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Analog Devices Inc. LT6658AHDE-3#TRPBF
- Part No.:
- LT6658AHDE-3#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 16-WFDFN Exposed Pad
- Datasheet:
-
LT6658AHDE-3#TRPBF.pdf
- Description:
- IC VREF SERIES 6V 0.05% 16DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,755
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Product details
Overview
LT6658AHDE-3#TRPBF from Analog Devices is a precision dual-output voltage reference and regulator (Refulator™) delivering 2.5V ±0.05% initial accuracy, 10ppm/°C max temperature drift, and ultra-low 1.5ppmP–P (0.1Hz–10Hz) noise. It provides independent 150mA/50mA sourcing capability per output with Kelvin sense pins, enabling high-resolution ADC/DAC reference and microcontroller supply in single-chip form for data acquisition systems.
For engineers reviewing the LT6658AHDE-3#TRPBF datasheet, LT6658AHDE-3#TRPBF pinout, LT6658AHDE-3#TRPBF application, or LT6658AHDE-3#TRPBF equivalent, key selection criteria include dual-output tracking stability under load, H-grade (–40°C to 125°C) operation, low-noise performance with NR pin control, and separate VIN1/VIN2 supply isolation for power domain partitioning.
Technical Context
The LT6658AHDE-3#TRPBF integrates two independent low-noise reference-regulator channels sharing a common bandgap core but featuring separate buffer amplifiers, supply inputs (VIN1/VIN2), and Kelvin sense paths (VOUT1_S/VOUT2_S). Each output maintains 0.25µV/mA load regulation up to full rated current.
Its Refulator architecture enables simultaneous high-precision reference generation (for 24-bit ADCs) and clean local power delivery (for MCUs/FPGAs), with 96dB AC PSRR at 10kHz and thermal shutdown protection. The NR pin allows external capacitor-based noise filtering without compromising DC accuracy.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5V nominal, factory-trimmed for ±0.05% initial accuracy - ensures direct compatibility with 2.5V reference inputs of SAR and delta-sigma ADCs without calibration. |
| Temp Coefficient | 10ppm/°C max (H-grade) - guarantees ≤25ppm total drift over –40°C to 125°C, critical for automotive and industrial sensor signal chains. |
| Output Noise | 1.5ppmP–P (0.1Hz–10Hz) - translates to ~3.75µVP–P, enabling <1 LSB error in 20-bit+ systems with proper layout. |
| Load Regulation | 0.25µV/mA (Output 1 sourcing) - supports stable 2.5V reference even under dynamic 150mA MCU load transients. |
| Supply Rejection | 96dB at 10kHz - rejects switching regulator ripple on VIN1/VIN2, allowing use with noisy DC/DC converters. |
| Operating Range | –40°C to 125°C junction temperature - qualified for under-hood automotive and industrial control applications. |
| Package | 16-lead 4mm × 3mm DFN with exposed pad - provides low θJA = 43°C/W for thermal management at full 150mA output. |
Pinout & Package
LT6658AHDE-3#TRPBF uses a 16-lead plastic DFN (4mm × 3mm) with exposed thermal pad (Pin 17, GND). The package supports high-power dissipation (θJC = 5°C/W) and requires soldering of the exposed pad to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1,2,6,17) | Ground reference and thermal path | Multiple GND pins reduce impedance; exposed pad (Pin 17) must be soldered to PCB ground for thermal management and noise reduction. |
| VOUT1_F / VOUT2_F | Main output force terminals | Deliver regulated 2.5V; connect directly to load; require ≥1µF ceramic output capacitors for stability. |
| VOUT1_S / VOUT2_S | Kelvin sense inputs | Remote sensing points - connect to load side of trace to compensate for IR drop; enable 0.1ppm/mA effective load regulation. |
| VIN1 / VIN2 | Independent supply inputs | Allow separate power domains: VIN1 powers Output 1 (150mA), VIN2 powers Output 2 (50mA); enables supply isolation and power sequencing. |
