My Inquiry
My Account
Texas Instruments LM4051BEM3X-ADJ/NOPB
- Part No.:
- LM4051BEM3X-ADJ/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4051BEM3X-ADJ/NOPB.pdf
- Description:
- IC VREF SHUNT ADJ 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,222
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM4051BEM3X-ADJ/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23-3 package, delivering adjustable 1.24 V to 10 V output with ±0.2% initial accuracy (B-grade), 50 ppm/°C max temperature coefficient, and 20 μVrms noise (10 Hz–10 kHz). It operates from 60 μA to 12 mA and supports industrial (−40°C to +85°C) and extended (−40°C to +125°C) temperature ranges - used in high-accuracy ADC biasing, portable sensor signal conditioning, and battery-powered data loggers.
For engineers reviewing the LM4051BEM3X-ADJ/NOPB datasheet, LM4051BEM3X-ADJ/NOPB pinout, LM4051BEM3X-ADJ/NOPB application, or LM4051BEM3X-ADJ/NOPB equivalent, key selection considerations include its adjustable output range, no-output-capacitor-required stability, low quiescent current, thermal hysteresis of 0.3 mV/V, and compatibility with capacitive loads up to 10 nF.
Technical Context
The LM4051BEM3X-ADJ/NOPB implements a curvature-corrected bandgap shunt reference architecture with internal amplifier feedback. Its adjustable output is set via external resistive divider between cathode and anode, with reference pin sensing the divider midpoint - enabling precise regulation across 1.24 V–10 V while maintaining <1.1 mV output drift over industrial temperature range.
It functions as a two-terminal shunt device requiring only a series current-setting resistor. The cathode serves as output node, anode as ground reference, and pin 3 (FB) as high-impedance feedback input - with typical feedback current of 70–130 nA ensuring minimal loading error in precision divider networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage Range | 1.24 V to 10 V - programmable via external R1/R2 divider; enables flexible system-level voltage scaling without discrete Zener selection. |
| Initial Accuracy (25°C) | ±0.2% (B-grade) - ensures ≤2.5 mV absolute error at 1.25 V output, critical for 12-bit+ ADC reference applications. |
| Tempco (−40°C to +125°C) | 50 ppm/°C max - limits total output drift to ±6.25 mV over full range at 1.25 V, supporting stable operation in automotive under-hood environments. |
| Output Noise (10 Hz–10 kHz) | 20 μVrms - low enough to avoid degrading ENOB in 16-bit SAR ADCs when used as reference source. |
| Operating Current Range | 60 μA to 12 mA - ultra-low minimum current enables use in energy-harvesting systems; 12 mA max supports high-load transient immunity. |
| Dynamic Output Impedance | 0.3 Ω at 1.25 V - ensures minimal load-regulation error (<0.375 mV at 1.25 mA load), improving stability in varying-current sensor interfaces. |
| Thermal Hysteresis | 0.3 mV/V - translates to ≤0.375 mV hysteresis at 1.25 V, preserving repeatability after thermal cycling in field-deployed instrumentation. |
Pinout & Package
SOT-23-3 (DBZ) package: 3.00 mm × 1.30 mm, surface-mount, lead-free (NOPB), rated for 280 mW power dissipation at 25°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Output / Shunt Node | Main regulated output terminal; sinks current to maintain VOUT; connects to series resistor (RS) and load return path. |
| Anode (Pin 2) | Ground Reference | Common return node for feedback network and load; must be connected to system ground for proper regulation. |
| Feedback (Pin 3) | High-Z Reference Input | Senses voltage divider midpoint; draws only 70–130 nA, minimizing divider current error and enabling high-R divider designs. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable with any capacitive load up to 10 nF - eliminates BOM cost and board space for bypass caps in space-constrained wearables and IoT nodes. |
| Adjustable output (1.24–10 V) | Enables single reference part to support multiple rail voltages - reduces inventory count vs. fixed-voltage alternatives like LM4051BEM3X-1.2/NOPB. |
