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Analog Devices Inc. LT1389BCS8-5#TRPBF
- Part No.:
- LT1389BCS8-5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1389BCS8-5#TRPBF.pdf
- Description:
- IC VREF SHUNT 0.075% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,176
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Product details
Overview
LT1389BCS8-5#TRPBF from Analog Devices (formerly Linear Technology) is a nanopower precision shunt voltage reference delivering 5.000V nominal output with ±0.075% initial accuracy, 50ppm/°C max temperature coefficient, and 0.75Ω typical reverse dynamic impedance at 1.5µA operating current. It operates from 0.8µA to 10mA, supports capacitive loads without compensation, and targets ultra-low-power precision systems such as portable calibrators and battery-powered data acquisition.
For engineers reviewing the LT1389BCS8-5#TRPBF datasheet, LT1389BCS8-5#TRPBF pinout, LT1389BCS8-5#TRPBF application, or LT1389BCS8-5#TRPBF equivalent, key selection criteria include guaranteed 50ppm/°C drift over 0°C to 70°C, 100µVP-P low-frequency noise (0.1Hz–10Hz), and SO-8 package compatibility with board leakage mitigation requirements.
Technical Context
The LT1389BCS8-5#TRPBF uses trimmed thin-film resistors and advanced curvature correction to achieve stable 5V reference performance across temperature. Its bandgap-based shunt architecture maintains regulation down to 1µA minimum operating current and exhibits no negative resistance regions-ensuring reliable start-up in buffered reference circuits.
It achieves low hysteresis via optimized packaging and process control, and its <1Ω dynamic impedance enables stable operation with up to 0.1µF capacitive load without external compensation. The device is ESD-sensitive (Class 1C) and requires guard-ring layout around DNC pins to suppress board leakage-induced errors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000V nominal, ±0.075% initial accuracy (±3.75mV) at 1.5µA, guaranteed over 0°C to 70°C |
| Tempco | 50ppm/°C maximum (±0.25mV/°C drift over full range), enabling high-stability measurements in unregulated environments |
| Operating Current | 1.5µA typical test condition; functional from 1µA min to 10mA max-supports ultra-low-power sensor nodes |
| Dynamic Impedance | 0.75Ω typical (≤3Ω max) at 1.5µA–2mA, ensuring minimal output perturbation under varying load currents |
| Low-Frequency Noise | 100µVP-P (0.1Hz–10Hz), critical for high-resolution ADC/DAC biasing and precision calibration |
| Reverse Breakdown Change | ≤6mV over 200µA–2mA current range, limiting output shift in variable-current applications |
| Storage Temp Range | –65°C to +150°C, supporting industrial handling and reflow soldering (300°C, 10s) |
Pinout & Package
LT1389BCS8-5#TRPBF is housed in an 8-lead plastic SO (narrow, 0.150") package (LTC DWG #05-08-1610), with 1.27mm pitch, 3.9mm width, and 4.9mm length. Pins 1–4 and 6–7 are DNC (do not connect); only Pin 5 (VOUT) and Pin 8 (GND) are active terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1, 2, 3, 4, 6, 7 | DNC (Do Not Connect) | Internally connected; external connection causes parametric shift or damage-must be isolated with guard ring |
| Pin 5 | VOUT | 5.000V reference output node; requires guard ring trace tied to VOUT to minimize board leakage error |
| Pin 8 | GND | Analog ground reference; must be low-impedance and separate from digital/power grounds to preserve accuracy |
Key Features
| Feature | Design Value |
|---|---|
| Nanopower Operation | Functional down to 1µA supply current-enables multi-year battery life in portable meters and IoT sensors |
| No Output Capacitor Required | Stable with 0µF to 0.1µF capacitive loads-simplifies layout and eliminates BOM cost of compensation capacitor |
| Guaranteed Drift Performance | 50ppm/°C max over 0°C to 70°C-provides predictable error budget for calibration-grade instruments |
| Low Dynamic Impedance | ≤3Ω max ensures <3mV output shift under 1mA load transients-critical for driving ADC reference inputs |
| Guard-Ring Compatible Layout | DNC pins enable guard ring implementation at VOUT potential-reduces board leakage to <1nA, preserving 0.075% accuracy |
Applications
| Portable Calibrators | Precision Regulators |
|---|---|
|
Use Scenario: Handheld field calibrators verifying 4–20mA loop transmitters and multimeters. IC Role / Device Role / Timing Role: Primary 5V reference for DAC-controlled current source and internal ADC. Use Value: ±0.075% initial accuracy and 50ppm/°C drift ensure calibration validity across ambient temperature shifts without recalibration. |
Use Scenario: Low-noise linear regulators powering high-resolution analog front-ends in medical sensors. IC Role / Device Role / Timing Role: Shunt reference setting feedback voltage for adjustable LDO control loop. Use Value: 100µVP-P low-frequency noise prevents signal corruption in sub-16-bit measurement systems. |
| A/D and D/A Converters | Battery-Powered Data Loggers |
|
Use Scenario: Reference for 16-bit SAR ADCs in industrial process monitoring modules. IC Role / Device Role / Timing Role: Stable 5V reference input to ADC, rejecting supply ripple via shunt topology. Use Value: ≤3Ω dynamic impedance minimizes code-dependent reference droop during fast conversions. |
