My Inquiry
My Account
Texas Instruments LM4040CIM3-2.0
- Part No.:
- LM4040CIM3-2.0
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040CIM3-2.0.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,405
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM4040CIM3-2.0 from Texas Instruments is a precision micropower shunt voltage reference with 2.048 V nominal reverse breakdown voltage, ±10 mV (±0.49%) initial tolerance at 25°C, 60 μA minimum operating current, and 100 ppm/°C max temperature coefficient - used for ADC/DAC biasing and sensor excitation in portable instrumentation.
For engineers reviewing the LM4040CIM3-2.0 datasheet, LM4040CIM3-2.0 pinout, LM4040CIM3-2.0 application, or LM4040CIM3-2.0 equivalent, this page delivers verified electrical specs, SOT-23 package mapping, thermal hysteresis (0.08%), noise performance (35 μVrms), and real-world substitution guidance for industrial and automotive-grade designs.
Technical Context
The LM4040CIM3-2.0 implements a Zener-based shunt architecture with bandgap temperature drift curvature correction and fuse/Zener-zap trimming at wafer sort to achieve ±0.49% initial accuracy. It operates as a two-terminal device requiring only an external current-limiting resistor.
Its low dynamic impedance (0.3–0.9 Ω) and capacitive-load tolerance enable stable regulation without output capacitance, while wide 60 μA–15 mA operating current range supports both ultra-low-power and higher-current reference applications across −40°C to +85°C industrial temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 2.048 V nominal reverse breakdown voltage - precise value enables 12-bit ADC full-scale calibration without scaling resistors. |
| Initial Tolerance | ±10 mV (±0.49%) at 25°C - ensures ≤1 LSB error in 12-bit systems using 2.048 V reference span. |
| Temp Coefficient | ≤100 ppm/°C over −40°C to +85°C - contributes ≤±6.5 mV drift across full industrial range, critical for field-deployed sensors. |
| Min Operating Current | 60 μA at 25°C - allows operation from high-impedance bias networks in battery-powered IoT nodes. |
| Dynamic Impedance | 0.3–0.9 Ω at 1 mA - maintains <1 mV load regulation shift under 1 mA current step changes. |
| Output Noise | 35 μVrms (10 Hz–10 kHz) - low enough to avoid degrading ENOB in 16-bit SAR ADCs. |
| Thermal Hysteresis | 0.08% - equates to ~1.6 mV hysteresis after −40°C/125°C thermal cycling, essential for repeatable metrology. |
Pinout & Package
SOT-23 (DBZ) 3-pin surface-mount package: 2.92 mm × 1.30 mm body, 1.0 mm height, gull-wing leads; RoHS-compliant, Pb-free, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 2) | Ground reference terminal | Must be connected to system ground; defines 0 V reference for cathode voltage regulation. |
| Cathode (Pin 1) | Shunt current input / regulated output | Accepts external current source; develops stable 2.048 V relative to Anode when current ≥60 μA flows into this pin. |
| NC (Pin 3) | No-connect terminal | Internally unconnected; must be left floating or tied to Anode (Pin 2) per TI recommendation - no functional impact if unused. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables direct integration into space-constrained PCB layouts (e.g., wearables, sensor nodes) without stability-compromising bypass caps. |
| Tolerates capacitive loads | Stable with >100 nF output capacitance - simplifies EMI filtering and decoupling in noisy industrial environments. |
| Micropower operation | 60 μA minimum current enables >10-year battery life in coin-cell-powered data loggers (e.g., CR2032 @ 220 mAh). |
| Fixed 2.048 V output | Matches standard 12-bit ADC full-scale range (212 = 4096 → 2.048 V = 0.5 mV/LSB), eliminating gain calibration. |
| AEC-Q200 Grade 3 qualified | Validated for automotive interior applications (−40°C to +85°C), including infotainment power monitoring and ADAS sensor biasing. |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Handheld multimeter with 16-bit sigma-delta ADC and lithium coin-cell power supply. IC Role / Device Role / Timing Role: Shunt reference providing stable 2.048 V excitation for precision resistor ladder and ADC reference input. Use Value: Enables ±0.005% measurement accuracy over temperature without recalibration; 60 μA quiescent current extends battery life to 7+ years. |
Use Scenario: Industrial PLC analog input module digitizing 4–20 mA sensor signals. IC Role / Device Role / Timing Role: Primary voltage reference for dual-slope integrator and SAR ADC front-end. Use Value: 100 ppm/°C tempco and 0.08% thermal hysteresis ensure repeatability across seasonal ambient shifts in factory environments. |
| Automotive Sensor Biasing | Precision Audio Calibration |
Use Scenario: Cabin air quality sensor node with NDIR CO₂ detector and CAN bus interface. IC Role / Device Role / Timing Role: Reference for thermopile amplifier and ADC measuring differential IR absorption. Use Value: AEC-Q200 Grade 3 qualification guarantees reliability under automotive thermal cycling; 35 μVrms noise prevents signal corruption in low-level IR detection. |
Use Scenario: High-fidelity DAC-based audio test equipment requiring DC offset nulling and gain trimming. IC Role / Device Role / Timing Role: Stable 2.048 V reference for op-amp bias networks and digital potentiometer calibration. Use Value: Low thermal hysteresis (0.08%) eliminates audible "pops" during power-up/power-down sequences in studio gear. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C20IDBZR | 2.048 V, ±0.5% initial tolerance, 75 ppm/°C max tempco, SOT-23 package - tighter tempco but looser initial tolerance than LM4040CIM3-2.0. | Preferred where long-term thermal stability dominates over room-temperature calibration accuracy. | Select TL4050C20IDBZR when system-level calibration occurs at temperature extremes rather than at 25°C. |
| MAX6002AEUR+T | 2.048 V, ±0.2% initial tolerance, 100 ppm/°C max tempco, SOT-23 - higher initial accuracy but lower max operating current (10 mA vs. 15 mA). | Better for ultra-precision 14–16-bit systems needing sub-0.2% baseline accuracy; limited headroom for high-current reference buffers. | Choose MAX6002AEUR+T when absolute initial accuracy is prioritized over drive capability or extended current range. |
Compared with TL4050C20IDBZR and MAX6002AEUR+T, the LM4040CIM3-2.0 offers optimal balance of initial tolerance (±0.49%), temperature coefficient (≤100 ppm/°C), and 15 mA drive capability - making it ideal for cost-sensitive industrial DAQ where moderate accuracy and robust load driving coexist.
