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Analog Devices Inc. LT1790BCS6-5#TRPBF
- Part No.:
- LT1790BCS6-5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LT1790BCS6-5#TRPBF.pdf
- Description:
- IC VREF SERIES 0.1% TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,029
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Product details
Overview
LT1790BCS6-5#TRPBF from Analog Devices (formerly Linear Technology) is a micropower, low-dropout, 5V 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 125°C - ideal for high-accuracy ADC/DAC biasing in battery-powered instrumentation.
For engineers reviewing the LT1790BCS6-5#TRPBF datasheet, LT1790BCS6-5#TRPBF pinout, LT1790BCS6-5#TRPBF application, or LT1790BCS6-5#TRPBF equivalent, this page provides verified electrical specs, thermal hysteresis data (40ppm), dropout voltage (120mV at 5mA sourcing), negative-reference capability, and real-world load regulation performance across temperature.
Technical Context
The LT1790BCS6-5#TRPBF uses curvature-compensated bandgap architecture with post-package trimming of thin-film resistors to achieve tight initial accuracy and low drift. Its ability to both source and sink current enables dual-polarity operation without external components.
It features guaranteed operation from –40°C to 125°C, 5.5V to 18V input range, and maintains 0.1% output stability under 5mA sourcing or 3mA sinking loads - critical for precision sensor signal chains and portable medical devices requiring long-term voltage stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000V ±0.1% (±5mV absolute tolerance at 25°C) |
| Temp Coefficient | 25ppm/°C max (≤125ppm total drift over –40°C to 125°C) |
| Supply Current | 60µA max (enables >10-year battery life in µA-level systems) |
| Dropout Voltage | 120mV at 5mA sourcing (supports operation with VIN as low as 5.12V) |
| Load Regulation | 250ppm/mA max sourcing (±1.25mV shift per mA load change) |
| Hysteresis | 40ppm over –40°C to 85°C cycling (minimal memory effect after thermal stress) |
| Operating Temp | –40°C to 125°C (fully specified; functional to 125°C with <0.25% shift) |
Pinout & Package
LT1790BCS6-5#TRPBF is housed in a 6-lead plastic TSOT-23 package (1mm height), marked "LTQC", with lead-free finish and tape-and-reel packaging (#TRPBF). Pin 1 is marked by a dot; pins 3 and 6 are DNC (do not connect).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Input supply (5.5V to 18V); must exceed VOUT by ≥120mV for regulation |
| 2 | GND | Analog ground reference; requires low-impedance PCB connection |
| 3 | DNC | No internal connection; leave unconnected and unbonded |
| 4 | VOUT | Stable 5V reference output; capable of sourcing up to 5mA or sinking 3mA |
| 5 | GND | Second ground terminal; improves PSRR and thermal stability when tied to same plane as Pin 2 |
| 6 | DNC | No internal connection; leave unconnected and unbonded |
Key Features
| Feature | Design Value |
|---|---|
| Micropower operation | 60µA max supply current enables multi-year coin-cell operation in portable meters |
| Bipolar reference capability | Sinks 3mA - allows direct –5V generation with single resistor (no op-amp needed) |
| Low thermal hysteresis | 40ppm over –40°C to 85°C cycling ensures repeatable calibration after field temperature excursions |
| High PSRR | ≥60dB at 10Hz (typical) rejects ripple from noisy DC/DC converters in mixed-signal systems |
| Guaranteed 125°C operation | Functional at full spec up to 125°C - suitable for under-hood automotive sensors and industrial PLC modules |
Applications
| Handheld Instruments | Negative Voltage References |
|---|---|
Use Scenario: Portable multimeters and handheld oscilloscopes requiring stable 5V reference for 16-bit ADCs and LCD bias. IC Role / Device Role / Timing Role: Primary voltage reference for analog front-end scaling and DAC output calibration. Use Value: ±0.1% accuracy and 25ppm/°C drift ensure measurement repeatability across operating temperature ranges without recalibration. | Use Scenario: Generating –5V rail for op-amp dual-supply circuits in portable data loggers. IC Role / Device Role / Timing Role: Sinking-mode negative reference using external resistor to GND. Use Value: Eliminates need for dedicated inverting charge pump or op-amp stage - reduces BOM count and board area by 30%. |
| Industrial Control Systems | Battery-Operated Equipment |
Use Scenario: 4–20mA transmitter modules in factory automation where ambient temperature swings exceed 80°C. IC Role / Device Role / Timing Role: Precision reference for current-loop DAC and sensor excitation circuitry. Use Value: Guaranteed operation to 125°C and 40ppm hysteresis prevent output drift during thermal cycling in enclosed enclosures. | Use Scenario: Wireless sensor nodes powered by CR2032 batteries with 10+ year lifetime targets. IC Role / Device Role / Timing Role: Low-power reference for ultra-low-duty-cycle microcontroller ADC sampling. Use Value: 60µA max quiescent current extends battery life beyond 12 years at 1-sample-per-minute duty cycle. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR3450ARJZ-R7 | 5.0V output, ±0.1% initial accuracy, 20ppm/°C max drift, 125µA supply current, SOT-23-5 | Higher supply current; no sinking capability; single-GND pin | Choose if lower tempco is prioritized over power and bipolar operation |
| REF5050AIDR | 5.0V output, ±0.05% initial accuracy, 3ppm/°C max drift, 950µA supply current, SOIC-8 | Higher accuracy and lower drift, but 15× higher supply current and larger package | Choose for lab-grade instrumentation where power is not constrained and ultimate stability is required |
Compared with ADR3450ARJZ-R7 and REF5050AIDR, the LT1790BCS6-5#TRPBF uniquely balances micropower operation (60µA), bipolar functionality (source/sink), and robust 125°C operation - making it optimal for space- and energy-constrained embedded systems where dual-rail generation or extended temperature reliability is essential.
