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Analog Devices Inc. LT6654AHS6-1.25#TRMPBF
- Part No.:
- LT6654AHS6-1.25#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LT6654AHS6-1.25#TRMPBF.pdf
- Description:
- IC VREF SERIES 0.05% TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,171
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Product details
Overview
LT6654AHS6-1.25#TRMPBF from Analog Devices is a precision 1.25V voltage reference IC with ±0.05% initial accuracy, 10ppm/°C max temperature drift, and 1.6ppmP-P (0.1Hz–10Hz) low-noise output. It delivers ±10mA output drive in a 6-lead TSOT-23 package, operates from 2.4V to 36V input, and is fully specified over –40°C to 125°C for automotive and high-reliability industrial sensing.
For engineers reviewing the LT6654AHS6-1.25#TRMPBF datasheet, LT6654AHS6-1.25#TRMPBF pinout, LT6654AHS6-1.25#TRMPBF application, or LT6654AHS6-1.25#TRMPBF equivalent, this part supports high-resolution ADC/DAC biasing, precision regulator feedback, and sensor excitation where tight thermal stability and low noise are critical at extended temperature ranges.
Technical Context
The LT6654AHS6-1.25#TRMPBF uses curvature-compensated bandgap architecture with internal buffering to achieve low output impedance and precise load regulation. Its ability to both source and sink ±10mA enables bidirectional current operation-critical for negative reference configurations and active load compensation.
Designed for harsh environments, it features 15ppm thermal hysteresis (–40°C to 125°C), 5ppm/V line regulation up to 36V, and 8ppm/mA load regulation when sourcing 10mA-all validated across its full H-grade operating range without derating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.25V nominal; fixed, factory-trimmed value with no external adjustment required. |
| Initial Accuracy | ±0.05% max at 25°C; ensures ≤6.25mV absolute error in system-level calibration. |
| Temp Coefficient | 10ppm/°C max (–40°C to 125°C); contributes ≤1.25mV drift over full range. |
| Output Noise | 1.6ppmP-P (0.1Hz–10Hz); ≈2.0µVP-P, enabling <18-bit effective resolution in DC-coupled data acquisition. |
| Supply Range | 2.4V to 36V input; supports wide-input industrial rails and battery-backed systems down to 2.4V. |
| Output Drive | ±10mA sourcing/sinking; eliminates need for external buffers in 12-bit DAC reference or op-amp bias circuits. |
| Dropout Voltage | 100mV max at 10mA; allows operation with only 1.35V headroom above output, ideal for low-voltage systems. |
Pinout & Package
Package: 6-lead Plastic TSOT-23 (1mm height), RoHS-compliant, tape-and-reel (500 pcs).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (DNC) | Do Not Connect | Internally connected; external connection risks leakage current and accuracy degradation. |
| Pin 2 (NC) | No Connect | Not internally bonded; may be left floating or tied to GND/VIN/VOUT without impact. |
| Pin 3 (GND) | Internal Ground | Must be star-connected near Pin 4 to minimize ground loop errors in precision layouts. |
| Pin 4 (GND) | Primary Ground | Main device ground reference; all external grounds (load, bypass caps) must tie here. |
| Pin 5 (VOUT) | Reference Output | 1.25V regulated output; requires ≥1µF ceramic capacitor to GND for stability and noise suppression. |
| Pin 6 (VOUT) | Output Sense | Must be tied directly to Pin 5 to enable proper load regulation and eliminate trace IR drop effects. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional Output Drive | ±10mA capability enables use as positive or negative reference without external circuitry. |
| Extended Temperature Range | –40°C to 125°C operation with full spec compliance supports under-hood automotive and industrial control. |
| Low Thermal Hysteresis | 15ppm over –40°C to 125°C cycle; minimizes calibration drift after thermal cycling in field-deployed equipment. |
| High PSRR | –70dB typical at 100Hz; rejects ripple from noisy switch-mode supplies feeding precision analog front-ends. |
| Fast Turn-On Time | 150µs to 0.1% settling (1µF load); enables power-gated reference activation in low-power sensor nodes. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Pressure Transmitter |
|---|---|
Use Scenario: Providing stable 1.25V reference for ratiometric bridge sensor signal conditioning in diesel ECU ambient temperatures up to 125°C. IC Role / Device Role / Timing Role: Precision voltage reference for ADC input scaling and sensor excitation current generation. Use Value: 10ppm/°C drift ensures ≤0.15% total error contribution over engine thermal cycles, meeting ASIL-B functional safety requirements. | Use Scenario: Biasing 4–20mA transmitter circuitry in hazardous-area pressure sensors exposed to –40°C cold starts and 85°C process heat. IC Role / Device Role / Timing Role: Primary reference for DAC-controlled current loop regulation and on-board diagnostics calibration. Use Value: ±10mA drive eliminates external buffer, reducing BOM count while maintaining 16-bit linearity across temperature. |
| Medical Patient Monitor ADC | Test & Measurement Multimeter Front-End |
Use Scenario: Supplying reference voltage to 24-bit delta-sigma ADC in portable ECG/SpO₂ modules requiring ultra-low noise and long-term stability. IC Role / Device Role / Timing Role: Low-noise, low-drift reference for high-resolution analog-to-digital conversion of biopotential signals. Use Value: 1.6ppmP-P noise enables sub-µV measurement resolution; 60ppm/√kHr long-term drift supports 5-year calibration intervals. | Use Scenario: Serving as primary reference in handheld digital multimeters where accuracy must hold across battery voltage sag and environmental temperature swings. IC Role / Device Role / Timing Role: Master reference for auto-ranging voltage/current measurement paths and internal self-calibration routines. Use Value: 5ppm/V line regulation maintains accuracy even as alkaline batteries discharge from 3.2V to 2.4V, eliminating mid-battery recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF5012IDR | 1.2V output, ±0.05% initial accuracy, 3ppm/°C drift, SOIC-8 package | Lower drift but fixed 1.2V output; requires level-shifting for 1.25V system compatibility | Select if drift-critical applications prioritize 3ppm/°C over exact 1.25V match and board space permits SOIC-8. |
| ADR4512BKSZ-R2 | 1.2V output, ±0.02% initial accuracy, 2ppm/°C drift, SOT-23-5 package | Higher accuracy and lower drift, but 1.2V output and no sinking capability limits negative reference use | Choose when ultimate initial accuracy is required and system can accommodate 1.2V reference with unidirectional drive. |
Compared with REF5012IDR and ADR4512BKSZ-R2, the LT6654AHS6-1.25#TRMPBF uniquely delivers exact 1.25V output, bidirectional ±10mA drive, and guaranteed 10ppm/°C drift in a compact TSOT-23-making it optimal for ratiometric sensor interfaces and dual-polarity reference designs where pin-compatible alternatives do not exist.