| Low 60 μA min operating current | Permits use in microamp-level systems such as gas sensors and coin-cell-powered meters without compromising regulation. |
| 50 ppm/°C tempco (guaranteed) | Ensures predictable, bounded drift across temperature - simplifies calibration in medical thermistor front-ends and industrial RTD interfaces. |
| Tolerates capacitive loads | Maintains phase margin >45° with 10 nF load - prevents oscillation in DAC output buffers and op-amp reference inputs without added isolation resistors. |
Applications
| Portable Instrumentation | Battery-Powered Data Acquisition |
|---|---|
Use Scenario: Handheld multimeter with dual-range 16-bit ADC measuring 0–10 V and 0–100 mV signals. IC Role / Device Role / Timing Role: Adjustable shunt reference providing precise 2.5 V and 100 mV reference rails via resistor reconfiguration. Use Value: Enables single-component solution for multi-range measurement without switching references; 20 μVrms noise preserves ENOB ≥15.5 bits. | Use Scenario: Wireless environmental sensor node logging temperature/humidity using 12-bit SAR ADC and BLE SoC. IC Role / Device Role / Timing Role: Low-quiescent-current shunt reference powering ADC reference input and analog front-end biasing. Use Value: 60 μA min current allows operation down to 2.7 V supply with coin-cell battery; 50 ppm/°C tempco ensures <±0.5°C measurement error over −20°C to +60°C. |
| Precision Sensor Signal Conditioning | Automotive Body Control Module |
Use Scenario: Strain-gauge bridge amplifier in structural health monitoring system requiring ratiometric 5 V excitation and 2.5 V reference. IC Role / Device Role / Timing Role: Programmable shunt reference generating stable 2.5 V reference synchronized to bridge excitation voltage. Use Value: Adjustable output compensates for gain drift in instrumentation amp; 0.3 mV/V thermal hysteresis prevents calibration drift after vehicle thermal soak cycles. | Use Scenario: Cabin air quality sensor module in automotive BCM operating across −40°C to +105°C ambient. IC Role / Device Role / Timing Role: Temperature-stable shunt reference for CO₂ sensor ADC and microcontroller VREF input. Use Value: Extended temperature rating (−40°C to +125°C) and guaranteed 50 ppm/°C tempco ensure <±1.25 mV reference error at 2.5 V over full automotive range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431ACDBVR | Fixed 2.495 V output; 2% initial tolerance; 50 ppm/°C tempco; requires 1 mA min cathode current. | Not adjustable; higher min current limits use in ultra-low-power systems; lacks sub-2 V capability. | Select TL431ACDBVR only when fixed 2.5 V output suffices and ≥1 mA supply current is available. |
| MAX6008AEUR+T | Fixed 1.25 V output; 0.2% initial accuracy; 30 ppm/°C tempco; SOT-23-3; 100 μA min current. | Non-adjustable; lower tempco but no programmability; higher min current than LM4051BEM3X-ADJ/NOPB's 60 μA. | Choose MAX6008AEUR+T for fixed 1.25 V needs where tighter tempco is prioritized over adjustability and lowest current. |
Compared with TL431ACDBVR and MAX6008AEUR+T, LM4051BEM3X-ADJ/NOPB uniquely combines adjustable output (1.24–10 V), 60 μA min current, and B-grade 0.2% accuracy in SOT-23 - making it optimal for multi-rail, battery-sensitive, and thermally demanding applications where flexibility and efficiency are co-prioritized.
Availability
LM4051BEM3X-ADJ/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered data acquisition, precision sensor signal conditioning, and automotive body control modules requiring stable component supply with consistent parametric performance across production lots.
Supply support for LM4051BEM3X-ADJ/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 company headquartered in Dallas, Texas, designing and manufacturing analog ICs, embedded processors, and digital logic devices for industrial, automotive, and consumer markets.
