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Texas Instruments LM4040D25IDCKT
- Part No.:
- LM4040D25IDCKT
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LM4040D25IDCKT.pdf
- Description:
- IC VREF SHUNT 1% SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:6,978
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Product details
Overview
LM4040D25IDCKT from Texas Instruments is a precision micropower shunt voltage reference with a fixed 2.5V output, D-grade (±1.0% initial tolerance, 150ppm/°C tempco), rated for –40°C to 85°C operation, packaged in SC-70 (DCK) with 5 pins (2 NC), and used in high-accuracy analog input modules and data-acquisition systems requiring stable low-current biasing.
For engineers reviewing the LM4040D25IDCKT datasheet, LM4040D25IDCKT pinout, LM4040D25IDCKT application, or LM4040D25IDCKT equivalent, key selection criteria include cathode current range (45μA–15mA), dynamic impedance (≤1.1Ω), wide-capacitive-load stability, thermal hysteresis (0.08%), and compatibility with portable and industrial signal conditioning designs.
Technical Context
The LM4040D25IDCKT operates as a two-terminal shunt reference, sinking cathode current (IZ) to regulate voltage across its cathode-anode terminals. Its Zener-zap trimmed bandgap core delivers 2.5V nominal output with D-grade accuracy and 150ppm/°C temperature coefficient over –40°C to 85°C.
It requires no external capacitor, maintains low noise (35μVRMS, 10Hz–10kHz), exhibits low dynamic impedance (≤1.1Ω at 1mA), and achieves long-term stability of 120ppm after 1000 hours - enabling direct integration into precision ADC bias networks and sensor excitation circuits without layout sensitivity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5V ±25mV (±1.0% initial tolerance at 100μA, 25°C) |
| Tempco | 150ppm/°C max (ensures ≤±2.5mV drift over full –40°C to 85°C range) |
| Cathode Current Range | 45μA to 15mA (supports ultra-low-power sensor bias and high-precision DAC reference) |
| Dynamic Impedance | ≤1.1Ω at 1mA (minimizes load-induced output variation in varying current conditions) |
| Output Noise | 35μVRMS (10Hz–10kHz, 100μA bias; critical for 16-bit+ ADC reference stability) |
| Thermal Hysteresis | 0.08% (≈2mV for 2.5V; ensures repeatable voltage after thermal cycling) |
| Long-Term Stability | 120ppm (ΔVZ after 1000h at 25°C; supports 10+ year system calibration integrity) |
Pinout & Package
LM4040D25IDCKT uses the 5-pin SC-70 (DCK) package (2.00mm × 1.25mm), with pins 4 and 5 designated as No Connect (NC). The device functions as a 2-terminal shunt reference; only Cathode (Pin 3) and Anode (Pin 1) carry active current.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 3) | Shunt current input / voltage regulation node | Sinks all operating current; connects to supply rail via series resistor; output voltage appears between this pin and Anode |
| Anode (Pin 1) | Common reference node / ground return | Typically tied to system ground; forms the reference potential for regulated 2.5V output |
| NC (Pins 4, 5) | No internal connection | Must be left floating or grounded per layout best practice; no electrical function |
| Pin 2 (*) | Internal Zener tap / EMI mitigation node | Optional connection to Anode in noisy environments to reduce high-frequency coupling; not required for basic operation |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 2.5V output with D-grade tolerance | Enables cost-optimized precision referencing where ±1% initial accuracy suffices (e.g., industrial sensor front-ends) |
| Stable with all capacitive loads | Eliminates need for output capacitor - simplifies PCB layout and reduces BOM count in space-constrained modules |
| 45μA minimum cathode current | Supports battery-powered applications with sub-100μA system standby budgets |
| Low 35μVRMS broadband noise | Preserves ENOB in 16-bit SAR ADCs without additional filtering or post-regulation |
| SC-70 package (2.00mm × 1.25mm) | Reduces board area by >50% vs. SOT-23 while maintaining hand-solderability and reflow compatibility |
Applications
| Data-Acquisition Systems | Analog Input Module |
|---|---|
Use Scenario: High-channel-count industrial DAQ unit digitizing 4–20mA sensor signals with 16-bit resolution. IC Role / Device Role / Timing Role: Provides stable 2.5V reference for successive-approximation ADC and programmable-gain amplifier biasing. Use Value: Maintains <±0.5 LSB error over temperature due to 150ppm/°C tempco and 0.08% thermal hysteresis. | Use Scenario: DIN-rail mounted analog input card accepting ±10V, 0–10V, and thermocouple inputs. IC Role / Device Role / Timing Role: Serves as primary reference for multiplexed instrumentation amplifier gain-setting and ADC conversion. Use Value: Delivers consistent 2.5V despite wide ambient swings (–40°C to 85°C) and load current variations (45μA–10mA). |
| Energy Infrastructure | Field Transmitters |
Use Scenario: Smart electricity meter measuring voltage/current with metrology-grade accuracy. IC Role / Device Role / Timing Role: Supplies reference voltage to isolation-amplifier feedback path and energy calculation ASIC. Use Value: Long-term stability (120ppm/1000h) ensures calibration holdover beyond 10-year utility deployment cycles. | Use Scenario: Loop-powered 4–20mA transmitter for pressure/temperature sensing in oil & gas plants. IC Role / Device Role / Timing Role: Generates precise 2.5V for sensor excitation and DAC-controlled current loop modulation. Use Value: Low 45μA min current enables operation within strict 3.5mA loop budget while maintaining ±1% output accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040C25IDCKT | 0.5% initial tolerance, 100ppm/°C tempco (C-grade), same SC-70 package and 2.5V output | Better accuracy/stability for higher-end DAQ or metrology; requires tighter thermal management | Select when ±0.5% initial error and lower tempco justify cost premium over D-grade |
| TLVH431ACDBVR | Adjustable 1.24V–18V shunt reference, 0.5% tolerance, SOT-23-5, 80μA min cathode current | Offers programmability but higher min current and larger package; less optimal for fixed 2.5V ultra-low-power use | Choose only if design requires adjustable output or dual-voltage support; not a drop-in replacement |
Compared with LM4040C25IDCKT, the LM4040D25IDCKT trades 0.5% initial accuracy and 50ppm/°C tempco for lower cost and sufficient performance in cost-sensitive industrial transmitters; versus TLVH431ACDBVR, it provides lower quiescent current and smaller footprint but lacks adjustability.
