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Analog Devices Inc. LT1790BCS6-5#TRMPBF
- Part No.:
- LT1790BCS6-5#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LT1790BCS6-5#TRMPBF.pdf
- Description:
- IC VREF SERIES 0.1% TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,480
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Product details
Overview
LT1790BCS6-5#TRMPBF 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. It serves as a stable reference for high-resolution ADCs and DACs in portable instrumentation.
For engineers reviewing the LT1790BCS6-5#TRMPBF datasheet, LT1790BCS6-5#TRMPBF pinout, LT1790BCS6-5#TRMPBF application, or LT1790BCS6-5#TRMPBF equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, application-specific implementation guidance, and two confirmed alternative parts with functional trade-offs.
Technical Context
The LT1790BCS6-5#TRMPBF uses curvature-compensated bandgap architecture with post-package trimming to achieve low thermal hysteresis (40ppm typical over –40°C to 85°C) and high output stability. Its internal circuitry supports both sourcing and sinking up to 5mA, enabling use as either a positive or negative reference without performance degradation.
It features guaranteed operation across –40°C to 125°C ambient, with dropout voltage as low as 50mV at zero load and 120mV at 5mA source current. Line regulation is specified at 50ppm/V (typical) over input voltages from 5.5V to 18V, and load regulation is 80ppm/mA (typical) when sourcing 5mA.
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 (≤125µV drift over 0°C to 70°C range) |
| Supply Current | 60µA max (enables >10-year battery life in 10µA-systems) |
| Dropout Voltage | 120mV at 5mA source load (supports operation with VIN as low as 5.12V) |
| Operating Temp | –40°C to 125°C (fully specified; functional beyond 125°C per Note 2) |
| Output Noise | 80µVP-P (0.1Hz–10Hz); 118µVRMS (10Hz–1kHz) - critical for 16+ bit data converters |
| Hysteresis | 40ppm typical (–40°C to 85°C cycling) - ensures repeatable calibration after thermal stress |
Pinout & Package
6-Lead Plastic TSOT-23 (ThinSOT™), 1mm profile, RoHS-compliant, lead-free finish. Pin 1 marked via laser scribe; pinout matches standard SOT-23 orientation with exposed pad not connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Input supply terminal; must be ≥5.12V for full 5mA sourcing capability |
| 2 | GND | Analog ground reference; requires low-impedance connection to minimize noise coupling |
| 3 | DNC | Do Not Connect - internally unused; must remain floating |
| 4 | GND | Second ground terminal; improves PSRR and thermal stability when tied to same ground plane |
| 5 | DNC | Do Not Connect - internally unused; must remain floating |
| 6 | VOUT | Regulated 5V output; capable of sourcing or sinking up to 5mA with <0.1% line/load regulation |
Key Features
| Feature | Design Value |
|---|---|
| Micropower operation | 60µA max supply current enables multi-year battery life in handheld meters and IoT sensors |
| Bidirectional current capability | Sinks and sources up to 5mA - allows direct use as negative reference (e.g., –5V) without external components |
| Low thermal hysteresis | 40ppm typical over –40°C to 85°C cycling - preserves calibration integrity in field-deployed equipment |
| Wide input range | Operates from 5.5V to 18V - compatible with unregulated 9V batteries and industrial 12V rails |
| Post-package trimming | Ensures ±0.1% initial accuracy and tight tempco without reliance on die-level binning alone |
Applications
| Handheld Instruments | Negative Voltage References |
|---|---|
Use Scenario: Portable multimeter requiring stable 5V reference for 24-bit sigma-delta ADC. IC Role / Device Role / Timing Role: Primary voltage reference for analog front-end; sets full-scale range and offset null point. Use Value: ±0.1% initial accuracy and 25ppm/°C tempco ensure <0.02% measurement error across 0–50°C operating range. | Use Scenario: Precision op-amp biasing in dual-supply signal conditioning stage. IC Role / Device Role / Timing Role: Negative reference generator (–5V) using inverted configuration with external resistor network. Use Value: Identical sourcing/sinking specs enable matched positive/negative reference pairs with <10ppm gain error. |
| Industrial Control Systems | Data Acquisition Systems |
Use Scenario: 4–20mA transmitter loop-powered by 24V rail with isolated 5V reference for DAC. IC Role / Device Role / Timing Role: Low-power, high-stability reference for 16-bit DAC driving current output stage. Use Value: 60µA supply current minimizes loop power burden; 125°C rating supports enclosure mounting near heat sources. | Use Scenario: Modular DAQ module with multiple 18-bit SAR ADCs sharing common reference. IC Role / Device Role / Timing Role: Shared precision reference for simultaneous sampling ADCs; low noise prevents SNR degradation. Use Value: 80µVP-P (0.1–10Hz) noise avoids LSB errors in 18-bit conversion (LSB = 19µV @ 5V full scale). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR3450ARJZ-R7 | 5.0V output, ±0.1% initial accuracy, 10ppm/°C max tempco, 125µA max supply current | Higher supply current limits battery life; tighter tempco suits higher-accuracy systems | Select when long-term stability (<15ppm/√kHr) and lower tempco outweigh micropower needs |
| REF5050AIDR | 5.0V output, ±0.05% initial accuracy, 3ppm/°C max tempco, 950µA supply current, SOIC-8 package | Higher power and larger footprint; superior long-term drift (3ppm/√kHr vs 50ppm/√kHr) | Select for lab-grade instrumentation where accuracy and drift dominate size/power constraints |
Compared with ADR3450ARJZ-R7 and REF5050AIDR, the LT1790BCS6-5#TRMPBF offers the lowest quiescent current (60µA) and smallest footprint (TSOT-23), making it optimal for space- and energy-constrained designs where ±0.1% accuracy suffices - but trades off against tighter tempco and lower long-term drift available in alternatives.
