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Texas Instruments LM4050BIM3-4.1
- Part No.:
- LM4050BIM3-4.1
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050BIM3-4.1.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,977
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Product details
Overview
LM4050BIM3-4.1 from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a nominal 4.096 V reverse breakdown voltage with ±8.2 mV (±0.2%) initial tolerance at 25°C, 73 μA minimum operating current, and 50 ppm/°C max temperature coefficient - used for ADC/DAC biasing and sensor excitation in portable instrumentation.
For engineers reviewing the LM4050BIM3-4.1 datasheet, LM4050BIM3-4.1 pinout, LM4050BIM3-4.1 application, or LM4050BIM3-4.1 equivalent, key selection criteria include output voltage accuracy over −40°C to +85°C, low dynamic impedance (0.5 Ω), no-output-capacitor operation, thermal hysteresis (1.148 mV), and compatibility with capacitive loads in space-constrained designs.
Technical Context
The LM4050BIM3-4.1 operates as a two-terminal shunt reference, sinking current through its cathode while maintaining a stable 4.096 V across anode-to-cathode terminals. It uses bandgap-derived curvature-corrected Zener-zap trimming for ±0.2% initial accuracy and achieves 50 ppm/°C max tempco via on-die temperature drift compensation.
Its design eliminates external stabilization capacitors and tolerates unlimited capacitive loading due to inherent phase-margin optimization. The device sustains stable regulation from 73 μA to 15 mA operating current across industrial temperature range (−40°C to +85°C) with 93 μVrms wideband noise (10 Hz–10 kHz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096 V nominal reverse breakdown voltage - sets precise bias point for 12-bit ADCs and ratiometric sensor bridges. |
| Initial Tolerance | ±8.2 mV (±0.2%) at 25°C - enables single-point calibration in production test without trimming. |
| Tempco | ≤50 ppm/°C over −40°C to +85°C - ensures <±0.33 mV drift across full industrial range, critical for high-resolution measurement systems. |
| Min Operating Current | 73 μA - supports ultra-low-power battery operation in wake-on-event sensor nodes. |
| Dynamic Impedance | 0.5 Ω at 1 mA - minimizes load-induced voltage shift during fast digital switching transients. |
| Wideband Noise | 93 μVrms (10 Hz–10 kHz) - limits quantization error in 16-bit+ data acquisition front-ends. |
| Thermal Hysteresis | 1.148 mV after −40°C/125°C cycling - maintains repeatability in thermally cycled field deployments. |
Pinout & Package
SOT-23 (DBZ) package: 3-pin surface-mount, 2.92 mm × 1.30 mm body size, JEDEC MO-178AA compliant. Cathode and anode are functional; pin 3 is NC (no internal connection).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / voltage sense node | Connects to regulated rail; sinks all excess current to maintain 4.096 V across load and series resistor. |
| Anode (Pin 2) | Reference ground return | Must be connected to system ground; forms the 4.096 V potential reference for downstream circuitry. |
| NC (Pin 3) | No internal connection | Left floating per datasheet; no PCB trace or pad required - reduces layout complexity and leakage paths. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables direct integration into compact PCB layouts without stability-compensation components or board area penalty. |
| Tolerates capacitive loads | Supports direct connection to ADC input caps, op-amp feedback networks, and decoupling banks without oscillation risk. |
| Fixed 4.096 V output | Matches common 12-bit full-scale reference (212 = 4096), eliminating scaling resistors in microcontroller ADC applications. |
| Industrial temperature range | Validated operation from −40°C to +85°C - suitable for factory automation, energy metering, and outdoor IoT edge nodes. |
| Low quiescent current | 73 μA min operating current enables >10-year battery life in coin-cell-powered portable instruments. |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Handheld multimeter with 16-bit SAR ADC and lithium coin-cell power supply. IC Role / Device Role / Timing Role: Shunt reference providing stable 4.096 V excitation for precision resistive divider and ADC reference input. Use Value: Enables ±0.01% measurement accuracy over battery discharge (2.0–3.3 V) and −10°C to +50°C ambient without recalibration. |
Use Scenario: Industrial PLC analog input module acquiring 8-channel 4–20 mA sensor signals. IC Role / Device Role / Timing Role: Primary voltage reference for 24-bit delta-sigma ADC and isolated current-loop receiver circuitry. Use Value: Delivers <±1 LSB INL error across −40°C to +75°C with <1.2 mV load-regulation shift at full channel scan rate. |
| Process Control Sensors | Precision Audio Biasing |
Use Scenario: RTD temperature transmitter mounted in refinery piping with ambient swings from −30°C to +85°C. IC Role / Device Role / Timing Role: Excitation source for 4-wire platinum RTD bridge and reference for ratiometric ADC conversion. Use Value: Maintains <±0.1°C total system error budget despite 115°C thermal cycling due to 1.148 mV hysteresis and 50 ppm/°C tempco. |
Use Scenario: High-fidelity audio DAC board requiring ultra-low-noise analog supply for I/V conversion stage. IC Role / Device Role / Timing Role: Low-noise 4.096 V reference for op-amp bias network and DAC output buffer offset nulling. Use Value: Contributes only 93 μVrms noise floor - below audible threshold and compatible with 110 dB SNR audio signal chains. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040BIM3-4.1 | Higher 100 μA min operating current; 75 ppm/°C max tempco; 120 μVrms noise | Less suitable for sub-100 μA battery systems; higher drift limits use in <0.05% accuracy loops | Select LM4040BIM3-4.1 only if legacy qualification or cost sensitivity outweighs LM4050BIM3-4.1's lower IQ and tighter tempco. |
| ADR3440ARJZ-R7 | 4.096 V output, ±0.1% initial accuracy, 30 ppm/°C max tempco, but requires 100 μA min current and 1 μF output cap | Not capacitor-free; unsuitable for high-C load or zero-cap footprint designs | Choose ADR3440ARJZ-R7 when absolute best tempco is mandatory and board space allows output capacitor. |
Compared with LM4040BIM3-4.1 and ADR3440ARJZ-R7, the LM4050BIM3-4.1 uniquely combines capacitor-free operation, 73 μA min current, and 50 ppm/°C tempco - making it optimal for space- and power-constrained precision analog systems where layout simplicity and long battery life are primary constraints.