Use Scenario: Long-life environmental data loggers powered by two AAA alkaline cells. IC Role / Device Role / Timing Role: Precision reference for microcontroller's internal ADC and voltage monitor. Use Value: 1µA minimum operating current extends battery life beyond 5 years while maintaining ±0.1% system accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1634BCS8-5#TRPBF | Same 5V output, but 0.05% initial accuracy and 10ppm/°C max tempco; higher 10µA min operating current | Better drift spec suits lab-grade equipment; less suitable for sub-µA battery systems | Select LT1634BCS8-5#TRPBF when drift-critical metrology outweighs ultra-low-power needs |
| REF5050AIDR | 5V series reference with 0.05% initial accuracy, 3ppm/°C max drift, but requires ≥1.2mA supply current | Superior stability for benchtop instruments; incompatible with nanopower architectures | Choose REF5050AIDR only if system can support >1mA quiescent current and needs <3ppm/°C drift |
Compared with LT1389BCS8-5#TRPBF, LT1634BCS8-5#TRPBF offers tighter drift at higher current, while REF5050AIDR delivers lab-grade stability at the cost of 1000× higher supply demand-making LT1389BCS8-5#TRPBF the sole viable option for µA-level precision references.
Availability
LT1389BCS8-5#TRPBF is available at Aetrix Electronics and suitable for portable calibrators, precision regulators, and battery-powered data loggers requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LT1389BCS8-5#TRPBF 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, including voltage references, op amps, and power management ICs, with global manufacturing and quality certification.
The LT1389 family was designed specifically for nanopower, high-accuracy shunt reference applications in portable instrumentation and energy-constrained systems-prioritizing ultra-low current, guaranteed drift, and robust layout tolerance.
FAQ
What is the guaranteed initial voltage accuracy of the LT1389BCS8-5#TRPBF?
The LT1389BCS8-5#TRPBF guarantees ±0.075% initial voltage accuracy (±3.75mV) over the 0°C to 70°C operating temperature range at 1.5µA test current. This is confirmed in the 5V Electrical Characteristics table, where the min/max breakdown voltage is specified as 4.979V to 5.021V under full-range conditions.
Can the LT1389BCS8-5#TRPBF operate without an output capacitor?
Yes, the LT1389BCS8-5#TRPBF is stable with 0µF output capacitance and does not require an external compensation capacitor. It remains stable with capacitive loads up to 0.1µF, as verified in the Typical Performance Characteristics and explicitly stated in the product description.
What is the minimum operating current for LT1389BCS8-5#TRPBF?
The LT1389BCS8-5#TRPBF has a guaranteed minimum operating current of 1µA over the full 0°C to 70°C temperature range. This value is documented in the 5V Electrical Characteristics table under "Minimum Operating Current" with a "G" (guaranteed) flag.
How should DNC pins be handled on the LT1389BCS8-5#TRPBF SO-8 package?
All DNC pins (1, 2, 3, 4, 6, 7) on the LT1389BCS8-5#TRPBF must remain unconnected. To prevent board leakage errors, they must be surrounded by a guard ring tied to VOUT potential-1.5GΩ leakage to a 5V rail would inject 2.5nA and cause a 0.2% output error.
Is LT1389BCS8-5#TRPBF compatible with lead-free reflow soldering?
Yes, the LT1389BCS8-5#TRPBF SO-8 package supports lead-free reflow with a maximum lead temperature of 300°C for 10 seconds, as specified in the Absolute Maximum Ratings. Its plastic body and termination finish comply with JEDEC J-STD-020 moisture sensitivity level 1.
LT1389BCS8-5#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.075%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- 100µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 1 µA
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1389BCS8-5#TRPBF FAQ
1.How can I place an order for LT1389BCS8-5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1389BCS8-5#TRPBF 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 LT1389BCS8-5#TRPBF reliable?
The price and inventory of LT1389BCS8-5#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1389BCS8-5#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1389BCS8-5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1389BCS8-5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1389BCS8-5#TRPBF?
LT1389BCS8-5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1389BCS8-5#TRPBF 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 LT1389BCS8-5#TRPBF?
For technical support, including LT1389BCS8-5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1389BCS8-5#TRPBF requirements.
6.How does Aetrix verify that LT1389BCS8-5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1389BCS8-5#TRPBF 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 LT1389BCS8-5#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1389BCS8-5#TRPBF?
All LT1389BCS8-5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1389BCS8-5#TRPBF, 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 LT1389BCS8-5#TRPBF part is unused and in its original packaging.
Return procedure for LT1389BCS8-5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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