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Analog Devices Inc./Maxim Integrated LM4040BIX3-3.0
- Part No.:
- LM4040BIX3-3.0
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4040BIX3-3.0.pdf
- Description:
- PRECISION MICROPOWER SHUNT VREF
- Quantity:
- Payment:
- Shipping:
Inventory:1,176
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Product details
Overview
LM4040BIX3-3.0 from Maxim Integrated is a precision 3.000V two-terminal shunt voltage reference in SC70-3 package, featuring ±0.2% initial accuracy, ±15ppm/°C temperature coefficient over –40°C to +85°C, 60µA–15mA operating current range, and 45µVRMS wideband noise (10Hz–10kHz). It serves as a stable reference for ADC/DAC biasing, portable power monitoring, and battery voltage regulation circuits.
For engineers reviewing the LM4040BIX3-3.0 datasheet, LM4040BIX3-3.0 pinout, LM4040BIX3-3.0 application, or LM4040BIX3-3.0 equivalent, this page delivers verified electrical parameters, SC70-3 terminal mapping, real-world use cases in space-constrained systems, and validated alternative options for voltage reference selection.
Technical Context
The LM4040BIX3-3.0 implements a bandgap-based shunt architecture with laser-trimmed resistors for factory calibration. Its output voltage remains stable without external capacitors, even under capacitive loads up to 10µF, due to inherent low dynamic impedance (≤0.8Ω at 1mA).
It operates as a two-terminal device: reverse-biased between cathode (Pin 2) and anode (Pin 1), with Pin 3 unconnected or tied to Pin 2. The reference maintains regulation across 60µA–15mA shunt current while exhibiting ≤3.0mV voltage change over full current range (1–15mA) and ≤26mV total tolerance over –40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.000V nominal; guaranteed 2.994V–3.006V at +25°C (B-grade), enabling precise 12-bit ADC reference scaling. |
| Initial Accuracy | ±0.2% (±6mV); ensures <±1 LSB error in 10-bit systems without trimming. |
| Tempco | ±15ppm/°C max; contributes ≤±0.98mV drift over –40°C to +85°C, critical for industrial sensor front-ends. |
| Operating Current | 60µA–15mA; supports ultra-low-power wake-up references and high-current precision DACs. |
| Noise (10Hz–10kHz) | 45µVRMS; limits quantization noise in 16-bit SAR ADC applications. |
| Dynamic Impedance | 0.3–0.8Ω at 1mA; maintains <1mV output shift during 10mA load transients. |
| Long-Term Stability | 120ppm after 1000h; ensures <±0.36mV drift over 5-year product lifetime. |
Pinout & Package
LM4040BIX3-3.0 uses the 3-pin SC70 surface-mount package (1.8mm × 1.8mm), 50% smaller than SOT23-3. Pin 3 is NC and must be left floating or connected to Pin 2 per datasheet requirement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (+) | Anode (positive terminal) | Connects to system ground or low-side return path; reverse current flows from Pin 2 to Pin 1. |
| Pin 2 (−) | Cathode (negative terminal) | Connected to regulated voltage node; sinks shunt current to maintain 3.000V across terminals. |
| Pin 3 (N.C.) | No connection | Must remain unconnected or shorted to Pin 2; no internal function-floating improves thermal stability. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 footprint | 1.8mm × 1.8mm area saves >50% PCB space vs. SOT23-3, ideal for wearables and compact IoT sensors. |
| No output capacitor required | Stable with any capacitive load (0–10µF), eliminating BOM cost and layout constraints for decoupling. |
| Low 45µVRMS noise | Enables high-resolution analog measurements without additional filtering in portable medical devices. |
| Wide 60µA–15mA current range | Supports both micropower sleep modes (<100µA) and active high-precision conversion (>10mA). |
| Guaranteed operation –40°C to +85°C | Validated performance across automotive cabin and industrial control ambient conditions. |
Applications
| Portable Battery Monitoring | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Real-time Li-ion cell voltage measurement in Bluetooth earbuds with 3.3V supply. IC Role / Device Role / Timing Role: Shunt reference providing stable 3.000V基准 for 12-bit ADC input scaling. Use Value: ±6mV initial error enables accurate state-of-charge estimation within ±1% margin. |
Use Scenario: 4–20mA loop-powered pressure transmitter with microcontroller-based signal processing. IC Role / Device Role / Timing Role: Precision voltage reference for DAC output calibration and sensor excitation. Use Value: ±15ppm/°C tempco ensures <±0.5% full-scale error across –25°C to +70°C operating range. |
| Medical Wearable ECG Front-End | Automotive Cabin Temperature Sensor |
Use Scenario: Low-noise analog front-end for single-lead ECG acquisition in patch monitors. IC Role / Device Role / Timing Role: Reference source for instrumentation amplifier gain setting and ADC reference. Use Value: 45µVRMS noise prevents degradation of 100dB SNR target in sub-100Hz biopotential bands. |
Use Scenario: NTC thermistor interface in HVAC control module requiring stable 3.0V bias. IC Role / Device Role / Timing Role: Shunt reference generating fixed voltage for ratiometric thermistor bridge excitation. Use Value: 120ppm long-term stability avoids recalibration over 10-year vehicle service 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 |
|---|---|---|---|
| TL4050B30IDBZR | 3.0V output, ±0.2% accuracy, 75ppm/°C tempco, SOT23-3 package, 60µA–15mA range | Higher tempco increases drift by ~1.2mV over –40°C to +85°C vs. LM4040BIX3-3.0 | Choose when SOT23-3 footprint is mandatory and ±1.2mV extra drift is acceptable. |
| ADR3430ARJZ-R7 | 3.0V output, ±0.1% accuracy, 10ppm/°C tempco, SOT23-6 package, 100µA–10mA range | Lower noise (24µVRMS), but requires 3x higher minimum current and larger 6-pin package | Choose when ultra-low drift and noise are critical, and board space allows SOT23-6. |
Compared with TL4050B30IDBZR, LM4040BIX3-3.0 offers tighter thermal stability for industrial sensing; compared with ADR3430ARJZ-R7, it provides lower minimum operating current and smaller SC70-3 footprint for space-constrained portable designs.
