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Analog Devices Inc. LT6658AHDE-2.5#TRPBF
- Part No.:
- LT6658AHDE-2.5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 16-WFDFN Exposed Pad
- Datasheet:
-
LT6658AHDE-2.5#TRPBF.pdf
- Description:
- IC VREF SERIES 6V 0.05% 16DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,330
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Product details
Overview
LT6658AHDE-2.5#TRPBF from Analog Devices is a precision dual-output voltage reference and regulator (Refulator™) delivering two independent, tightly tracking 2.5V outputs - Output 1 (150mA source/20mA sink) and Output 2 (50mA source/20mA sink) - with ±0.05% initial accuracy, 10ppm/°C max temperature drift, and 1.5ppmP–P (0.1Hz–10Hz) low noise. It powers high-resolution ADC/DAC reference inputs and microcontrollers in data acquisition systems.
For engineers reviewing the LT6658AHDE-2.5#TRPBF datasheet, LT6658AHDE-2.5#TRPBF pinout, LT6658AHDE-2.5#TRPBF application, or LT6658AHDE-2.5#TRPBF equivalent, key selection criteria include dual-output tracking performance, Kelvin-sense load regulation (0.25µV/mA), H-grade operation to 125°C, DFN package thermal resistance (θJA = 43°C/W), and separate supply pins for output isolation.
Technical Context
The LT6658AHDE-2.5#TRPBF integrates two independent buffer amplifiers with dedicated VIN1/VIN2 supply inputs, enabling power domain isolation and reduced system-wide supply current. Each output features Kelvin sense (VOUTx_S/VOUTx_F) for precision load regulation and includes internal short-circuit and thermal shutdown protection.
It employs a proprietary Refulator architecture combining bandgap reference stability with linear regulator drive capability, supporting adjustable outputs up to 6V via external resistors while maintaining matched drift and accuracy between outputs across –40°C to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5V per channel, factory-trimmed and matched for tracking applications |
| Initial Accuracy | ±0.05% max - enables 16-bit+ system accuracy without calibration |
| Temp Coefficient | 10ppm/°C max - ensures ≤25ppm total drift over –40°C to +125°C |
| Load Regulation | 0.25µV/mA (Output 1 sourcing) - supports stable reference under dynamic load |
| Output Noise | 1.5ppmP–P (0.1Hz–10Hz) - critical for high-SNR precision measurement |
| Supply Range | Up to 36V input - accommodates wide industrial and automotive supply rails |
| Operating Temp | –40°C to +125°C (H-grade) - qualified for under-hood and industrial control |
Pinout & Package
LT6658AHDE-2.5#TRPBF is housed in a 16-lead (4mm × 3mm) plastic DFN package with exposed pad (Pin 17 = GND), optimized for thermal management (θJC = 5°C/W, θJA = 43°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1,2,6,17) | Ground reference | Multiple GND pins reduce ground impedance; exposed pad must be soldered for thermal and electrical integrity |
| VOUT1_F / VOUT2_F | Main output force terminals | Drive loads directly; require ≥1µF output capacitance for stability |
| VOUT1_S / VOUT2_S | Kelvin sense inputs | Enable remote sensing to cancel PCB trace IR drop - essential for <0.25µV/mA regulation |
| VIN1 / VIN2 | Independent supply inputs | Allow isolation of output domains; each regulates independently from its own supply rail |
| VIN | Primary supply input | Bias internal circuitry; must be ≥VOUT + 2.5V for proper dropout margin |
| BYPASS | Noise reduction filter | Connects to NR pin via capacitor to lower integrated noise bandwidth |
| NR | Noise reduction node | External capacitor sets noise filter corner; enables <1.5ppmP–P performance |
| OD | Output disable control | Active-low logic input; pulls both outputs to ~400mV when asserted |
Key Features
| Feature | Design Value |
|---|---|
| Dual-output tracking | Output 1 and Output 2 track within 0.9µV/°C - eliminates differential drift in ratiometric systems |