Availability
LT1790BCS6-5#TRPBF is available at Aetrix Electronics and suitable for handheld instruments, industrial control systems, and battery-operated equipment requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for LT1790BCS6-5#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, op-amps, and power management ICs.
The LT1790 family was designed for high-accuracy, low-power, wide-temperature applications - especially portable test equipment, sensor interfaces, and industrial systems demanding stable references without thermal recalibration.
FAQ
What is the maximum load current LT1790BCS6-5#TRPBF can source while maintaining regulation?
The LT1790BCS6-5#TRPBF guarantees regulation up to 5mA sourcing current with ≤0.1% output error. At 5mA, dropout voltage is 120mV (VIN ≥ 5.12V), and load regulation is 250ppm/mA - meaning output shifts ≤1.25mV per mA change. Exceeding 5mA risks loss of regulation and increased drift.
Can LT1790BCS6-5#TRPBF be used as a negative voltage reference, and how is it configured?
Yes, LT1790BCS6-5#TRPBF can operate as a negative reference by connecting VOUT to system ground and sinking current from VIN through an external resistor to a negative rail. For –5V generation, tie VOUT to GND, apply –5.5V to VIN, and use a resistor to sink ≥100µA (minimum operating current). The device maintains same accuracy and drift specs in sink mode.
What is the thermal hysteresis specification for LT1790BCS6-5#TRPBF, and why does it matter in field-deployed equipment?
LT1790BCS6-5#TRPBF exhibits 40ppm hysteresis over –40°C to 85°C temperature cycling. This means output voltage may shift up to 0.2mV after repeated exposure to extreme temperatures - critical for field-calibrated instruments (e.g., portable gas analyzers) where thermal history affects measurement repeatability without user intervention.
Does LT1790BCS6-5#TRPBF require an output capacitor, and what value is recommended?
Yes, LT1790BCS6-5#TRPBF requires a minimum 1µF ceramic output capacitor (X7R or C0G) placed within 2mm of VOUT and GND pins. This stabilizes loop response, reduces noise (especially 0.1Hz–10Hz output noise of 80µVP-P), and improves load transient recovery. Larger values (e.g., 4.7µF) further reduce impedance below 1kHz but do not affect DC accuracy.
How does the supply current of LT1790BCS6-5#TRPBF vary with input voltage and temperature?
LT1790BCS6-5#TRPBF supply current remains stable at ≤60µA across 5.5V–18V input and –40°C–125°C ambient. Typical current is 35µA at 25°C and 5.5V, rising to 60µA at 125°C - a predictable, low-drift characteristic essential for battery-life modeling in energy-harvesting and IoT edge nodes.
LT1790BCS6-5#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):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 5 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 25ppm/°C
- Noise - 0.1Hz to 10Hz:
- 80µVp-p
- Noise - 10Hz to 10kHz:
- 118µVrms
- Voltage - Input:
- 5.5V ~ 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
LT1790BCS6-5#TRPBF FAQ
1.How can I place an order for LT1790BCS6-5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1790BCS6-5#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 LT1790BCS6-5#TRPBF reliable?
The price and inventory of LT1790BCS6-5#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1790BCS6-5#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1790BCS6-5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1790BCS6-5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1790BCS6-5#TRPBF?
LT1790BCS6-5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1790BCS6-5#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 LT1790BCS6-5#TRPBF?
For technical support, including LT1790BCS6-5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1790BCS6-5#TRPBF requirements.
6.How does Aetrix verify that LT1790BCS6-5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1790BCS6-5#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 LT1790BCS6-5#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1790BCS6-5#TRPBF?
All LT1790BCS6-5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1790BCS6-5#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 LT1790BCS6-5#TRPBF part is unused and in its original packaging.
Return procedure for LT1790BCS6-5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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