My Inquiry
My Account
Analog Devices Inc. LT6658AHDE-3.3#TRPBF
- Part No.:
- LT6658AHDE-3.3#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 16-WFDFN Exposed Pad
- Datasheet:
-
LT6658AHDE-3.3#TRPBF.pdf
- Description:
- IC VREF SERIES 6V 0.05% 16DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,824
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT6658AHDE-3.3#TRPBF from Analog Devices is a precision dual-output voltage reference and linear regulator (Refulator™) delivering 3.3V ±0.05% initial accuracy and 10ppm/°C max temperature drift on both outputs. Output 1 supplies up to 150mA, Output 2 up to 50mA, with Kelvin-sense capability, 1.7ppmP–P (0.1Hz–10Hz) noise, and independent supply pins - ideal for powering high-resolution ADC/DAC references while simultaneously supplying microcontrollers in data acquisition systems.
For engineers reviewing the LT6658AHDE-3.3#TRPBF datasheet, LT6658AHDE-3.3#TRPBF pinout, LT6658AHDE-3.3#TRPBF application, or LT6658AHDE-3.3#TRPBF equivalent, key selection considerations include dual-output tracking stability over –40°C to 125°C, load regulation of 0.25µV/mA (Output 1), separate VIN1/VIN2 for power domain isolation, and thermal shutdown protection in the 4mm × 3mm DFN package with exposed pad.
Technical Context
The LT6658AHDE-3.3#TRPBF integrates two independently buffered, precision voltage references with linear regulator functionality - each output features its own feedback path, dedicated supply input (VIN1/VIN2), and Kelvin sense terminals (VOUT1_S/VOUT2_S) enabling <0.1ppm/mA load regulation under full load. Its Refulator architecture maintains tight output tracking (0.9µV/°C) between outputs across temperature and load variations.
It supports wide input range (up to 36V), delivers 96dB AC PSRR at 10kHz, and includes a noise reduction (NR) pin and bypass (BYPASS) terminal for configurable spectral shaping. The OD pin enables digital disable control with logic-compatible thresholds (0.8V low / 2V high), reducing quiescent current to 1.3mA typical when disabled.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.300V nominal, fixed - precisely sets reference and supply rails for 3.3V-system ADCs, DACs, and MCUs without external resistors. |
| Initial Accuracy | ±0.05% max - ensures absolute voltage error ≤ ±1.65mV at 25°C, critical for 16-bit+ converter calibration. |
| Temp Coefficient | 10ppm/°C max (H-grade) - guarantees ≤ ±1.32mV drift over –40°C to 125°C operating range. |
| Output Current | Output 1: 150mA source / 20mA sink; Output 2: 50mA source / 20mA sink - powers mixed-signal SoCs and analog front-ends concurrently. |
| Low-Freq Noise | 1.7ppmP–P (0.1Hz–10Hz), ≈5.6µVP–P - preserves SNR in precision measurement circuits where 1/f noise dominates. |
| Load Regulation | 0.25µV/mA (Output 1 sourcing) - maintains voltage stability under dynamic load steps typical in burst-mode sampling systems. |
| PSRR @ 10kHz | 96dB - rejects high-frequency switching noise from DC/DC converters feeding the VIN supply rail. |
Pinout & Package
LT6658AHDE-3.3#TRPBF is housed in a 16-lead (4mm × 3mm) plastic DFN package with exposed thermal pad (Pin 17 = GND). The package supports high-power dissipation (θJA = 43°C/W) and requires soldering the exposed pad to PCB ground 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 plane for thermal management and noise immunity. |
| VOUT1_F / VOUT2_F | Main output force terminals | Deliver regulated 3.3V; connect directly to load; require ≥1µF local ceramic capacitance per output for stability. |
| VOUT1_S / VOUT2_S | Kelvin sense inputs | Enable remote sensing to cancel IR drop in PCB traces - essential for maintaining <0.01% accuracy at full load. |
| VIN1 / VIN2 | Independent supply inputs | Allow separate power domains (e.g., noisy digital VIN2, clean analog VIN1); enable supply rejection isolation between outputs. |
| OD | Output disable control | Active-low logic input; pulls outputs to high-impedance state when driven <0.8V, reducing supply current to ~1.3mA. |
| BYPASS | Noise filter node | Connects to NR pin via capacitor to set low-frequency noise bandwidth; reduces integrated noise by >50% when configured. |
