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Analog Devices Inc. LT1790BIS6-5#TRMPBF
- Part No.:
- LT1790BIS6-5#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LT1790BIS6-5#TRMPBF.pdf
- Description:
- IC VREF SERIES 0.1% TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:986
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Product details
Overview
LT1790BIS6-5#TRMPBF from Analog Devices (formerly Linear Technology) is a micropower, low-dropout, precision series voltage reference in TSOT-23-6 package, delivering 5.000 V ±0.1% initial accuracy, 25 ppm/°C max temperature coefficient, and 60 µA max supply current. It operates from –40°C to 85°C and supports both sourcing and sinking up to 5 mA, making it ideal for high-accuracy ADC/DAC biasing in battery-powered data acquisition systems.
For engineers reviewing the LT1790BIS6-5#TRMPBF datasheet, LT1790BIS6-5#TRMPBF pinout, LT1790BIS6-5#TRMPBF application, or LT1790BIS6-5#TRMPBF equivalent, key selection criteria include guaranteed industrial-temperature operation, sub-100 µA quiescent current, low thermal hysteresis (40 ppm), dropout voltage under 250 mV at 5 mA sink, and compatibility with negative-reference configurations.
Technical Context
The LT1790BIS6-5#TRMPBF uses curvature-compensated bandgap architecture with post-package trimming of thin-film resistors to achieve tight initial accuracy and low drift. Its internal design enables stable operation with output capacitance as low as 0.47 µF and supports bidirectional current flow-sourcing for positive references and sinking for negative reference topologies.
It features guaranteed functional operation from –40°C to 125°C, with specified performance over –40°C to 85°C. The device maintains <220 ppm/V line regulation and <300 ppm/mA load regulation across its full input range (up to 18 V), enabling robust use in varying supply conditions without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000 V ±0.1% (±5 mV absolute tolerance at 25°C) |
| Temp Coefficient | 25 ppm/°C max (≤125 µV drift over –40°C to 85°C) |
| Supply Current | 60 µA max (enables >10-year battery life in µA-level systems) |
| Dropout Voltage | 250 mV max at 5 mA sink (supports operation with VIN as low as 5.25 V) |
| Operating Temp | –40°C to 85°C (industrial-grade qualification, functional to 125°C) |
| Thermal Hysteresis | 40 ppm typical (–40°C to 85°C cycling; critical for metrology repeatability) |
| Output Noise | 80 µVP-P (0.1–10 Hz); 118 µVRMS (10 Hz–1 kHz) |
Pinout & Package
LT1790BIS6-5#TRMPBF is housed in a 6-lead Plastic TSOT-23 package (1 mm profile), marked "LTQC", with lead-free finish and tape-and-reel packaging (#TRMPBF = 500-unit reel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VOUT | Regulated 5.000 V output; must be bypassed with ≥1 µF ceramic capacitor for stability |
| 2 | DNC | No-connect terminal; left floating per datasheet (not internally tied) |
| 3 | VIN | Input supply (2.6 V to 18 V); dropout behavior defined relative to VOUT |
| 4 | GND | Analog ground reference; requires low-impedance PCB connection |
| 5 | GND | Second ground terminal; improves PSRR and thermal stability when both grounded |
| 6 | DNC | No-connect terminal; left floating per datasheet (not internally tied) |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional current capability | Sources up to 5 mA and sinks up to 3 mA-enables true negative-reference operation (e.g., –5 V) without external components |
| Curvature-compensated bandgap | Reduces temperature-induced nonlinearity, achieving 25 ppm/°C max drift without external trimming |
| Post-package trimming | Thin-film resistor adjustment after assembly ensures ±0.1% initial accuracy and low hysteresis (40 ppm) |
| Low-noise, low-drift architecture | 80 µVP-P (0.1–10 Hz) noise and 50 ppm/√kHr long-term drift support precision metrology applications |
| Wide input range & low IQ | Operates from 2.6 V to 18 V with only 60 µA max supply current-ideal for single-cell Li-ion or multi-cell systems |
Applications
| Handheld Data Loggers | Negative Reference Circuits |
|---|---|
Use Scenario: Portable environmental sensor node logging temperature, humidity, and pressure with 16-bit SAR ADC. IC Role / Device Role / Timing Role: Provides stable 5.000 V reference for ADC VREF pin and DAC output scaling. Use Value: ±0.1% initial accuracy and 25 ppm/°C drift ensure <0.02% total unadjusted error over operating temperature, eliminating field recalibration. | Use Scenario: Bipolar signal conditioning stage requiring precise –5 V rail for op-amp biasing and level-shifting. IC Role / Device Role / Timing Role: Configured as sinking reference with external resistor to generate regulated –5 V output. Use Value: Bidirectional current capability allows direct negative reference generation without additional regulators or charge pumps-reducing BOM count and board area. |
| Industrial PLC Analog Inputs | Portable Medical Instrumentation |
Use Scenario: 4–20 mA loop-powered transmitter with integrated 24-bit ΣΔ ADC. IC Role / Device Role / Timing Role: Supplies excitation reference for RTD/thermocouple front-end and ADC reference simultaneously. Use Value: Low 60 µA supply current minimizes loop burden; 40 ppm hysteresis ensures repeatable calibration across thermal cycles during factory test. | Use Scenario: Battery-powered ECG monitor requiring ultra-low-power, high-accuracy analog front-end. IC Role / Device Role / Timing Role: Precision reference for instrumentation amplifier gain-setting and ADC conversion. Use Value: 80 µVP-P low-frequency noise prevents baseline wander in sub-Hz biopotential signals; 125°C functional rating supports sterilization margin. |
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 | 5.0 V output, ±0.1% initial accuracy, 30 ppm/°C max drift, 120 µA max IQ, SOT-23-5 | Single-supply only (no sinking), higher quiescent current, no dual-GND pins | Choose if board space is constrained and negative reference not required; verify PSRR and noise specs for signal chain sensitivity. |
| REF5050AIDR | 5.0 V output, ±0.05% initial accuracy, 3 ppm/°C max drift, 950 µA IQ, SOIC-8 | Higher accuracy and lower drift but 15× higher supply current and larger package | Choose for metrology-grade systems where drift dominates error budget and power is secondary; not suitable for battery operation. |
Compared with ADR3450ARJZ-R7, LT1790BIS6-5#TRMPBF offers sinking capability and lower IQ for bipolar designs; compared with REF5050AIDR, it trades ultimate precision for 15× lower power and TSOT-23 footprint-making it optimal for portable, industrial, and dual-polarity applications where µA-level supply current is mandatory.
