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Texas Instruments LM4040CIZ-5.0
- Part No.:
- LM4040CIZ-5.0
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
LM4040CIZ-5.0.pdf
- Description:
- IC VREF SHUNT 0.5% TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,890
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Product details
Overview
LM4040CIZ-5.0 from Texas Instruments is a precision micropower shunt voltage reference with 5.0 V nominal reverse breakdown voltage, ±0.5% initial tolerance (C grade), 100 ppm/°C max temperature coefficient, and operation from 74 μA to 15 mA over −40°C to +85°C. It serves as a stable voltage reference in analog-to-digital converters and portable instrumentation where low quiescent current and minimal board space are critical.
For engineers reviewing the LM4040CIZ-5.0 datasheet, LM4040CIZ-5.0 pinout, LM4040CIZ-5.0 application, or LM4040CIZ-5.0 equivalent, this page delivers verified specifications, TO-92 package details, shunt reference circuit role, thermal hysteresis (0.08%), and direct alternative part guidance for industrial and battery-powered designs.
Technical Context
The LM4040CIZ-5.0 operates as a two-terminal shunt reference: cathode accepts input current and regulates output voltage at the anode–cathode junction. Its bandgap-based Zener-zap trimmed architecture achieves ±0.5% accuracy at 25°C and maintains stability across capacitive loads without external compensation.
It features curvature-corrected temperature drift compensation and low dynamic impedance (≤0.9 Ω at 1 mA), enabling precise voltage setting in data acquisition front-ends and energy metering circuits where load regulation error must stay below 8 mV across 1 mA to 15 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V nominal reverse breakdown voltage - sets precise reference point for ADCs and comparators. |
| Initial Tolerance | ±0.5% at 25°C (C grade) - ensures ≤25 mV absolute error before temperature or aging effects. |
| Temp Coefficient | ≤100 ppm/°C - contributes ≤32.5 mV drift over −40°C to +85°C (ΔT = 125°C). |
| Operating Current | 74 μA to 15 mA - supports ultra-low-power sensor nodes and high-current calibration circuits. |
| Dynamic Impedance | ≤0.9 Ω at 1 mA - minimizes load-induced voltage shift in varying current conditions. |
| Wideband Noise | 35 μVrms (10 Hz–10 kHz) - preserves signal integrity in high-resolution 16-bit+ data acquisition. |
| Thermal Hysteresis | 0.08% - limits repeatability error after thermal cycling between −40°C and +125°C. |
Pinout & Package
LM4040CIZ-5.0 is packaged in a 3-pin TO-92 (LP) body measuring 4.30 mm × 4.30 mm, with axial leads suitable for through-hole PCB assembly and prototyping. The device has no internal die attach pad or exposed thermal slug.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Reference ground node | Connected to system ground; defines 0 V reference for cathode voltage regulation. |
| Cathode (Pin 2) | Shunt current input / regulated output | Receives bias current; develops stable 5.0 V relative to anode under defined operating current. |
| NC (Pin 3) | No-connect terminal | Internally unconnected; must be left floating or tied to Pin 1 (anode) per datasheet guidance. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables single-component reference design in space-constrained layouts without stability risk. |
| Tolerates capacitive loads | Stable with any value of output capacitance - simplifies filtering in noisy environments. |
| Low 74 μA minimum operating current | Extends battery life in portable equipment; compatible with microcontroller GPIO-driven biasing. |
| Industrial temperature range | Guaranteed performance from −40°C to +85°C - suitable for factory automation and outdoor sensors. |
| Fuse-and-Zener-zap trimming | Ensures production-grade accuracy without post-package calibration or sorting. |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Handheld multimeter with 20-bit SAR ADC and battery-powered operation. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 5.0 V reference for ADC full-scale calibration. Use Value: ±0.5% initial tolerance and 35 μVrms noise ensure <1 LSB error in 20-bit conversion at room temperature. |
Use Scenario: Industrial PLC analog input module measuring 4–20 mA sensor signals. IC Role / Device Role / Timing Role: Precision reference for op-amp-based current-to-voltage conversion and ADC reference rail. Use Value: 100 ppm/°C tempco and 0.08% thermal hysteresis maintain <0.1% total error across ambient shifts and power cycles. |
| Energy Management Meters | Automotive Body Control Modules |
Use Scenario: Residential smart electricity meter requiring metrology-grade voltage scaling. IC Role / Device Role / Timing Role: Reference source for anti-aliasing filter gain setting and ADC reference in polyphase metering SoC. Use Value: Low 74 μA min current enables direct bias from isolated DC-DC converter, reducing standby power. |
Use Scenario: In-vehicle cabin temperature sensor interface with extended temperature qualification. IC Role / Device Role / Timing Role: Stable 5.0 V reference for thermistor signal conditioning amplifier and microcontroller ADC. Use Value: TO-92 package withstands reflow and mechanical stress; guaranteed operation to +85°C meets automotive interior requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431ACLP | 3-terminal adjustable shunt reference; 2.495 V nominal, ±1% tolerance, higher 1 mA min current. | Requires external resistors to set 5.0 V; not drop-in - needs PCB redesign and loop compensation. | Select when programmability or tighter long-term stability (±0.5% over 1000 hrs) is prioritized over footprint and simplicity. |
| MAX6008AEUR+T | 5.0 V fixed shunt reference; ±0.2% initial tolerance, SOT-23-3 package, 60 μA min current. | Smaller footprint and tighter tolerance, but rated only to +85°C and lacks AEC-Q200 qualification. | Prefer for space-limited consumer electronics where automotive qualification is unnecessary and lower min current is critical. |
Compared with TL431ACLP and MAX6008AEUR+T, LM4040CIZ-5.0 offers TO-92 mechanical robustness, guaranteed C-grade tolerance without external components, and seamless integration into legacy through-hole designs - making it optimal for cost-sensitive industrial instrumentation where layout change is constrained.
