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Analog Devices Inc. LT6657AHMS8-3#TRPBF
- Part No.:
- LT6657AHMS8-3#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LT6657AHMS8-3#TRPBF.pdf
- Description:
- IC VREF SERIES 0.1% 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,068
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Product details
Overview
LT6657AHMS8-3#TRPBF from Analog Devices (formerly Linear Technology) is a precision buffered voltage reference IC delivering 3.0V output with ±0.1% initial accuracy, 1.5ppm/°C max temperature drift, and 0.5ppmP-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 LT6657AHMS8-3#TRPBF datasheet, LT6657AHMS8-3#TRPBF pinout, LT6657AHMS8-3#TRPBF application, or LT6657AHMS8-3#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 LT6657AHMS8-3#TRPBF uses advanced curvature-compensated bandgap architecture to achieve predictable 1.5ppm/°C drift across its full operating range. Its buffered output stage enables bidirectional ±10mA drive while maintaining 2µV/mA load regulation and 0.2ppm/V line regulation - critical for metrology-grade ADC biasing and sensor excitation circuits.
It integrates active shutdown control (SHDN pin), thermal shutdown, short-circuit current limiting, and reverse-battery protection. The device supports both series-mode regulation and shunt-mode operation (except for 1.25V variant), enabling flexible use as positive or negative reference without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0V ±0.1% initial accuracy - ensures absolute voltage reference stability for 16-bit+ SAR and delta-sigma ADCs. |
| Tempco | 1.5ppm/°C max (–40°C to 125°C) - guarantees ≤0.5mV total drift over full industrial temperature range. |
| Noise (0.1–10Hz) | 0.5ppmP-P - translates to 1.5µVP-P at 3V, enabling ultra-low-noise sensor signal chains. |
| Min. VIN–VOUT | 50mV (sourcing, IOUT = 0mA) - allows operation from ultra-low headroom supplies like LiFePO4 battery rails. |
| Output Drive | ±10mA continuous - supports direct driving of DAC reference inputs, op-amp bias networks, and multiplexed sensor bridges. |
| Shutdown Current | <4µA max - enables micro-power sleep modes in portable test equipment and battery-backed data loggers. |
| Package | 8-lead MSOP - surface-mount footprint compatible with automated assembly and thermal performance θJA = 273°C/W. |
Pinout & Package
LT6657AHMS8-3#TRPBF is housed in an 8-lead plastic MSOP (MS8) package with exposed pad (not electrically connected). Pins 1, 5, 7, and 8 are DNC (do not connect); external circuitry must be omitted from these terminals to ensure specified performance and reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (DNC) | Internally connected | No external connection permitted; floating per datasheet to avoid leakage-induced error. |
| Pin 2 (VIN) | Input supply | Accepts 3.05V–40V; bypass with ≥0.1µF ceramic capacitor to GND for PSRR optimization. |
| Pin 3 (SHDN) | Active-low shutdown control | Pull ≤0.8V to enter shutdown (<4µA IQ); tie to VIN if unused. |
| Pin 4 (GND) | Analog ground reference | Must connect to low-impedance star ground; carries return current for VIN and load paths. |
| Pin 5 (DNC) | Internally connected | No external connection permitted; floating per datasheet. |
| Pin 6 (VOUT) | Regulated 3.0V output | Sources/sinks ±10mA; requires ≥1µF output capacitor for stability and transient response. |
| Pin 7 (DNC) | Internally connected | No external connection permitted; floating per datasheet. |
| Pin 8 (DNC) | Internally connected | No external connection permitted; floating per datasheet. |
Key Features
| Feature | Design Value |
|---|---|
| Low-drift curvature compensation | Guarantees monotonic, predictable 1.5ppm/°C drift behavior - eliminates need for system-level temperature calibration. |
| Bidirectional output stage | Supports ±10mA sourcing/sinking - enables use as negative reference or shunt regulator without external transistors. |
| Reverse supply & output protection | Withstands –40V on VIN and –3V on VOUT - protects against battery reversal and ESD coupling in automotive and field instrumentation. |
| Ultra-low 0.1–10Hz noise | 0.5ppmP-P (1.5µVP-P) - meets noise floor requirements for 24-bit delta-sigma ADCs in weigh scales and precision thermometry. |
| Shunt-mode configurability | Operates with VIN = VOUT (positive shunt) or VIN < VOUT (negative shunt) - expands topology options beyond standard series references. |
Applications
| High-Resolution Data Acquisition | Industrial Process Control |
|---|---|
Use Scenario: 24-bit isolated analog input module for PLC analog I/O cards measuring RTD, thermocouple, and strain gauge signals. IC Role / Device Role / Timing Role: Primary 3.0V reference for dual-slope and delta-sigma ADCs, providing stable excitation and conversion基准. Use Value: 1.5ppm/°C drift and 0.5ppmP-P noise enable ≤0.001% total unadjusted error over –40°C to 70°C ambient. |
Use Scenario: Loop-powered 4–20mA transmitter with HART modulation, requiring stable internal reference under wide supply and temperature variation. IC Role / Device Role / Timing Role: Precision 3.0V reference for DAC-based current loop control and sensor signal conditioning. Use Value: 50mV dropout and reverse protection allow reliable operation from 3.3V rail with brownout resilience and field-wiring fault tolerance. |
| Automotive Battery Monitoring | Medical Patient Monitoring |
Use Scenario: High-voltage battery pack monitor (up to 40V) in EV/ESS systems measuring cell voltages with 1mV resolution. IC Role / Device Role / Timing Role: 3.0V reference for isolated ADCs sampling stacked lithium-ion cells via resistive dividers. Use Value: 40V absolute max VIN and –40°C to 125°C rating support direct integration into battery management ASIC power domains. |
Use Scenario: Portable ECG/EEG front-end with low-noise instrumentation amplifiers and 24-bit ADCs for microvolt-level biopotential measurement. IC Role / Device Role / Timing Role: Ultra-low-noise 3.0V reference for ADC reference input and op-amp biasing in analog signal chain. Use Value: 0.5ppmP-P noise and 2µV/mA load regulation preserve SNR > 110dB in battery-operated devices with dynamic load currents. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF5030IDR | 3.0V, 3ppm/°C max drift, 3.8µVP-P (0.1–10Hz) noise, SOIC-8 package | Larger 3.5mm × 4.9mm SOIC footprint; higher noise limits use in 24-bit systems | Select when board space permits larger package and 3ppm/°C drift is acceptable for cost-sensitive industrial designs. |
| ADR4530BRZ | 3.0V, 3ppm/°C max drift, 1.2µVP-P (0.1–10Hz) noise, SOIC-8 package, no shutdown | No SHDN pin; higher noise; lacks reverse protection and shunt-mode capability | Choose for fixed-supply, non-shutdown applications where ADR45xx family qualification is required and 1.2µVP-P noise suffices. |
Compared with REF5030IDR and ADR4530BRZ, the LT6657AHMS8-3#TRPBF offers superior 1.5ppm/°C drift, lower 0.5ppmP-P noise, integrated shutdown, and shunt-mode flexibility - making it optimal for compact, high-accuracy, and power-aware designs where MSOP-8 fit is critical.
