My Inquiry
My Account
Analog Devices Inc./Maxim Integrated LM4050BIX3-2.1-T
- Part No.:
- LM4050BIX3-2.1-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4050BIX3-2.1-T.pdf
- Description:
- PRECISION MICROPOWER SHUNT VREF
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM4050BIX3-2.1-T from Maxim Integrated is a precision 2.048V, 0.2% initial accuracy, 50ppm/°C temperature coefficient shunt voltage reference in a 3-pin SC70 package. It operates over -40°C to +125°C with 60µA–15mA shunt current capability and 28µVRMS wideband noise (10Hz–10kHz), enabling stable reference generation in battery-powered analog signal chains.
For engineers reviewing the LM4050BIX3-2.1-T datasheet, LM4050BIX3-2.1-T pinout, LM4050BIX3-2.1-T application, or LM4050BIX3-2.1-T equivalent, this page delivers verified specifications, validated SC70 pin mapping, confirmed 2.048V reverse breakdown behavior, and real-world design implications for portable instrumentation and high-accuracy ADC/DAC biasing.
Technical Context
The LM4050BIX3-2.1-T implements a laser-trimmed bandgap core with BiCMOS process technology, delivering fixed 2.048V reverse breakdown voltage without requiring external stabilization capacitors. Its shunt architecture sinks load-dependent current through an internal pass element to maintain regulation across 60µA–15mA.
Guaranteed performance includes ±4.0mV (±0.2%) initial tolerance at +25°C, ±15ppm/°C typical temperature coefficient over full range, and low 0.3–0.8Ω dynamic impedance at 1mA/120Hz - enabling stable operation under varying load and temperature conditions in space-constrained systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048V nominal reverse breakdown voltage - precisely matches 12-bit DAC/ADC full-scale reference points and enables direct interface with 2.048V-ranged converters. |
| Initial Accuracy | ±4.0mV (±0.2%) at +25°C - ensures ≤0.2% absolute error before calibration in precision sensor front-ends and data acquisition systems. |
| Tempco | 50ppm/°C max over –40°C to +125°C - contributes ≤±10.2mV drift across full industrial temperature range, critical for uncalibrated field-deployed equipment. |
| Shunt Current Range | 60µA to 15mA - supports ultra-low-power sleep modes (e.g., 60µA IoT sensor nodes) and robust regulation under 15mA load transients. |
| Output Noise | 28µVRMS (10Hz–10kHz) - minimizes added noise floor in 16-bit+ measurement systems where reference noise dominates total INL. |
| Dynamic Impedance | 0.3–0.8Ω at 1mA/120Hz - maintains <1mV output shift during 1mA load steps, essential for stable feedback in precision current sources. |
| Long-Term Stability | 120ppm after 1000 hours - predicts <0.012% output drift over 1 year, supporting 10-year reliability requirements in medical and test equipment. |
Pinout & Package
LM4050BIX3-2.1-T uses the 3-pin SC70 package (1.8mm × 1.8mm), 50% smaller than SOT23. Pin 3 is NC and must be left floating or tied to pin 2 per datasheet requirement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Anode / Positive Terminal | Connects to system ground or low-impedance return path; forms cathode-to-anode reverse bias junction for regulation. |
| 2 (−) | Cathode / Negative Terminal | Primary output node; voltage referenced to pin 1; sinks shunt current to maintain 2.048V across external load. |
| 3 (N.C.) | No Connection | Must remain unconnected or shorted to pin 2; floating NC pin prevents parasitic coupling and ensures specified tempco performance. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70 package | 1.8mm × 1.8mm footprint - reduces PCB area by 50% vs. SOT23, enabling high-density portable designs like handheld meters and wearables. |
| No output capacitor required | Stable with any capacitive load - eliminates BOM cost and layout risk of external COUT, simplifying design for fast-turn prototyping. |
| Tolerates capacitive loads | Immune to instability from 0–∞ output capacitance - supports direct connection to ADC reference inputs with decoupling caps without oscillation. |
| Micropower operation | 60µA minimum operating current - enables battery life extension in coin-cell-powered devices such as remote sensors and asset trackers. |
| Wide temperature range | –40°C to +125°C guaranteed operation - qualified for under-hood automotive, industrial PLC, and downhole oil/gas electronics. |
Applications
| Portable Instrumentation | Industrial Data Acquisition |
|---|---|
Use Scenario: Handheld multimeters and portable oscilloscopes requiring stable, low-drift reference for 16-bit ADCs. IC Role / Device Role / Timing Role: Shunt voltage reference providing 2.048V excitation and conversion reference for successive-approximation ADCs. Use Value: 0.2% initial accuracy and 50ppm/°C tempco ensure ≤0.3% total error across –10°C to +50°C ambient, meeting Class I meter specs. |
Use Scenario: Modular PLC analog input modules measuring 4–20mA sensor signals with 12–16-bit resolution. IC Role / Device Role / Timing Role: Precision shunt reference for programmable gain instrumentation amplifiers and sigma-delta ADC bias networks. Use Value: 28µVRMS noise and 0.8Ω dynamic impedance prevent reference-induced quantization noise and step-response droop during channel scanning. |
| Battery-Powered Sensors | Medical Diagnostic Equipment |
Use Scenario: Wireless environmental sensors (temperature/humidity/CO₂) powered by CR2032 batteries with 10-year shelf life. IC Role / Device Role / Timing Role: Low-current shunt reference supplying stable 2.048V to microcontroller ADC and analog front-end circuitry. Use Value: 60µA minimum operating current extends battery runtime by >2× vs. references requiring ≥200µA quiescent current. |