Availability
LM4050BIM3-4.1 is available at Aetrix Electronics and suitable for portable instrumentation, industrial data acquisition, and process control sensors requiring stable component supply with guaranteed long-term continuity.
Supply support for LM4050BIM3-4.1 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 specializing in analog and embedded processing technologies, with leadership in precision analog ICs since 1951.
The LM4050-N product line delivers micropower shunt references optimized for space-constrained, battery-operated, and high-accuracy measurement systems - designed specifically for ADC/DAC biasing, sensor excitation, and calibration-critical signal chains.
FAQ
What is the output voltage tolerance of the LM4050BIM3-4.1 at 25°C?
The LM4050BIM3-4.1 has a ±0.2% initial output voltage tolerance at 25°C, corresponding to ±8.2 mV around its nominal 4.096 V reverse breakdown voltage. This grade B specification is production-tested and guaranteed per TI's SNOS455G datasheet Section 6.7.
Does the LM4050BIM3-4.1 require an external output capacitor?
No, the LM4050BIM3-4.1 does not require an external output capacitor. Its internal design ensures stability with any capacitive load, including direct connection to ADC input capacitors or op-amp feedback networks - a key advantage over many competing shunt references.
What is the minimum operating current for the LM4050BIM3-4.1 over temperature?
The LM4050BIM3-4.1 requires a minimum operating current of 73 μA across the industrial temperature range (−40°C to +85°C), as specified in Section 6.7 of the SNOS455G datasheet. At 25°C, the typical minimum is 73 μA, rising to 78 μA in the extended −40°C to +125°C range.
Can the LM4050BIM3-4.1 be used in automotive applications?
The LM4050BIM3-4.1 is rated for industrial temperature range (−40°C to +85°C) and is not AEC-Q100 qualified. For automotive use, TI offers the pin-compatible LM4050BIM3-4.1-Q1 variant (Q1 suffix), which meets AEC-Q100 Grade 1 requirements and is manufactured on an automotive-grade flow.
What is the thermal hysteresis performance of the LM4050BIM3-4.1?
The LM4050BIM3-4.1 exhibits 1.148 mV thermal hysteresis after cycling between −40°C and +125°C, as measured per datasheet Section 6.7. This value reflects voltage deviation at 25°C before and after extreme temperature exposure - critical for repeatable calibration in field-deployed equipment.
LM4050BIM3-4.1 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:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 4.096V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 93µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 73 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050BIM3-4.1 FAQ
1.How can I place an order for LM4050BIM3-4.1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050BIM3-4.1 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 LM4050BIM3-4.1 reliable?
The price and inventory of LM4050BIM3-4.1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050BIM3-4.1 is usually 5 days.
3.What payment methods are accepted for LM4050BIM3-4.1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050BIM3-4.1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050BIM3-4.1?
LM4050BIM3-4.1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050BIM3-4.1 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 LM4050BIM3-4.1?
For technical support, including LM4050BIM3-4.1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050BIM3-4.1 requirements.
6.How does Aetrix verify that LM4050BIM3-4.1 is sourced from the original manufacturer or authorized distributors?
All LM4050BIM3-4.1 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 LM4050BIM3-4.1 meets industry standards.
7.What is the process for return or replacement of LM4050BIM3-4.1?
All LM4050BIM3-4.1 units undergo pre-shipment inspection (PSI). If there is an issue with LM4050BIM3-4.1, 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 LM4050BIM3-4.1 part is unused and in its original packaging.
Return procedure for LM4050BIM3-4.1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4050BIM3-4.1 Tags
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TL431AIDBZR
Texas Instruments
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TL431BQDBZR
Texas Instruments
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AN431AN-ATRG1
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LM4040CYM3-2.5-TR
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LM4040CYM3-4.1-TR
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LM4040EIM3-2.5/NOPB
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AZ431LBNTR-G1
Diodes Incorporated
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LM4040D20IDBZR
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LM4041DIM3-ADJ/NOPB
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LM4040DIM3X-2.5/NOPB
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LM4040DIM3-2.5/NOPB
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AZ431LANTR-G1
Diodes Incorporated
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