The LM4051-N product line delivers precision micropower shunt voltage references optimized for space-constrained, low-power, and high-accuracy applications - including portable test equipment, medical sensors, and automotive subsystems requiring stable reference performance across wide temperature ranges.
FAQ
What is the minimum operating current for LM4051BEM3X-ADJ/NOPB across temperature?
The LM4051BEM3X-ADJ/NOPB has a minimum operating current of 60 μA at 25°C, rising to 65 μA over the industrial temperature range (−40°C to +85°C) and 70 μA over the extended range (−40°C to +125°C). This value is specified in the LM4051-ADJ Electrical Characteristics table and applies to all grade variants including the B-grade LM4051BEM3X-ADJ/NOPB.
Can LM4051BEM3X-ADJ/NOPB be used without an external capacitor?
Yes, LM4051BEM3X-ADJ/NOPB is designed to operate stably without any external capacitor - a key feature confirmed in both the "Features" and "Description" sections of the datasheet. It remains stable with capacitive loads up to 10 nF, eliminating the need for output bypassing in most applications, though a 0.1-μF ceramic capacitor on the input is recommended to reduce noise.
What is the maximum output voltage that LM4051BEM3X-ADJ/NOPB can regulate?
The LM4051BEM3X-ADJ/NOPB supports a maximum output voltage of 10 V, as specified in the "Recommended Operating Conditions" table under "Output voltage" for LM4051-ADJ. This limit is enforced by internal design constraints and must not be exceeded to ensure reliable operation and avoid damage.
How does the feedback pin (Pin 3) function in LM4051BEM3X-ADJ/NOPB?
In LM4051BEM3X-ADJ/NOPB, Pin 3 is the feedback (FB) terminal - a high-impedance input (70–130 nA typical) that senses the voltage divider midpoint between cathode and anode. It enables adjustable output by comparing this sensed voltage to the internal 1.212 V reference, allowing precise regulation of VOUT = VREF × (1 + R1/R2).
Is LM4051BEM3X-ADJ/NOPB RoHS-compliant and lead-free?
Yes, LM4051BEM3X-ADJ/NOPB is RoHS-compliant and lead-free, as indicated by the "/NOPB" suffix per Texas Instruments' packaging nomenclature. The device uses matte tin lead finish and meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1), suitable for standard reflow processes without special handling.
LM4051BEM3X-ADJ/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Reference Type:
- Shunt
- Output Type:
- Adjustable
- Voltage - Output (Min/Fixed):
- 1.212V
- Voltage - Output (Max):
- 10 V
- Current - Output:
- 12 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 20µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 70 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4051BEM3X-ADJ/NOPB FAQ
1.How can I place an order for LM4051BEM3X-ADJ/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4051BEM3X-ADJ/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 LM4051BEM3X-ADJ/NOPB reliable?
The price and inventory of LM4051BEM3X-ADJ/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4051BEM3X-ADJ/NOPB is usually 5 days.
3.What payment methods are accepted for LM4051BEM3X-ADJ/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4051BEM3X-ADJ/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4051BEM3X-ADJ/NOPB?
LM4051BEM3X-ADJ/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4051BEM3X-ADJ/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 LM4051BEM3X-ADJ/NOPB?
For technical support, including LM4051BEM3X-ADJ/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4051BEM3X-ADJ/NOPB requirements.
6.How does Aetrix verify that LM4051BEM3X-ADJ/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4051BEM3X-ADJ/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 LM4051BEM3X-ADJ/NOPB meets industry standards.
7.What is the process for return or replacement of LM4051BEM3X-ADJ/NOPB?
All LM4051BEM3X-ADJ/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4051BEM3X-ADJ/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 LM4051BEM3X-ADJ/NOPB part is unused and in its original packaging.
Return procedure for LM4051BEM3X-ADJ/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4051BEM3X-ADJ/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…
