My Inquiry
My Account
Analog Devices Inc. LT1790BIS6-2.5#TRMPBF
- Part No.:
- LT1790BIS6-2.5#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LT1790BIS6-2.5#TRMPBF.pdf
- Description:
- IC VREF SERIES 0.1% TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,613
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT1790BIS6-2.5#TRMPBF from Analog Devices (formerly Linear Technology) is a micropower, low-dropout, 2.5V series voltage reference in a 6-lead TSOT-23 package, rated for –40°C to 85°C operation. It delivers ±0.1% initial accuracy, 25ppm/°C max temperature coefficient, 60µA max supply current, and supports both sourcing and sinking up to 5mA while maintaining <250mV dropout at full load - ideal for precision ADC/DAC biasing in battery-powered instrumentation.
For engineers reviewing the LT1790BIS6-2.5#TRMPBF datasheet, LT1790BIS6-2.5#TRMPBF pinout, LT1790BIS6-2.5#TRMPBF application, or LT1790BIS6-2.5#TRMPBF equivalent, key selection criteria include guaranteed industrial-temperature performance, curvature-compensated TC stability, post-package trimming for hysteresis reduction, and compatibility with negative-reference configurations using external resistors.
Technical Context
The LT1790BIS6-2.5#TRMPBF employs curvature-compensated bandgap architecture with trimmed thin-film resistors to achieve low drift and high DC accuracy. Its internal design enables stable operation across 2.6V to 18V input range while maintaining output regulation under varying line, load, and temperature conditions.
It features dual-mode operation: as a positive 2.5V reference when connected conventionally, or as a micropower negative reference (e.g., –2.5V) by reversing connections and leveraging its bidirectional current capability - all without sacrificing accuracy or thermal hysteresis performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5V ±0.1% (±2.5mV) at 25°C - ensures direct compatibility with 12-bit ADCs requiring ≤1 LSB error at 2.5V full-scale |
| Temp Coefficient | 25ppm/°C max over –40°C to 85°C - limits drift to ±210ppm (±0.525mV) across full industrial range |
| Supply Current | 60µA max - enables >10-year battery life in 10µA-sleep systems with periodic 2.5V reference activation |
| Dropout Voltage | 250mV max at 3mA sink - allows operation from 2.75V rails, critical for single-cell Li-ion or 3.3V LDO-supplied systems |
| Thermal Hysteresis | 40ppm typical (–40°C to 85°C) - guarantees repeatable calibration after thermal cycling in field-deployed sensors |
| Line Regulation | 220ppm/V max - contributes <0.55mV error over 2.6V–18V input swing, minimizing dependency on upstream regulator stability |
| Load Regulation | 250ppm/mA max (source), 300ppm/mA max (sink) - maintains accuracy under dynamic DAC/ADC reference loading |
Pinout & Package
6-Lead Plastic TSOT-23 (ThinSOT™) package, 1mm profile, lead-free finish, tape-and-reel (500-unit reel with #TRMPBF suffix). Pin 1 marked via dot; pins 3 and 5 are DNC (Do Not Connect).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VOUT | Regulated 2.5V output node - connects directly to ADC REF+ or op-amp reference input; requires 1µF local bypass |
| 2 | GND | Analog ground return - must tie to clean system AGND plane; separates reference current return from digital noise paths |
| 3 | DNC | Internally unconnected - leave floating; no PCB trace or solder mask opening required |
| 4 | VIN | Input supply (2.6V–18V) - accepts wide input range; dropout behavior begins below 2.75V for 2.5V output |
| 5 | DNC | Internally unconnected - leave floating; mechanical pad only, no electrical function |
| 6 | GND | Second ground terminal - improves thermal dissipation and reduces ground impedance; tie to same AGND as Pin 2 |
Key Features
| Feature | Design Value |
|---|---|
| Curvature-compensated bandgap | Reduces temperature-induced nonlinearity, enabling 25ppm/°C max TC without external compensation networks |
| Post-package trimming | Minimizes trim-induced stress hysteresis, delivering 40ppm typical thermal hysteresis vs. >100ppm in untrimmed references |
| Bidirectional current capability | Sinks or sources up to 5mA - permits negative reference generation (e.g., –2.5V) using simple resistor feedback, eliminating need for separate inverting op-amp stage |
| Guaranteed –40°C to 125°C operation | Ensures functional reliability in automotive engine control or industrial motor drive environments where ambient exceeds 85°C |
| Low 0.1Hz–10Hz noise | 32µVP-P - critical for high-resolution weigh-scale or medical sensor front-ends where low-frequency drift dominates error budget |
Applications
| Handheld Instrumentation | Negative Voltage Reference |
|---|---|
Use Scenario: Portable multimeter with 16-bit SAR ADC requiring stable 2.5V reference for autoranging voltage measurements. IC Role / Device Role / Timing Role: Precision 2.5V series reference providing ADC full-scale reference voltage with minimal self-heating and load-dependent drift. Use Value: ±0.1% initial accuracy and 25ppm/°C TC ensure measurement repeatability across battery discharge and ambient temperature shifts without recalibration. | Use Scenario: Bipolar signal conditioning circuit needing –2.5V reference for op-amp level-shifting in data acquisition front-end. IC Role / Device Role / Timing Role: Configured as sinking reference with external resistor divider to generate precise –2.5V rail from single positive supply. Use Value: Eliminates need for isolated DC/DC converter or charge pump; achieves ±0.1% matching to positive 2.5V rail using same device family. |
| Industrial Process Control | Battery-Operated Sensor Node |
