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Analog Devices Inc. LT6650IS5#TRMPBF
- Part No.:
- LT6650IS5#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
LT6650IS5#TRMPBF.pdf
- Description:
- IC VREF SERIES 1% TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,999
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Product details
Overview
LT6650IS5#TRMPBF from Analog Devices (formerly Linear Technology) is a micropower, low-voltage 400mV series voltage reference with integrated rail-to-rail buffer amplifier in a 5-lead TSOT-23 package. It operates from 1.4V to 18V supply, draws only 5.6µA typical quiescent current, delivers ±200µA output drive, and maintains ±1% max accuracy over –40°C to 85°C - ideal for battery-powered instrumentation and industrial sensor signal chains.
For engineers reviewing the LT6650IS5#TRMPBF datasheet, LT6650IS5#TRMPBF pinout, LT6650IS5#TRMPBF application, or LT6650IS5#TRMPBF equivalent, key selection criteria include its 400mV nominal output, post-package trimming for accuracy, sink/source capability, external resistor scalability up to supply rail, and guaranteed operation across –40°C to 85°C with 30ppm/°C tempco.
Technical Context
The LT6650IS5#TRMPBF integrates a precision 400mV bandgap reference core with a unity-gain rail-to-rail output buffer, enabling both series and shunt reference configurations. Its feedback (FB) pin allows precise external resistor scaling of the output voltage while maintaining stability with ≥1µF output capacitance.
Designed using bipolar process technology, it features ESD protection diodes on all pins, supports indefinite short-circuit conditions, and tolerates input voltages up to 20V relative to GND. The DNC pin (Pin 3) is internally connected for post-package trim and must remain unconnected in circuit layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 400mV ±1% over –40°C to 85°C - enables accurate low-voltage ADC/DAC biasing and sensor excitation |
| Supply Current | 5.6µA typical at 5V - extends battery life in portable systems beyond 10 years at µA-level loads |
| Output Drive | ±200µA sourcing/sinking - supports direct interface to op-amp inputs, comparator references, and low-power ADCs without external buffering |
| Tempco | 30ppm/°C max - ensures <±0.3% drift over full operating range, critical for precision measurement front-ends |
| Line Regulation | 1–6mV over 1.4V–18V input - maintains stable reference despite battery discharge or unregulated supply variation |
| Load Regulation | ±0.4mV max over ±200µA load - minimizes error when driving varying analog loads |
| Dropout Voltage | 75mV min at 1.8V input - allows operation down to near-1.4V supply, supporting single-cell LiFePO₄ or alkaline systems |
| Output Noise | 20µVP-P (0.1Hz–10Hz), 23µVRMS (10Hz–1kHz) - preserves SNR in high-resolution data acquisition |
Pinout & Package
LT6650IS5#TRMPBF is housed in a 5-lead ThinSOT™ (TSOT-23) package: 1.00mm height, 2.90mm × 1.60mm footprint, JEDEC MO-193 compliant. Pin 3 (DNC) is internally trimmed and must be left floating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (FB) | Feedback Input | Connects to resistor divider midpoint to set scaled output voltage; bias current ≤15nA avoids gain error |
| Pin 2 (GND) | Analog Ground | Reference return path; must be low-impedance and separated from digital ground to minimize noise coupling |
| Pin 3 (DNC) | Do Not Connect | Internally tied to trimming circuitry; floating connection required to preserve factory calibration |
| Pin 4 (IN) | Positive Supply | Accepts 1.4V–18V input; requires ≥0.1µF bypass capacitor, ≥1µF recommended for noisy sources |
| Pin 5 (OUT) | Reference Output | Delivers buffered 400mV (or scaled value); stable with ≥1µF capacitive load; sinks/sources ±200µA |
Key Features
| Feature | Design Value |
|---|---|
| Micropower Operation | 5.6µA supply current enables >10-year battery life in always-on IoT sensors and handheld meters |
| Externally Adjustable Output | Two-resistor feedback network scales output from 400mV to within 350mV of supply rail - eliminates need for multiple fixed references |
| Rail-to-Rail Buffer | Output swings within 10mV of supply rails - supports low-voltage ADCs (e.g., 1.8V SAR) without headroom loss |
| Shunt-Configurable Mode | Operates as 2-terminal adjustable Zener (positive or negative) using external bias resistor - replaces discrete Zener + op-amp combos |
| Post-Package Trim | Factory-trimmed 400mV output achieves ±1% max error over temperature - reduces system calibration burden |
| Wide Temp Range Support | Specified for –40°C to 85°C (I-grade) - qualified for industrial control, automotive cabin, and outdoor instrumentation |
Applications
| Battery-Powered Instrumentation | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Portable multimeter or handheld gas detector powered by two AA cells (1.8–3.2V). IC Role / Device Role / Timing Role: Provides stable 400mV reference for 16-bit sigma-delta ADC and low-noise instrumentation amplifier. Use Value: 5.6µA quiescent current extends battery life to >5 years; 20µVP-P low-frequency noise preserves measurement resolution. | Use Scenario: 4–20mA loop-powered pressure transmitter in factory automation. IC Role / Device Role / Timing Role: Serves as precision excitation source for bridge sensors and reference for DAC-driven current output stage. Use Value: ±200µA drive capability directly biases Wheatstone bridges; ±1% accuracy over –40°C to 85°C ensures calibration stability across ambient shifts. |
| Data Acquisition Front-Ends | Negative Reference Generation |
Use Scenario: Isolated 24-bit data logger capturing thermocouple and RTD signals in energy monitoring systems. IC Role / Device Role / Timing Role: Supplies low-drift reference to programmable gain instrumentation amplifier and SAR ADC driver. Use Value: 30ppm/°C tempco limits full-scale error to <±0.07% over industrial temperature range; rail-to-rail buffer interfaces cleanly with 1.8V ADC inputs. | Use Scenario: Bipolar power supply monitor in telecom base station with ±12V rails. IC Role / Device Role / Timing Role: Configured as adjustable negative shunt reference to generate –400mV or scaled negative voltage for comparator thresholds. Use Value: Shunt mode operation enables simple 2-terminal negative reference without dual supplies; FB pin allows precise scaling to match system offset requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1460ACS8-4.096#TRPBF | Fixed 4.096V output; 0.05% initial accuracy; 10ppm/°C tempco; 35µA supply current | Higher voltage, higher accuracy, but not scalable and consumes 6× more current | Select when fixed 4.096V is required for 12-bit+ ADCs and ultra-low tempco outweighs power penalty |
| REF3312AIDBZR | Fixed 1.2V output; 0.1% initial accuracy; 50ppm/°C tempco; 3.8µA supply current; SC70-3 package | Lower voltage, lower power, smaller package, but no adjustability and wider tempco | Select for space-constrained, ultra-low-power designs needing only 1.2V and where ±0.5% total error is acceptable |
Compared with LT1460ACS8-4.096#TRPBF and REF3312AIDBZR, the LT6650IS5#TRMPBF uniquely combines micropower operation (5.6µA), 400mV low-voltage output, external scalability, and ±200µA drive - making it the only choice for battery-powered systems requiring sub-1V adjustable references with active load support.
