My Inquiry
My Account
Analog Devices Inc. LTC6655CHMS8-3#TRPBF
- Part No.:
- LTC6655CHMS8-3#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC6655CHMS8-3#TRPBF.pdf
- Description:
- IC VREF SERIES 0.05% 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,340
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC6655CHMS8-3#TRPBF from Analog Devices is a precision 3.0V bandgap voltage reference in an 8-lead MSOP package, delivering ±0.05% initial accuracy, 2ppm/°C max temperature coefficient, and 0.25ppmP-P (0.1Hz–10Hz) low-frequency noise - optimized for high-resolution data acquisition systems requiring stable excitation or ADC reference voltage.
For engineers reviewing the LTC6655CHMS8-3#TRPBF datasheet, LTC6655CHMS8-3#TRPBF pinout, LTC6655CHMS8-3#TRPBF application, or LTC6655CHMS8-3#TRPBF equivalent, key selection criteria include its guaranteed –40°C to 125°C operation, ±5mA source/sink capability, 500mV dropout, and dual-output architecture (VOUT_F/VOUT_S) enabling precision remote sensing in weigh scales and medical instrumentation.
Technical Context
The LTC6655CHMS8-3#TRPBF implements advanced curvature-compensated bandgap topology with separate force (VOUT_F) and sense (VOUT_S) outputs, enabling Kelvin connection to eliminate trace resistance errors. Its internal architecture supports active load regulation correction via the 2mA sense current on VOUT_S.
It features a dedicated shutdown input (SHDN) with internal pull-up, allowing <20µA quiescent current in disabled state, and operates from VIN = VOUT + 0.5V (min) up to 13.2V - supporting wide supply headroom while maintaining ±10ppm/mA load regulation over ±5mA sourcing/sinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.000V ±0.05% (±1.5mV) at 25°C - enables direct interface with 16-bit+ SAR ADCs without calibration. |
| Tempco | 2ppm/°C max (–40°C to 125°C) - ensures ≤0.72mV drift across full industrial range. |
| Noise (0.1–10Hz) | 0.25ppmP-P (750nVP-P) - critical for sub-20-bit resolution measurements in precision instrumentation. |
| Load Regulation | <10ppm/mA (±5mA) - maintains output stability under dynamic sensor excitation loads. |
| Dropout Voltage | 500mV min - allows operation from 3.5V supply in 3.3V system rails with margin. |
| Supply Range | 3.5V to 13.2V - compatible with unregulated DC-DC outputs and battery-backed supplies. |
| Shutdown Current | <20µA - enables ultra-low-power sleep modes in portable test equipment. |
Pinout & Package
Package: 8-lead MSOP (3mm × 3mm), surface-mount, RoHS-compliant, θJA = 300°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SHDN | Active-low shutdown control | Pull to GND for <20µA mode; internal pull-up enables default operation - requires external pull-high for noise immunity. |
| 2 - VIN | Power supply input | Accepts 3.5V–13.2V; requires ≥0.1µF local bypass to GND for PSRR optimization. |
| 3, 5, 8 - GND | Ground terminals | Star-connected at Pin 4 per datasheet - mandatory for minimizing ground loop error in precision layouts. |
| 4 - GND | Main reference ground | Primary ground reference point; all other GND pins must connect here via low-inductance path. |
| 6 - VOUT_S | Sense output (LTC6655 variant) | Sinks 2mA; connects directly at load to cancel PCB trace IR drop - enables true 4-wire reference accuracy. |
| 7 - VOUT_F | Force output | Sources/sinks ±5mA; drives load while VOUT_S provides feedback - separates power and sensing paths. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-output Kelvin architecture | VOUT_F/VOUT_S separation eliminates trace resistance error - delivers true load-point accuracy even with 100mΩ PCB traces. |
| Guaranteed –40°C to 125°C operation | 100% tested at extremes - eliminates derating concerns in automotive engine control or industrial motor drives. |
| Low thermal hysteresis | 30ppm (–40°C to 85°C) in MSOP - ensures repeatable calibration after thermal cycling in field-deployed equipment. |
