My Inquiry
My Account
Texas Instruments LM4041DIDCKR
- Part No.:
- LM4041DIDCKR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LM4041DIDCKR.pdf
- Description:
- IC VREF SHUNT ADJ 1% SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,239
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM4041DIDCKR from Texas Instruments is a precision micropower shunt voltage reference in SC-70-5 package, delivering a fixed 1.225 V output with ±1.0% initial tolerance (D grade) and 150 ppm/°C max temperature coefficient. It operates from 45 μA to 12 mA cathode current, exhibits 20 μVRMS wideband noise, and remains stable with any capacitive load-no output capacitor required. It supports industrial temperature range (–40°C to +85°C) and is used in high-accuracy data acquisition front-ends.
For engineers reviewing the LM4041DIDCKR datasheet, LM4041DIDCKR pinout, LM4041DIDCKR application, or LM4041DIDCKR equivalent, key selection criteria include its D-grade tolerance and thermal stability in space-constrained, low-power analog signal chains where reference drift and noise directly impact ADC accuracy and sensor calibration integrity.
Technical Context
The LM4041DIDCKR implements a Zener-based shunt reference architecture trimmed via Zener-zap during wafer sort to achieve its ±1.0% output tolerance. Its feedback (FB) pin enables adjustable configurations, but this specific variant (DIDCKR) is fixed-output and uses the SC-70-5 package with dedicated NC pins and defined anode/cathode/FB terminal mapping.
It maintains low dynamic impedance (<2 Ω at 1 mA) and low long-term drift (120 ppm over 1000 h), enabling stable biasing for precision op-amps and SAR ADC references. The device's no-capacitor-required stability stems from internal compensation optimized for all capacitive loads, eliminating external BOM components in portable instrumentation designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225 V nominal fixed output; sets precise bias point for ADCs, DACs, and sensor signal conditioning circuits. |
| Initial Tolerance | ±1.0% max at 25°C (D grade); defines worst-case DC error budget before temperature and aging effects. |
| Temp Coefficient | 150 ppm/°C max over –40°C to +85°C; limits reference drift to ±0.125 mV/°C across full industrial range. |
| Operating Current | 45 μA min to 12 mA max cathode current; supports ultra-low-power battery operation and high-current precision regulation. |
| Output Noise | 20 μVRMS (10 Hz–10 kHz); contributes <0.017% RMS noise to 12-bit ADC full-scale, preserving ENOB. |
| Dynamic Impedance | ≤2 Ω at 1 mA (120 Hz); ensures minimal output voltage shift under varying load or supply ripple conditions. |
| Long-Term Drift | 120 ppm over 1000 h; predicts <0.12% output change after one year of continuous operation at 25°C. |
Pinout & Package
LM4041DIDCKR is packaged in a 5-pin SC-70 (DCK) outline, measuring 2.0 mm × 2.1 mm × 0.9 mm, with moisture sensitivity level (MSL) 1 and lead finish NiPdAu (post-plated Ag spot). Pin 1 is FB (feedback), Pin 2 is NC (no connect), Pin 3 is Cathode, Pin 4 is NC, Pin 5 is Anode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (FB) | Feedback input | Used only in adjustable versions; must be left floating or tied to anode in fixed-output LM4041DIDCKR to prevent malfunction. |
| Pin 2 (NC) | No connect | Internally unconnected; must remain unconnected on PCB to avoid parasitic coupling or ESD path disruption. |
| Pin 3 (Cathode) | Shunt current sink / output node | Carries total cathode current (IZ + IL); connects to regulated output rail and external series resistor (RS). |
| Pin 4 (NC) | No connect | Internally unconnected; PCB trace must not route to this pad to maintain specified ESD and thermal performance. |
| Pin 5 (Anode) | Reference ground reference | Typically connected to system ground; serves as return path for cathode current and establishes reference potential. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 1.225 V output | Eliminates external resistor divider, reducing component count and layout area in compact sensor nodes. |
| Stable with all capacitive loads | Removes need for output bypass capacitor-critical for minimizing board space and cost in portable medical devices. |
| 45 μA minimum operating current | Enables operation from microcontroller GPIOs or low-quiescent LDOs in energy-harvesting systems. |
| 150 ppm/°C tempco (D grade) | Provides predictable, bounded drift for factory-calibrated instruments operating across ambient temperature swings. |
| SC-70-5 package | Offers 30% smaller footprint than SOT-23-3 while maintaining compatible reflow profiles and pick-and-place compatibility. |
Applications
| Data Acquisition Front-Ends | Portable Battery-Powered Sensors |
|---|---|
Use Scenario: High-resolution 16-bit SAR ADC sampling thermocouple or strain gauge signals in handheld test equipment. IC Role / Device Role / Timing Role: Provides stable 1.225 V reference voltage for ADC internal conversion core and external signal conditioning op-amps. Use Value: ±1.0% tolerance and 150 ppm/°C tempco limit total reference-induced error to <0.2% FS over temperature, preserving measurement repeatability. | Use Scenario: Low-power environmental sensor node logging temperature/humidity using coin-cell battery for >5 years. IC Role / Device Role / Timing Role: Supplies precision bias to analog front-end and ADC while drawing only 45 μA minimum current. Use Value: Micropower operation extends battery life; no output capacitor reduces BOM count and PCB area by 2 components per channel. |
| Industrial Process Monitoring | Precision Audio Level Detection |