Availability
LM4040BIX3-3.0 is available at Aetrix Electronics and suitable for portable medical devices, industrial sensor modules, and automotive cabin electronics requiring stable component supply with guaranteed long-term availability.
Supply support for LM4040BIX3-3.0 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
Maxim Integrated (now part of Analog Devices) designs precision analog and mixed-signal ICs for demanding industrial, medical, and communications applications.
The LM4040 product line delivers micropower shunt voltage references optimized for space-constrained, battery-operated systems requiring high initial accuracy and low temperature drift without external compensation.
FAQ
What is the maximum shunt current rating for LM4040BIX3-3.0?
The absolute maximum reverse current for LM4040BIX3-3.0 is 20mA per Absolute Maximum Ratings. For reliable operation, the recommended continuous shunt current range is 60µA to 15mA. Exceeding 15mA risks thermal overload and long-term parameter shift, especially at elevated ambient temperatures above +70°C.
Can LM4040BIX3-3.0 be used with a 10µF output capacitor?
Yes, LM4040BIX3-3.0 is explicitly designed to remain stable with any capacitive load, including 10µF. Unlike many shunt references, it does not require minimum ESR or external series resistance for phase margin-its internal architecture ensures unconditional stability across 0–10µF.
What is the purpose of Pin 3 on LM4040BIX3-3.0?
Pin 3 on LM4040BIX3-3.0 is designated N.C. (No Connection) and must either be left floating or connected directly to Pin 2 (cathode). This configuration minimizes thermal gradients across the die and prevents parasitic leakage paths that could degrade long-term stability or tempco performance.
How does LM4040BIX3-3.0 achieve ±0.2% initial accuracy?
LM4040BIX3-3.0 achieves ±0.2% initial accuracy through post-package laser trimming of on-chip thin-film resistors during final test. This process adjusts the bandgap core's output voltage to fall within the 2.994V–3.006V window at +25°C, with statistical binning ensuring grade-B compliance before shipment.
Is LM4040BIX3-3.0 suitable for automotive under-hood applications?
No, LM4040BIX3-3.0 is rated for –40°C to +85°C operation and is intended for cabin or body-control modules-not under-hood environments exceeding +85°C. For under-hood use, consider automotive-qualified alternatives like MAX6008BAUT30+T (–40°C to +125°C, AEC-Q100 Grade 2).
LM4040BIX3-3.0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- SC-70, SOT-323
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 45µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 67 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
LM4040BIX3-3.0 FAQ
1.How can I place an order for LM4040BIX3-3.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040BIX3-3.0 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 LM4040BIX3-3.0 reliable?
The price and inventory of LM4040BIX3-3.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040BIX3-3.0 is usually 5 days.
3.What payment methods are accepted for LM4040BIX3-3.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040BIX3-3.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040BIX3-3.0?
LM4040BIX3-3.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040BIX3-3.0 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 LM4040BIX3-3.0?
For technical support, including LM4040BIX3-3.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040BIX3-3.0 requirements.
6.How does Aetrix verify that LM4040BIX3-3.0 is sourced from the original manufacturer or authorized distributors?
All LM4040BIX3-3.0 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 LM4040BIX3-3.0 meets industry standards.
7.What is the process for return or replacement of LM4040BIX3-3.0?
All LM4040BIX3-3.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040BIX3-3.0, 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 LM4040BIX3-3.0 part is unused and in its original packaging.
Return procedure for LM4040BIX3-3.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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