| High PSRR (80dB @ 1kHz) | Maintains output integrity despite noisy DC-DC switching ripple - reduces need for additional LDO filtering stages. |
| Long-term drift | 60ppm/√kHr (MSOP) - predicts only ~0.12mV drift over 10 years of continuous operation at 25°C. |
Applications
| High-Resolution Data Acquisition | Weigh Scales |
|---|---|
Use Scenario: 24-bit delta-sigma ADC in portable multimeter measuring microvolt-level thermocouple signals. IC Role / Device Role / Timing Role: Primary reference voltage source for ADC conversion, providing stable 3.0V基准 with minimal noise contribution. Use Value: 0.25ppmP-P low-frequency noise ensures <1LSB error in 24-bit full-scale measurement at 10SPS. | Use Scenario: Strain-gauge bridge excitation in legal-for-trade platform scale operating from –10°C to 50°C ambient. IC Role / Device Role / Timing Role: Precision excitation source for Wheatstone bridge, referenced to same ground as ADC for ratiometric accuracy. Use Value: 2ppm/°C tempco and 30ppm thermal hysteresis enable ±0.005% linearity over temperature without recalibration. |
| Medical Patient Monitoring | Precision Battery Monitors |
Use Scenario: ECG front-end analog signal chain requiring stable reference for programmable gain amplifier and anti-aliasing filter. IC Role / Device Role / Timing Role: Low-noise voltage reference for biasing and scaling analog signal path components. Use Value: 750nVP-P (0.1–10Hz) noise prevents obscuring 10µV cardiac signals during long-duration monitoring. | Use Scenario: Fuel gauge IC in industrial handheld device using Li-ion battery pack with 3.0–4.2V range. IC Role / Device Role / Timing Role: Reference for ADC measuring cell voltage and current shunt - enables accurate state-of-charge calculation. Use Value: ±0.05% initial accuracy and 500mV dropout allow direct use from battery without intermediate regulator, reducing BOM count. |
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, 0.05% initial accuracy, 3ppm/°C max, 0.4ppmP-P noise, SOIC-8 package | Higher noise and tempco; no dual-output sensing | Lower-cost option where Kelvin sensing is unnecessary and 0.4ppm noise is acceptable. |
| ADR4530BRZ | 3.0V, 0.02% initial accuracy, 2ppm/°C max, 0.2ppmP-P noise, SOIC-8, no VOUT_S pin | Superior accuracy/noise but lacks remote sensing - requires careful layout to minimize trace error | Preferred when ultimate noise performance is required and board layout permits tight component placement. |
Compared with REF5030IDR and ADR4530BRZ, the LTC6655CHMS8-3#TRPBF uniquely combines Kelvin sensing, guaranteed 125°C operation, and industry-leading 0.25ppmP-P noise in a compact MSOP - making it optimal for space-constrained, high-accuracy applications where trace resistance cannot be ignored.
Availability
LTC6655CHMS8-3#TRPBF is available at Aetrix Electronics and suitable for high-resolution data acquisition systems, weigh scales, medical patient monitors, and precision battery monitors requiring stable component supply across extended temperature ranges.
Supply support for LTC6655CHMS8-3#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. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, communications, automotive, and healthcare markets.
The LTC6655 product line delivers ultra-precision voltage references with sub-ppm noise and drift for metrology-grade instrumentation, test equipment, and safety-critical embedded systems demanding long-term stability.
FAQ
What is the maximum operating temperature for the LTC6655CHMS8-3#TRPBF?
The LTC6655CHMS8-3#TRPBF is fully specified and 100% tested over –40°C to 125°C. Its MSOP package has a maximum junction temperature of 150°C, and thermal resistance θJA is 300°C/W - enabling reliable operation in under-hood automotive or industrial control cabinet environments where ambient temperatures approach 105°C.