Use Scenario: 4–20 mA loop-powered transmitter monitoring pressure or flow in factory automation systems. IC Role / Device Role / Timing Role: Generates accurate 1.225 V reference for current-sense amplifier and DAC that sets loop current. Use Value: Stable dynamic impedance (<2 Ω) prevents output sag during fast loop transients, ensuring compliance with IEC 61000-4-4 immunity requirements. | Use Scenario: Analog VU meter circuit in studio audio interface detecting RMS signal level with ±0.5 dB accuracy. IC Role / Device Role / Timing Role: Supplies low-noise 1.225 V reference to RMS-to-DC converter IC and comparator threshold network. Use Value: 20 μVRMS noise floor ensures reference does not dominate total system noise-critical for sub-millivolt-level audio envelope detection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431ACDBVR | 2.5 V fixed output; ±1% tolerance; 50 ppm/°C max tempco; requires external resistors for 1.225 V scaling. | Higher output voltage necessitates resistor divider, adding error sources and board area; better suited for 2.5–36 V regulation. | Select TL431ACDBVR only if 2.5 V reference suffices or if higher voltage headroom is needed for downstream circuitry. |
| REF3012AIDBZR | 1.2 V output; ±0.2% tolerance; 50 ppm/°C max tempco; series topology, not shunt; requires output capacitor. | Lower noise (12 μVRMS) and tighter tolerance-but demands 1 µF output cap and cannot sink load current like a shunt. | Choose REF3012AIDBZR when lowest possible drift and noise are critical and system allows series-reference constraints (e.g., no sinking capability needed). |
Compared with TL431ACDBVR and REF3012AIDBZR, LM4041DIDCKR uniquely combines fixed 1.225 V output, shunt topology (enabling current-sinking in regulator configurations), SC-70-5 footprint, and capacitor-free stability-making it optimal for space-limited, low-drift, low-noise shunt-bias applications where 1.225 V matches ADC or sensor interface requirements.
Availability
LM4041DIDCKR is available at Aetrix Electronics and suitable for data-acquisition systems, portable battery-powered sensors, and industrial process monitors requiring stable component supply with guaranteed long-term continuity and traceable sourcing.
Supply support for LM4041DIDCKR 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 LM4041 product line was developed to deliver cost-effective, micropower shunt references for portable and industrial instrumentation where size, power, and long-term stability are critical-targeting applications from handheld meters to factory-floor sensors.
FAQ
What is the output voltage and tolerance of LM4041DIDCKR?
The LM4041DIDCKR provides a fixed 1.225 V nominal output voltage with a maximum initial tolerance of ±1.0% at 25°C (D grade). This tolerance applies across the full industrial temperature range (–40°C to +85°C), and the device maintains this specification without requiring external trimming or calibration. The LM4041DIDCKR achieves this via Zener-zap wafer-level trimming during manufacturing.
Does LM4041DIDCKR require an output capacitor for stability?
No, LM4041DIDCKR does not require an output capacitor for stability. It is explicitly designed to remain stable with all capacitive loads-including zero capacitance-and TI confirms this in the datasheet. Adding a capacitor is optional and may be used for additional noise filtering, but it is never necessary for loop stability. This eliminates a common BOM item in space-constrained designs.
What is the minimum operating current for LM4041DIDCKR?
The LM4041DIDCKR has a typical minimum cathode current (IZ,min) of 45 μA at 25°C, with a maximum of 80 μA across the full –40°C to +85°C range. This ultra-low quiescent current enables use in energy-harvesting systems and battery-powered devices where standby power must be minimized. Operation below 45 μA may result in degraded regulation or increased output impedance.
How is the LM4041DIDCKR pinout configured in the SC-70-5 package?
In the SC-70-5 (DCK) package, LM4041DIDCKR pinout is: Pin 1 = FB (must float or tie to anode), Pin 2 = NC, Pin 3 = Cathode, Pin 4 = NC, Pin 5 = Anode. This differs from the SOT-23-3 version and must be verified against TI's official DBZ/DCK mechanical drawings. Pins 2 and 4 are internally unconnected and must remain un-routed on PCB.
Can LM4041DIDCKR be used in automotive applications?
LM4041DIDCKR is rated for industrial temperature range (–40°C to +85°C), not automotive (–40°C to +125°C). For automotive use, TI offers the LM4041Q variants (e.g., LM4041D12Q), which are AEC-Q100 qualified and characterized over –40°C to +125°C. Using LM4041DIDCKR outside its specified temperature range risks parametric shift and reliability degradation.
LM4041DIDCKR 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:
- Adjustable
- Voltage - Output (Min/Fixed):
- 1.233V
- Voltage - Output (Max):
- 10 V
- Current - Output:
- 12 mA
- Tolerance:
- ±1%
- Temperature Coefficient:
- 150ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 20µVrms
- 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
LM4041DIDCKR FAQ
1.How can I place an order for LM4041DIDCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041DIDCKR 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 LM4041DIDCKR reliable?
The price and inventory of LM4041DIDCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041DIDCKR is usually 5 days.
3.What payment methods are accepted for LM4041DIDCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041DIDCKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041DIDCKR?
LM4041DIDCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041DIDCKR 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 LM4041DIDCKR?
For technical support, including LM4041DIDCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041DIDCKR requirements.
6.How does Aetrix verify that LM4041DIDCKR is sourced from the original manufacturer or authorized distributors?
All LM4041DIDCKR 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 LM4041DIDCKR meets industry standards.
7.What is the process for return or replacement of LM4041DIDCKR?
All LM4041DIDCKR units undergo pre-shipment inspection (PSI). If there is an issue with LM4041DIDCKR, 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 LM4041DIDCKR part is unused and in its original packaging.
Return procedure for LM4041DIDCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4041DIDCKR 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…