Availability
LT6654AHS6-1.25#TRMPBF is available at Aetrix Electronics and suitable for automotive engine control units, industrial pressure transmitters, and medical patient monitor ADCs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT6654AHS6-1.25#TRMPBF 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LT6654 family was engineered for precision instrumentation and harsh-environment applications-delivering metrology-grade voltage references with robust thermal stability, low noise, and wide-supply operation in miniature packages.
FAQ
What is the maximum input voltage rating for LT6654AHS6-1.25#TRMPBF?
The LT6654AHS6-1.25#TRMPBF has an absolute maximum input voltage of 38V relative to GND. However, its specified operating range extends from 2.4V to 36V, with full electrical performance-including line regulation and dropout-guaranteed across that span. Operation above 36V is not recommended for reliable long-term performance.
Does LT6654AHS6-1.25#TRMPBF require an output capacitor, and what value is recommended?
Yes, the LT6654AHS6-1.25#TRMPBF requires a minimum 1µF ceramic output capacitor connected between VOUT and GND for stability. The datasheet specifies 1µF as optimal for settling time and noise suppression; larger values (e.g., 10µF) are acceptable but increase turn-on time to 150µs. This capacitor must be placed close to Pins 5 and 6 per layout guidelines.
Can LT6654AHS6-1.25#TRMPBF be used as a negative voltage reference?
Yes, the LT6654AHS6-1.25#TRMPBF can operate as a negative reference by sinking current-its ±10mA bidirectional capability allows it to function with the same precision in inverted configurations. When sinking, the device maintains ±0.05% accuracy and 10ppm/°C drift, provided the input voltage remains within 2.4V to 36V and thermal design accommodates power dissipation.
What is the long-term drift specification for LT6654AHS6-1.25#TRMPBF?
The LT6654AHS6-1.25#TRMPBF exhibits 60ppm/√kHr long-term drift in the TSOT-23 package. This logarithmic aging behavior means approximately 60ppm shift occurs in the first 1000 hours, with diminishing drift thereafter-typically less than one-third in the second 1000 hours. This value is measured under standard conditions and applies across the full –40°C to 125°C operating range.
Is LT6654AHS6-1.25#TRMPBF AEC-Q100 qualified?
Yes, the LT6654AHS6-1.25#TRMPBF is AEC-Q100 qualified for automotive applications. It belongs to the H-grade variant (–40°C to 125°C) and meets stress test requirements for temperature cycling, humidity, and reliability per AEC-Q100 Rev H. Automotive-grade ordering codes include the #W suffix (e.g., LT6654AHS6-1.25#WTRMPBF), but the standard #TRMPBF version shares identical die and qualification.
LT6654AHS6-1.25#TRMPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 1.25V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.05%
- Temperature Coefficient:
- 10ppm/°C
- Noise - 0.1Hz to 10Hz:
- 0.8ppmp-p
- Noise - 10Hz to 10kHz:
- 2ppmrms
- Voltage - Input:
- 2.4V ~ 36V
- Current - Supply:
- 600µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-6
LT6654AHS6-1.25#TRMPBF FAQ
1.How can I place an order for LT6654AHS6-1.25#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT6654AHS6-1.25#TRMPBF 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 LT6654AHS6-1.25#TRMPBF reliable?
The price and inventory of LT6654AHS6-1.25#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT6654AHS6-1.25#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT6654AHS6-1.25#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT6654AHS6-1.25#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT6654AHS6-1.25#TRMPBF?
LT6654AHS6-1.25#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT6654AHS6-1.25#TRMPBF 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 LT6654AHS6-1.25#TRMPBF?
For technical support, including LT6654AHS6-1.25#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT6654AHS6-1.25#TRMPBF requirements.
6.How does Aetrix verify that LT6654AHS6-1.25#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT6654AHS6-1.25#TRMPBF 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 LT6654AHS6-1.25#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT6654AHS6-1.25#TRMPBF?
All LT6654AHS6-1.25#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT6654AHS6-1.25#TRMPBF, 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 LT6654AHS6-1.25#TRMPBF part is unused and in its original packaging.
Return procedure for LT6654AHS6-1.25#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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