My Inquiry
My Account
Analog Devices Inc. LT1790BCS6-2.5#TRMPBF
- Part No.:
- LT1790BCS6-2.5#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LT1790BCS6-2.5#TRMPBF.pdf
- Description:
- IC VREF SERIES 0.1% TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:43,978
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT1790BCS6-2.5#TRMPBF 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 –40°C to 125°C. It is used in precision data acquisition systems where stable, low-power reference voltage is critical.
For engineers reviewing the LT1790BCS6-2.5#TRMPBF datasheet, LT1790BCS6-2.5#TRMPBF pinout, LT1790BCS6-2.5#TRMPBF application, or LT1790BCS6-2.5#TRMPBF equivalent, key selection criteria include output accuracy over temperature, dropout voltage at 5mA sink/source, thermal hysteresis, noise performance (32µVP-P), and compatibility with battery-powered or space-constrained industrial instrumentation.
Technical Context
The LT1790BCS6-2.5#TRMPBF employs curvature-compensated bandgap architecture with post-package trimming of thin-film resistors to achieve high accuracy and low drift. It supports both sourcing and sinking up to 5mA while maintaining regulation across input voltages from 3V to 18V.
Its design enables operation as either a positive reference (VOUT = +2.5V) or negative reference (VOUT = –2.5V) with identical performance, leveraging dual-polarity capability without external components. Thermal hysteresis is minimized to 40ppm over –40°C to 85°C cycling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5V ±0.1% (±2.5mV) at 25°C - ensures baseline accuracy for 12-bit ADCs without calibration |
| Temp Coefficient | 25ppm/°C max (–40°C to 85°C) - limits drift to ±200µV over full industrial range |
| Supply Current | 60µA max - enables >1-year battery life in 10µA-sleep systems with periodic measurement |
| Dropout Voltage | 120mV max at 5mA source - allows operation from 2.62V input, compatible with single Li-ion cells |
| Output Noise | 32µVP-P (0.1–10Hz) - supports <16-bit resolution in low-frequency precision measurements |
| Hysteresis | 40ppm (–40°C to 85°C) - guarantees repeatable output after thermal cycling in field-deployed sensors |
| Operating Temp | –40°C to 125°C - qualified for under-hood automotive and industrial control environments |
Pinout & Package
Package: 6-Lead Plastic TSOT-23 (1mm height), RoHS-compliant, lead-free finish. Pin 1 marked by dot; pins 3 and 5 are DNC (Do Not Connect).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VOUT | Regulated 2.5V output; capable of sourcing/sinking up to 5mA with <0.1% load regulation error |
| 2 | VIN | Input supply (3V–18V); dropout as low as 120mV enables ultra-low-voltage operation |
| 3 | DNC | No internal connection; must be left floating or grounded per layout best practices |
| 4 | GND | Analog ground reference; separate from power ground in mixed-signal designs to minimize noise coupling |
| 5 | DNC | No internal connection; no routing or stitching required |
| 6 | GND | Second ground terminal; improves thermal dissipation and reduces ground bounce in high-speed sampling |
Key Features
| Feature | Design Value |
|---|---|
| Micropower operation | 60µA max supply current enables multi-year battery life in portable instrumentation |
| Bipolar reference capability | Sinks and sources current equally - supports ±2.5V reference generation without external op-amps |
| Low thermal hysteresis | 40ppm over –40°C to 85°C cycling - eliminates calibration drift in outdoor sensor nodes |
| Wide input voltage range | Operates from 3V to 18V - accommodates unregulated supplies and varying battery states |
| Guaranteed operation to 125°C | Functional at junction temperatures up to 150°C - suitable for engine control units and motor drives |
Applications
| Handheld Instruments | Negative Voltage References |
|---|---|
Use Scenario: Portable multimeters and handheld DMMs requiring stable 2.5V reference for 16-bit SAR ADCs. IC Role / Device Role / Timing Role: Primary voltage reference for analog front-end; provides excitation for precision resistor measurement bridges. Use Value: ±0.1% accuracy and 25ppm/°C drift ensure measurement repeatability across ambient temperature swings without recalibration. | Use Scenario: Industrial PLC analog input modules needing –2.5V reference for bipolar signal conditioning. IC Role / Device Role / Timing Role: Negative-series reference generating –2.5V from single +5V rail using external resistor network. Use Value: Identical sourcing/sinking specs and noise performance as positive mode eliminate need for separate negative-reference ICs. |
| Industrial Control Systems | Data Acquisition Systems |
Use Scenario: Temperature transmitters in oil & gas field instruments operating at –40°C to 85°C. IC Role / Device Role / Timing Role: Reference for 4–20mA loop-powered transmitter DACs and sensor signal chains. Use Value: Guaranteed operation to 125°C junction temperature and 40ppm hysteresis ensure long-term stability in thermally cycled enclosures. | Use Scenario: High-resolution environmental monitoring nodes measuring pH, dissolved oxygen, or strain gauges. IC Role / Device Role / Timing Role: Low-noise (32µVP-P) reference for 24-bit delta-sigma ADCs in battery-powered sensor hubs. Use Value: Micropower consumption extends operational life; low dropout enables use with buck-boost converters in variable solar/battery inputs. |
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 max, 50µA supply current, SOT-23-3 | Lower accuracy and higher drift; 3-pin package lacks sink capability and second ground | Select when cost sensitivity outweighs precision and bipolar operation requirements |
| ADR3425ARJZ-R7 | 2.5V, ±0.1% initial accuracy, 10ppm/°C max, 120µA supply current, SOT-23-5 | Lower drift but double supply current; no sink capability; requires external compensation for negative reference | Select when ultra-low drift is mandatory and power budget allows 2× current draw |
Compared with REF3025AIDBZR, LT1790BCS6-2.5#TRMPBF offers tighter accuracy and bipolar operation at lower current; compared with ADR3425ARJZ-R7, it trades 15ppm/°C higher drift for 60µA lower quiescent current and integrated sink functionality-critical for compact, dual-rail sensor interfaces.
