My Inquiry
My Account
Analog Devices Inc. LT1790ACS6-2.5#TRMPBF
- Part No.:
- LT1790ACS6-2.5#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LT1790ACS6-2.5#TRMPBF.pdf
- Description:
- IC VREF SERIES 0.05% TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:7,437
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT1790ACS6-2.5#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 ±0.05% initial accuracy, 10ppm/°C max temperature coefficient, 60µA max supply current, and operates from 2.6V to 18V input across 0°C to 70°C. It is used in precision ADC/DAC biasing and portable instrumentation where stable, low-power reference voltage is critical.
For engineers reviewing the LT1790ACS6-2.5#TRMPBF datasheet, LT1790ACS6-2.5#TRMPBF pinout, LT1790ACS6-2.5#TRMPBF application, or LT1790ACS6-2.5#TRMPBF equivalent, key selection criteria include output accuracy over temperature, dropout voltage at 5mA load, thermal hysteresis performance, and compatibility with negative-reference configurations using sink capability.
Technical Context
The LT1790ACS6-2.5#TRMPBF employs curvature-compensated bandgap architecture with post-package trimming of thin-film resistors to achieve high initial accuracy and low drift. Its internal design supports both sourcing and sinking up to 5mA, enabling bidirectional operation including negative-voltage reference use cases without external components.
It features guaranteed operation from –40°C to 125°C junction temperature, with specified performance over 0°C to 70°C ambient. Dropout voltage is as low as 50mV at zero load and remains ≤120mV at 5mA source current, enabling use in low-headroom battery-powered systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±0.05% (±1.25mV) - ensures precise full-scale calibration for 12-bit+ data converters |
| Tempco | 10ppm/°C max - limits drift to ≤250µV over 0°C–70°C ambient range |
| Supply Current | 60µA max - enables multi-year operation on coin-cell batteries in always-on sensing nodes |
| Dropout Voltage | 120mV max at 5mA source - supports regulation from 2.62V input, ideal for single Li-ion or 3×AA systems |
| Thermal Hysteresis | 40ppm typical (–40°C to 85°C cycle) - maintains repeatability in field-deployed industrial sensors |
| Line Regulation | 220ppm/V max - holds output stable despite ±10% input variation in unregulated supplies |
| Load Regulation | 250ppm/mA max (source), 300ppm/mA max (sink) - accommodates dynamic load changes in mixed-signal SoCs |
Pinout & Package
LT1790ACS6-2.5#TRMPBF is housed in a 6-lead Plastic TSOT-23 package (1mm profile), marked "LTPZ", with pin 1 identified by a dot. The package supports reflow soldering per JEDEC J-STD-020 and is RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Input supply terminal; accepts 2.6V–18V; requires ≥0.1µF local bypass |
| 2 | GND | Analog ground reference; must be connected directly to low-impedance ground plane |
| 3 | DNC | Do Not Connect - internally unused; floating or tied to GND has no effect |
| 4 | VOUT | Precision 2.5V output; capable of sourcing/sinking up to 5mA/3mA respectively |
| 5 | GND | Second ground terminal; improves PSRR and reduces ground bounce in noisy environments |
| 6 | DNC | Do Not Connect - internally unused; floating or tied to GND has no effect |
Key Features
| Feature | Design Value |
|---|---|
| Micropower operation | 60µA max supply current enables >10-year battery life in 20µA average-load IoT endpoints |
| Bidirectional current capability | Sinks up to 3mA and sources up to 5mA - allows direct use as negative reference (e.g., –2.5V) with simple external resistor |
| Low thermal hysteresis | 40ppm typical over –40°C to 85°C cycling - preserves calibration integrity in outdoor or automotive environments |
| Guaranteed wide temp range | Functional from –40°C to 125°C junction - suitable for under-hood or industrial control applications |
| Curvature-compensated bandgap | 10ppm/°C max tempco achieved without external compensation - reduces BOM count and layout complexity |
Applications
| Handheld Instruments | Negative Voltage References |
|---|---|
Use Scenario: Portable multimeter requiring stable 2.5V reference for 16-bit SAR ADC during battery discharge from 3.6V to 2.8V. IC Role / Device Role / Timing Role: Precision voltage reference providing excitation and scaling for analog front-end and ADC conversion. Use Value: Maintains ±0.05% absolute accuracy and <120mV dropout enables accurate measurements down to 2.62V input, extending usable battery life. | Use Scenario: Industrial sensor node generating –2.5V bias for dual-supply op-amp signal conditioning with single 3.3V rail. IC Role / Device Role / Timing Role: Sinking-mode voltage reference establishing precise negative rail from common ground. Use Value: Eliminates need for charge pump or inverting DC/DC converter; achieves –2.5V ±0.1% with only one external resistor and 100µA operating current. |
| Industrial Control Systems | Data Acquisition Systems |
Use Scenario: PLC analog input module measuring 4–20mA loop current with 24-bit ΣΔ ADC, operating in –40°C to 85°C ambient. IC Role / Device Role / Timing Role: Low-drift reference for ADC reference input and DAC output buffer biasing. Use Value: 10ppm/°C tempco and 40ppm hysteresis ensure <0.01% gain error shift over full temperature cycle, meeting SIL-2 accuracy requirements. | Use Scenario: Seismic data logger sampling at 1kHz with 24-bit resolution, powered by lithium-thionyl chloride battery for 5-year deployment. IC Role / Device Role / Timing Role: Primary reference for ADC, DAC, and programmable gain amplifier calibration. Use Value: 60µA supply current and long-term drift of 50ppm/√kHr enable stable baseline over mission lifetime without field recalibration. |
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, 12ppm/°C max tempco, 125µA supply current, SOT-23-5 | Higher supply current and wider accuracy tolerance; no sink capability | Choose when lower cost is prioritized over micropower or bidirectional operation |
| REF3025AIDBZR | 2.5V, ±0.2% initial accuracy, 50ppm/°C max tempco, 50µA supply current, SOT-23-3 | Lower accuracy and higher drift; simpler 3-pin interface but no sink mode | Choose for cost-sensitive, non-critical applications where 0.2% tolerance is acceptable |
Compared with ADR3425ARJZ-R7 and REF3025AIDBZR, the LT1790ACS6-2.5#TRMPBF provides superior initial accuracy (±0.05% vs ±0.1%/±0.2%), lower tempco (10ppm/°C vs 12/50ppm/°C), and unique bidirectional current handling-enabling compact negative-reference designs without added ICs or passive networks.