| NR | Noise reduction filter node | Accepts external capacitor (1–10µF) to band-limit integrated noise below 10Hz; improves low-frequency noise performance without affecting DC accuracy. |
| OD | Output disable control | Active-low logic input (0.8V max low, 2V min high) - disables both outputs simultaneously with <1.5µA standby current. |
| BYPASS | Internal bandgap reference bypass | Connect 0.1µF ceramic capacitor to GND to stabilize internal reference and improve PSRR. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-output tracking | Output 1 and Output 2 track within 0.9µV/°C over temperature - eliminates differential drift errors in ratiometric ADC systems. |
| Separate supply inputs | VIN1 and VIN2 allow independent power domain assignment - enables isolated analog/digital supplies or fault-containment in safety-critical designs. |
| Kelvin sense architecture | VOUTx_S pins enable remote sensing - compensates for PCB trace resistance up to 100mΩ, maintaining reference accuracy at point-of-load. |
| H-grade temperature range | Specified from –40°C to 125°C - meets AEC-Q100 Grade 1 requirements for automotive engine control and battery monitoring. |
| Thermal shutdown | Activates at TJ > 150°C - protects device during overload or poor heatsinking; auto-recovery upon cooling. |
Applications
| Automotive Battery Monitoring | Industrial Data Acquisition |
|---|---|
Use Scenario: Real-time measurement of 12V/48V battery pack cell voltages and temperatures in EV BMS. IC Role / Device Role / Timing Role: LT6658AHDE-3#TRPBF provides matched 2.5V references for multi-channel SAR ADCs and powers isolated CAN transceivers. Use Value: Dual-output tracking ensures ratiometric accuracy across all channels; H-grade operation sustains performance at under-hood temperatures up to 125°C. | Use Scenario: High-precision sensor signal conditioning in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: LT6658AHDE-3#TRPBF supplies 2.5V reference to 24-bit delta-sigma ADCs and powers isolated microcontroller peripherals. Use Value: 1.5ppmP–P noise and 10ppm/°C drift enable <0.005% total unadjusted error (TUE) over industrial temperature range. |
| Medical Instrumentation | Aerospace Sensor Interface |
Use Scenario: Portable ECG and EEG front-end with multi-channel simultaneous sampling. IC Role / Device Role / Timing Role: LT6658AHDE-3#TRPBF delivers ultra-low-noise 2.5V reference to ADCs and powers low-noise op-amp bias networks. Use Value: NR pin filtering reduces 1/f noise contribution, preserving signal integrity for sub-µV biomedical signals. | Use Scenario: Radiation-tolerant satellite payload sensor interface requiring long-term stability and wide temperature operation. IC Role / Device Role / Timing Role: LT6658AHDE-3#TRPBF serves as primary reference for radiation-hardened ADCs and powers FPGA configuration circuitry. Use Value: 120ppm/√kHr long-term drift and 45ppm thermal hysteresis support 15+ year mission life with minimal calibration drift. |
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 |
|---|---|---|---|
| LT6658BHDE-2.5#TRPBF | ±0.1% initial accuracy, 20ppm/°C max drift (B-grade H-temp) | Lower cost for applications where 0.05% accuracy is not required, e.g., non-critical industrial controls | Select when budget constraints outweigh need for highest initial accuracy; same pinout and thermal specs. |
| REF7025IDR | Single-output 2.5V reference (4ppm/°C, 0.025% accuracy), no regulator output or Kelvin sense | Used only for reference-only roles; requires external LDO for MCU supply | Choose when system already has a clean 2.5V supply rail and only needs ultra-high-accuracy reference; smaller 8-pin SOIC package. |
Compared with LT6658BHDE-2.5#TRPBF, the LT6658AHDE-3#TRPBF offers tighter initial accuracy and lower drift for metrology-grade systems; compared with REF7025IDR, it integrates dual-output regulation and Kelvin sensing, eliminating discrete LDOs and improving board-level noise immunity.