Use Scenario: 4–20mA transmitter module operating in harsh factory environments with ambient temperatures from –40°C to 85°C. IC Role / Device Role / Timing Role: Primary voltage reference for DAC generating loop current setpoint; operates continuously from 12–24V supply. Use Value: Guaranteed –40°C to 85°C specification and 40ppm hysteresis ensure long-term calibration stability despite daily thermal cycling in uncontrolled enclosures. | Use Scenario: Wireless environmental sensor node powered by CR2032 coin cell, sampling temperature every 5 minutes using 14-bit delta-sigma ADC. IC Role / Device Role / Timing Role: Low-quiescent 2.5V reference activated only during conversion; draws just 60µA during active reference period. Use Value: 60µA max supply current extends usable battery life beyond 5 years while maintaining 12-bit effective resolution across operating temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR3425ARJZ-R7 | 2.5V, ±0.1% initial accuracy, 30ppm/°C TC, 125µA supply current, SOT-23-5 package | Lacks sink capability; single-GND pin; not qualified for negative reference use | Select when only positive reference needed and higher supply current is acceptable for improved PSRR |
| REF3025AIDBZR | 2.5V, ±0.2% initial accuracy, 50ppm/°C TC, 50µA supply current, SOT-23-3 package | Lower accuracy and TC; no sink capability; smaller footprint but no DNC pins for layout flexibility | Select for cost-sensitive, space-constrained designs where ±0.2% accuracy suffices and negative reference is unnecessary |
Compared with ADR3425ARJZ-R7 and REF3025AIDBZR, the LT1790BIS6-2.5#TRMPBF uniquely supports bidirectional current flow and delivers superior temperature stability (25ppm/°C vs. 30/50ppm/°C) at lower quiescent current than ADR3425 - making it optimal for precision, dual-polarity, and battery-critical applications.
Availability
LT1790BIS6-2.5#TRMPBF is available at Aetrix Electronics and suitable for handheld instrumentation, industrial process transmitters, battery-operated sensor nodes, and precision data acquisition systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT1790BIS6-2.5#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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, formed through the acquisition of Linear Technology in 2017.
The LT1790 family was designed by Linear Technology specifically for micropower, low-drift, low-dropout voltage references in space-constrained, battery-sensitive, and thermally demanding applications - emphasizing post-trim hysteresis reduction and dual-polarity operational flexibility.
FAQ
What is the maximum input voltage rating for the LT1790BIS6-2.5#TRMPBF?
The LT1790BIS6-2.5#TRMPBF has an absolute maximum input voltage rating of 20V, with recommended operating range from 2.6V to 18V. Operation within this range ensures specified dropout, line regulation, and thermal performance. Exceeding 20V may cause permanent damage per Absolute Maximum Ratings.
Can the LT1790BIS6-2.5#TRMPBF be used as a negative voltage reference?
Yes, the LT1790BIS6-2.5#TRMPBF can operate as a negative voltage reference (e.g., –2.5V) by connecting VIN to system ground and VOUT to a negative rail through an external resistor network. Its ability to sink current enables this configuration while maintaining the same ±0.1% accuracy and 25ppm/°C TC as in positive mode.
What is the thermal hysteresis specification for the LT1790BIS6-2.5#TRMPBF?
The LT1790BIS6-2.5#TRMPBF exhibits 40ppm typical thermal hysteresis over a –40°C to 85°C temperature cycle, measured as output voltage shift after cycling between extremes and returning to 25°C. This value is confirmed in the datasheet Note 10 and applies specifically to the B-grade industrial-temperature variant.
Does the LT1790BIS6-2.5#TRMPBF require an output capacitor for stability?
Yes, the LT1790BIS6-2.5#TRMPBF requires a minimum 1µF ceramic output capacitor (as shown in Typical Application schematics) for stability and optimal noise performance. Omitting this capacitor may result in oscillation or increased output noise, particularly under dynamic load conditions.
How does the LT1790BIS6-2.5#TRMPBF compare to the A-grade version in accuracy and temperature coefficient?
The LT1790BIS6-2.5#TRMPBF offers ±0.1% initial accuracy and 25ppm/°C max temperature coefficient, whereas the A-grade LT1790AIS6-2.5#TRMPBF provides tighter ±0.05% accuracy and 10ppm/°C max TC. Both share identical package, temperature range (–40°C to 85°C), and functional capabilities - the B-grade trades minor spec margin for cost efficiency in less demanding applications.
LT1790BIS6-2.5#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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-6
LT1790BIS6-2.5#TRMPBF FAQ
1.How can I place an order for LT1790BIS6-2.5#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1790BIS6-2.5#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 LT1790BIS6-2.5#TRMPBF reliable?
The price and inventory of LT1790BIS6-2.5#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1790BIS6-2.5#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT1790BIS6-2.5#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1790BIS6-2.5#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1790BIS6-2.5#TRMPBF?
LT1790BIS6-2.5#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1790BIS6-2.5#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 LT1790BIS6-2.5#TRMPBF?
For technical support, including LT1790BIS6-2.5#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1790BIS6-2.5#TRMPBF requirements.
6.How does Aetrix verify that LT1790BIS6-2.5#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT1790BIS6-2.5#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 LT1790BIS6-2.5#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT1790BIS6-2.5#TRMPBF?
All LT1790BIS6-2.5#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1790BIS6-2.5#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 LT1790BIS6-2.5#TRMPBF part is unused and in its original packaging.
Return procedure for LT1790BIS6-2.5#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT1790BIS6-2.5#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…
