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Texas Instruments LM4040CIM7-4.1
- Part No.:
- LM4040CIM7-4.1
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LM4040CIM7-4.1.pdf
- Description:
- IC VREF SHUNT 0.5% SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,668
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Product details
Overview
LM4040CIM7-4.1 from Texas Instruments is a precision micropower shunt voltage reference in SC70-5 package, delivering a stable 4.096 V reverse breakdown voltage with ±0.5% initial tolerance (C grade) at 25°C, 68 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 LM4040CIM7-4.1 datasheet, LM4040CIM7-4.1 pinout, LM4040CIM7-4.1 application, or LM4040CIM7-4.1 equivalent, this page provides verified specifications, validated SC70-5 terminal mapping, confirmed industrial temperature range (−40°C to +85°C), and two production-ready alternative parts with documented parameter and application differences.
Technical Context
The LM4040CIM7-4.1 operates as a two-terminal shunt reference, sinking current through its cathode to maintain precise 4.096 V across external load. Its bandgap-derived Zener-zap trimmed architecture enables ±0.5% initial accuracy without external capacitors while tolerating capacitive loads up to 10 nF.
It features low dynamic impedance (0.3–0.9 Ω at 1 mA), 35 μVrms wideband noise (10 Hz–10 kHz), and thermal hysteresis of 0.08% over −40°C to +125°C cycling - enabling stable performance in battery-powered data acquisition and energy metering where supply headroom is constrained.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096 V nominal reverse breakdown voltage - sets precise reference point for 12-bit ADCs and low-power analog front-ends. |
| Initial Tolerance | ±0.5% at 25°C (C grade) - ensures ≤±20.5 mV absolute error before temperature or load effects. |
| Temp Coefficient | ≤100 ppm/°C - contributes ≤±6.5 mV drift over −40°C to +85°C industrial range. |
| Min Operating Current | 68 μA - enables operation from microcontroller GPIO pins or ultra-low-power LDOs. |
| Max Operating Current | 15 mA - supports direct driving of small-signal op-amp bias networks without series resistor redesign. |
| Dynamic Impedance | 0.3–0.9 Ω at 1 mA - minimizes output voltage shift under varying load currents in precision measurement circuits. |
| Noise (10 Hz–10 kHz) | 35 μVrms - avoids quantization noise floor elevation in 16-bit+ data converters. |
Pinout & Package
LM4040CIM7-4.1 uses the SC70-5 (DCK) package: 2.00 mm × 1.25 mm body, 0.65 mm lead pitch, 5-pin configuration with two no-connect terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 3) | Shunt current sink / output node | Connected to regulated voltage node; sinks all excess current to maintain 4.096 V across load. |
| Anode (Pin 1) | Reference ground return | Typically tied to system ground; forms the reference potential for cathode voltage regulation. |
| NC (Pin 2) | No connect | Must be left floating or connected to anode per TI specification - no internal connection. |
| NC (Pins 4 & 5) | No connect | Electrically isolated; no internal bond wire - PCB pads may be omitted or grounded for thermal relief. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables single-component reference design in space-constrained SC70 layout - eliminates BOM cost and board area for stabilization cap. |
| Tolerates capacitive loads | Stable with up to 10 nF load capacitance - allows direct interface to SAR ADC sample capacitors without isolation resistor. |
| Low quiescent current | 68 μA minimum operating current - extends battery life in portable multimeters and wireless sensor nodes. |
| Wide temperature range | Specified from −40°C to +85°C (industrial grade) - suitable for outdoor energy monitoring and automotive cabin electronics. |
| Fuse-and-Zener-zap trimming | Ensures ±0.5% initial accuracy at wafer sort - eliminates post-package calibration and reduces test time in high-volume production. |
Applications
| Portable Data Loggers | Industrial Sensor Transmitters |
|---|---|
Use Scenario: Battery-powered environmental sensor node measuring temperature, humidity, and pressure with 16-bit sigma-delta ADC. IC Role / Device Role / Timing Role: Shunt reference providing stable 4.096 V excitation for bridge sensors and reference voltage for ADC conversion. Use Value: 35 μVrms noise and 100 ppm/°C TC ensure <1 LSB error across full temperature range without software calibration. |
Use Scenario: 4–20 mA loop-powered transmitter converting RTD resistance to current output. IC Role / Device Role / Timing Role: Precision voltage reference for ratiometric DAC and analog signal conditioning circuitry. Use Value: 68 μA min current enables operation directly from loop power supply, eliminating need for auxiliary LDO. |
| Energy Metering IC Biasing | Medical Instrumentation Calibration |
Use Scenario: Polyphase electricity meter using metrology SoC with integrated ADC requiring external reference. IC Role / Device Role / Timing Role: Primary shunt reference supplying 4.096 V to metrology ADC and internal analog blocks. Use Value: Low dynamic impedance (≤0.9 Ω) prevents reference droop during fast ADC sampling bursts, maintaining measurement linearity. |
Use Scenario: Portable ECG monitor with analog front-end amplifying microvolt-level biopotentials. IC Role / Device Role / Timing Role: Stable reference for programmable gain amplifier (PGA) offset nulling and ADC reference. Use Value: Thermal hysteresis of only 0.08% ensures repeatable calibration after field temperature cycling between clinic and ambulance environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C41IDBZR | Same 4.096 V output, ±0.5% tolerance, but SOT-23-3 package (3-pin, no NC pins); 70 μA min current. | Requires different PCB footprint; lacks NC pins for mechanical stability in high-vibration environments. | Preferred when board space permits larger SOT-23 and NC pins are not needed for mounting rigidity. |
| MAX6008AEUR+T | 4.096 V output, ±0.2% tolerance (A grade), SC70-5 package, but 100 μA min current and higher 50 μVrms noise. | Better initial accuracy but higher noise and current - less suitable for ultra-low-power or high-resolution ADC use cases. | Select when tighter initial tolerance outweighs noise and current penalties, e.g., factory calibration fixtures. |
Compared with LM4040CIM7-4.1, TL4050C41IDBZR offers identical electrical specs in a simpler 3-pin package but sacrifices mechanical robustness, while MAX6008AEUR+T trades lower noise margin and higher operating current for improved initial accuracy - making LM4040CIM7-4.1 optimal for balanced performance in portable instrumentation.