Availability
LT1790BCS6-5#TRMPBF is available at Aetrix Electronics and suitable for handheld instruments, industrial control systems, data acquisition modules, and battery-operated equipment requiring stable component supply across extended temperature ranges.
Supply support for LT1790BCS6-5#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 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 ultra-low-power, high-accuracy reference applications in portable and harsh-environment systems - emphasizing micropower operation, wide temperature range, and bidirectional current capability.
FAQ
What is the maximum load current the LT1790BCS6-5#TRMPBF can source while maintaining specification?
The LT1790BCS6-5#TRMPBF can source up to 5mA while maintaining its specified line and load regulation (80ppm/mA typical). At 5mA, dropout voltage is 120mV max, requiring VIN ≥ 5.12V. Exceeding 5mA may degrade output accuracy and increase thermal drift.
Can the LT1790BCS6-5#TRMPBF be used as a negative voltage reference?
Yes - the LT1790BCS6-5#TRMPBF can sink current and operate as a negative reference (e.g., –5V) using the configuration shown in Figure 7 of the datasheet. It maintains the same ±0.1% accuracy and 25ppm/°C tempco in negative mode, with minimum sink current of 100µA required for regulation.
What is the thermal hysteresis performance of the LT1790BCS6-5#TRMPBF over –40°C to 85°C?
The LT1790BCS6-5#TRMPBF exhibits 40ppm typical thermal hysteresis when cycled between –40°C and 85°C, measured at 25°C after each extreme temperature soak. This value is confirmed in the Electrical Characteristics table (Note 10) and ensures repeatability in field-recovered calibration routines.
Does the LT1790BCS6-5#TRMPBF require an output capacitor for stability?
No external capacitor is required for stability, but a 1µF ceramic capacitor at VOUT is recommended to reduce output noise and improve transient response. The datasheet specifies CL = 1µF for all typical performance curves, and output impedance remains <1Ω up to 10kHz with this capacitance.
What is the long-term drift specification for the LT1790BCS6-5#TRMPBF?
The LT1790BCS6-5#TRMPBF has a long-term drift of 50ppm/√kHr, measured under standard conditions (TA = 30°C, soldered to PCB). This logarithmic drift means ~50ppm shift occurs in the first 1000 hours, with diminishing change thereafter - critical for systems requiring recalibration intervals >1 year.
LT1790BCS6-5#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):
- 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#TRMPBF FAQ
1.How can I place an order for LT1790BCS6-5#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1790BCS6-5#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 LT1790BCS6-5#TRMPBF reliable?
The price and inventory of LT1790BCS6-5#TRMPBF 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#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT1790BCS6-5#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1790BCS6-5#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1790BCS6-5#TRMPBF?
LT1790BCS6-5#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1790BCS6-5#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 LT1790BCS6-5#TRMPBF?
For technical support, including LT1790BCS6-5#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1790BCS6-5#TRMPBF requirements.
6.How does Aetrix verify that LT1790BCS6-5#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT1790BCS6-5#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 LT1790BCS6-5#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT1790BCS6-5#TRMPBF?
All LT1790BCS6-5#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1790BCS6-5#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 LT1790BCS6-5#TRMPBF part is unused and in its original packaging.
Return procedure for LT1790BCS6-5#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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