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Analog Devices Inc. LT6656AIDC-2.5#TRMPBF
- Part No.:
- LT6656AIDC-2.5#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 6-WFDFN Exposed Pad
- Datasheet:
-
LT6656AIDC-2.5#TRMPBF.pdf
- Description:
- IC VREF SERIES 0.1% 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,168
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Product details
Overview
LT6656AIDC-2.5#TRMPBF from Analog Devices is a precision series voltage reference IC delivering 2.500V output with ±0.05% initial accuracy, 10ppm/°C max temperature drift, and ultralow 850nA supply current. It operates with dropout as low as 10mV and supports up to 5mA output drive, making it ideal for battery-powered instrumentation, portable gas monitors, and micropower ADC/DAC reference and supply applications.
For engineers reviewing the LT6656AIDC-2.5#TRMPBF datasheet, LT6656AIDC-2.5#TRMPBF pinout, LT6656AIDC-2.5#TRMPBF application, or LT6656AIDC-2.5#TRMPBF equivalent, key selection criteria include guaranteed –40°C to 85°C industrial temperature operation, DFN-6 (2mm × 2mm) package with exposed pad, 1µF minimum stable output capacitance, and reverse input/output protection.
Technical Context
The LT6656AIDC-2.5#TRMPBF uses a bandgap-based error amplifier architecture with class-B output stage, enabling both sourcing and sinking capability for transient recovery. Its design achieves <10ppm/°C drift via advanced processing and packaging, with hysteresis limited to 70ppm over –40°C to 85°C.
It features integrated reverse polarity protection on both VIN and VOUT terminals, operates stably with 1µF–47µF output capacitors of any ESR ≤5Ω, and maintains regulation down to 10mV headroom-enabling use in ultra-low-voltage systems where supply margin is constrained.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±0.05% (±1.25mV) at 25°C - enables direct interface with 12-bit+ SAR ADCs without trimming |
| Temp Coefficient | 10ppm/°C max (–40°C to 85°C) - contributes ≤±250ppm (±0.625mV) error across full industrial range |
| Supply Current | 850nA typical, 1.5µA max - draws <1µW at 2.5V, extending multi-year battery life in remote sensors |
| Dropout Voltage | 10mV max at zero load - allows operation from 2.51V supply, critical for single-cell Li-ion or coin-cell systems |
| Output Drive | 5mA sourcing min - sufficient to power ADC reference input and internal LDO simultaneously |
| Load Regulation | 65ppm/mA - introduces only ±325ppm (±0.81mV) shift from 0 to 5mA load, preserving measurement fidelity |
| Noise (0.1–10Hz) | 30ppmP-P (75µVRMS) - sub-20µV peak-to-peak noise avoids quantization errors in high-resolution data acquisition |
Pinout & Package
LT6656AIDC-2.5#TRMPBF is housed in a 6-lead (2mm × 2mm) plastic DFN package with exposed thermal pad (Pin 7), rated for –40°C to 85°C operation. The package requires soldering the exposed pad to PCB ground for thermal and electrical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND* (Pin 1) | Internal ground reference | Must be connected to system ground; not optional - ties internal bias network |
| GND (Pin 2) | Device ground return | Main ground path for output current and internal circuitry; low-impedance connection required |
| NC (Pin 3) | No internal connection | May be left floating or tied to GND/VIN/VOUT; no functional impact |
| VIN (Pin 6) | Power supply input | Accepts 2.51V–18V; requires 0.1µF bypass capacitor within 1 inch |
| VOUT (Pin 4) | Precision 2.5V output | Delivers regulated voltage; requires ≥1µF output capacitor (ceramic/tantalum/electrolytic) |
| Exposed Pad (Pin 7) | Thermal & electrical ground | Mandatory connection to PCB ground plane for thermal dissipation and noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow supply current | 850nA enables >10-year battery life in 10µA-average IoT sensor nodes |
| Low dropout voltage | 10mV headroom allows direct use with single 2.55V LiFePO₄ cell or energy-harvesting sources |
| Reverse input/output protection | Withstands –18V on VIN or +18V on VOUT - eliminates need for external diodes in ruggedized designs |
| Stable with wide ESR capacitors | Operates reliably with 0–5Ω ESR output caps - supports low-cost bulk tantalum or polymer capacitors |
| Industrial temperature grade | Guaranteed performance from –40°C to 85°C - qualified for outdoor environmental monitoring hardware |
Applications
| Portable Gas Monitor | Precision ADC Reference |
|---|---|
Use Scenario: Battery-powered handheld CO/H₂S detector with electrochemical sensor and 16-bit sigma-delta ADC. IC Role / Device Role / Timing Role: Provides stable 2.5V reference and supplies bias voltage to sensor conditioning circuitry. Use Value: 10ppm/°C drift ensures <±0.5% full-scale error across operating temperature; 850nA current extends 2xAA battery life to >3 years. | Use Scenario: Low-power data logger acquiring thermocouple and RTD signals using a 24-bit ADC. IC Role / Device Role / Timing Role: Serves as both reference voltage and analog supply rail for ADC's internal LDO and buffer amplifiers. Use Value: 65ppm/mA load regulation prevents gain error when ADC switches between channels; 30ppmP-P noise avoids LSB dither in DC measurements. |
| Micropower Remote Sensor Node | Battery-Supplied Precision Regulator |
Use Scenario: Solar-charged soil moisture sensor node transmitting hourly via LoRaWAN. IC Role / Device Role / Timing Role: Generates precise 2.5V rail for MCU, RF transceiver, and analog front-end from variable solar input. Use Value: 2.51V minimum input enables operation during low-light conditions; reverse protection prevents damage during panel disconnect events. | Use Scenario: Medical wearable measuring bioimpedance with sub-µA standby current budget. IC Role / Device Role / Timing Role: Acts as ultra-low-quiescent regulator supplying 2.5V to analog signal chain while rejecting supply ripple. Use Value: 80dB PSRR at 10Hz suppresses switching noise from PMIC; 1µF output cap fits tight board space without compromising stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3425RTET | 2.5V, 0.05% initial accuracy, 12ppm/°C drift, 950nA supply current, SOT-23-6 package | Higher drift and supply current; no reverse protection; requires ≥2.55V input | Lower cost alternative where 12ppm/°C drift and absence of reverse protection are acceptable |
| ADR3425ARJZ-R7 | 2.5V, 0.1% initial accuracy, 10ppm/°C drift, 3.5µA supply current, SOT-23-5 package | Higher quiescent current; no reverse protection; 150mV dropout limits low-voltage use | Suitable for non-battery applications needing same drift but tolerating higher power and larger dropout |
Compared with REF3425RTET and ADR3425ARJZ-R7, the LT6656AIDC-2.5#TRMPBF delivers superior low-power performance (850nA vs ≥950nA), guaranteed reverse protection, and 10mV dropout - making it uniquely suited for long-life, single-cell, and fault-tolerant instrumentation.