Availability
LT6658AHDE-3#TRPBF is available at Aetrix Electronics and suitable for automotive battery management, industrial PLC analog modules, medical instrumentation, and aerospace sensor interfaces requiring stable component supply across extended temperature ranges.
Supply support for LT6658AHDE-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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LT6658 family is designed as precision Refulators™-dual-output devices merging voltage reference accuracy with linear regulator robustness-to solve noise, drift, and supply isolation challenges in high-resolution data conversion systems.
FAQ
What is the maximum load current supported by each output of the LT6658AHDE-3#TRPBF?
The LT6658AHDE-3#TRPBF supports up to 150mA sourcing and 20mA sinking on Output 1 (VOUT1_F/S), and up to 50mA sourcing and 20mA sinking on Output 2 (VOUT2_F/S). These ratings apply across the full –40°C to 125°C operating range with proper thermal management via the exposed DFN pad.
How does the Kelvin sense feature improve accuracy in the LT6658AHDE-3#TRPBF?
The LT6658AHDE-3#TRPBF's Kelvin sense pins (VOUT1_S and VOUT2_S) enable remote feedback from the load point, compensating for voltage drop across PCB traces and connectors. This achieves 0.1ppm/mA effective load regulation - critical for maintaining 2.5V reference accuracy at the ADC input despite trace resistance up to 100mΩ.
Can the LT6658AHDE-3#TRPBF outputs be adjusted to voltages other than 2.5V?
Yes - although LT6658AHDE-3#TRPBF is factory-set to 2.5V, both outputs can be externally configured using resistor dividers to any voltage up to 6V, as specified in the datasheet. The internal reference remains fixed; external resistors scale the buffered output while preserving tracking and noise performance.
What is the purpose of the NR pin on the LT6658AHDE-3#TRPBF?
The NR (Noise Reduction) pin on the LT6658AHDE-3#TRPBF accepts an external capacitor (typically 1–10µF) to form a low-pass filter for the internal reference, reducing integrated noise below 10Hz. This lowers 0.1Hz–10Hz peak-to-peak noise from 1.5ppm to sub-1ppm levels without degrading DC accuracy or load regulation of the LT6658AHDE-3#TRPBF.
Does the LT6658AHDE-3#TRPBF support independent enable/disable of its two outputs?
No - the LT6658AHDE-3#TRPBF features a single OD (Output Disable) pin that simultaneously disables both outputs when pulled low. There is no provision for independent control; both outputs turn on/off together with <160µs typical turn-on time and <1.5µA quiescent current in disabled state.
LT6658AHDE-3#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):
- 3V
- Voltage - Output (Max):
- 6 V
- Current - Output:
- 150 mA
- Tolerance:
- ±0.05%
- Temperature Coefficient:
- 10ppm/°C
- Noise - 0.1Hz to 10Hz:
- 1.6ppmp-p
- Noise - 10Hz to 10kHz:
- 2ppmrms
- Voltage - Input:
- 4.2V ~ 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-3#TRPBF FAQ
1.How can I place an order for LT6658AHDE-3#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT6658AHDE-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 LT6658AHDE-3#TRPBF reliable?
The price and inventory of LT6658AHDE-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 LT6658AHDE-3#TRPBF is usually 5 days.
3.What payment methods are accepted for LT6658AHDE-3#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT6658AHDE-3#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT6658AHDE-3#TRPBF?
LT6658AHDE-3#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT6658AHDE-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 LT6658AHDE-3#TRPBF?
For technical support, including LT6658AHDE-3#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT6658AHDE-3#TRPBF requirements.
6.How does Aetrix verify that LT6658AHDE-3#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT6658AHDE-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 LT6658AHDE-3#TRPBF meets industry standards.
7.What is the process for return or replacement of LT6658AHDE-3#TRPBF?
All LT6658AHDE-3#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT6658AHDE-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 LT6658AHDE-3#TRPBF part is unused and in its original packaging.
Return procedure for LT6658AHDE-3#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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