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Analog Devices Inc. LT1790BIS6-3.3#TRMPBF
- Part No.:
- LT1790BIS6-3.3#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LT1790BIS6-3.3#TRMPBF.pdf
- Description:
- IC VREF SERIES 0.1% TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:6,171
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Product details
Overview
LT1790BIS6-3.3#TRMPBF from Analog Devices (formerly Linear Technology) is a micropower, low-dropout, precision series voltage reference in a 6-lead TSOT-23 package, delivering 3.3V output with ±0.1% initial accuracy, 25ppm/°C max temperature coefficient, and 60µA max supply current. It operates from –40°C to 85°C and supports both sourcing and sinking current, enabling use as a positive or negative reference in battery-powered data acquisition and industrial control systems.
For engineers reviewing the LT1790BIS6-3.3#TRMPBF datasheet, LT1790BIS6-3.3#TRMPBF pinout, LT1790BIS6-3.3#TRMPBF application, or LT1790BIS6-3.3#TRMPBF equivalent, key selection criteria include guaranteed operation over –40°C to 85°C, low thermal hysteresis (40ppm), dropout voltage ≤250mV at 3mA sink, and compatibility with 1µF output capacitance for stability.
Technical Context
The LT1790BIS6-3.3#TRMPBF employs curvature-compensated bandgap architecture with post-package trimming of thin-film resistors to achieve high DC accuracy and low drift. Its dual-sourcing/sinking capability enables bidirectional current flow, allowing direct implementation as a negative reference without external inversion circuitry.
It features integrated thermal hysteresis mitigation and operates across a wide input range (3.8V to 18V) while maintaining load regulation ≤250ppm/mA (sourcing) and ≤300ppm/mA (sinking), line regulation ≤220ppm/V, and output noise of 50µVP-P (0.1Hz–10Hz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3V ±0.1% (±3.3mV) at 25°C - ensures stable ADC/DAC biasing within tight tolerance bands |
| Temp Coefficient | 25ppm/°C max (–40°C to 85°C) - limits full-range drift to ±209ppm (±0.69mV) |
| Supply Current | 60µA max - enables multi-year battery life in portable instrumentation |
| Dropout Voltage | 250mV max at 3mA sink - allows operation with only 3.55V input for 3.3V output |
| Operating Range | –40°C to 125°C junction - supports extended industrial ambient conditions |
| Output Noise | 50µVP-P (0.1Hz–10Hz), 67µVRMS (10Hz–1kHz) - suitable for 16-bit+ precision measurement front-ends |
| Hysteresis | 40ppm (–40°C to 85°C) - minimizes calibration shift after thermal cycling |
Pinout & Package
6-Lead Plastic TSOT-23 (ThinSOT™), 1mm profile, RoHS-compliant, lead-free finish. Pin 1 marked by beveled corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Input supply terminal - accepts 3.8V to 18V; must be ≥ VOUT + dropout for regulation |
| 2 | GND | Analog ground reference - requires low-impedance connection to system ground plane |
| 3 | DNC | Do Not Connect - internally unconnected; must remain floating |
| 4 | VOUT | Regulated output - sources up to 5mA or sinks up to 3mA; stable with 1µF ceramic capacitor |
| 5 | GND | Second ground terminal - improves PSRR and reduces ground bounce in noisy environments |
| 6 | DNC | Do Not Connect - internally unconnected; must remain floating |
Key Features
| Feature | Design Value |
|---|---|
| Curvature-compensated bandgap | Enables 25ppm/°C max drift without external compensation components |
| Post-package trimming | Reduces initial error to ±0.1% and improves long-term stability vs wafer-level trim alone |
| Bidirectional current capability | Sinks 3mA or sources 5mA - permits direct negative reference configuration (e.g., VOUT = –3.3V) |
| Low thermal hysteresis | 40ppm max over –40°C to 85°C cycle - preserves calibration integrity in field-deployed equipment |
| Wide input voltage range | Operates from 3.8V to 18V - accommodates varying battery states and unregulated rails |
Applications
| Handheld Data Loggers | Negative Reference Circuits |
|---|---|
Use Scenario: Portable environmental sensor node measuring temperature, humidity, and pressure with 16-bit SAR ADC. IC Role / Device Role / Timing Role: Precision 3.3V reference for ADC VREF and analog front-end biasing. Use Value: ±0.1% initial accuracy and 25ppm/°C drift ensure <0.01% total error over operating temperature, meeting Class A sensor requirements. | Use Scenario: Bipolar signal conditioning stage requiring –3.3V rail for op-amp biasing and level-shifting. IC Role / Device Role / Timing Role: Sinking-mode negative voltage reference configured with inverted topology. Use Value: Eliminates need for separate negative LDO or charge pump; maintains same accuracy and noise performance as positive mode. |
| Industrial PLC I/O Modules | Battery-Powered Medical Monitors |
Use Scenario: 4–20mA transmitter module in factory automation with 24V loop supply and isolated ADC. IC Role / Device Role / Timing Role: Stable 3.3V reference for DAC output scaling and sensor excitation. Use Value: Guaranteed operation to 125°C junction temperature enables placement near hot power components without derating. | Use Scenario: Wearable ECG device powered by single-cell Li-ion (3.0–4.2V) with ultra-low-power 12-bit delta-sigma ADC. IC Role / Device Role / Timing Role: Low-quiescent 3.3V reference supplying ADC reference and microcontroller AVCC. Use Value: 60µA max supply current extends battery runtime beyond 3 years in sleep-dominated operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR3433ARJZ-R7 | 3.3V, ±0.1% initial accuracy, 10ppm/°C max drift, 4.5µA typical supply current, SOT-23-5 | Lacks sink capability; not suitable for negative reference configurations | Select when lowest power dominates and bidirectional operation is unnecessary |
| REF3333AIDBVR | 3.3V, ±0.2% initial accuracy, 50ppm/°C max drift, 3.8µA typical supply current, SOT-23-5 | Lower accuracy and higher drift; no sink capability; rated only to 125°C junction | Select for cost-sensitive, non-critical applications where 0.2% tolerance is acceptable |
Compared with ADR3433ARJZ-R7 and REF3333AIDBVR, the LT1790BIS6-3.3#TRMPBF uniquely supports bidirectional current flow and delivers superior thermal stability (25ppm/°C vs 10ppm/°C and 50ppm/°C), making it optimal for high-accuracy, dual-polarity, or thermally demanding designs despite higher quiescent current.
