My Inquiry
My Account
Texas Instruments LM4040C50ILP
,TO-226_straightlead.jpg)
- Part No.:
- LM4040C50ILP
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
LM4040C50ILP.pdf
- Description:
- IC VREF SHUNT 0.5% TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,438
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM4040C50ILP from Texas Instruments is a precision micropower shunt voltage reference delivering a fixed 5.0V output with ±0.5% initial accuracy (C grade), 100ppm/°C temperature coefficient, 35μVRMS wideband noise, and stable operation from 45μA to 15mA cathode current - used in high-accuracy analog input modules and field transmitters requiring low-drift, low-noise biasing.
For engineers reviewing the LM4040C50ILP datasheet, LM4040C50ILP pinout, LM4040C50ILP application, or LM4040C50ILP equivalent, this page provides verified specifications, package mapping to SOT-23-3 (DBZ), thermal hysteresis (0.08%), dynamic impedance (0.9Ω), and direct alternative part comparisons for industrial-temperature (–40°C to 85°C) designs.
Technical Context
The LM4040C50ILP operates as a two-terminal shunt reference, sinking cathode current (IZ) to maintain a precise 5.0V reverse breakdown voltage across its terminals. Its Zener-zap trimmed silicon design achieves tight initial tolerance without external components, and it remains stable with any capacitive load - eliminating need for output capacitance.
It features low dynamic impedance (0.9Ω at 1mA), low thermal hysteresis (0.08%), and long-term stability of 120ppm over 1000 hours. The device is characterized across –40°C to +85°C ambient, with guaranteed performance at minimum 45μA cathode current and maximum 15mA operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0V nominal, ±0.5% initial accuracy at 25°C - ensures ≤±25mV absolute error in calibration-critical signal chains |
| Temperature Coefficient | 100ppm/°C max - contributes ≤±5.2mV drift over –40°C to +85°C operating range |
| Wideband Noise | 35μVRMS (10Hz–10kHz) - minimizes noise contribution in high-resolution ADC reference paths |
| Cathode Current Range | 45μA to 15mA - supports ultra-low-power sensor interfaces and robust industrial supply regulation |
| Dynamic Impedance | 0.9Ω typical at 1mA - maintains output stability under fast load transients in precision DAC buffers |
| Thermal Hysteresis | 0.08% - limits voltage shift after thermal cycling, critical for repeatable metrology-grade measurements |
| Long-Term Stability | 120ppm over 1000 hours - reduces recalibration frequency in sealed industrial instrumentation |
Pinout & Package
LM4040C50ILP is packaged in a 3-pin SOT-23 (DBZ) case measuring 2.92mm × 1.30mm, with cathode (pin 1), anode (pin 2), and no-connect (pin 3) terminals. Pin 3 must float or be tied to the anode in high-EMI environments per TI design guidance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current/voltage input | Sinks regulated current to establish 5.0V reference; connects to supply rail via series resistor |
| Anode (Pin 2) | Common ground reference | Typically connected to system ground; defines reference potential for all downstream circuitry |
| No-Connect (Pin 3) | Unused internal node | Must remain unconnected or tied to anode; not electrically active but improves EMI immunity when bonded |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 5.0V output | Eliminates external resistor divider errors and simplifies layout in space-constrained analog front-ends |
| No output capacitor required | Enables stable operation with any capacitive load - ideal for driving ADC sample-and-hold inputs directly |
| 45μA minimum operating current | Supports battery-powered sensors and energy-harvesting systems where quiescent current is critical |
| Stable over –40°C to +85°C | Guarantees performance in industrial control cabinets, outdoor field transmitters, and automotive under-hood modules |
| Low 35μVRMS noise | Preserves effective resolution in 16-bit+ data acquisition systems without additional filtering |
Applications
| Analog Input Module | Field Transmitter |
|---|---|
Use Scenario: Precision 4–20mA loop-powered transmitter conditioning analog sensor signals before digitization. IC Role / Device Role / Timing Role: Provides stable 5.0V reference for ADC, DAC, and op-amp biasing in isolated signal chains. Use Value: Enables <±0.1% total unadjusted error (TUE) over temperature using C-grade accuracy and 100ppm/°C drift control. |
Use Scenario: Remote pressure/temperature transmitter operating in harsh industrial environments with wide ambient swings. IC Role / Device Role / Timing Role: Serves as primary voltage reference for sensor excitation and signal scaling circuitry. Use Value: Delivers consistent 5.0V output despite thermal cycling due to 0.08% hysteresis and 120ppm long-term stability. |
| Data-Acquisition System | Energy Infrastructure |
Use Scenario: Modular DAQ unit sampling multiple channels at 100kSPS with 16-bit SAR ADCs. IC Role / Device Role / Timing Role: Supplies low-noise, low-drift reference to ADC reference input and programmable gain amplifier stages. Use Value: 35μVRMS noise and 0.9Ω dynamic impedance prevent SNR degradation and maintain ENOB >15.2 bits. |
