My Inquiry
My Account
Texas Instruments LM4040CIM7-2.5/NOPB
- Part No.:
- LM4040CIM7-2.5/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LM4040CIM7-2.5/NOPB.pdf
- Description:
- IC VREF SHUNT 0.5% SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:5,637
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM4040CIM7-2.5/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SC70-3 package, delivering a stable 2.5 V reverse breakdown voltage with ±0.5% initial tolerance (C grade), 100 ppm/°C max temperature coefficient, and 35 μVrms wideband noise (10 Hz–10 kHz). It operates from 60 μA to 15 mA over −40°C to +85°C and requires no output capacitor-used in analog input modules, field transmitters, and data acquisition systems where space and stability are critical.
For engineers reviewing the LM4040CIM7-2.5/NOPB datasheet, LM4040CIM7-2.5/NOPB pinout, LM4040CIM7-2.5/NOPB application, or LM4040CIM7-2.5/NOPB equivalent, this page provides verified electrical specs, SC70-3 terminal mapping, automotive-grade thermal hysteresis (0.08%), and direct alternatives for industrial and energy infrastructure designs.
Technical Context
The LM4040CIM7-2.5/NOPB uses Zener-zap trimming during wafer sort to achieve ±0.5% accuracy at 25°C and integrates bandgap-derived curvature correction for low drift across temperature. Its low dynamic impedance (0.3–0.9 Ω) ensures stable regulation under varying load currents.
Designed as a two-terminal shunt device, it functions with anode grounded and cathode supplying regulated voltage via external current source. It tolerates capacitive loads without oscillation and maintains stability from 60 μA minimum operating current up to 15 mA maximum.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V nominal reverse breakdown voltage, fixed and factory-trimmed-enables precise ADC/DAC biasing without adjustment. |
| Initial Tolerance | ±0.5% at 25°C (C grade)-supports 12-bit system accuracy without calibration in industrial sensor front-ends. |
| Temp Coefficient | ≤100 ppm/°C (max, −40°C to +85°C)-limits voltage drift to ±19 mV over full industrial range. |
| Output Noise | 35 μVrms (10 Hz–10 kHz)-minimizes added noise in high-resolution data acquisition signal chains. |
| Operating Current | 60 μA to 15 mA-allows ultra-low-power operation in battery-powered field transmitters and wide-range sourcing in PLC analog inputs. |
| Thermal Hysteresis | 0.08% (ΔT = −40°C to +125°C)-ensures repeatable voltage after thermal cycling in automotive and energy infrastructure environments. |
| Dynamic Impedance | 0.3–0.9 Ω (at 1 mA, 120 Hz)-provides tight load regulation (<8 mV change from 1 mA to 15 mA). |
Pinout & Package
LM4040CIM7-2.5/NOPB is packaged in a 3-pin SC70 (DCK) case measuring 2.00 mm × 1.25 mm. The device has no internal ground or supply pin-it operates as a two-terminal shunt: anode (pin 1) is grounded, cathode (pin 3) delivers the 2.5 V reference, and pin 2 is a no-connect (NC) terminal that must be left floating or tied to anode per TI layout guidance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Reference ground node | Must be connected to system ground; serves as return path for shunt current and defines reference potential. |
| Cathode (Pin 3) | Output voltage node | Delivers regulated 2.5 V when reverse-biased with external current source; connects to load or ADC reference input. |
| NC (Pin 2) | No-connect terminal | Internally unconnected; TI recommends leaving floating or tying to anode in EMI-sensitive layouts near switching noise sources. |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Stable operation with any capacitive load eliminates BOM cost and board area for stabilization components. |
| Micropower operation | 60 μA minimum current enables use in 4–20 mA loop-powered field instruments with minimal headroom impact. |
| Low thermal hysteresis | 0.08% voltage shift after −40°C/+125°C cycling ensures repeatability in automotive engine control and grid monitoring units. |
| Zener-zap voltage trim | Factory wafer-level trimming achieves ±0.5% initial accuracy without post-package calibration or laser adjustment. |
| SC70-3 footprint | 2.00 mm × 1.25 mm body size supports high-density PCB layouts in space-constrained IoT sensor nodes and modular I/O cards. |
Applications
| Field Transmitter | Data Acquisition |
|---|---|
Use Scenario: 4–20 mA current-loop transmitter conditioning analog sensor signals (e.g., pressure, temperature) before digitization. IC Role / Device Role / Timing Role: Shunt reference providing stable 2.5 V excitation and ADC reference for ratiometric measurement. Use Value: Enables <12-bit linearity without calibration by maintaining ±0.5% tolerance and ≤100 ppm/°C drift across −40°C to +85°C ambient. |
Use Scenario: High-resolution industrial DAQ module acquiring multiple analog channels with simultaneous sampling. IC Role / Device Role / Timing Role: Precision reference for SAR or sigma-delta ADCs requiring low-noise, low-drift voltage基准. Use Value: 35 μVrms noise and 0.3–0.9 Ω dynamic impedance minimize code spread and improve effective resolution beyond 16 bits. |
| Analog Input Module | Energy Infrastructure |
Use Scenario: Modular PLC analog input card accepting ±10 V, 0–10 V, or 4–20 mA signals with programmable gain and offset. IC Role / Device Role / Timing Role: Dual-role reference: excitation source for RTD/thermocouple circuits and ADC reference for digitized inputs. Use Value: Single-part solution reduces component count and improves channel-to-channel matching versus discrete resistor/Zener designs. |
Use Scenario: Smart meter or grid-edge protection relay requiring long-term voltage reference stability under thermal cycling and humidity stress. IC Role / Device Role / Timing Role: Primary reference for metrology-grade ADCs and fault-detection comparators. Use Value: 120 ppm long-term stability (1000 hrs) and 0.08% thermal hysteresis ensure accuracy compliance over 10+ year field life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C25IDBZR | 2.5 V, ±0.5%, SC70-3, but higher 50 μVrms noise and 1.2 Ω dynamic impedance. | Less suitable for >16-bit DAQ; acceptable for general-purpose analog input where noise budget allows +15 μVrms. | Select TL4050C25IDBZR only if TI second-source assurance is required and noise sensitivity is relaxed. |
| ADR3425ARJZ-R7 | 2.5 V, ±0.1%, SOT-23-5, series topology-not shunt-requires input voltage ≥2.75 V and external bypass cap. | Not drop-in compatible: needs higher supply, adds capacitor, occupies larger footprint; better for low-noise, low-drift priority over simplicity. | Choose ADR3425ARJZ-R7 when absolute lowest drift (3 ppm/°C) and noise (10 μVrms) outweigh layout complexity and supply margin constraints. |
Compared with TL4050C25IDBZR and ADR3425ARJZ-R7, LM4040CIM7-2.5/NOPB uniquely combines SC70-3 size, zero-capacitor operation, and 35 μVrms noise-making it optimal for space-constrained, low-headroom, high-fidelity analog signal conditioning where shunt architecture is preferred.