Availability
LT6650IS5#TRMPBF is available at Aetrix Electronics and suitable for battery-operated instrumentation, industrial sensor signal conditioning, and data acquisition front-ends requiring stable component supply with guaranteed long-term availability.
Supply support for LT6650IS5#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. Linear pioneered high-performance voltage references and power management ICs for demanding industrial and instrumentation applications.
The LT6650IS5#TRMPBF belongs to Linear's micropower voltage reference family, designed specifically for ultra-low-power, wide-supply-range applications where traditional references fail - including single-cell battery systems, portable test equipment, and harsh-environment sensor nodes.
FAQ
What is the maximum output voltage achievable with the LT6650IS5#TRMPBF?
The LT6650IS5#TRMPBF can scale its 400mV reference up to within 350mV of the supply voltage (VIN) using external resistors RF and RG. For example, with VIN = 5V, the maximum output is approximately 4.65V. This scalability is enabled by the internal rail-to-rail buffer amplifier and FB pin architecture, allowing flexible design without multiple fixed-reference SKUs.
Can the LT6650IS5#TRMPBF operate from a 1.4V supply while delivering full performance?
Yes, the LT6650IS5#TRMPBF is fully specified to operate from 1.4V to 18V. At 1.4V supply, it delivers 400mV output with ±1% accuracy over –40°C to 85°C, draws only ~5.6µA, and maintains stability with ≥1µF output capacitance. Dropout is 75mV minimum, ensuring reliable regulation even at the lowest valid input voltage.
How does the DNC pin (Pin 3) affect LT6650IS5#TRMPBF functionality?
The DNC pin (Pin 3) on the LT6650IS5#TRMPBF is internally connected to the post-package trimming circuitry and must remain unconnected in all PCB layouts. Connecting it risks altering the factory-calibrated 400mV output voltage and degrading accuracy. Its presence enables the ±1% max output tolerance without requiring laser trimming during wafer sort.
Is the LT6650IS5#TRMPBF suitable for negative reference applications?
Yes, the LT6650IS5#TRMPBF can be configured as an adjustable negative shunt reference by connecting the IN pin to a negative supply (e.g., –VS), grounding the OUT pin through RG, and feeding back through RF - generating VOUT = –0.4V × (1 + RF/RG). This configuration leverages its bidirectional output drive and rail-to-rail buffer, eliminating need for separate negative reference ICs.
What output capacitor value is required for stable operation of the LT6650IS5#TRMPBF?
The LT6650IS5#TRMPBF requires a minimum 1µF output capacitor connected between OUT and GND for guaranteed stability across all operating conditions. Larger values (e.g., 10µF) improve load transient response and reduce output impedance at higher frequencies. Ceramic or tantalum capacitors are recommended; ESR should be <1Ω to avoid peaking.
LT6650IS5#TRMPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 0.4V
- Voltage - Output (Max):
- -
- Current - Output:
- 200 µA
- Tolerance:
- ±1%
- Temperature Coefficient:
- 30ppm/°C Typical
- Noise - 0.1Hz to 10Hz:
- 20µVp-p
- Noise - 10Hz to 10kHz:
- 23µVrms
- Voltage - Input:
- 1.4V ~ 18V
- Current - Supply:
- 15µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-5
LT6650IS5#TRMPBF FAQ
1.How can I place an order for LT6650IS5#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT6650IS5#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 LT6650IS5#TRMPBF reliable?
The price and inventory of LT6650IS5#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT6650IS5#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT6650IS5#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT6650IS5#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT6650IS5#TRMPBF?
LT6650IS5#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT6650IS5#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 LT6650IS5#TRMPBF?
For technical support, including LT6650IS5#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT6650IS5#TRMPBF requirements.
6.How does Aetrix verify that LT6650IS5#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT6650IS5#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 LT6650IS5#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT6650IS5#TRMPBF?
All LT6650IS5#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT6650IS5#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 LT6650IS5#TRMPBF part is unused and in its original packaging.
Return procedure for LT6650IS5#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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