Use Scenario: Smart electricity meter with anti-tampering features and metrology-grade accuracy certification. IC Role / Device Role / Timing Role: References voltage scaling for current-sense amplifiers and energy calculation ICs. Use Value: ±0.5% initial tolerance and 100ppm/°C TC meet IEC 62053-21 Class 0.2 accuracy requirements across temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040C50IDBZR | Same electrical specs, tape-and-reel packaging (3000-unit reel), identical DBZ (SOT-23-3) footprint | No functional difference; optimized for automated SMT assembly vs. cut-tape handling | Select LM4040C50IDBZR for high-volume production; LM4040C50ILP is same-spec cut-tape variant |
| REF3050AIDBZR | 5.0V series reference with 50ppm/°C TC, 25μVRMS noise, 50μA IQ - requires output capacitor, higher quiescent current | Better noise/TC but needs external cap and consumes more supply current; unsuitable for ultra-low-power shunt topologies | Choose REF3050AIDBZR only if series architecture fits system topology and board area allows capacitor placement |
Compared with LM4040C50IDBZR, LM4040C50ILP offers identical performance in cut-tape form for prototyping and low-volume builds; versus REF3050AIDBZR, it enables simpler, capacitor-free shunt designs with lower minimum operating current (45μA vs. 50μA) but trades off slightly higher TC and noise.
Availability
LM4040C50ILP is available at Aetrix Electronics and suitable for analog input modules, field transmitters, and data-acquisition systems requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LM4040C50ILP 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 high-reliability manufacturing.
The LM4040 series was developed for cost-sensitive, space-constrained industrial and instrumentation applications demanding micropower operation, high accuracy, and robust thermal performance without external components.
FAQ
What is the operating temperature range for LM4040C50ILP?
The LM4040C50ILP is characterized for industrial temperature operation from –40°C to +85°C. All electrical specifications - including 5.0V output, ±0.5% initial accuracy, and 100ppm/°C temperature coefficient - are guaranteed across this full range per TI's SLOS456Q datasheet Section 6.17.
Does LM4040C50ILP require an output capacitor?
No, LM4040C50ILP is stable with all capacitive loads and does not require an output capacitor. This is confirmed in the device description and "Features" section of the datasheet, enabling direct connection to ADC reference inputs or op-amp feedback networks without added components.
What is the minimum cathode current needed for LM4040C50ILP to regulate properly?
The LM4040C50ILP requires a minimum cathode current of 45μA (typical) to maintain regulation. At 25°C, the specified IZ,min is 45μA; over the full –40°C to +85°C range, it increases to 80μA - values documented in Table 6.17 of the LM4040C50I electrical characteristics.
How does the pin configuration of LM4040C50ILP differ from LM4040C50IDBZR?
LM4040C50ILP and LM4040C50IDBZR share identical pinout: Pin 1 = Cathode, Pin 2 = Anode, Pin 3 = No-Connect. Both use the DBZ (SOT-23-3) package. The only difference is packaging format - LM4040C50ILP is supplied in cut tape, while LM4040C50IDBZR is on 3000-unit tape-and-reel.
Can LM4040C50ILP be used in automotive applications?
LM4040C50ILP is rated for –40°C to +85°C and is not qualified to AEC-Q200. For automotive under-hood use requiring extended temperature (–40°C to +125°C), TI offers the LM4040C50Q variant (e.g., LM4040C50QDBZR); LM4040C50ILP is intended for industrial, instrumentation, and commercial applications only.
LM4040C50ILP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA)
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 80µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 95 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
LM4040C50ILP FAQ
1.How can I place an order for LM4040C50ILP through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040C50ILP 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 LM4040C50ILP reliable?
The price and inventory of LM4040C50ILP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040C50ILP is usually 5 days.
3.What payment methods are accepted for LM4040C50ILP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040C50ILP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040C50ILP?
LM4040C50ILP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040C50ILP 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 LM4040C50ILP?
For technical support, including LM4040C50ILP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040C50ILP requirements.
6.How does Aetrix verify that LM4040C50ILP is sourced from the original manufacturer or authorized distributors?
All LM4040C50ILP 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 LM4040C50ILP meets industry standards.
7.What is the process for return or replacement of LM4040C50ILP?
All LM4040C50ILP units undergo pre-shipment inspection (PSI). If there is an issue with LM4040C50ILP, 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 LM4040C50ILP part is unused and in its original packaging.
Return procedure for LM4040C50ILP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040C50ILP 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…
