My Inquiry
My Account
Texas Instruments LM385BXZ-2.5/NOPB
- Part No.:
- LM385BXZ-2.5/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
LM385BXZ-2.5/NOPB.pdf
- Description:
- IC VREF SHUNT 1.5% TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:754
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM385BXZ-2.5/NOPB from Texas Instruments is a micropower 2-terminal band-gap voltage reference delivering a precise 2.5 V output with ±20 mV (±0.8%) initial tolerance, 30 ppm/°C temperature coefficient, and operation over 0°C to 70°C. It functions as a stable low-power reference in portable meters, battery-powered sensors, and precision analog front-ends where supply current must remain below 20 μA.
For engineers reviewing the LM385BXZ-2.5/NOPB datasheet, LM385BXZ-2.5/NOPB pinout, LM385BXZ-2.5/NOPB application, or LM385BXZ-2.5/NOPB equivalent, key selection criteria include its TO-92 package, 20 μA minimum operating current, 0.6 Ω dynamic impedance, wideband noise of 120 μVrms, and compatibility with capacitive loads up to 10 μF without instability.
Technical Context
The LM385BXZ-2.5/NOPB uses a band-gap core with on-chip trimming for tight voltage accuracy and achieves low temperature drift via curvature-compensated design. Its two-terminal architecture eliminates the need for external bias resistors, simplifying layout in space-constrained applications.
Operating across 20 μA–20 mA, it maintains regulation under varying load conditions while exhibiting exceptionally low dynamic impedance (0.6 Ω at 100 μA) and low noise-critical for high-resolution ADC references and precision current sources.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 2.500 V ±20 mV (±0.8%) at 25°C - ensures accurate scaling for 12-bit+ ADCs without calibration. |
| Temperature Coefficient | 30 ppm/°C (X suffix) - limits voltage drift to ≤1.05 mV over 0°C–70°C ambient range. |
| Operating Current Range | 20 μA to 20 mA - supports ultra-low-power sleep modes and higher-current reference buffering. |
| Dynamic Impedance | 0.6 Ω at 100 μA, 20 Hz - minimizes load-induced voltage sag during transient current demands. |
| Wideband Noise | 120 μVrms, 10 Hz–10 kHz - avoids noise-induced errors in precision measurement circuits. |
| Long-Term Stability | 20 ppm after 1000 hours - ensures consistent performance in field-deployed instrumentation. |
Pinout & Package
LM385BXZ-2.5/NOPB is housed in a 3-pin TO-92 plastic package (Package Drawing LP0003A), with leads formed for through-hole mounting. Pin 1 is Anode, Pin 2 is Cathode, and Pin 3 is connected to the die attach pad and may be left floating or tied to Pin 2 per TI recommendation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Current entry point; connects to positive supply rail in standard shunt configuration. |
| Pin 2 | Cathode | Reference output node; provides stable 2.5 V relative to system ground when biased correctly. |
| Pin 3 | Die Attach Pad (DAP) | Internally bonded to substrate; electrically tied to Pin 2 or left unconnected-no functional role in reference operation. |
Key Features
| Feature | Design Value |
|---|---|
| Capacitive Load Tolerance | Stable with ≥10 μF output capacitance-enables direct use with large decoupling caps in noisy environments. |
| Micropower Operation | 20 μA minimum operating current-extends battery life in portable devices beyond shelf-life limits. |
| Low Dynamic Impedance | 0.6 Ω at 100 μA-reduces output voltage variation under dynamic load steps typical in sensor excitation circuits. |
| Hermetic Alternative Available | LM385BZ-2.5/NOPB offers same electrical specs in TO-92 with enhanced moisture resistance for harsh environments. |
| Trimmed Initial Accuracy | ±20 mV tolerance achieved via laser trimming-eliminates need for external calibration in cost-sensitive designs. |
Applications
| Portable Digital Multimeter | Wireless Sensor Node Reference |
|---|---|
Use Scenario: Battery-powered handheld DMM requiring stable 2.5 V reference for 16-bit SAR ADC scaling over 0–70°C. IC Role / Device Role / Timing Role: Shunt voltage reference providing ratiometric accuracy against internal ADC reference. Use Value: 30 ppm/°C TC and 20 μA quiescent current enable >1000-hour battery life and <0.01% full-scale error drift. |
Use Scenario: LoRaWAN soil moisture sensor operating from CR2032 coin cell with 5-year deployment target. IC Role / Device Role / Timing Role: Precision reference for bridge amplifier and sigma-delta ADC in ultra-low-power acquisition cycle. Use Value: 20 μA min operating current allows deep-sleep current budgeting; TO-92 footprint fits compact PCB layout. |
| Calibration Equipment | Industrial Thermocouple Compensator |
Use Scenario: Benchtop calibrator generating traceable 2.5 V outputs for field instrument verification. IC Role / Device Role / Timing Role: Primary voltage standard referenced against metrology-grade standards. Use Value: 20 ppm long-term stability and ±20 mV initial tolerance meet ANSI C12.20 Class 0.1 accuracy requirements. |
Use Scenario: Micropower cold-junction compensator in industrial RTD/thermocouple transmitters. IC Role / Device Role / Timing Role: Stable 2.5 V reference for precision current source driving thermocouple linearization circuitry. Use Value: Low noise (120 μVrms) prevents thermal EMF measurement corruption; TO-92 allows direct mounting near sensor junction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM385BZ-2.5/NOPB | Same electrical specs; TO-92 package with enhanced moisture resistance per MIL-STD-883 Method 1008. | Preferred for outdoor or high-humidity industrial enclosures where long-term reliability under condensation is critical. | Select when environmental robustness outweighs cost sensitivity; identical pinout and footprint. |
| REF3025AIDBZR | 3.6 V max supply, 50 μA typical quiescent current, 25 ppm/°C TC, SOT-23-3 package. | Suitable for systems with higher supply rails and tighter board area constraints; not rated for 0°C–70°C extended temp. | Choose for new designs prioritizing smaller size and lower production cost; requires layout revision due to SOT-23 footprint. |
Compared with LM385BZ-2.5/NOPB, the LM385BXZ-2.5/NOPB trades moisture resistance for lower unit cost; versus REF3025AIDBZR, it delivers superior temperature stability and lower operating current but occupies larger board area.
