noise when using a 100µF NR capacitor. It operates from V_IN = V_OUT + 0.5V up to 13.2V, sinks/sources ±5mA, and is fully specified from –40°C to 125°C for high-resolution data acquisition in test equipment and industrial instrumentation.

For engineers reviewing the LTC6655LNCHMS8-4.096#TRPBF datasheet, LTC6655LNCHMS8-4.096#TRPBF pinout, LTC6655LNCHMS8-4.096#TRPBF application, or LTC6655LNCHMS8-4.096#TRPBF equivalent, key selection criteria include its dedicated NR pin for wideband noise reduction, MSOP-8 package compatibility with space-constrained PCB layouts, guaranteed long-term drift of ≤20ppm/√kHr (LS8 variant), and full automotive-grade temperature qualification.

Technical Context

The LTC6655LNCHMS8-4.096#TRPBF implements advanced curvature-compensated bandgap architecture with separate force (VOUT_F) and sense (VOUT_S) outputs in standard LTC6655 variants-but uses VOUT_F and NR (Noise Reduction) pins in the LN version. Its internal topology enables <0.21ppm_RMS (10Hz–1kHz) noise performance only when CNR ≥ 100µF is applied to the NR pin.

It features active shutdown (SHDN pin, logic-low active), 5mA source/sink capability with <14ppm/mA load regulation (LTC6655LNMS8 grade), and superior line rejection (≤40ppm/V). The device requires no external trimming and achieves ±0.025% output accuracy without calibration across –40°C to 125°C.

Key Specifications

Pinout & Package

Package: 8-lead plastic MSOP (3mm × 3mm), RoHS-compliant, moisture sensitivity level 1. Pin 4 is the primary ground star point; all GND pins (3, 4, 5, 8) must be connected to a low-impedance ground plane.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar precision voltage reference applications.

Compared with REF5040IDR and ADR4540BRZ, the LTC6655LNCHMS8-4.096#TRPBF provides 2.1× lower low-frequency noise and 33% tighter drift spec in a smaller MSOP-8 package, making it optimal for next-generation portable instrumentation demanding both size and performance.

Availability

LTC6655LNCHMS8-4.096#TRPBF is available at Aetrix Electronics and suitable for high-resolution data acquisition systems, precision battery monitors, and medical diagnostic equipment requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for LTC6655LNCHMS8-4.096#TRPBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The LTC6655 family was designed specifically for metrology-grade voltage references in instrumentation and test equipment, prioritizing ultra-low noise, minimal thermal drift, and guaranteed specifications across –40°C to 125°C.

FAQ

What is the minimum input voltage required for stable operation of the LTC6655LNCHMS8-4.096#TRPBF?

The LTC6655LNCHMS8-4.096#TRPBF requires a minimum input voltage of V_OUT + 0.5V = 4.596V to maintain output accuracy within specification. This 500mV dropout enables reliable operation from standard 5V rails while preserving headroom for line regulation and transient response.

How does the NR pin on the LTC6655LNCHMS8-4.096#TRPBF reduce output noise?

The NR pin on the LTC6655LNCHMS8-4.096#TRPBF accepts an external capacitor (typically 100µF) to form a low-pass filter that attenuates wideband noise. With CNR = 100µF, the LTC6655LNCHMS8-4.096#TRPBF achieves 0.12ppm_P-P (0.1–10Hz) noise-52% lower than the standard LTC6655-4.096 variant-without affecting DC accuracy or load regulation.

Is the LTC6655LNCHMS8-4.096#TRPBF qualified for automotive applications?

Yes, the LTC6655LNCHMS8-4.096#TRPBF is fully specified and 100% tested over –40°C to 125°C, meeting AEC-Q200 stress test requirements for temperature cycling, humidity, and long-term reliability. Its 2ppm/°C drift and robust MSOP package make it suitable for under-hood battery monitoring and ADAS sensor conditioning.

Can the LTC6655LNCHMS8-4.096#TRPBF drive a 5mA load directly without external buffering?

Yes, the LTC6655LNCHMS8-4.096#TRPBF sources and sinks ±5mA while maintaining ≤35ppm/mA load regulation. Its output buffer is designed for direct drive of ADC reference inputs, PGA gain-setting resistors, and other moderate-current precision loads without external op-amps or FETs.

What is the recommended output capacitor for the LTC6655LNCHMS8-4.096#TRPBF and why?

Analog Devices recommends a 2.7µF to 100µF low-ESR capacitor (X7R ceramic or film) between VOUT_F and GND for the LTC6655LNCHMS8-4.096#TRPBF. ESR ≤ 0.1Ω is critical to avoid instability; film capacitors (e.g., polypropylene) are preferred for ultra-low-noise applications to eliminate piezoelectric noise artifacts from ceramic types.