| NR | Noise reduction filter | Accepts external capacitor to form RC low-pass filter; suppresses broadband noise above cutoff frequency set by BYPASS cap. |
| DNC / NC | No-connect internal pins | Internally connected; must remain unconnected per datasheet - no external circuitry allowed. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-output tracking | 0.9µV/°C max tracking drift ensures matched voltage shifts between outputs - eliminates common-mode errors in ratiometric ADC systems. |
| Kelvin-sense architecture | Separate force/sense pins per output enable <0.1ppm/mA load regulation - maintains accuracy even with 100mΩ trace resistance. |
| Independent supply inputs | VIN1 and VIN2 allow physical separation of analog/digital power domains - prevents coupling of digital switching noise into reference outputs. |
| Thermal shutdown | Activates at TJ ≥ 150°C - protects device during overload or poor heatsinking; auto-recovers when junction cools. |
| Adjustable output option | Though LT6658AHDE-3.3#TRPBF is fixed 3.3V, the family supports external resistor programming up to 6V - simplifies design reuse across voltage variants. |
Applications
| Data Acquisition Systems | Automotive Control Units |
|---|---|
Use Scenario: Simultaneous sampling of multiple sensor channels (e.g., pressure, temperature, current) using a 24-bit delta-sigma ADC. IC Role / Device Role / Timing Role: LT6658AHDE-3.3#TRPBF provides ultra-stable 3.3V reference for ADC conversion and powers the ADC's digital core and SPI interface. Use Value: Dual-output tracking eliminates gain error drift between reference and supply rails, preserving end-to-end system linearity to <±2ppm over temperature. | Use Scenario: Battery management system (BMS) cell voltage monitoring with isolated CAN communication. IC Role / Device Role / Timing Role: LT6658AHDE-3.3#TRPBF supplies isolated ADC reference and powers isolated CAN transceiver and MCU in high-voltage battery stack modules. Use Value: H-grade (–40°C to 125°C) operation and thermal shutdown ensure reliability in under-hood environments; separate VIN1/VIN2 isolates analog sensing from noisy CAN bus power. |
| Industrial Process Controllers | High-Resolution Instrumentation |
Use Scenario: Programmable logic controller (PLC) analog input module measuring 4–20mA loop signals with 18-bit SAR ADC. IC Role / Device Role / Timing Role: LT6658AHDE-3.3#TRPBF drives ADC reference and powers signal conditioning op-amps and digital isolators. Use Value: 1.7ppmP–P low-frequency noise ensures <100µV RMS noise floor - enabling resolution below 10µV in 10V full-scale measurements. | Use Scenario: Portable handheld multimeter with autoranging, true RMS conversion, and LCD display. IC Role / Device Role / Timing Role: LT6658AHDE-3.3#TRPBF supplies precision reference for dual-slope integrator and powers microcontroller, display driver, and analog switches. Use Value: ±0.05% initial accuracy and 10ppm/°C drift meet Class A portable meter specifications; OD pin enables low-power sleep mode with <2µA standby current. |
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 |
|---|---|---|---|
| LT6657AHDE-3.3#TRPBF | Single-output variant (3.3V only); same accuracy, drift, and noise specs; lacks Output 2 and VIN2/NR/BYPASS pins. | Suitable only when dual output not required; smaller footprint (8-lead DFN) but no independent supply or tracking capability. | Select LT6657AHDE-3.3#TRPBF if system needs only one precision rail and space/power constraints outweigh dual-output benefits. |
| REF7033QPWR | TI single-output ultra-low-noise reference (0.25ppmP–P, 0.1Hz–10Hz); no integrated regulator; 100mA max output; no Kelvin sense or OD pin. | Requires external LDO for load drive; cannot replace LT6658AHDE-3.3#TRPBF's dual-rail + regulation functionality in one package. | Choose REF7033QPWR only for ultra-low-noise reference-only use cases where load current <100mA and no second output is needed. |
Compared with LT6657AHDE-3.3#TRPBF and REF7033QPWR, the LT6658AHDE-3.3#TRPBF uniquely combines dual matched outputs, integrated regulation, Kelvin sensing, and disable control - eliminating need for discrete regulators, sense routing, and external enable logic in high-accuracy mixed-signal designs.
