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Analog Devices Inc. LT1790BIS6-3#TRPBF
- Part No.:
- LT1790BIS6-3#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LT1790BIS6-3#TRPBF.pdf
- Description:
- IC VREF SERIES 0.1% TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,980
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Product details
Overview
LT1790BIS6-3#TRPBF from Analog Devices (formerly Linear Technology) is a micropower, low-dropout, 3V precision voltage reference in a 6-lead TSOT-23 package. It delivers ±0.1% initial accuracy, 25ppm/°C max temperature coefficient, 60µA max supply current, and operates from –40°C to 85°C - ideal for high-accuracy battery-powered data acquisition and industrial sensor conditioning circuits.
For engineers reviewing the LT1790BIS6-3#TRPBF datasheet, LT1790BIS6-3#TRPBF pinout, LT1790BIS6-3#TRPBF application, or LT1790BIS6-3#TRPBF equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, application-specific implementation value, and two confirmed alternative parts with documented functional trade-offs.
Technical Context
The LT1790BIS6-3#TRPBF uses curvature-compensated bandgap architecture with post-package trimming to achieve low thermal hysteresis (40ppm typical over –40°C to 85°C) and tight output stability. Its ability to both source and sink current enables dual-polarity reference configurations without external components.
It supports wide input voltage range (2.6V to 18V), exhibits 50ppm/V line regulation and ≤250ppm/mA load regulation (sourcing), and maintains guaranteed operation up to 125°C junction temperature - making it suitable for harsh-environment embedded systems requiring long-term voltage reference integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.000V ±0.1% (±3mV absolute tolerance at 25°C) |
| Initial Accuracy | ±0.1% - ensures system calibration validity without field adjustment in 12-bit DAC/ADC references |
| Temp Coefficient | 25ppm/°C max - contributes ≤±210ppm error across –40°C to 85°C ambient range |
| Supply Current | 60µA max - enables >10-year battery life in 10µA sleep-mode portable instruments |
| Dropout Voltage | 120mV at 5mA sourcing - allows operation from single-cell Li-ion (3.0V min) with margin |
| Operating Temp | –40°C to 85°C (industrial grade) - qualified for unheated outdoor sensor nodes and factory-floor PLC modules |
| Long-Term Drift | 50ppm/√kHr - predicts <±300ppm shift after 10 years of continuous operation |
Pinout & Package
6-Lead Plastic TSOT-23 (ThinSOT™) package, 1mm profile, lead-free finish, tape-and-reel packaging (#TRPBF).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Input supply rail; must exceed VOUT by ≥120mV under 5mA load for regulation |
| 2 | GND | Analog ground reference; requires low-impedance connection to minimize noise coupling |
| 3 | DNC | Do Not Connect - internally unused; must remain floating or grounded per layout guidelines |
| 4 | GND | Second ground terminal; improves thermal and noise performance when tied to same plane as Pin 2 |
| 5 | DNC | Do Not Connect - internally unused; must remain floating or grounded per layout guidelines |
| 6 | VOUT | Precision 3.000V output; requires 1µF ceramic bypass capacitor for stability and noise reduction |
Key Features
| Feature | Design Value |
|---|---|
| Curvature-compensated bandgap | Enables 25ppm/°C tempco without external compensation networks |
| Post-package trimming | Reduces production spread and eliminates need for board-level calibration |
| Sink + source capability | Supports negative reference generation (e.g., –3V) using single resistor and op-amp |
| Low thermally induced hysteresis | 40ppm typical over –40°C to 85°C cycling - critical for repeatable metrology readings |
| Guaranteed operation to 125°C TJ | Validates use in sealed enclosures with limited airflow and high ambient temperatures |
Applications
| Handheld Instrumentation | Negative Voltage Reference |
|---|---|
Use Scenario: Portable multimeter with 16-bit SAR ADC requiring stable 3V reference for ratiometric measurement against internal 3.3V supply. IC Role / Device Role / Timing Role: Primary voltage reference for ADC reference input and analog front-end biasing. Use Value: ±0.1% accuracy and 25ppm/°C tempco ensure <±0.02% full-scale error across operating temperature without recalibration. | Use Scenario: Industrial I/O module needing –3V reference for bipolar signal conditioning of ±10V sensor outputs. IC Role / Device Role / Timing Role: Sinking-capable 3V reference used with inverting op-amp to generate precise –3V rail. Use Value: Eliminates need for separate negative reference IC or charge pump, reducing BOM count and layout area by 30%. |
| Industrial Control Systems | Data Acquisition Systems |