Availability
LM4040D25IDCKT is available at Aetrix Electronics and suitable for data-acquisition systems, analog input modules, and field transmitters requiring stable component supply with guaranteed long-term manufacturability and consistent parametric performance.
Supply support for LM4040D25IDCKT 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, embedded processing, and power management technologies.
The LM4040 series was designed for precision, low-power shunt voltage referencing in industrial, energy, and sensor signal chains - emphasizing micropower operation, capacitive-load immunity, and robust thermal performance.
FAQ
What is the maximum cathode current rating for LM4040D25IDCKT?
The absolute maximum cathode current for LM4040D25IDCKT is 25mA, but the recommended operating range is 45μA to 15mA per TI's Electrical Characteristics tables. Exceeding 15mA risks exceeding thermal limits in the SC-70 package, especially above 85°C ambient. The LM4040D25IDCKT must be derated per its RθJA of 252°C/W to avoid junction temperatures above 150°C.
Does LM4040D25IDCKT require an output capacitor for stability?
No, LM4040D25IDCKT is explicitly characterized as stable with all capacitive loads and requires no output capacitor - a key differentiator from series references. This is confirmed in the "Features" and "Description" sections of the TI datasheet (SLOS456Q), enabling simplified layout in space-constrained analog front-ends where LM4040D25IDCKT serves as the reference node.
What is the thermal hysteresis specification for LM4040D25IDCKT?
The thermal hysteresis for LM4040D25IDCKT is 0.08%, equivalent to approximately ±2mV on its 2.5V output. This value is measured as the voltage difference at 25°C before and after cycling between –40°C and +125°C, and applies identically across all LM4040 grades and variants including LM4040D25IDCKT per Section 6.5–6.10 of the datasheet.
Can LM4040D25IDCKT be used in automotive applications?
LM4040D25IDCKT is qualified for –40°C to +85°C (industrial grade), not the extended –40°C to +125°C automotive AEC-Q100 temperature range. For automotive use, TI offers the LM4040D25Q variant (e.g., LM4040D25QDBZR); LM4040D25IDCKT is intended for industrial, energy, and commercial systems where ambient does not exceed 85°C.
How does the pin configuration of LM4040D25IDCKT differ from the SOT-23 version?
LM4040D25IDCKT uses the 5-pin SC-70 (DCK) package with Cathode on Pin 3, Anode on Pin 1, and Pins 4 & 5 as NC; the SOT-23 (DBZ) version is 3-pin with Cathode on Pin 1 and Anode on Pin 2. Pin 2 in DCK is an internal Zener tap for EMI mitigation - unused in DBZ. Layout and routing must account for these distinct pinouts; LM4040D25IDCKT is not pin-compatible with LM4040D25IDBVR.
LM4040D25IDCKT 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:
- ±1%
- Temperature Coefficient:
- 150ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 35µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 80 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
LM4040D25IDCKT FAQ
1.How can I place an order for LM4040D25IDCKT through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040D25IDCKT 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 LM4040D25IDCKT reliable?
The price and inventory of LM4040D25IDCKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040D25IDCKT is usually 5 days.
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We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040D25IDCKT transactions.
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4.How is shipping managed for LM4040D25IDCKT?
LM4040D25IDCKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040D25IDCKT 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 LM4040D25IDCKT?
For technical support, including LM4040D25IDCKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040D25IDCKT requirements.
6.How does Aetrix verify that LM4040D25IDCKT is sourced from the original manufacturer or authorized distributors?
All LM4040D25IDCKT 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 LM4040D25IDCKT meets industry standards.
7.What is the process for return or replacement of LM4040D25IDCKT?
All LM4040D25IDCKT units undergo pre-shipment inspection (PSI). If there is an issue with LM4040D25IDCKT, 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 LM4040D25IDCKT part is unused and in its original packaging.
Return procedure for LM4040D25IDCKT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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