Availability
LM4040CIZ-5.0 is available at Aetrix Electronics and suitable for portable instrumentation, data acquisition systems, and energy management meters requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.
Supply support for LM4040CIZ-5.0 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, embedded processing, and connectivity technologies, with decades of expertise in precision analog ICs.
The LM4040-N series was designed specifically for space-constrained, low-power shunt reference applications - delivering factory-trimmed accuracy, wide current range operation, and compatibility with capacitive loads without external stabilization.
FAQ
What is the minimum operating current for LM4040CIZ-5.0?
The LM4040CIZ-5.0 requires a minimum operating current of 74 μA at 25°C to maintain regulation within specification. This value increases slightly over temperature, reaching up to 78 μA at +85°C. Below this threshold, the device may not sustain its rated 5.0 V output or specified tolerance, especially under load or temperature variation. Designers must ensure bias networks deliver ≥74 μA across all operating conditions.
Is LM4040CIZ-5.0 pin-compatible with other LM4040 variants in TO-92?
Yes, LM4040CIZ-5.0 shares identical TO-92 (LP) pinout and mechanical dimensions with all other LM4040-N TO-92 variants, including LM4040AIZ-5.0 and LM4040BIZ-5.0. Pin 1 is Anode, Pin 2 is Cathode, and Pin 3 is NC - with the same floating-or-tied-to-anode requirement. Electrical differences (tolerance, tempco) do not affect physical compatibility.
Does LM4040CIZ-5.0 require an output capacitor for stability?
No, LM4040CIZ-5.0 does not require an output capacitor for stability. Its internal design eliminates the need for external compensation, and it remains stable with any capacitive load - including large bulk capacitors used for noise filtering in sensitive measurement circuits. This simplifies layout and reduces BOM count.
What is the thermal hysteresis specification for LM4040CIZ-5.0?
LM4040CIZ-5.0 exhibits 0.08% thermal hysteresis - defined as the voltage difference measured at 25°C after cycling to −40°C versus after cycling to +125°C. For the 5.0 V output, this equates to ≤4 mV hysteresis error, ensuring repeatable reference accuracy across thermal duty cycles in field-deployed equipment.
Can LM4040CIZ-5.0 be used in automotive applications?
LM4040CIZ-5.0 is qualified for industrial temperature range (−40°C to +85°C) and is not AEC-Q200 certified. While it functions reliably in automotive cabin environments, TI recommends the LM4040CQIZ-5.0 (Q1 grade) for automotive applications requiring formal qualification. Use LM4040CIZ-5.0 only in non-safety-critical, non-qualified automotive subsystems where full compliance is not mandated.
LM4040CIZ-5.0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA)
- Series:
- -
- Packaging:
- Box
- Product Status:
- Obsolete
- 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:
- 80 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
LM4040CIZ-5.0 FAQ
1.How can I place an order for LM4040CIZ-5.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040CIZ-5.0 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 LM4040CIZ-5.0 reliable?
The price and inventory of LM4040CIZ-5.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040CIZ-5.0 is usually 5 days.
3.What payment methods are accepted for LM4040CIZ-5.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040CIZ-5.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040CIZ-5.0?
LM4040CIZ-5.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040CIZ-5.0 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 LM4040CIZ-5.0?
For technical support, including LM4040CIZ-5.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040CIZ-5.0 requirements.
6.How does Aetrix verify that LM4040CIZ-5.0 is sourced from the original manufacturer or authorized distributors?
All LM4040CIZ-5.0 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 LM4040CIZ-5.0 meets industry standards.
7.What is the process for return or replacement of LM4040CIZ-5.0?
All LM4040CIZ-5.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040CIZ-5.0, 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 LM4040CIZ-5.0 part is unused and in its original packaging.
Return procedure for LM4040CIZ-5.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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