My Inquiry
My Account
Texas Instruments LM4041CIM3-1.2
- Part No.:
- LM4041CIM3-1.2
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041CIM3-1.2.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,055
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM4041CIM3-1.2 from Texas Instruments is a precision shunt voltage reference in SOT-23 package, delivering a stable 1.225 V reverse breakdown voltage with ±0.5% initial tolerance (25°C), 100 ppm/°C max temperature coefficient, and 20 μVRMS wideband noise (10 Hz–10 kHz). It operates from 60 μA to 12 mA and supports automotive-grade extended temperature range (−40°C to +125°C).
For engineers reviewing the LM4041CIM3-1.2 datasheet, LM4041CIM3-1.2 pinout, LM4041CIM3-1.2 application, or LM4041CIM3-1.2 equivalent, key selection criteria include output stability under capacitive loads, no external capacitor requirement, low quiescent current, grade-specific thermal drift behavior, and compatibility with battery-powered and high-reliability industrial sensing circuits.
Technical Context
The LM4041CIM3-1.2 uses a bandgap-based Zener-zap trimmed shunt architecture with curvature-corrected temperature drift compensation. Its dynamic impedance remains below 1.5 Ω at 1 mA, enabling stable regulation across load and temperature variations without external stabilization components.
It functions as a two-terminal shunt device: cathode supplies regulated voltage while anode connects to system ground. The SOT-23 package supports surface-mount integration in space-constrained designs, and its reverse-breakdown topology allows direct use in feedback loops of op-amp-based regulators or ADC reference buffers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225 V nominal reverse breakdown voltage - sets precise reference point for analog signal conditioning and data acquisition systems |
| Initial Tolerance | ±0.5% at 25°C (±6 mV) - enables high-accuracy calibration without post-manufacture trimming |
| Temp Coefficient | ≤100 ppm/°C over −40°C to +125°C - ensures ≤±1.23 mV total drift across full operating range |
| Operating Current | 60 μA to 12 mA - supports ultra-low-power sensor nodes and high-current reference buffering |
| Noise (10Hz–10kHz) | 20 μVRMS - minimizes quantization error in 16-bit+ ADC applications |
| Dynamic Impedance | ≤1.5 Ω at 1 mA - maintains voltage stability despite rapid load transients |
| Long-Term Stability | 120 ppm after 1000 hrs - guarantees consistent performance in metering and instrumentation deployments |
Pinout & Package
SOT-23 (DBZ) package: 3-pin surface-mount, 1.30 mm × 2.92 mm body size, JEDEC standard footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | I/O | Shunt current input and regulated output node - connects to supply rail via series resistor; voltage appears between Cathode and Anode |
| Anode (Pin 2) | O | Ground reference terminal - must be connected to system ground; defines 0 V reference for output voltage |
| NC (Pin 3) | - | No-connect terminal - must float or tie to Anode per EMI mitigation guidance; not internally bonded in LM4041CIM3-1.2 |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Enables single-component reference design with guaranteed stability into any capacitive load, reducing BOM count and PCB area |
| Tolerates capacitive loads | Eliminates need for isolation resistors or ferrite beads when driving ADC input caps or op-amp inputs |
| Automotive-qualified (AEC-Q100 Grade 1) | Validated for −40°C to +125°C ambient operation - suitable for engine control, ADAS sensors, and infotainment power rails |
| Low 60 μA minimum operating current | Supports energy harvesting and coin-cell-powered devices where supply current is constrained below 100 μA |
| Reverse breakdown voltage option | Fixed 1.225 V output eliminates external resistor network needed in adjustable references, improving accuracy and thermal matching |
Applications
| Battery-Powered Equipment | Data-Acquisition Systems |
|---|---|
Use Scenario: Precision voltage reference for portable gas analyzers powered by Li-ion cells with varying state-of-charge. IC Role / Device Role / Timing Role: Shunt reference providing stable 1.225 V for 16-bit SAR ADC biasing and sensor excitation circuitry. Use Value: Maintains <±0.5 LSB error across battery discharge cycle and temperature swing due to low tempco and load regulation. | Use Scenario: Reference source in modular industrial DAQ modules measuring thermocouple, RTD, and strain gauge signals. IC Role / Device Role / Timing Role: Primary voltage reference for multi-channel simultaneous-sampling ADC front-end with shared reference bus. Use Value: 20 μVRMS noise and <1.5 Ω dynamic impedance prevent cross-channel crosstalk and preserve ENOB in high-resolution measurements. |
| Process Control | Automotive Electronics |
Use Scenario: Calibration reference in loop-powered 4–20 mA transmitter for pressure transducers in chemical plants. IC Role / Device Role / Timing Role: Two-terminal shunt reference establishing precise 1.225 V threshold for current-loop DAC output scaling. Use Value: Stable operation from 60 μA enables compliance with low-power HART communication requirements while maintaining ±0.5% accuracy. | Use Scenario: Reference for battery monitoring ICs in 12 V vehicle electrical systems with wide ambient temperature swings. IC Role / Device Role / Timing Role: AEC-Q100 Grade 1 shunt reference supplying accurate voltage to fuel injector driver ADCs and OBD-II diagnostic circuits. Use Value: Validated −40°C to +125°C performance ensures reliable readings during cold cranking and under-hood thermal stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431CDBZR | 2.495 V nominal output, higher minimum current (1 mA), ±2% initial tolerance, no Grade 1 automotive qualification | Requires external resistor divider for 1.225 V; unsuitable for ultra-low-power or automotive-qualified designs | Select only if 2.5 V reference suffices and cost is primary constraint; verify thermal drift exceeds 100 ppm/°C |
| MAX6008AEUR+T | 1.25 V output, ±0.2% initial tolerance, 75 ppm/°C tempco, SC70-3 package, non-automotive qualified | Higher accuracy but narrower temperature range (−40°C to +85°C); lacks AEC-Q100 validation | Prefer for commercial-grade portable instruments needing tighter initial tolerance; avoid in automotive or extended-temp industrial use |
Compared with TL431CDBZR and MAX6008AEUR+T, the LM4041CIM3-1.2 uniquely combines fixed 1.225 V output, AEC-Q100 Grade 1 qualification, sub-100 ppm/°C drift, and micro-power operation - making it the only choice for automotive and high-stability battery-powered systems requiring minimal external components.
