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Analog Devices Inc. LT1790BIS6-2.5#TRPBF
- Part No.:
- LT1790BIS6-2.5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LT1790BIS6-2.5#TRPBF.pdf
- Description:
- IC VREF SERIES 0.1% TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:8,894
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Product details
Overview
LT1790BIS6-2.5#TRPBF from Analog Devices (formerly Linear Technology) is a micropower, low-dropout, 2.5V series voltage reference in a 6-lead TSOT-23 package, featuring ±0.1% initial accuracy, 25ppm/°C max temperature coefficient, 60µA max supply current, and guaranteed operation from –40°C to 125°C. It serves as a precision DC bias source in battery-powered data acquisition and industrial sensor signal chains.
For engineers reviewing the LT1790BIS6-2.5#TRPBF datasheet, LT1790BIS6-2.5#TRPBF pinout, LT1790BIS6-2.5#TRPBF application, or LT1790BIS6-2.5#TRPBF equivalent, key selection criteria include output stability under load variation, thermal hysteresis performance at temperature extremes, dropout voltage margin at minimum input, and compatibility with negative-reference configurations using sink capability.
Technical Context
The LT1790BIS6-2.5#TRPBF employs curvature-compensated bandgap architecture with post-package trimming of thin-film resistors to achieve tight initial accuracy and low drift. Its dual-sourcing/sinking capability enables both positive and negative reference topologies without external components.
It operates across a wide input range (2.6V to 18V), maintains <250ppm/mA load regulation when sourcing 5mA, and exhibits only 40ppm thermal hysteresis over –40°C to 85°C cycling-critical for repeatable calibration in field-deployed instrumentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5V ±0.1% (±2.5mV absolute tolerance at 25°C) |
| Temp Coefficient | 25ppm/°C max (≤62.5µV/°C drift over full industrial range) |
| Supply Current | 60µA max (enables >10-year battery life in µA-level systems) |
| Dropout Voltage | 120mV max at 5mA source (supports operation with VIN as low as 2.62V) |
| Operating Temp | –40°C to 125°C (fully specified; functional to 125°C with <0.25% shift) |
| Output Noise | 48µVRMS (10Hz–1kHz; suitable for 16-bit ADC reference without filtering) |
| Hysteresis | 40ppm (typical; ensures repeatability after thermal cycling in test equipment) |
Pinout & Package
LT1790BIS6-2.5#TRPBF uses a 6-lead Plastic TSOT-23 package (1mm profile), marked "LTPZ", with lead-free finish and tape-and-reel packaging (#TRPBF). Pin 1 is VOUT; pins 3 and 5 are GND; pin 4 is VIN; pins 2 and 6 are DNC (do not connect).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VOUT | 2.5V precision reference output; requires 1µF ceramic bypass for stability |
| 2 | DNC | No internal connection; must be left floating or grounded per layout best practice |
| 3 | GND | Analog ground return; tie directly to low-impedance system ground plane |
| 4 | VIN | Input supply (2.6V–18V); decouple locally with 0.1µF ceramic |
| 5 | GND | Second ground terminal; improves PSRR and reduces ground bounce |
| 6 | DNC | No internal connection; no routing or soldering required |
Key Features
| Feature | Design Value |
|---|---|
| Micropower operation | 60µA max supply current enables multi-year operation from coin cells in portable meters |
| Low thermal hysteresis | 40ppm over –40°C to 85°C cycling ensures repeatable calibration in environmental test chambers |
| Sink + source capability | Supports true bipolar reference generation (e.g., –2.5V) without external op-amps or resistors |
| Wide input voltage range | 2.6V to 18V operation allows direct use with unregulated battery stacks or industrial 12V rails |
| Guaranteed 125°C operation | Functional specification to 125°C supports under-hood automotive and high-temp industrial deployment |
Applications
| Handheld Instrumentation | Negative Voltage Reference |
|---|---|
Use Scenario: Portable multimeter requiring stable 2.5V reference for 16-bit SAR ADC during battery discharge. IC Role / Device Role / Timing Role: Primary voltage reference for ADC conversion and analog front-end biasing. Use Value: 60µA supply current extends alkaline battery life beyond 2 years; 25ppm/°C drift prevents recalibration drift across operating temperature. | Use Scenario: Precision current source generating –2.5V offset for op-amp-based transducer conditioning. IC Role / Device Role / Timing Role: Negative-series reference enabling rail-to-rail input common-mode range in single-supply systems. Use Value: Sink capability eliminates need for external inverting amplifier, reducing BOM count and board area by 30%. |
| Industrial Sensor Signal Chain | Battery-Operated Data Logger |
Use Scenario: 4–20mA loop transmitter with RTD interface requiring stable excitation and ADC reference. IC Role / Device Role / Timing Role: Dual-role reference: supplies 2.5V for ADC and 2.5V for RTD current source. Use Value: Matched tempco between reference and current source minimizes system gain drift to <50ppm/°C. | Use Scenario: Remote environmental monitor logging temperature/humidity every 10 minutes on CR2032 cell. IC Role / Device Role / Timing Role: Low-power reference enabling ultra-low-quiescent LDO and ADC sleep modes. Use Value: 60µA max current and 700µs turn-on time allow reference activation only during sampling, cutting average system current to <1µA. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR3425BRJZ-R7 | 2.5V, ±0.1% initial accuracy, 12ppm/°C max, 4.5µA typical supply current, SOT-23-5 | Lower power but single-supply only; no sink capability; 5-pin vs 6-pin footprint | Select for ultra-low-power designs where negative reference is unnecessary and PCB space is constrained. |
| REF3325AIDBVR | 2.5V, ±0.1% initial accuracy, 10ppm/°C max, 4.5µA typical supply current, SOT-23-5 | Higher accuracy grade available (A-grade = 0.05%), but no sink capability and narrower input range (up to 5.5V) | Select when highest long-term stability is required and supply rail is ≤5.5V; verify thermal hysteresis spec separately. |
Compared with ADR3425BRJZ-R7 and REF3325AIDBVR, the LT1790BIS6-2.5#TRPBF uniquely supports bidirectional current flow and operates up to 18V input-making it the only choice for high-voltage industrial sensors or dual-polarity reference generation without added circuitry.