| Kelvin-sense regulation | 0.25µV/mA load regulation enables sub-ppm reference stability even with 150mA Output 1 loading |
| Separate supply domains | VIN1/VIN2 independence allows powering Output 1 from noisy digital rail and Output 2 from clean analog rail |
| H-grade temperature range | Specified from –40°C to +125°C junction - supports automotive engine control and industrial PLC modules |
| Noise reduction pin (NR) | External capacitor on NR pin reduces 0.1Hz–10Hz noise to 1.5ppmP–P, meeting metrology-grade requirements |
Applications
| High-Resolution Data Acquisition | Automotive Sensor Signal Conditioning |
|---|---|
Use Scenario: Simultaneous sampling of multiple sensor channels (e.g., strain gauges, thermocouples) using a 24-bit delta-sigma ADC. IC Role / Device Role / Timing Role: LT6658AHDE-2.5#TRPBF supplies matched 2.5V references to ADC REF+ and REF– inputs while powering the ADC's digital core and external op-amps. Use Value: Dual-output tracking minimizes gain error drift; Kelvin sensing maintains reference accuracy despite PCB copper resistance under full load. | Use Scenario: Engine control unit (ECU) measuring exhaust gas oxygen (EGO) and intake air temperature with high linearity. IC Role / Device Role / Timing Role: LT6658AHDE-2.5#TRPBF provides stable 2.5V reference for analog front-end ADCs and powers the ECU's microcontroller and CAN transceiver LDO. Use Value: H-grade operation ensures specification compliance at 125°C junction; separate VIN1/VIN2 isolates noisy MCU supply from precision analog reference path. |
| Portable Precision Instrumentation | Industrial Process Controller |
Use Scenario: Battery-powered handheld multimeter requiring 6½-digit DCV accuracy and low self-heating. IC Role / Device Role / Timing Role: LT6658AHDE-2.5#TRPBF delivers ultra-low-noise 2.5V reference to integrating ADC and powers the display driver and communication IC. Use Value: 1.5ppmP–P noise and 10ppm/°C drift enable true 6½-digit resolution; low quiescent current (1.9mA typ.) extends battery life. | Use Scenario: DIN-rail mounted PLC module converting 4–20mA field signals with 0.1% system accuracy over ambient –25°C to +70°C. IC Role / Device Role / Timing Role: LT6658AHDE-2.5#TRPBF supplies reference to isolated sigma-delta ADCs and powers isolated RS-485 transceivers and watchdog circuits. Use Value: Dual outputs eliminate need for discrete regulators; thermal hysteresis (45ppm) and long-term drift (120ppm/√kHr) are characterized for calibration interval planning. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output precision reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT6658AHMSE-2.5#TRPBF | Same electrical specs but in 16-lead MSOP package (θJA = 35°C/W); no exposed pad | Better suited for space-constrained layouts where thermal pad attachment is impractical | Select when board assembly process cannot reliably solder exposed DFN pad or when higher θJA is acceptable |
| REF7025SHKJ | Single-output, 2.5V, 0.025% initial accuracy, 2ppm/°C drift, 0.2ppmP–P noise - superior specs but no second output or regulator capability | Requires external LDO for MCU supply; no output tracking or Kelvin sensing | Select only when dual-output functionality is unnecessary and ultra-low drift/noise outweighs integration benefits |
Compared with LT6658AHDE-2.5#TRPBF, the MSOP variant offers identical performance in a different thermal package, while REF7025SHKJ trades integration for higher single-output precision - making LT6658AHDE-2.5#TRPBF optimal for systems needing matched dual rails with regulator drive strength.
Availability
LT6658AHDE-2.5#TRPBF is available at Aetrix Electronics and suitable for high-accuracy data acquisition systems, automotive sensor modules, and industrial process controllers requiring stable component supply across extended temperature ranges.
Supply support for LT6658AHDE-2.5#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 semiconductors, serving industrial, communications, automotive, and healthcare markets.