Availability
LM4040CIM7-2.5/NOPB is available at Aetrix Electronics and suitable for field transmitters, analog input modules, and data acquisition systems requiring stable component supply, long-lifecycle support, and automotive-qualified variants (LM4040CQIM7-2.5/NOPB).
Supply support for LM4040CIM7-2.5/NOPB 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 references and industrial-grade IC design.
LM4040-N is part of TI's precision shunt reference product line, engineered for high-accuracy, low-power, and thermally robust performance in industrial automation, energy metering, and automotive sensing applications.
FAQ
What is the operating temperature range for LM4040CIM7-2.5/NOPB?
The LM4040CIM7-2.5/NOPB is rated for industrial temperature operation from −40°C to +85°C. This range is validated per its Grade I specification and applies to all C-grade variants in SC70 packaging. It does not support extended −40°C to +125°C operation unless specified as Q1 automotive grade (e.g., LM4040CQIM7-2.5/NOPB). Thermal hysteresis and long-term stability data are confirmed within this industrial range.
Does LM4040CIM7-2.5/NOPB require an external capacitor for stability?
No, LM4040CIM7-2.5/NOPB does not require an external output capacitor. Its internal design ensures stability with any capacitive load-including ADC input capacitance or long PCB traces-eliminating the need for stabilization components. This simplifies layout and reduces BOM count, especially in compact field transmitter or sensor node designs where board space is constrained.
What is the minimum cathode current needed for LM4040CIM7-2.5/NOPB to regulate properly?
The LM4040CIM7-2.5/NOPB requires a minimum cathode current of 60 μA at 25°C to maintain regulation within specification. At full temperature range (−40°C to +85°C), the minimum increases to 65 μA. Below this threshold, output voltage deviates from 2.5 V, risking inaccuracies in low-power sensor interfaces or battery-operated devices-designers must ensure the current-setting resistor delivers ≥65 μA across worst-case temperature and supply conditions.
How does the noise performance of LM4040CIM7-2.5/NOPB compare to other 2.5 V shunt references?
LM4040CIM7-2.5/NOPB delivers 35 μVrms wideband noise (10 Hz–10 kHz), which is among the lowest in its class of micropower shunt references. This outperforms TL4050C25IDBZR (50 μVrms) and matches high-precision variants like REF5025 (35 μVrms). Its low noise directly improves effective resolution in 16-bit+ data acquisition systems where reference noise dominates total system error.
Can LM4040CIM7-2.5/NOPB be used in automotive applications?
The standard LM4040CIM7-2.5/NOPB is qualified for industrial use only. For automotive applications, TI offers the LM4040CQIM7-2.5/NOPB variant, which is AEC-Q100 Grade 3 qualified (−40°C to +85°C) and undergoes additional stress testing. Using the non-Q1 version in automotive systems may violate functional safety requirements and void warranty-always select the Q-suffix part for vehicle ECUs, ADAS sensors, or infotainment power rails.
LM4040CIM7-2.5/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.5V
- 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:
- SC-70-5
LM4040CIM7-2.5/NOPB FAQ
1.How can I place an order for LM4040CIM7-2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040CIM7-2.5/NOPB 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 LM4040CIM7-2.5/NOPB reliable?
The price and inventory of LM4040CIM7-2.5/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040CIM7-2.5/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040CIM7-2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040CIM7-2.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040CIM7-2.5/NOPB?
LM4040CIM7-2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040CIM7-2.5/NOPB 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 LM4040CIM7-2.5/NOPB?
For technical support, including LM4040CIM7-2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040CIM7-2.5/NOPB requirements.
6.How does Aetrix verify that LM4040CIM7-2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040CIM7-2.5/NOPB 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 LM4040CIM7-2.5/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040CIM7-2.5/NOPB?
All LM4040CIM7-2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040CIM7-2.5/NOPB, 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 LM4040CIM7-2.5/NOPB part is unused and in its original packaging.
Return procedure for LM4040CIM7-2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040CIM7-2.5/NOPB 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…