Availability
LM4040CIM3-2.0 is available at Aetrix Electronics and suitable for portable instrumentation, industrial data acquisition, and automotive sensor biasing requiring stable component supply with guaranteed long-term continuity.
Supply support for LM4040CIM3-2.0 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 decades of expertise in precision reference design and automotive-qualified components.
The LM4040-N product line delivers micropower shunt references optimized for space-constrained, battery-operated, and safety-critical systems - emphasizing accuracy, thermal stability, and manufacturability across industrial and automotive applications.
FAQ
What is the exact reference voltage and tolerance of the LM4040CIM3-2.0?
The LM4040CIM3-2.0 provides a nominal reverse breakdown voltage of 2.048 V with an initial tolerance of ±10 mV (±0.49%) at 25°C, as specified in TI's SNOS633K datasheet Section 6.6 for Grade C, Industrial Temperature grade. This tolerance remains valid across its −40°C to +85°C operating range with defined thermal drift behavior.
Does the LM4040CIM3-2.0 require an external capacitor for stability?
No, the LM4040CIM3-2.0 does not require an external output capacitor for stability. Its internal design ensures unconditional stability even with capacitive loads up to 100 nF, as confirmed in the TI datasheet Features section and Application Schematic. This eliminates board area and BOM cost associated with reference bypassing.
What is the minimum operating current for the LM4040CIM3-2.0, and why does it matter?
The LM4040CIM3-2.0 requires a minimum operating current of 60 μA at 25°C to maintain regulation within specification. This low threshold enables use in ultra-low-power applications such as battery-powered sensors and energy-harvesting systems where supply current budgets are constrained to single-digit microamps.
How does the LM4040CIM3-2.0 perform under thermal cycling, and what is its thermal hysteresis?
The LM4040CIM3-2.0 exhibits 0.08% thermal hysteresis - measured as the voltage difference at 25°C before and after cycling between −40°C and +125°C. This translates to approximately ±1.6 mV deviation, ensuring repeatable calibration in field-deployed equipment subjected to repeated environmental stress.
Is the LM4040CIM3-2.0 qualified for automotive applications?
Yes, the LM4040CIM3-2.0 is AEC-Q200 Grade 3 qualified per TI's official documentation, supporting operation from −40°C to +85°C in automotive interior environments. It is commonly deployed in cabin sensors, body control modules, and infotainment power monitoring circuits requiring certified reliability.
LM4040CIM3-2.0 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):
- 2.048V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 35µVrms
- 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
LM4040CIM3-2.0 FAQ
1.How can I place an order for LM4040CIM3-2.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040CIM3-2.0 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 LM4040CIM3-2.0 reliable?
The price and inventory of LM4040CIM3-2.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040CIM3-2.0 is usually 5 days.
3.What payment methods are accepted for LM4040CIM3-2.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040CIM3-2.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040CIM3-2.0?
LM4040CIM3-2.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040CIM3-2.0 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 LM4040CIM3-2.0?
For technical support, including LM4040CIM3-2.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040CIM3-2.0 requirements.
6.How does Aetrix verify that LM4040CIM3-2.0 is sourced from the original manufacturer or authorized distributors?
All LM4040CIM3-2.0 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 LM4040CIM3-2.0 meets industry standards.
7.What is the process for return or replacement of LM4040CIM3-2.0?
All LM4040CIM3-2.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040CIM3-2.0, 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 LM4040CIM3-2.0 part is unused and in its original packaging.
Return procedure for LM4040CIM3-2.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040CIM3-2.0 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…