The LT6658 family was designed to solve precision system-level challenges by merging reference-grade accuracy with regulator-level drive capability - specifically targeting applications where ADC/DAC references and supporting circuitry must share a common, thermally stable voltage source.
FAQ
What is the maximum load current supported by each output of the LT6658AHDE-2.5#TRPBF?
The LT6658AHDE-2.5#TRPBF supports up to 150mA sourcing and 20mA sinking on Output 1, and up to 50mA sourcing and 20mA sinking on Output 2. These ratings are guaranteed over the full –40°C to +125°C operating junction temperature range, with thermal shutdown protecting against sustained overload conditions.
How does the Kelvin sense configuration improve reference accuracy in the LT6658AHDE-2.5#TRPBF?
The LT6658AHDE-2.5#TRPBF uses separate force (VOUTx_F) and sense (VOUTx_S) terminals to eliminate voltage drop errors in PCB traces and interconnects. By routing the sense lines directly to the load, the internal amplifier adjusts the force output to maintain exact 2.5V at the point of use - achieving 0.25µV/mA load regulation, critical for sub-ppm system accuracy.
Can the LT6658AHDE-2.5#TRPBF outputs be adjusted to voltages other than 2.5V?
Yes - both outputs of the LT6658AHDE-2.5#TRPBF can be configured with external resistor dividers to deliver any voltage from 2.5V up to 6V, while retaining matched temperature tracking and precision specifications. The internal reference remains fixed at 2.5V; the buffers operate in gain mode to scale the output accordingly.
What is the purpose of the NR (Noise Reduction) pin on the LT6658AHDE-2.5#TRPBF?
The NR pin on the LT6658AHDE-2.5#TRPBF connects to an external capacitor that forms a low-pass filter for the internal reference, reducing integrated output noise. With a typical 10µF capacitor, it achieves the specified 1.5ppmP–P (0.1Hz–10Hz) noise floor; omitting the capacitor increases noise to ~2.2ppmP–P for the 2.5V version.
Does the LT6658AHDE-2.5#TRPBF support independent enable/disable of each output?
No - the LT6658AHDE-2.5#TRPBF features a single active-low OD (Output Disable) pin that simultaneously disables both outputs, pulling them to approximately 400mV. There is no provision for independent output control; both outputs are always enabled or disabled together, preserving their tracking relationship during transitions.
LT6658AHDE-2.5#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 16-WFDFN Exposed Pad
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Series, Dual
- Output Type:
- Adjustable (Fixed)
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- 6 V
- Current - Output:
- 150 mA
- Tolerance:
- ±0.05%
- Temperature Coefficient:
- 10ppm/°C
- Noise - 0.1Hz to 10Hz:
- 1.5ppmp-p
- Noise - 10Hz to 10kHz:
- 2ppmrms
- Voltage - Input:
- 3.5V ~ 36V
- Current - Supply:
- 3mA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-DFN (4x3)
LT6658AHDE-2.5#TRPBF FAQ
1.How can I place an order for LT6658AHDE-2.5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT6658AHDE-2.5#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 LT6658AHDE-2.5#TRPBF reliable?
The price and inventory of LT6658AHDE-2.5#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT6658AHDE-2.5#TRPBF is usually 5 days.
3.What payment methods are accepted for LT6658AHDE-2.5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT6658AHDE-2.5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT6658AHDE-2.5#TRPBF?
LT6658AHDE-2.5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT6658AHDE-2.5#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 LT6658AHDE-2.5#TRPBF?
For technical support, including LT6658AHDE-2.5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT6658AHDE-2.5#TRPBF requirements.
6.How does Aetrix verify that LT6658AHDE-2.5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT6658AHDE-2.5#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 LT6658AHDE-2.5#TRPBF meets industry standards.
7.What is the process for return or replacement of LT6658AHDE-2.5#TRPBF?
All LT6658AHDE-2.5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT6658AHDE-2.5#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 LT6658AHDE-2.5#TRPBF part is unused and in its original packaging.
Return procedure for LT6658AHDE-2.5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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