Availability
LT1790ACS6-2.5#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 and long product lifecycles.
Supply support for LT1790ACS6-2.5#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 technologies.
The LT1790 family was designed specifically for precision, low-power, low-dropout voltage referencing in space-constrained, battery-sensitive applications-emphasizing accuracy retention over temperature, time, and supply variation.
FAQ
What is the maximum input voltage rating for the LT1790ACS6-2.5#TRMPBF?
The LT1790ACS6-2.5#TRMPBF has an absolute maximum input voltage of 20V, with recommended operating range from 2.6V to 18V. Exceeding 20V may cause permanent damage. Operation at 18V is fully characterized and supported across the 0°C to 70°C ambient range, making it suitable for industrial supplies with wide input tolerances.
Can the LT1790ACS6-2.5#TRMPBF be used as a negative voltage reference?
Yes, the LT1790ACS6-2.5#TRMPBF can operate as a negative voltage reference by sinking current. When configured with a resistor from VOUT to a negative rail (e.g., –5V), it regulates –2.5V at VOUT relative to system ground. The datasheet confirms this capability with 100µA minimum sink current requirement and specifies performance for VOUT = –2.5V at 0.1% tolerance.
What is the typical turn-on time of the LT1790ACS6-2.5#TRMPBF?
The typical turn-on time for the LT1790ACS6-2.5#TRMPBF is 700µs when driving a 1µF load capacitor. This value is measured from VIN reaching regulation threshold to VOUT settling within 0.1% of final 2.5V output. Turn-on time increases slightly with larger capacitive loads but remains under 1ms for CLOAD ≤ 2.2µF, supporting fast wake-up in duty-cycled sensor systems.
Does the LT1790ACS6-2.5#TRMPBF require external capacitors for stability?
Yes, the LT1790ACS6-2.5#TRMPBF requires a minimum 0.1µF ceramic capacitor from VIN to GND and a 1µF capacitor from VOUT to GND for stable operation. These values are specified in the Typical Application schematic and validated across temperature and load conditions. Omitting the output capacitor may cause oscillation or degraded load regulation, especially under dynamic current steps.
How does the LT1790ACS6-2.5#TRMPBF handle thermal hysteresis?
The LT1790ACS6-2.5#TRMPBF exhibits 40ppm typical thermal hysteresis over a –40°C to 85°C temperature cycle, measured as output voltage deviation after returning to 25°C. This hysteresis arises from package stress and is minimized via mechanical design and post-trim stabilization. It is significantly lower than standard references (often >100ppm), ensuring repeatable calibration in cyclic thermal environments like outdoor telemetry units.
LT1790ACS6-2.5#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:
- ±0.05%
- Temperature Coefficient:
- 10ppm/°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
LT1790ACS6-2.5#TRMPBF FAQ
1.How can I place an order for LT1790ACS6-2.5#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1790ACS6-2.5#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 LT1790ACS6-2.5#TRMPBF reliable?
The price and inventory of LT1790ACS6-2.5#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1790ACS6-2.5#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT1790ACS6-2.5#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1790ACS6-2.5#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1790ACS6-2.5#TRMPBF?
LT1790ACS6-2.5#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1790ACS6-2.5#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 LT1790ACS6-2.5#TRMPBF?
For technical support, including LT1790ACS6-2.5#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1790ACS6-2.5#TRMPBF requirements.
6.How does Aetrix verify that LT1790ACS6-2.5#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT1790ACS6-2.5#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 LT1790ACS6-2.5#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT1790ACS6-2.5#TRMPBF?
All LT1790ACS6-2.5#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1790ACS6-2.5#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 LT1790ACS6-2.5#TRMPBF part is unused and in its original packaging.
Return procedure for LT1790ACS6-2.5#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT1790ACS6-2.5#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…