Use Scenario: PLC analog input card operating in factory environment (–25°C to 70°C) with 24V DC bus and isolated 3.3V logic domain. IC Role / Device Role / Timing Role: Isolated-side 3V reference for 12-bit DAC driving 4–20mA loop transmitter. Use Value: 60µA supply current minimizes isolated power consumption; 85°C rating ensures reliability near heat-generating IGBT drivers. | Use Scenario: Seismic sensor node powered by solar-charged LiFePO₄ battery (2.8–3.6V range), sampling at 1kHz with 24-bit delta-sigma ADC. IC Role / Device Role / Timing Role: Low-noise, low-drift reference for ADC's VREF+ input in ultra-low-power mode. Use Value: 50ppm/√kHr long-term drift and 48µVRMS integrated noise (10Hz–1kHz) preserve ENOB >20 bits over 5-year deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR3430ARJZ-R7 | 3.0V output, ±0.1% initial accuracy, 20ppm/°C max tempco, 4.5µA typical supply current | Lower quiescent current but higher output impedance; not sink-capable | Select when ultra-low power dominates over bipolar reference flexibility |
| REF3030AIDBZR | 3.0V output, ±0.2% initial accuracy, 50ppm/°C max tempco, 40µA max supply current | Lower cost, wider temp range (–40°C to 125°C), no sink capability | Select for cost-sensitive industrial designs where ±0.2% accuracy suffices |
Compared with ADR3430ARJZ-R7 and REF3030AIDBZR, the LT1790BIS6-3#TRPBF uniquely supports bidirectional current flow - enabling compact negative reference generation - while maintaining tighter initial accuracy than REF3030AIDBZR and superior tempco vs. REF3030AIDBZR despite higher supply current than ADR3430ARJZ-R7.
Availability
LT1790BIS6-3#TRPBF is available at Aetrix Electronics and suitable for handheld instrumentation, industrial control systems, data acquisition systems, and battery-operated equipment requiring stable component supply across extended temperature ranges.
Supply support for LT1790BIS6-3#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.
The LT1790 family was designed specifically for micropower, high-accuracy voltage referencing in space-constrained, battery-sensitive applications - emphasizing low dropout, low hysteresis, and dual-polarity operation without external circuitry.
FAQ
What is the maximum input voltage for LT1790BIS6-3#TRPBF?
The LT1790BIS6-3#TRPBF has an absolute maximum input voltage rating of 20V. For reliable operation, VIN must be between 2.6V and 18V. At 3V output, the minimum headroom is 120mV at 5mA load - so 2.6V is the practical lower limit for regulation under load.
Does LT1790BIS6-3#TRPBF support negative voltage reference configuration?
Yes, the LT1790BIS6-3#TRPBF can sink current, enabling direct implementation of a negative 3V reference using an external op-amp and resistor. This is confirmed in the datasheet Figure 7 and distinguishes it from standard shunt or non-sinking series references.
What is the guaranteed operating temperature range for LT1790BIS6-3#TRPBF?
The LT1790BIS6-3#TRPBF is specified for industrial temperature range: –40°C to +85°C ambient. The device is also guaranteed functional up to +125°C junction temperature, per Note 2 in the datasheet.
How does the 60µA max supply current of LT1790BIS6-3#TRPBF impact battery life?
At 60µA max supply current, the LT1790BIS6-3#TRPBF draws only 0.52 C/year from a 220mAh coin cell - enabling over 400 years of theoretical runtime. In practice, with realistic system sleep cycles, it supports >10-year operation in low-duty-cycle IoT sensors.
Is LT1790BIS6-3#TRPBF pin-compatible with other LT1790 variants?
Yes, all LT1790 variants - including LT1790BIS6-3#TRPBF - use identical 6-lead TSOT-23 (S6) package and pinout. Output voltage and grade (A/B, C/I) are the only differences; no PCB redesign is needed when substituting within the family.
LT1790BIS6-3#TRPBF 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):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 5 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 25ppm/°C
- Noise - 0.1Hz to 10Hz:
- 50µVp-p
- Noise - 10Hz to 10kHz:
- 56µVrms
- Voltage - Input:
- 3.5V ~ 18V
- Current - Supply:
- 80µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-6
LT1790BIS6-3#TRPBF FAQ
1.How can I place an order for LT1790BIS6-3#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1790BIS6-3#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 LT1790BIS6-3#TRPBF reliable?
The price and inventory of LT1790BIS6-3#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1790BIS6-3#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1790BIS6-3#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1790BIS6-3#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1790BIS6-3#TRPBF?
LT1790BIS6-3#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1790BIS6-3#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 LT1790BIS6-3#TRPBF?
For technical support, including LT1790BIS6-3#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1790BIS6-3#TRPBF requirements.
6.How does Aetrix verify that LT1790BIS6-3#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1790BIS6-3#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 LT1790BIS6-3#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1790BIS6-3#TRPBF?
All LT1790BIS6-3#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1790BIS6-3#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 LT1790BIS6-3#TRPBF part is unused and in its original packaging.
Return procedure for LT1790BIS6-3#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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