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Analog Devices Inc. LT1790BCS6-2.5#TRPBF
- Part No.:
- LT1790BCS6-2.5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LT1790BCS6-2.5#TRPBF.pdf
- Description:
- IC VREF SERIES 0.1% TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,035
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Product details
Overview
LT1790BCS6-2.5#TRPBF from Analog Devices (formerly Linear Technology) is a micropower, low-dropout, 2.5V series voltage reference in a 6-lead TSOT-23 package. It delivers ±0.1% initial accuracy, 25ppm/°C max temperature coefficient, 60µA max supply current, and operates from 2.6V to 18V input across 0°C to 70°C. It serves as a precision DC bias or ADC/DAC reference in portable instrumentation.
For engineers reviewing the LT1790BCS6-2.5#TRPBF datasheet, LT1790BCS6-2.5#TRPBF pinout, LT1790BCS6-2.5#TRPBF application, or LT1790BCS6-2.5#TRPBF equivalent, key selection criteria include output accuracy over temperature, dropout voltage at 5mA sink/source, thermal hysteresis, noise performance (32µVP-P), and compatibility with negative-reference configurations.
Technical Context
The LT1790BCS6-2.5#TRPBF uses curvature-compensated bandgap architecture with post-package trimming of thin-film resistors to achieve low drift and high accuracy. It supports bidirectional current flow-sourcing up to 5mA and sinking up to 3mA-enabling both positive and negative reference topologies without external components.
Its guaranteed operation from –40°C to 125°C exceeds its specified 0°C to 70°C range, and it features low thermally induced hysteresis (40ppm over –40°C to 85°C). The device maintains stable regulation with 1µF output capacitance and exhibits 50ppm/√kHr long-term drift.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5V ±0.1% (2.4975V to 2.5025V) - ensures consistent reference level for 12-bit ADCs without calibration |
| Temp Coefficient | 25ppm/°C max - limits full-scale error to <±0.03% over 0°C–70°C ambient swing |
| Supply Current | 60µA max - enables >1-year battery life in 10µA-sleep systems with periodic measurement |
| Dropout Voltage | 120mV at 5mA source - allows operation from 2.62V supply, critical for single-cell Li-ion or coin-cell designs |
| Output Noise | 32µVP-P (0.1–10Hz) - preserves ENOB in low-frequency precision measurements |
| Hysteresis | 40ppm (–40°C to 85°C cycle) - prevents calibration drift after thermal storage or field temperature cycling |
| Line Regulation | 220ppm/V - holds output stable despite ±10% input rail variation in unregulated power supplies |
Pinout & Package
LT1790BCS6-2.5#TRPBF is housed in a 6-lead Plastic TSOT-23 package (1mm profile), marked "LTPZ", with exposed pad not connected. Pin 1 is VOUT, Pin 2 is DNC, Pin 3 is VIN, Pin 4 is GND, Pin 5 is GND, Pin 6 is DNC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT (Pin 1) | Reference Output | Stable 2.5V node; must be decoupled with ≥1µF ceramic capacitor for stability and noise reduction |
| DNC (Pin 2) | No Connect | Internally unconnected; must remain floating-no PCB trace or solder mask relief required |
| VIN (Pin 3) | Input Supply | Accepts 2.6V–18V; dropout headroom determines minimum usable input for given load current |
| GND (Pin 4) | Ground Reference | Primary return path; ties internal circuitry and substrate to system ground plane |
| GND (Pin 5) | Ground Reference | Second ground terminal reduces package inductance and improves PSRR above 10kHz |
| DNC (Pin 6) | No Connect | Internally unconnected; no electrical function or thermal role |
Key Features
| Feature | Design Value |
|---|---|
| Curvature-compensated bandgap | Enables 25ppm/°C tempco without external trimming components or calibration |
| Bidirectional current capability | Sinks 3mA / sources 5mA - supports negative reference configuration (e.g., –2.5V) with same accuracy |
| Post-package thin-film resistor trim | Reduces initial error to ±0.1% and minimizes thermal hysteresis to 40ppm |
| Low 60µA quiescent current | Permits use in always-on sensor nodes where average current budget is <100µA |
| Guaranteed operation to 125°C | Validates functionality in under-hood automotive or industrial enclosures without derating |
Applications
| Handheld Instrumentation | Negative Voltage References |
|---|---|
Use Scenario: Portable multimeter measuring DC voltage with 16-bit SAR ADC. IC Role / Device Role / Timing Role: Provides stable 2.5V reference for ADC full-scale calibration and offset nulling. Use Value: ±0.1% accuracy and 25ppm/°C drift ensure <0.02% measurement error across operating temperature, eliminating field recalibration. | Use Scenario: Precision op-amp circuit requiring symmetric ±2.5V rails from single 5V supply. IC Role / Device Role / Timing Role: Configured as sinking reference to generate accurate –2.5V rail referenced to ground. Use Value: Identical 25ppm/°C drift and 40ppm hysteresis as positive mode enable matched positive/negative reference tracking. |
| Industrial Data Acquisition | Battery-Operated Sensors |