Availability
LM4041CIM3-1.2 is available at Aetrix Electronics and suitable for battery-powered equipment, data-acquisition systems, and automotive electronics requiring stable component supply with long-term availability assurance.
Supply support for LM4041CIM3-1.2 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 and automotive-qualified components.
The LM4041-N product line delivers micro-power shunt voltage references optimized for space-constrained, high-accuracy applications including portable instrumentation, industrial process control, and automotive subsystems.
FAQ
What is the output voltage tolerance of LM4041CIM3-1.2 over temperature?
The LM4041CIM3-1.2 has an initial reverse breakdown voltage tolerance of ±0.5% at 25°C (±6 mV). Over the extended temperature range (−40°C to +125°C), its total tolerance is ±1.5%, calculated as ±0.5% ± (100 ppm/°C × 100°C × 1.225 V) = ±18.4 mV. This value is confirmed in Section 5.7 of the TI datasheet for LM4041CEM3/LM4041QCEM3 variants.
Does LM4041CIM3-1.2 require an external capacitor for stability?
No, the LM4041CIM3-1.2 does not require an external capacitor for stability. Its internal design provides inherent stability into any capacitive load, eliminating the need for output bypass capacitors or isolation resistors - a key advantage over older shunt references like TL431. This feature is explicitly stated in the Features section and validated across all operating conditions in the datasheet.
What is the minimum operating current for LM4041CIM3-1.2?
The LM4041CIM3-1.2 has a minimum operating current of 60 μA at 25°C, and 68 μA across the full −40°C to +125°C range. This ultra-low current enables use in energy-harvesting systems and battery-backed applications where supply current must remain below 100 μA. The value is specified in Section 5.7 (Extended Temperature Range) of the official TI datasheet.
Is LM4041CIM3-1.2 qualified for automotive applications?
Yes, LM4041CIM3-1.2 is AEC-Q100 qualified as Grade 1 (−40°C to +125°C ambient), with test results documented in the Features section of the TI datasheet. It is part of the LM4041-N-Q1 family, explicitly designated for automotive electronics, and shares qualification status with LM4041QCIM3 - the Q1 suffix denotes automotive qualification.
What package type does LM4041CIM3-1.2 use?
The LM4041CIM3-1.2 uses the SOT-23 (DBZ) package: a 3-pin surface-mount outline measuring 1.30 mm × 2.92 mm. Pin 1 is Cathode, Pin 2 is Anode, and Pin 3 is NC (no-connect), which must either float or connect to Anode per TI's EMI mitigation guidance. This package information is confirmed in the Device Information table and Pin Configuration section of the datasheet.
LM4041CIM3-1.2 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):
- 1.225V
- Voltage - Output (Max):
- -
- Current - Output:
- 12 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 20µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 65 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4041CIM3-1.2 FAQ
1.How can I place an order for LM4041CIM3-1.2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041CIM3-1.2 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 LM4041CIM3-1.2 reliable?
The price and inventory of LM4041CIM3-1.2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041CIM3-1.2 is usually 5 days.
3.What payment methods are accepted for LM4041CIM3-1.2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041CIM3-1.2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041CIM3-1.2?
LM4041CIM3-1.2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041CIM3-1.2 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 LM4041CIM3-1.2?
For technical support, including LM4041CIM3-1.2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041CIM3-1.2 requirements.
6.How does Aetrix verify that LM4041CIM3-1.2 is sourced from the original manufacturer or authorized distributors?
All LM4041CIM3-1.2 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 LM4041CIM3-1.2 meets industry standards.
7.What is the process for return or replacement of LM4041CIM3-1.2?
All LM4041CIM3-1.2 units undergo pre-shipment inspection (PSI). If there is an issue with LM4041CIM3-1.2, 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 LM4041CIM3-1.2 part is unused and in its original packaging.
Return procedure for LM4041CIM3-1.2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4041CIM3-1.2 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…