Availability
LT1790BIS6-3.3#TRMPBF is available at Aetrix Electronics and suitable for handheld instruments, industrial control systems, and battery-operated equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT1790BIS6-3.3#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. (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 for precision, low-power, wide-temperature industrial and portable instrumentation-emphasizing accuracy retention under thermal stress and minimal board space via TSOT-23 packaging.
FAQ
What is the guaranteed operating temperature range for the LT1790BIS6-3.3#TRMPBF?
The LT1790BIS6-3.3#TRMPBF is specified for operation from –40°C to 85°C ambient (industrial grade), with functional guarantee up to 125°C junction temperature. This allows deployment in harsh environments such as factory floors or outdoor monitoring enclosures without derating.
Can the LT1790BIS6-3.3#TRMPBF be used as a negative voltage reference?
Yes, the LT1790BIS6-3.3#TRMPBF can sink up to 3mA and is explicitly designed for negative reference operation. When connected with its VOUT terminal grounded and VIN supplied with a negative rail (e.g., –3.3V), it regulates –3.3V at the GND pins-enabling true bipolar reference generation without external op-amps or inverters.
What is the minimum input voltage required for regulation at full load?
At 3mA sink current, the LT1790BIS6-3.3#TRMPBF requires VIN ≥ VOUT + 250mV = 3.55V. At zero load, dropout is 50mV, so VIN ≥ 3.35V suffices. Input must remain within absolute maximum rating (≤20V) and ≥3.8V per 3.3V electrical characteristics table for specified performance.
Does the LT1790BIS6-3.3#TRMPBF require an output capacitor, and if so, what value?
Yes, the LT1790BIS6-3.3#TRMPBF requires a minimum 1µF ceramic capacitor at VOUT for stability, as confirmed in all voltage-option electrical characteristics tables. Lower values risk oscillation; tantalum or electrolytic capacitors are not recommended due to ESR sensitivity.
How does the LT1790BIS6-3.3#TRMPBF compare to the LT1790AIS6-3.3#TRMPBF in accuracy and drift?
The LT1790BIS6-3.3#TRMPBF offers ±0.1% initial accuracy and 25ppm/°C max temperature coefficient, whereas the LT1790AIS6-3.3#TRMPBF provides tighter ±0.05% accuracy and 10ppm/°C max drift. Both share identical package, temperature range, and functional capabilities-selection depends on whether the application demands highest-grade stability.
LT1790BIS6-3.3#TRMPBF 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):
- 3.3V
- 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:
- 67µVrms
- Voltage - Input:
- 3.8V ~ 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
LT1790BIS6-3.3#TRMPBF FAQ
1.How can I place an order for LT1790BIS6-3.3#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1790BIS6-3.3#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 LT1790BIS6-3.3#TRMPBF reliable?
The price and inventory of LT1790BIS6-3.3#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1790BIS6-3.3#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT1790BIS6-3.3#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1790BIS6-3.3#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1790BIS6-3.3#TRMPBF?
LT1790BIS6-3.3#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1790BIS6-3.3#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 LT1790BIS6-3.3#TRMPBF?
For technical support, including LT1790BIS6-3.3#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1790BIS6-3.3#TRMPBF requirements.
6.How does Aetrix verify that LT1790BIS6-3.3#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT1790BIS6-3.3#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 LT1790BIS6-3.3#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT1790BIS6-3.3#TRMPBF?
All LT1790BIS6-3.3#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1790BIS6-3.3#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 LT1790BIS6-3.3#TRMPBF part is unused and in its original packaging.
Return procedure for LT1790BIS6-3.3#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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