Use Scenario: 4–20mA transmitter with HART modulation using 24-bit ΣΔ ADC. IC Role / Device Role / Timing Role: Supplies ultra-low-noise 2.5V reference for ADC and DAC in analog front-end. Use Value: 32µVP-P (0.1–10Hz) noise preserves >19 ENOB; 60µA supply current minimizes self-heating error. | Use Scenario: Wireless environmental sensor node powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Reference for low-power ADC sampling temperature/humidity every 10 seconds. Use Value: 60µA max current extends battery life beyond 2 years; 120mV dropout enables operation down to 2.62V before cutoff. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3025AIDBZR | 2.5V, ±0.2% initial accuracy, 50ppm/°C, 50µA supply current, SOT-23-3 | Lower accuracy and higher drift; 3-pin package lacks sink capability and dual GND | Choose for cost-sensitive, space-constrained designs where ±0.2% tolerance is acceptable and only sourcing is needed |
| ADR3425ARJZ-R7 | 2.5V, ±0.1% initial accuracy, 10ppm/°C, 120µA supply current, SOT-23-5 | Superior drift but double supply current; 5-pin package includes NC and separate VOUT/GND pins | Choose when ultra-low drift (<10ppm/°C) is mandatory and higher quiescent current is tolerable |
Compared with REF3025AIDBZR, LT1790BCS6-2.5#TRPBF offers tighter initial accuracy and bidirectional operation but requires two GND connections; compared with ADR3425ARJZ-R7, it halves supply current at the cost of 2.5× higher tempco-making it optimal for battery-limited, moderate-accuracy systems.
Availability
LT1790BCS6-2.5#TRPBF is available at Aetrix Electronics and suitable for handheld instrumentation, industrial data acquisition, battery-operated sensors, and negative-reference circuits requiring stable component supply and long-term calibration integrity.
Supply support for LT1790BCS6-2.5#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, including voltage references, amplifiers, and power management ICs.
The LT1790 family was designed for micropower, high-accuracy reference applications in space-constrained, battery-powered, and wide-temperature industrial systems-emphasizing low drift, low noise, and dual-polarity flexibility.
FAQ
What is the maximum load current the LT1790BCS6-2.5#TRPBF can source while maintaining regulation?
The LT1790BCS6-2.5#TRPBF guarantees regulation up to 5mA sourced current, with dropout voltage rising to 120mV at that load. Beyond 5mA, output voltage deviation exceeds specification limits. For higher loads, consider buffering with a precision op-amp or selecting a reference with higher drive capability like the LT6654.
Can the LT1790BCS6-2.5#TRPBF be used as a negative voltage reference, and what is required?
Yes-the LT1790BCS6-2.5#TRPBF can operate as a negative reference by connecting VIN to ground and using VOUT as –2.5V referenced to system ground. It sinks up to 3mA with identical accuracy and drift specs. No external components are needed, but ensure the output capacitor remains connected between VOUT and ground.
What is the typical turn-on time for the LT1790BCS6-2.5#TRPBF with a 1µF output capacitor?
The typical turn-on time for the LT1790BCS6-2.5#TRPBF with a 1µF output capacitor is 700µs, 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 0°C to 70°C temperature range.
How does thermal hysteresis affect long-term calibration stability of the LT1790BCS6-2.5#TRPBF?
The LT1790BCS6-2.5#TRPBF exhibits 40ppm hysteresis over a –40°C to 85°C thermal cycle, meaning output voltage may shift by up to ±20ppm after exposure to extreme temperatures and return to 25°C. This is critical for field-deployed instruments that undergo storage at temperature extremes before operation.
Is the LT1790BCS6-2.5#TRPBF RoHS-compliant and lead-free?
Yes-the "#TRPBF" suffix in LT1790BCS6-2.5#TRPBF indicates lead-free finish and RoHS compliance. The device uses matte tin plating on leads and meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL1), allowing unlimited floor life at ≤30°C/60% RH.
LT1790BCS6-2.5#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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-6
LT1790BCS6-2.5#TRPBF FAQ
1.How can I place an order for LT1790BCS6-2.5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1790BCS6-2.5#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 LT1790BCS6-2.5#TRPBF reliable?
The price and inventory of LT1790BCS6-2.5#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1790BCS6-2.5#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1790BCS6-2.5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1790BCS6-2.5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1790BCS6-2.5#TRPBF?
LT1790BCS6-2.5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1790BCS6-2.5#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 LT1790BCS6-2.5#TRPBF?
For technical support, including LT1790BCS6-2.5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1790BCS6-2.5#TRPBF requirements.
6.How does Aetrix verify that LT1790BCS6-2.5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1790BCS6-2.5#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 LT1790BCS6-2.5#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1790BCS6-2.5#TRPBF?
All LT1790BCS6-2.5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1790BCS6-2.5#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 LT1790BCS6-2.5#TRPBF part is unused and in its original packaging.
Return procedure for LT1790BCS6-2.5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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