Analog Devices Inc. LT6657AHMS8-4.096#TRPBF

Overview

LT6657AHMS8-4.096#TRPBF from Analog Devices (formerly Linear Technology) is a precision buffered voltage reference IC delivering 4.096V output with ±0.1% initial accuracy, 1.5ppm/°C max temperature drift, and 0.5ppm_P-P (0.1Hz–10Hz) low-frequency noise. It operates from VIN as low as VOUT + 50mV up to 40V, sources/sinks ±10mA, and supports shunt/negative-reference configurations in high-resolution data acquisition systems.

For engineers reviewing the LT6657AHMS8-4.096#TRPBF datasheet, LT6657AHMS8-4.096#TRPBF pinout, LT6657AHMS8-4.096#TRPBF application, or LT6657AHMS8-4.096#TRPBF equivalent, key selection criteria include guaranteed 1.5ppm/°C drift over –40°C to 125°C, shutdown current <4µA, reverse supply/output protection, and MSOP-8 package compatibility with space-constrained industrial instrumentation layouts.

Technical Context

The LT6657AHMS8-4.096#TRPBF uses advanced curvature-compensated bandgap architecture to achieve predictable, monotonic temperature behavior and low hysteresis (35ppm over –40°C to 125°C). Its buffered output stage enables precise load regulation (2µV/mA sourcing, 3µV/mA sinking) without external op-amps.

It integrates robust protection: thermal shutdown, short-circuit current limiting (15mA sink / 16mA source), reverse battery tolerance (–40V on VIN), and reverse output protection (–3V on VOUT). The SHDN pin provides logic-level control with 1.6V high-threshold and <2µA leakage at 1.6V.

Key Specifications

Pinout & Package

LT6657AHMS8-4.096#TRPBF is housed in an 8-lead plastic MSOP package (3mm × 3mm, 0.85mm height) with exposed pad for thermal enhancement. Pins 1, 5, 7, and 8 are internally connected and must remain unconnected.

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 LT6657AHMS8-4.096#TRPBF delivers superior drift (1.5 vs. 3ppm/°C), lower low-frequency noise (0.5 vs. ≥1.2ppm_P-P), integrated shutdown (<4µA), and reverse-battery protection-making it optimal for compact, high-accuracy, safety-critical industrial and automotive designs.

Availability

LT6657AHMS8-4.096#TRPBF is available at Aetrix Electronics and suitable for high-resolution data acquisition systems, industrial process controllers, automotive battery monitors, and medical patient monitoring devices requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LT6657AHMS8-4.096#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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.

The LT6657 series was designed by ADI's former Linear Technology division specifically for applications demanding ultra-low drift, low noise, and robust fault tolerance in harsh environments-targeting precision instrumentation, test equipment, and mission-critical embedded systems.

FAQ

What is the guaranteed initial accuracy of the LT6657AHMS8-4.096#TRPBF?

The LT6657AHMS8-4.096#TRPBF has a guaranteed initial output voltage accuracy of ±0.1% at 25°C, meaning its 4.096V output falls within 4.0919V to 4.1001V before temperature or aging effects. This specification is fully tested and binned during manufacturing, and applies across the full –40°C to 125°C operating range per the datasheet's "l" notation.

Can the LT6657AHMS8-4.096#TRPBF operate as a negative voltage reference?

Yes, the LT6657AHMS8-4.096#TRPBF can be configured as a negative reference using its bidirectional output stage. When VOUT is tied to a positive supply and the load connects between GND and VOUT, the device sinks current while maintaining precise regulation-enabling true negative reference operation without external components, as confirmed in the "Positive or Negative Shunt Mode Operation" section of the datasheet.

What is the minimum input-to-output voltage differential required for regulation in the LT6657AHMS8-4.096#TRPBF?

The LT6657AHMS8-4.096#TRPBF guarantees regulation with a minimum VIN–VOUT differential of 50mV across temperature and load conditions. At 25°C and zero load, typical dropout is 20mV; at 125°C and 10mA sourcing, it rises to 500mV. This ultra-low dropout enables operation from tightly regulated 4.15V supplies common in isolated power architectures.

Does the LT6657AHMS8-4.096#TRPBF require external capacitors, and if so, what values?

Yes, the LT6657AHMS8-4.096#TRPBF requires a 0.1µF ceramic capacitor between VIN and GND, and a ≥1µF ceramic capacitor (X7R or C0G) between VOUT and GND. These are mandatory for stability, PSRR optimization, and transient response-omitting them risks oscillation or degraded noise performance, as detailed in the "Bypass and Load Capacitors" application note.

How does the LT6657AHMS8-4.096#TRPBF handle reverse supply conditions?

The LT6657AHMS8-4.096#TRPBF withstands –40V on the VIN pin relative to GND and –3V on VOUT relative to GND, per Absolute Maximum Ratings. This reverse-supply protection eliminates the need for external series diodes in automotive or industrial systems where battery reversal or inductive kickback may occur-preserving reference accuracy without added forward-voltage drop or thermal loss.