Does the LTC6655CHMS8-3#TRPBF require an external capacitor on the VOUT_S pin?
No, the LTC6655CHMS8-3#TRPBF does not require an external capacitor on VOUT_S. This pin sinks a fixed 2mA sense current and must be connected directly to the load-side ground or reference node via a low-impedance trace. Adding capacitance here would destabilize the feedback loop and degrade load regulation performance.
Can the LTC6655CHMS8-3#TRPBF be used with a 3.3V supply rail?
Yes, the LTC6655CHMS8-3#TRPBF can operate from a 3.3V supply: its minimum input voltage is VOUT + 0.5V = 3.5V, so a 3.3V rail is insufficient. However, a 3.6V or higher regulated supply - such as a 3.8V LDO output - meets the 500mV dropout requirement and ensures full specification compliance across temperature and load.
How does the dual-output (VOUT_F/VOUT_S) architecture improve accuracy in the LTC6655CHMS8-3#TRPBF?
The LTC6655CHMS8-3#TRPBF uses VOUT_F to deliver current to the load while VOUT_S senses voltage at the remote load point. Since VOUT_S sinks 2mA, any voltage drop across PCB traces (e.g., 50mΩ × 2mA = 100µV) is actively corrected by the internal amplifier - effectively eliminating trace resistance error and achieving true 4-wire reference accuracy without external components.
Is the LTC6655CHMS8-3#TRPBF pin-compatible with earlier LTC6655 variants like the B-grade?
Yes, the LTC6655CHMS8-3#TRPBF is pin-compatible with all LTC6655xHMS8-3 variants (e.g., LTC6655BHMS8-3#TRPBF) in the same MSOP package. Both share identical pinout, footprint, and electrical interface - differing only in initial accuracy (±0.05% C-grade vs ±0.025% B-grade) and temperature coefficient (2ppm/°C vs 1ppm/°C), allowing direct upgrade in existing designs.
LTC6655CHMS8-3#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:
- 5 mA
- Tolerance:
- ±0.05%
- Temperature Coefficient:
- 5ppm/°C
- Noise - 0.1Hz to 10Hz:
- 0.25ppmp-p
- Noise - 10Hz to 10kHz:
- 0.67ppmrms
- Voltage - Input:
- 13.2V
- Current - Supply:
- 7.5mA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
LTC6655CHMS8-3#TRPBF FAQ
1.How can I place an order for LTC6655CHMS8-3#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6655CHMS8-3#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 LTC6655CHMS8-3#TRPBF reliable?
The price and inventory of LTC6655CHMS8-3#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6655CHMS8-3#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC6655CHMS8-3#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6655CHMS8-3#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6655CHMS8-3#TRPBF?
LTC6655CHMS8-3#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6655CHMS8-3#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 LTC6655CHMS8-3#TRPBF?
For technical support, including LTC6655CHMS8-3#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6655CHMS8-3#TRPBF requirements.
6.How does Aetrix verify that LTC6655CHMS8-3#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC6655CHMS8-3#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 LTC6655CHMS8-3#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC6655CHMS8-3#TRPBF?
All LTC6655CHMS8-3#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6655CHMS8-3#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 LTC6655CHMS8-3#TRPBF part is unused and in its original packaging.
Return procedure for LTC6655CHMS8-3#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC6655CHMS8-3#TRPBF Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
-
LM4040CYM3-2.5-TR
Microchip Technology
-
LM4040CYM3-4.1-TR
Microchip Technology
-
LM4040EIM3-2.5/NOPB
Texas Instruments
-
AZ431LBNTR-G1
Diodes Incorporated
-
LM4040D20IDBZR
Texas Instruments
-
LM4041DIM3-ADJ/NOPB
Texas Instruments
-
LM4040DIM3X-2.5/NOPB
Texas Instruments
-
LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