Availability
LM385BXZ-2.5/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, wireless sensing, calibration equipment, and industrial signal conditioning requiring stable component supply across commercial temperature ranges.
Supply support for LM385BXZ-2.5/NOPB 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
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with over 90 years of innovation in precision analog ICs.
The LM385 family was designed specifically for micropower, high-stability voltage referencing in battery-operated and space-constrained systems-emphasizing low drift, wide current range, and ease of use without external compensation.
FAQ
What is the operating temperature range for LM385BXZ-2.5/NOPB?
The LM385BXZ-2.5/NOPB is specified for operation from 0°C to 70°C, matching the commercial temperature grade of the LM385 series. This range is validated per TI's SNVS743D datasheet and applies to all electrical characteristics unless otherwise noted. The device is not rated for extended industrial or automotive temperature ranges.
Can LM385BXZ-2.5/NOPB drive a 10 μF capacitor directly?
Yes, LM385BXZ-2.5/NOPB is explicitly designed for exceptional capacitive load tolerance-TI confirms stable operation with ≥10 μF output capacitance. This eliminates the need for isolation resistors in applications like battery-powered data loggers where bulk decoupling is required near the reference node.
What is the minimum operating current for LM385BXZ-2.5/NOPB?
The LM385BXZ-2.5/NOPB requires a minimum operating current of 20 μA to maintain regulation within specifications. Below this threshold, output voltage deviates from 2.5 V; typical applications bias it between 50 μA and 1 mA to balance power efficiency and dynamic performance.
How does the LM385BXZ-2.5/NOPB pinout differ from SOIC variants?
LM385BXZ-2.5/NOPB uses a 3-pin TO-92 package with Pin 1 = Anode, Pin 2 = Cathode, and Pin 3 = Die Attach Pad (DAP). SOIC variants (e.g., LM385BXMX-2.5/NOPB) have an 8-pin D package with different pin assignments and require external connections for bias and output-making them incompatible without PCB redesign.
Is LM385BXZ-2.5/NOPB RoHS compliant?
Yes, LM385BXZ-2.5/NOPB is RoHS and Green compliant per TI's PACKAGE OPTION ADDENDUM (30-Apr-2024), with lead finish marked "Call TI" indicating SnAgCu or equivalent Pb-free termination. It meets JEDEC MSL Level-1 rating and is qualified for standard reflow profiles.
LM385BXZ-2.5/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA)
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 20 mA
- Tolerance:
- ±1.5%
- Temperature Coefficient:
- 30ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 120µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 20 µA
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
LM385BXZ-2.5/NOPB FAQ
1.How can I place an order for LM385BXZ-2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM385BXZ-2.5/NOPB 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 LM385BXZ-2.5/NOPB reliable?
The price and inventory of LM385BXZ-2.5/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM385BXZ-2.5/NOPB is usually 5 days.
3.What payment methods are accepted for LM385BXZ-2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM385BXZ-2.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM385BXZ-2.5/NOPB?
LM385BXZ-2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM385BXZ-2.5/NOPB 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 LM385BXZ-2.5/NOPB?
For technical support, including LM385BXZ-2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM385BXZ-2.5/NOPB requirements.
6.How does Aetrix verify that LM385BXZ-2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LM385BXZ-2.5/NOPB 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 LM385BXZ-2.5/NOPB meets industry standards.
7.What is the process for return or replacement of LM385BXZ-2.5/NOPB?
All LM385BXZ-2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM385BXZ-2.5/NOPB, 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 LM385BXZ-2.5/NOPB part is unused and in its original packaging.
Return procedure for LM385BXZ-2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM385BXZ-2.5/NOPB 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…
