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Analog Devices Inc. LTC6655CHMS8-2.048#TRPBF
- Part No.:
- LTC6655CHMS8-2.048#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC6655CHMS8-2.048#TRPBF.pdf
- Description:
- IC VREF SERIES 0.05% 8MSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LTC6655CHMS8-2.048#TRPBF from Analog Devices is a precision bandgap voltage reference delivering 2.048V output with ±0.025% initial accuracy, 2ppm/°C max temperature coefficient, and 0.25ppmP-P (0.1Hz–10Hz) low-frequency noise. It operates from 3V to 13.2V supply, sinks/sources ±5mA, and is specified over –40°C to 125°C for high-resolution data acquisition and industrial instrumentation.
For engineers reviewing the LTC6655CHMS8-2.048#TRPBF datasheet, LTC6655CHMS8-2.048#TRPBF pinout, LTC6655CHMS8-2.048#TRPBF application, or LTC6655CHMS8-2.048#TRPBF equivalent, this page provides verified specifications, MSOP-8 pin functions, load regulation behavior, noise-reduction design guidance, and validated alternative options for precision analog systems.
Technical Context
The LTC6655CHMS8-2.048#TRPBF uses advanced curvature-compensated bandgap architecture to achieve predictable, monotonic temperature drift ≤2ppm/°C and long-term stability of 60ppm/√kHr in MSOP-8 packaging. Its dual-output topology (VOUT_F and VOUT_S) enables Kelvin sensing for <10ppm/mA load regulation under sourcing/sinking conditions.
Unlike the LTC6655LN variant, this C-grade part lacks the NR (noise reduction) pin and instead features separate force (VOUT_F) and sense (VOUT_S) outputs - enabling precise remote-sense compensation without external filtering components. Shutdown current is <20µA with active-low SHDN control referenced to VIN.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048V ±0.025% (±512µV) at 25°C - enables direct interface with 12-bit SAR ADCs without gain calibration. |
| Tempco | ≤2ppm/°C max (–40°C to 125°C) - ensures <248ppm total drift across full range, critical for uncalibrated field instruments. |
| Low-Freq Noise | 0.25ppmP-P (0.1Hz–10Hz), equivalent to 512nVP-P - supports 20+ bit effective resolution in precision weigh scales. |
| Load Regulation | <10ppm/mA (sourcing), <30ppm/mA (sinking) - maintains accuracy despite ±5mA load variation in battery monitor feedback loops. |
| Dropout Voltage | 500mV min headroom (VIN ≥ 2.548V) - allows operation from single Li-ion cells or low-headroom LDOs. |
| Supply Range | 3V to 13.2V - compatible with 3.3V, 5V, and 12V industrial rails without external regulators. |
| Shutdown Current | <20µA - enables µA-level power budgeting in portable medical sensors during sleep mode. |
Pinout & Package
Package: 8-lead plastic MSOP (MS8), 3mm × 3mm, 0.65mm pitch, thermal pad optional. Pin 4 is primary ground star point; all GND pins (3, 4, 5, 8) must be connected to low-impedance ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SHDN | Active-low shutdown control | Pull to GND for <20µA quiescent mode; internal pull-up to VIN ensures default-on operation if left floating. |
| 2 - VIN | Power input | Requires ≥0.1µF ceramic bypass capacitor to GND; accepts 3V–13.2V with 500mV dropout margin. |
| 3, 5, 8 - GND | Ground terminals | Internal ground connections; must be tied to same low-noise ground as Pin 4 to minimize PSRR degradation. |
| 4 - GND | Main ground reference | Star grounding point for all GND pins and external capacitors; routing directly to PCB ground plane minimizes thermal EMF errors. |
| 6 - VOUT_S | Sense input | Connects to load-side ground to compensate trace resistance; sinks fixed 2mA - error = Rtrace × 2mA. |
| 7 - VOUT_F | Force output | Delivers regulated 2.048V; sources/sinks ±5mA; requires 2.7µF–100µF low-ESR output capacitor for stability. |
Key Features
| Feature | Design Value |
|---|---|
| 0.25ppmP-P low-frequency noise | Enables sub-1µV offset stability in 24-bit delta-sigma ADC front-ends without post-calibration. |
| Separate force/sense outputs | Eliminates voltage drop error from PCB traces up to 25mΩ - critical for remote sensor conditioning circuits. |
| –40°C to 125°C full-range spec | Validated performance across automotive under-hood and industrial PLC environments without derating. |
| ±5mA source/sink capability | Directly drives ADC reference inputs, op-amp bias networks, and DAC reference buffers without external buffers. |
| 2ppm/°C max tempco | Reduces system-level temperature compensation complexity - one-point calibration suffices for many applications. |
Applications
| High-Resolution Data Acquisition | Weigh Scales |
|---|---|
|
Use Scenario: 24-bit delta-sigma ADC in portable environmental sensor node measuring ppm-level gas concentration. IC Role / Device Role / Timing Role: Primary voltage reference for ADC conversion, providing stable 2.048V reference with minimal drift-induced measurement drift. Use Value: 0.25ppmP-P noise and 2ppm/°C tempco ensure <1LSB error over temperature and time, eliminating field recalibration. |
Use Scenario: Platform scale with strain-gauge bridge and 20-bit ADC for pharmaceutical dispensing. IC Role / Device Role / Timing Role: Reference for bridge amplifier and ADC, rejecting common-mode supply ripple via >110dB PSRR. Use Value: Dual force/sense outputs compensate for 50mV drop across 25cm PCB traces, maintaining ±0.001% linearity. |
| Precision Battery Monitors | Medical Equipment |
|
Use Scenario: Li-ion pack monitor IC measuring cell voltages with ±1mV accuracy over –20°C to 60°C. IC Role / Device Role / Timing Role: Stable reference for internal ADC and comparator thresholds in battery fuel gauging ASIC. Use Value: 60ppm/√kHr long-term drift ensures <0.1% SoC error accumulation over 5-year product lifetime. |