Availability
LT6656AIDC-2.5#TRMPBF is available at Aetrix Electronics and suitable for portable gas monitors, battery-powered data loggers, and micropower remote sensing applications requiring stable component supply, guaranteed industrial temperature performance, and long-term parametric consistency.
Supply support for LT6656AIDC-2.5#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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, communications, automotive, and healthcare markets.
The LT6656 product line delivers ultralow-power, high-accuracy series voltage references optimized for battery-operated instrumentation, precision sensor interfaces, and portable medical devices demanding long-term stability and robustness.
FAQ
What is the minimum input voltage required for stable operation of the LT6656AIDC-2.5#TRMPBF?
The LT6656AIDC-2.5#TRMPBF requires a minimum input voltage of 2.51V at zero load (10mV dropout) and up to 2.87V at 5mA load (370mV dropout), per the Electrical Characteristics table. Operation below these thresholds risks output regulation loss and increased drift. Input must remain within absolute maximum ratings (±20V).
Does the LT6656AIDC-2.5#TRMPBF require an external output capacitor, and what type is recommended?
Yes, the LT6656AIDC-2.5#TRMPBF requires a minimum 1µF output capacitor for stability. It is designed to operate with ceramic, tantalum, or electrolytic capacitors having ESR ≤5Ω. No series resistor or special layout is needed - the device's low ESR sensitivity simplifies design and reduces BOM count.
How does the LT6656AIDC-2.5#TRMPBF handle reverse voltage conditions on VIN or VOUT?
The LT6656AIDC-2.5#TRMPBF includes built-in reverse protection: it withstands –18V on VIN (with 80µA reverse leakage) and +18V on VOUT (with 30µA reverse current). This eliminates the need for external blocking diodes in field-deployed equipment subject to wiring faults or battery reversal.
What is the long-term stability specification for the LT6656AIDC-2.5#TRMPBF, and how is it measured?
The LT6656AIDC-2.5#TRMPBF exhibits 15ppm/√kHr long-term drift in the DFN package (per Note 9), meaning ~15ppm drift after 1,000 hours, ~21ppm after 2,000 hours, and diminishing thereafter. This value is derived from accelerated aging tests under controlled thermal and bias conditions, not extrapolated from short-term data.
Can the LT6656AIDC-2.5#TRMPBF be used to supply both reference and power rails for a low-power ADC?
Yes - the LT6656AIDC-2.5#TRMPBF is explicitly designed for this dual role. It delivers 2.5V at up to 5mA while maintaining 65ppm/mA load regulation and 10ppm/°C drift. Its 850nA quiescent current ensures minimal impact on system power budget when the ADC is idle.
LT6656AIDC-2.5#TRMPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 6-WFDFN Exposed Pad
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 5 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 10ppm/°C
- Noise - 0.1Hz to 10Hz:
- 30ppmp-p
- Noise - 10Hz to 10kHz:
- 80µVrms
- Voltage - Input:
- 3V ~ 18V
- Current - Supply:
- 1.5µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-DFN (2x2)
LT6656AIDC-2.5#TRMPBF FAQ
1.How can I place an order for LT6656AIDC-2.5#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT6656AIDC-2.5#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 LT6656AIDC-2.5#TRMPBF reliable?
The price and inventory of LT6656AIDC-2.5#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT6656AIDC-2.5#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT6656AIDC-2.5#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT6656AIDC-2.5#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT6656AIDC-2.5#TRMPBF?
LT6656AIDC-2.5#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT6656AIDC-2.5#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 LT6656AIDC-2.5#TRMPBF?
For technical support, including LT6656AIDC-2.5#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT6656AIDC-2.5#TRMPBF requirements.
6.How does Aetrix verify that LT6656AIDC-2.5#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT6656AIDC-2.5#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 LT6656AIDC-2.5#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT6656AIDC-2.5#TRMPBF?
All LT6656AIDC-2.5#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT6656AIDC-2.5#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 LT6656AIDC-2.5#TRMPBF part is unused and in its original packaging.
Return procedure for LT6656AIDC-2.5#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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