Availability
LT6657AHMS8-3#TRPBF is available at Aetrix Electronics and suitable for high-resolution data acquisition systems, industrial process controllers, and automotive battery monitoring modules requiring stable component supply with guaranteed long-term parametric consistency.
Supply support for LT6657AHMS8-3#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 precision analog group to address demanding metrology and instrumentation applications requiring sub-ppm/°C drift, ultra-low noise, and robust fault protection in compact packages.
FAQ
What is the maximum operating temperature range for the LT6657AHMS8-3#TRPBF?
The LT6657AHMS8-3#TRPBF is fully specified over –40°C to +125°C junction temperature. Its guaranteed 1.5ppm/°C drift, 0.5ppmP-P noise, and ±10mA output drive apply across this entire range, making it suitable for under-hood automotive and industrial environments where thermal stress is severe.
Can the LT6657AHMS8-3#TRPBF be used as a negative voltage reference?
Yes, the LT6657AHMS8-3#TRPBF can operate as a negative reference by sinking current with VIN below VOUT - down to –250mV (guaranteed –50mV) differential. This enables true two-terminal shunt operation in negative-rail circuits without external components, unlike most bandgap references limited to positive-only configurations.
What output capacitor value is required for stable operation of the LT6657AHMS8-3#TRPBF?
The LT6657AHMS8-3#TRPBF requires a minimum 1µF ceramic output capacitor (X7R or C0G) placed close to the VOUT and GND pins. For improved transient response and phase margin, a 1µF ceramic in parallel with a 47µF tantalum is recommended. ESR must remain below 0.5Ω to prevent instability.
Does the LT6657AHMS8-3#TRPBF support shutdown mode, and what is its quiescent current in that state?
Yes, the LT6657AHMS8-3#TRPBF features an active-low SHDN pin (Pin 3). When pulled ≤0.8V, it enters shutdown with typical supply current of 2µA; at ≤0.4V, current drops to 0.01µA typical. Turn-on time is 180µs (0.1% settling, COUT = 1µF), enabling rapid wake-up in duty-cycled systems.
How does the LT6657AHMS8-3#TRPBF compare to the LT6657BHMS8-3#TRPBF in terms of temperature coefficient?
The LT6657AHMS8-3#TRPBF has a maximum temperature coefficient of 1.5ppm/°C over –40°C to 125°C, whereas the LT6657BHMS8-3#TRPBF is rated at 3ppm/°C max. Both share identical 3.0V output, ±0.1% initial accuracy, noise, and package - the 'A' grade is selected for highest-stability applications such as calibration equipment and metrology standards.
LT6657AHMS8-3#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 1.5ppm/°C
- Noise - 0.1Hz to 10Hz:
- 0.5ppmp-p
- Noise - 10Hz to 10kHz:
- 0.8ppmrms
- Voltage - Input:
- 3.5V ~ 40V
- Current - Supply:
- 1.2mA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
LT6657AHMS8-3#TRPBF FAQ
1.How can I place an order for LT6657AHMS8-3#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT6657AHMS8-3#TRPBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LT6657AHMS8-3#TRPBF reliable?
The price and inventory of LT6657AHMS8-3#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT6657AHMS8-3#TRPBF is usually 5 days.
3.What payment methods are accepted for LT6657AHMS8-3#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT6657AHMS8-3#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT6657AHMS8-3#TRPBF?
LT6657AHMS8-3#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT6657AHMS8-3#TRPBF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LT6657AHMS8-3#TRPBF?
For technical support, including LT6657AHMS8-3#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT6657AHMS8-3#TRPBF requirements.
6.How does Aetrix verify that LT6657AHMS8-3#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT6657AHMS8-3#TRPBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LT6657AHMS8-3#TRPBF meets industry standards.
7.What is the process for return or replacement of LT6657AHMS8-3#TRPBF?
All LT6657AHMS8-3#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT6657AHMS8-3#TRPBF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LT6657AHMS8-3#TRPBF part is unused and in its original packaging.
Return procedure for LT6657AHMS8-3#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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