Use Scenario: Portable ECG amplifier requiring DC-coupled baseline stability within ±5µV over 8-hour clinical session. IC Role / Device Role / Timing Role: Reference for programmable gain instrumentation amplifier and anti-alias filter. Use Value: <20µA shutdown current extends battery life in emergency transport mode without sacrificing wake-up accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF5020IDR | 2.048V, ±0.05% initial accuracy, 3ppm/°C max, 0.35ppmP-P noise, SOIC-8 package | Higher initial error and noise; no force/sense outputs; lower PSRR (105dB vs 120dB) | Acceptable where cost sensitivity outweighs 0.025% accuracy and remote sensing needs. |
| LTC6655BHMS8-2.048#TRPBF | Same package and pinout; tighter 1ppm/°C max tempco and ±0.025% accuracy maintained over –40°C to 125°C | Identical use cases but with enhanced stability for metrology-grade calibration equipment | Select when system-level drift budget requires <124ppm total over temperature (vs 248ppm for C-grade). |
Compared with REF5020IDR and LTC6655BHMS8-2.048#TRPBF, the LTC6655CHMS8-2.048#TRPBF offers optimal balance of ultra-low noise, force/sense architecture, and industrial temperature range at mid-tier cost - making it ideal for high-volume test equipment and embedded DAQ where B-grade performance is unnecessary.
Availability
LTC6655CHMS8-2.048#TRPBF is available at Aetrix Electronics and suitable for high-resolution data acquisition systems, precision battery monitors, and medical instrumentation requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for LTC6655CHMS8-2.048#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 semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control.
The LTC6655 family was designed specifically for applications demanding ultra-low noise, low drift, and high accuracy in harsh environments - targeting instrumentation, industrial automation, and medical diagnostics where reference stability directly determines system-level measurement fidelity.
FAQ
What is the maximum operating temperature for the LTC6655CHMS8-2.048#TRPBF?
The LTC6655CHMS8-2.048#TRPBF is fully specified from –40°C to +125°C ambient temperature, with electrical characteristics guaranteed across this range. Junction temperature must not exceed 150°C, and thermal design should account for θJA = 300°C/W in the MSOP-8 package. Derating is not required within the specified ambient range.
Does the LTC6655CHMS8-2.048#TRPBF support remote sensing?
Yes - the LTC6655CHMS8-2.048#TRPBF implements true Kelvin sensing via dedicated VOUT_S (Pin 6) and VOUT_F (Pin 7) pins. VOUT_S sinks a fixed 2mA current, allowing trace resistance error (Rtrace × 2mA) to be canceled. This configuration maintains output accuracy even with PCB trace resistances up to 25mΩ.
What output capacitor value is recommended for the LTC6655CHMS8-2.048#TRPBF?
An output capacitor between 2.7µF and 100µF is required for stability, with ESR ≤ 0.1Ω at 100kHz. Ceramic X7R types are acceptable for most applications, but film capacitors (e.g., polypropylene or PPS) are preferred in ultra-low-noise designs to avoid piezoelectric artifacts. The LTC6655CHMS8-2.048#TRPBF does not include a noise reduction (NR) pin.
How does the LTC6655CHMS8-2.048#TRPBF differ from the LTC6655LN variant?
The LTC6655CHMS8-2.048#TRPBF lacks the NR (noise reduction) pin and instead provides separate VOUT_S/VOUT_F outputs for remote sensing. The LTC6655LN variants replace VOUT_S with NR and offer lower 0.12ppmP-P noise (with 100µF NR cap), but sacrifice force/sense capability. Both share the same ±0.025% accuracy and 2ppm/°C tempco.
Can the LTC6655CHMS8-2.048#TRPBF operate from a 3.3V supply?
Yes - the minimum supply voltage is 3V (VOUT + 0.952V), well within standard 3.3V rail margins. At 3.3V input, headroom is 1.252V, ensuring robust operation even with 5% rail tolerance and PCB drop. Supply current remains 5–7mA across 3V–13.2V, with no performance degradation.
LTC6655CHMS8-2.048#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):
- 2.048V
- 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
LTC6655CHMS8-2.048#TRPBF FAQ
1.How can I place an order for LTC6655CHMS8-2.048#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6655CHMS8-2.048#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 LTC6655CHMS8-2.048#TRPBF reliable?
The price and inventory of LTC6655CHMS8-2.048#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6655CHMS8-2.048#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC6655CHMS8-2.048#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6655CHMS8-2.048#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6655CHMS8-2.048#TRPBF?
LTC6655CHMS8-2.048#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6655CHMS8-2.048#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 LTC6655CHMS8-2.048#TRPBF?
For technical support, including LTC6655CHMS8-2.048#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6655CHMS8-2.048#TRPBF requirements.
6.How does Aetrix verify that LTC6655CHMS8-2.048#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC6655CHMS8-2.048#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 LTC6655CHMS8-2.048#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC6655CHMS8-2.048#TRPBF?
All LTC6655CHMS8-2.048#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6655CHMS8-2.048#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 LTC6655CHMS8-2.048#TRPBF part is unused and in its original packaging.
Return procedure for LTC6655CHMS8-2.048#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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