Availability
LT1790BIS6-5#TRMPBF is available at Aetrix Electronics and suitable for handheld instruments, industrial control systems, battery-operated equipment, and data acquisition systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT1790BIS6-5#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, low-drift voltage referencing in space-constrained, battery-sensitive applications-emphasizing industrial temperature operation, low hysteresis, and bidirectional current handling.
FAQ
What is the guaranteed operating temperature range for LT1790BIS6-5#TRMPBF?
The LT1790BIS6-5#TRMPBF is fully specified over –40°C to +85°C (industrial grade). It remains functional up to +125°C, though parameters like output voltage shift are characterized only to 85°C per datasheet limits. This makes LT1790BIS6-5#TRMPBF suitable for harsh-environment deployments including factory automation and outdoor instrumentation.
Can LT1790BIS6-5#TRMPBF be used as a negative voltage reference?
Yes-LT1790BIS6-5#TRMPBF can sink up to 3 mA, enabling direct implementation of a –5.000 V reference using a simple external resistor configuration (per Figure 7 in the datasheet). Unlike most positive-only references, LT1790BIS6-5#TRMPBF maintains the same ±0.1% accuracy and 25 ppm/°C drift in negative mode, eliminating need for separate negative-reference ICs.
What is the minimum input voltage required for LT1790BIS6-5#TRMPBF to regulate at 5 V?
At zero load, LT1790BIS6-5#TRMPBF requires only 5.05 V input (50 mV dropout). Under 5 mA sourcing, dropout rises to 120 mV (VIN ≥ 5.12 V); under 3 mA sinking, it reaches 250 mV (VIN ≥ 5.25 V). These low dropout values allow LT1790BIS6-5#TRMPBF to operate efficiently from single Li-ion cells (3.0–4.2 V) when configured as a negative reference, or from low-headroom supplies in multi-rail systems.
How does LT1790BIS6-5#TRMPBF achieve low thermal hysteresis?
LT1790BIS6-5#TRMPBF achieves 40 ppm typical hysteresis (–40°C to 85°C) through mechanical stress mitigation: curvature-compensated bandgap core design, symmetric die layout, and post-package laser trimming of thin-film resistors. This minimizes differential expansion effects between silicon and package-critical for applications requiring repeatable calibration after thermal cycling, such as portable test equipment and field-deployed sensors.
Is an output capacitor required for LT1790BIS6-5#TRMPBF stability?
Yes-a minimum 1 µF ceramic capacitor is required at the VOUT pin for stability and optimal noise performance. The datasheet confirms stable operation with 0.47 µF to 4.7 µF; smaller values increase output impedance above 100 Hz and degrade PSRR. For LT1790BIS6-5#TRMPBF, omitting the capacitor risks oscillation and increased noise, especially under dynamic load conditions common in data acquisition systems.
LT1790BIS6-5#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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-6
LT1790BIS6-5#TRMPBF FAQ
1.How can I place an order for LT1790BIS6-5#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1790BIS6-5#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 LT1790BIS6-5#TRMPBF reliable?
The price and inventory of LT1790BIS6-5#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1790BIS6-5#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT1790BIS6-5#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1790BIS6-5#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1790BIS6-5#TRMPBF?
LT1790BIS6-5#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1790BIS6-5#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 LT1790BIS6-5#TRMPBF?
For technical support, including LT1790BIS6-5#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1790BIS6-5#TRMPBF requirements.
6.How does Aetrix verify that LT1790BIS6-5#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT1790BIS6-5#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 LT1790BIS6-5#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT1790BIS6-5#TRMPBF?
All LT1790BIS6-5#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1790BIS6-5#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 LT1790BIS6-5#TRMPBF part is unused and in its original packaging.
Return procedure for LT1790BIS6-5#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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