Availability
LT1790BCS6-2.5#TRMPBF is available at Aetrix Electronics and suitable for handheld instruments, industrial control systems, data acquisition systems, and battery-operated equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT1790BCS6-2.5#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, 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 specifically for micropower, high-accuracy voltage references in space-constrained, battery-sensitive applications-emphasizing low dropout, bipolar operation, and minimal thermal hysteresis.
FAQ
What is the maximum load current the LT1790BCS6-2.5#TRMPBF can source or sink while maintaining regulation?
The LT1790BCS6-2.5#TRMPBF can source or sink up to 5mA while maintaining output voltage regulation within specified limits. At 5mA source, dropout voltage is ≤120mV; at 3mA sink, it is ≤250mV. Load regulation is specified as 80ppm/mA (source) and 70ppm/mA (sink), ensuring <±1µV/mA deviation in precision applications.
Does the LT1790BCS6-2.5#TRMPBF require external capacitors for stability?
Yes, the LT1790BCS6-2.5#TRMPBF requires a minimum 1µF ceramic output capacitor (X7R or better) placed close to the VOUT and GND pins for stability and optimal noise performance. Input capacitance is not strictly required but recommended (0.1µF) for transient suppression. Layout guidelines specify short traces and solid ground plane beneath the TSOT-23 package.
Can the LT1790BCS6-2.5#TRMPBF be used as a negative voltage reference, and how is it configured?
Yes, the LT1790BCS6-2.5#TRMPBF can operate as a negative voltage reference (–2.5V) by connecting its VIN to system ground and its VOUT to the negative rail. It sinks current in this configuration and maintains the same ±0.1% accuracy, 25ppm/°C drift, and 32µVP-P noise as in positive mode-no external components needed beyond the output capacitor.
What is the long-term drift specification for the LT1790BCS6-2.5#TRMPBF, and how is it measured?
The LT1790BCS6-2.5#TRMPBF exhibits 50ppm/√kHr long-term drift, measured over 1000+ hours under bias at 125°C. This logarithmic aging behavior means most drift occurs early in life; after 1000 hours, further change slows significantly. Board-level stress from soldering and CTE mismatch contributes more than intrinsic silicon aging.
Is the LT1790BCS6-2.5#TRMPBF pin-compatible with other members of the LT1790 family?
Yes, all LT1790 variants-including LT1790ACS6-2.5#TRMPBF, LT1790BIS6-2.5#TRMPBF, and LT1790BCS6-2.5#TRMPBF-share identical 6-lead TSOT-23 pinout and footprint. Only the grade (A/B) and temperature range (C/I) differ; electrical specifications scale accordingly, allowing drop-in replacement where accuracy and temp range requirements align.
LT1790BCS6-2.5#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):
- 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#TRMPBF FAQ
1.How can I place an order for LT1790BCS6-2.5#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1790BCS6-2.5#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 LT1790BCS6-2.5#TRMPBF reliable?
The price and inventory of LT1790BCS6-2.5#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1790BCS6-2.5#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT1790BCS6-2.5#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1790BCS6-2.5#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1790BCS6-2.5#TRMPBF?
LT1790BCS6-2.5#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1790BCS6-2.5#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 LT1790BCS6-2.5#TRMPBF?
For technical support, including LT1790BCS6-2.5#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1790BCS6-2.5#TRMPBF requirements.
6.How does Aetrix verify that LT1790BCS6-2.5#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT1790BCS6-2.5#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 LT1790BCS6-2.5#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT1790BCS6-2.5#TRMPBF?
All LT1790BCS6-2.5#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1790BCS6-2.5#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 LT1790BCS6-2.5#TRMPBF part is unused and in its original packaging.
Return procedure for LT1790BCS6-2.5#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT1790BCS6-2.5#TRMPBF Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
-
LM4040CYM3-2.5-TR
Microchip Technology
-
LM4040CYM3-4.1-TR
Microchip Technology
-
LM4040EIM3-2.5/NOPB
Texas Instruments
-
AZ431LBNTR-G1
Diodes Incorporated
-
LM4040D20IDBZR
Texas Instruments
-
LM4041DIM3-ADJ/NOPB
Texas Instruments
-
LM4040DIM3X-2.5/NOPB
Texas Instruments
-
LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