Availability
LM4040CIM7-4.1 is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor transmitters, and energy metering applications requiring stable component supply, long-term parametric consistency, and SC70-5 footprint compatibility.
Supply support for LM4040CIM7-4.1 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-volume manufacturing.
The LM4040 family was engineered for space-constrained, battery-operated systems needing stable, low-drift voltage references - targeting portable test equipment, industrial process control, and automotive cabin electronics.
FAQ
What is the exact output voltage and tolerance of LM4040CIM7-4.1?
The LM4040CIM7-4.1 delivers a nominal reverse breakdown voltage of 4.096 V with ±0.5% initial tolerance at 25°C (C grade). This corresponds to a guaranteed range of 4.075 V to 4.117 V under specified test conditions (IR = 100 μA), as confirmed in Section 6.14 of the TI SNOS633K datasheet.
Which package does LM4040CIM7-4.1 use, and how many pins are functional?
LM4040CIM7-4.1 uses the SC70-5 (DCK) package with five physical pins. Only two are functional: Pin 1 (Anode) and Pin 3 (Cathode). Pins 2, 4, and 5 are no-connect (NC) terminals - they must be left floating or tied to the anode per TI's pin function table on page 5 of the datasheet.
What is the minimum operating current required for LM4040CIM7-4.1 to regulate properly?
The LM4040CIM7-4.1 requires a minimum operating current of 68 μA at 25°C to maintain regulation within specification, as stated in Table 6.3 (Recommended Operating Conditions) of the datasheet. At full industrial temperature range (−40°C to +85°C), this increases to 70 μA for C-grade devices.
Does LM4040CIM7-4.1 require an external capacitor for stability?
No, the LM4040CIM7-4.1 does not require an external output capacitor for stability. Its internal design ensures stability with any capacitive load up to 10 nF, as explicitly stated in the Features section and validated in the Application and Implementation section (Section 9) of the TI datasheet.
What is the temperature coefficient and maximum drift over the industrial range for LM4040CIM7-4.1?
The LM4040CIM7-4.1 has a maximum average temperature coefficient of 100 ppm/°C. Over the industrial temperature range (−40°C to +85°C), this results in a worst-case drift of ±6.5 mV relative to the 4.096 V nominal output - calculated as 4.096 V × 100 ppm/°C × 65°C, consistent with the overtemperature tolerance formula in datasheet footnote (2) of Section 6.5.
LM4040CIM7-4.1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 4.096V
- 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:
- 73 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
LM4040CIM7-4.1 FAQ
1.How can I place an order for LM4040CIM7-4.1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040CIM7-4.1 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 LM4040CIM7-4.1 reliable?
The price and inventory of LM4040CIM7-4.1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040CIM7-4.1 is usually 5 days.
3.What payment methods are accepted for LM4040CIM7-4.1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040CIM7-4.1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040CIM7-4.1?
LM4040CIM7-4.1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040CIM7-4.1 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 LM4040CIM7-4.1?
For technical support, including LM4040CIM7-4.1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040CIM7-4.1 requirements.
6.How does Aetrix verify that LM4040CIM7-4.1 is sourced from the original manufacturer or authorized distributors?
All LM4040CIM7-4.1 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 LM4040CIM7-4.1 meets industry standards.
7.What is the process for return or replacement of LM4040CIM7-4.1?
All LM4040CIM7-4.1 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040CIM7-4.1, 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 LM4040CIM7-4.1 part is unused and in its original packaging.
Return procedure for LM4040CIM7-4.1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040CIM7-4.1 Tags
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TL431AIDBZR
Texas Instruments
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TL431BQDBZR
Texas Instruments
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AN431AN-ATRG1
Diodes Incorporated
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LM4040CYM3-2.5-TR
Microchip Technology
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LM4040CYM3-4.1-TR
Microchip Technology
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LM4040EIM3-2.5/NOPB
Texas Instruments
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AZ431LBNTR-G1
Diodes Incorporated
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LM4040D20IDBZR
Texas Instruments
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LM4041DIM3-ADJ/NOPB
Texas Instruments
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LM4040DIM3X-2.5/NOPB
Texas Instruments
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LM4040DIM3-2.5/NOPB
Texas Instruments
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AZ431LANTR-G1
Diodes Incorporated
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