Availability
LT6658AHDE-3.3#TRPBF is available at Aetrix Electronics and suitable for data acquisition systems, automotive control units, and industrial process controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT6658AHDE-3.3#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 product line was designed specifically for high-accuracy, low-noise, dual-rail applications demanding simultaneous reference and supply functionality - targeting precision data converters, sensor interfaces, and closed-loop control systems.
FAQ
What is the maximum operating junction temperature for LT6658AHDE-3.3#TRPBF?
The LT6658AHDE-3.3#TRPBF has a maximum operating junction temperature (TJMAX) of 150°C, with thermal shutdown activating at this threshold to prevent damage. Its DFN package features θJA = 43°C/W and θJC = 5°C/W, requiring proper PCB copper area under the exposed pad for reliable operation at full 150mA load in high-ambient environments.
Does LT6658AHDE-3.3#TRPBF support adjustable output voltages?
No - LT6658AHDE-3.3#TRPBF is a fixed 3.3V output variant. While the LT6658 family supports external resistor programming up to 6V on adjustable versions (e.g., LT6658AHDE-3.3#TRPBF is not programmable), this specific part number delivers precisely trimmed 3.300V with ±0.05% initial accuracy and does not accept external feedback resistors.
How does the Kelvin sense feature improve accuracy in LT6658AHDE-3.3#TRPBF?
The LT6658AHDE-3.3#TRPBF uses separate force (VOUT1_F/VOUT2_F) and sense (VOUT1_S/VOUT2_S) terminals to eliminate voltage drop errors in PCB traces or connectors. By closing the feedback loop at the load point, it achieves 0.25µV/mA load regulation - ensuring output remains within ±0.01% even with 100mΩ series resistance, critical for high-precision ratiometric measurements.
Can LT6658AHDE-3.3#TRPBF operate with different input voltages on VIN1 and VIN2?
Yes - LT6658AHDE-3.3#TRPBF allows independent supply voltages on VIN1 and VIN2, enabling isolation between analog and digital power domains. For example, VIN1 can be fed from a clean LDO for Output 1 (ADC reference), while VIN2 connects to a switched supply for Output 2 (digital logic), minimizing noise coupling without compromising regulation performance on either rail.
What is the typical turn-on time for LT6658AHDE-3.3#TRPBF?
The LT6658AHDE-3.3#TRPBF achieves 0.1% output settling in 160µs with a 1µF load capacitor, as specified in the Electrical Characteristics table. This fast startup supports power-gated subsystems in battery-powered instruments and enables rapid wake-from-sleep sequences in energy-conscious measurement applications.
LT6658AHDE-3.3#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):
- 3.3V
- Voltage - Output (Max):
- 6 V
- Current - Output:
- 150 mA
- Tolerance:
- ±0.05%
- Temperature Coefficient:
- 10ppm/°C
- Noise - 0.1Hz to 10Hz:
- 1.7ppmp-p
- Noise - 10Hz to 10kHz:
- 2ppmrms
- Voltage - Input:
- 4.5V ~ 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-3.3#TRPBF FAQ
1.How can I place an order for LT6658AHDE-3.3#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT6658AHDE-3.3#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-3.3#TRPBF reliable?
The price and inventory of LT6658AHDE-3.3#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-3.3#TRPBF is usually 5 days.
3.What payment methods are accepted for LT6658AHDE-3.3#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT6658AHDE-3.3#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT6658AHDE-3.3#TRPBF?
LT6658AHDE-3.3#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT6658AHDE-3.3#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-3.3#TRPBF?
For technical support, including LT6658AHDE-3.3#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT6658AHDE-3.3#TRPBF requirements.
6.How does Aetrix verify that LT6658AHDE-3.3#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT6658AHDE-3.3#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-3.3#TRPBF meets industry standards.
7.What is the process for return or replacement of LT6658AHDE-3.3#TRPBF?
All LT6658AHDE-3.3#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT6658AHDE-3.3#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-3.3#TRPBF part is unused and in its original packaging.
Return procedure for LT6658AHDE-3.3#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT6658AHDE-3.3#TRPBF Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
-
LM4040CYM3-2.5-TR
Microchip Technology
-
LM4040CYM3-4.1-TR
Microchip Technology
-
LM4040EIM3-2.5/NOPB
Texas Instruments
-
AZ431LBNTR-G1
Diodes Incorporated
-
LM4040D20IDBZR
Texas Instruments
-
LM4041DIM3-ADJ/NOPB
Texas Instruments
-
LM4040DIM3X-2.5/NOPB
Texas Instruments
-
LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