Availability
LT1790BIS6-2.5#TRPBF is available at Aetrix Electronics and suitable for handheld instrumentation, industrial sensor signal chains, and battery-operated data loggers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT1790BIS6-2.5#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 acquired Linear Technology in 2017 and maintains its precision analog portfolio, renowned for high-performance references, amplifiers, and power management ICs.
The LT1790 family was designed for micropower, high-accuracy voltage referencing in space-constrained, battery-sensitive applications-emphasizing low drift, low hysteresis, and dual-polarity flexibility.
FAQ
What is the maximum input voltage rating for the LT1790BIS6-2.5#TRPBF?
The LT1790BIS6-2.5#TRPBF has an absolute maximum input voltage rating of 20V, with guaranteed operational performance up to 18V across its full temperature range. Exceeding 20V risks permanent damage per Absolute Maximum Ratings. For reliable long-term operation, maintain VIN ≤18V with appropriate derating in high-temperature environments.
Can the LT1790BIS6-2.5#TRPBF be used as a negative voltage reference?
Yes, the LT1790BIS6-2.5#TRPBF can operate as a negative voltage reference by connecting VIN to system ground and VOUT to a negative rail (e.g., –2.5V), leveraging its ability to sink up to 3mA. This configuration requires no external components and maintains the same ±0.1% accuracy and 25ppm/°C tempco as the positive mode.
What is the typical turn-on time for the LT1790BIS6-2.5#TRPBF?
The typical turn-on time for the LT1790BIS6-2.5#TRPBF is 700µs when driving a 1µF load capacitor, measured from VIN reaching regulation to VOUT settling within 0.1% of 2.5V. This value is confirmed in the 2.5V Electrical Characteristics table and applies across the full –40°C to 85°C temperature range.
Does the LT1790BIS6-2.5#TRPBF require an output capacitor for stability?
Yes, the LT1790BIS6-2.5#TRPBF requires a minimum 1µF ceramic capacitor at the VOUT pin for stability, as specified in the Typical Application schematic and Electrical Characteristics conditions. Omitting this capacitor may cause oscillation or degraded noise performance, especially under dynamic load conditions.
How does thermal hysteresis affect calibration accuracy in the LT1790BIS6-2.5#TRPBF?
Thermal hysteresis in the LT1790BIS6-2.5#TRPBF is specified at 40ppm (typical) over –40°C to 85°C cycling, meaning repeated temperature excursions may cause up to ±0.0001V offset shift at 2.5V output. This is critical in metrology-grade instruments where calibration must remain valid after storage or transport across temperature zones.
LT1790BIS6-2.5#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):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 5 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 25ppm/°C
- Noise - 0.1Hz to 10Hz:
- 32µVp-p
- Noise - 10Hz to 10kHz:
- 48µVrms
- Voltage - Input:
- 3V ~ 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
LT1790BIS6-2.5#TRPBF FAQ
1.How can I place an order for LT1790BIS6-2.5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1790BIS6-2.5#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 LT1790BIS6-2.5#TRPBF reliable?
The price and inventory of LT1790BIS6-2.5#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1790BIS6-2.5#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1790BIS6-2.5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1790BIS6-2.5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1790BIS6-2.5#TRPBF?
LT1790BIS6-2.5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1790BIS6-2.5#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 LT1790BIS6-2.5#TRPBF?
For technical support, including LT1790BIS6-2.5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1790BIS6-2.5#TRPBF requirements.
6.How does Aetrix verify that LT1790BIS6-2.5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1790BIS6-2.5#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 LT1790BIS6-2.5#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1790BIS6-2.5#TRPBF?
All LT1790BIS6-2.5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1790BIS6-2.5#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 LT1790BIS6-2.5#TRPBF part is unused and in its original packaging.
Return procedure for LT1790BIS6-2.5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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