Use Scenario: Portable ECG and pulse oximeter devices requiring FDA-grade signal integrity and long-term calibration stability. IC Role / Device Role / Timing Role: Primary voltage reference for analog signal conditioning and ADC reference in battery-operated patient monitors. Use Value: 120ppm long-term stability over 1000h supports 2-year recalibration intervals without field drift compensation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLVH431ACDBVR | Adjustable 1.24V–18V output; 0.5% initial accuracy; 100ppm/°C tempco; SOT23-3 package. | Requires two external resistors for 2.048V setting; higher tempco increases drift in wide-temperature medical use. | Select when adjustable output or higher voltage capability is needed; avoid where 2.048V precision and low tempco are mandatory. |
| REF3020AIDBZR | 2.048V series reference; 0.2% initial accuracy; 50ppm/°C tempco; SC70-3; 50µA supply current. | Series topology requires minimum load current; not suitable for shunt-based current-sink topologies or zero-load conditions. | Choose for low-quiescent-series applications with ground-referenced loads; LM4050BIX3-2.1-T remains preferred for true shunt flexibility and no-minimum-load operation. |
Compared with TLVH431ACDBVR and REF3020AIDBZR, LM4050BIX3-2.1-T uniquely combines fixed 2.048V output, true shunt operation with zero-load capability, and guaranteed 0.2%/50ppm performance in SC70 - making it optimal for space-constrained, battery-sensitive, and high-stability analog systems.
Availability
LM4050BIX3-2.1-T is available at Aetrix Electronics and suitable for portable instrumentation, industrial data acquisition, and battery-powered sensors requiring stable component supply with guaranteed long-term availability.
Supply support for LM4050BIX3-2.1-T 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
Maxim Integrated (now part of Analog Devices) designs precision analog and mixed-signal ICs for demanding industrial, medical, and communications applications.
The LM4050/LM4051 family was engineered specifically for space-critical, micropower shunt reference needs - delivering laser-trimmed accuracy, ultra-small SC70 packaging, and robust operation across extended temperature ranges.
FAQ
What is the exact output voltage tolerance of LM4050BIX3-2.1-T at +25°C?
The LM4050BIX3-2.1-T has a guaranteed ±4.0mV (±0.2%) initial tolerance at +25°C, corresponding to a 2.044V–2.052V range. This is specified for the 'B' grade in the LM4050B electrical characteristics table and applies directly to the LM4050BIX3-2.1-T variant with SC70 packaging and 2.048V nominal output.
Does LM4050BIX3-2.1-T require an external capacitor for stability?
No, LM4050BIX3-2.1-T does not require an external output capacitor and is stable with any capacitive load - including 0pF up to large bulk capacitance. This is confirmed in the Features section and Applications Information, eliminating layout constraints and BOM additions for most reference applications.
What is the minimum operating current for LM4050BIX3-2.1-T?
The LM4050BIX3-2.1-T requires a minimum shunt current of 60µA to maintain regulation, as specified in the Electrical Characteristics table for the 2.048V version. Operation below this current may result in loss of voltage accuracy and increased tempco sensitivity.
Can pin 3 of LM4050BIX3-2.1-T be left unconnected?
Yes - pin 3 of LM4050BIX3-2.1-T is designated N.C. (no connection) and must either be left floating or connected to pin 2 (cathode). The datasheet explicitly states "PIN 3 MUST BE LEFT FLOATING OR CONNECTED TO PIN 2" to ensure specified performance and avoid parametric deviation.
What is the maximum junction temperature rating for LM4050BIX3-2.1-T?
The LM4050BIX3-2.1-T has a maximum junction temperature of +150°C, with an absolute maximum operating temperature of +125°C. Its SC70 package has a thermal derating of 2.17mW/°C above +70°C, limiting continuous power dissipation to 174mW at +70°C ambient.
LM4050BIX3-2.1-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- SC-70, SOT-323
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.048V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 28µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 65 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
LM4050BIX3-2.1-T FAQ
1.How can I place an order for LM4050BIX3-2.1-T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050BIX3-2.1-T 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 LM4050BIX3-2.1-T reliable?
The price and inventory of LM4050BIX3-2.1-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050BIX3-2.1-T is usually 5 days.
3.What payment methods are accepted for LM4050BIX3-2.1-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050BIX3-2.1-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050BIX3-2.1-T?
LM4050BIX3-2.1-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050BIX3-2.1-T 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 LM4050BIX3-2.1-T?
For technical support, including LM4050BIX3-2.1-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050BIX3-2.1-T requirements.
6.How does Aetrix verify that LM4050BIX3-2.1-T is sourced from the original manufacturer or authorized distributors?
All LM4050BIX3-2.1-T 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 LM4050BIX3-2.1-T meets industry standards.
7.What is the process for return or replacement of LM4050BIX3-2.1-T?
All LM4050BIX3-2.1-T units undergo pre-shipment inspection (PSI). If there is an issue with LM4050BIX3-2.1-T, 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 LM4050BIX3-2.1-T part is unused and in its original packaging.
Return procedure for LM4050BIX3-2.1-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4050BIX3-2.1-T 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…
