My Inquiry
My Account
Texas Instruments LM236DE4-2-5
- Part No.:
- LM236DE4-2-5
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM236DE4-2-5.pdf
- Description:
- IC VREF SHUNT 2% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:794
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM236DE4-2-5 from Texas Instruments is a precision 2.5-V shunt voltage reference IC operating as a low-temperature-coefficient Zener diode with 0.27-Ω dynamic impedance, ±1% initial tolerance, and specified stability over −25°C to 85°C. It features a three-terminal architecture (anode, cathode, adjust) enabling precise temperature drift trimming and supports 400 µA to 10 mA operating current for use in digital voltmeters and 5-V-supply-referenced analog circuitry.
For engineers reviewing the LM236DE4-2-5 datasheet, LM236DE4-2-5 pinout, LM236DE4-2-5 application, or LM236DE4-2-5 equivalent, key selection criteria include temperature coefficient performance across industrial ambient ranges, trimmable reference accuracy, dynamic impedance under varying load currents, and SOIC-8 package compatibility with automated assembly.
Technical Context
The LM236DE4-2-5 implements an integrated bandgap-derived shunt regulator topology with internal trimming capability via the ADJ terminal, allowing minimization of temperature-induced voltage drift. Its 0.27-Ω dynamic impedance at 1 mA ensures stable output under fast load transients.
It operates exclusively in shunt mode - sinking current to maintain 2.5 V across its cathode-anode terminals - and functions identically as either a positive or negative voltage reference depending on circuit configuration. The device requires no external capacitors for stability and delivers low-noise operation with typical noise voltage of 250 nV/√Hz at 1 kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 2.49 V nominal at 1 mA; enables accurate 2.5-V biasing from 5-V logic rails without level-shifting circuitry. |
| Initial Tolerance | ±1% at 25°C; reduces calibration overhead in precision measurement systems. |
| Temp Stability | ±3.5 mV over −25°C to 85°C; supports unheated industrial environments without active compensation. |
| Dynamic Impedance | 0.27 Ω at 1 mA; maintains <1 mV output deviation during 1-mA load steps. |
| Operating Current | 400 µA to 10 mA; accommodates ultra-low-power sensor interfaces and high-current reference buffers. |
| Long-Term Drift | 20 ppm/khr; ensures reference integrity over multi-year deployment in metering equipment. |
| Noise Density | 250 nV/√Hz at 1 kHz; preserves signal-to-noise ratio in high-resolution ADC front-ends. |
Pinout & Package
LM236DE4-2-5 is housed in an 8-pin SOIC (D) package with 1.27-mm pitch, 3.91-mm body width, and 1.75-mm maximum height, compatible with standard surface-mount reflow profiles (MSL Level-1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 5, 6, 7 | No internal connection | Unused pins; must remain unconnected to avoid parasitic coupling or thermal stress. |
| 4 | Anode | Reference return node; connects to system ground or negative rail when used as positive reference. |
| 8 | Cathode | 2.5-V output node; sinks current to regulate voltage between cathode and anode. |
| ADJ (Pin 3) | Trim control | Allows external resistor network to nullify temperature coefficient; critical for <10 ppm/°C performance. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable temperature coefficient | Enables post-manufacture trimming to achieve <10 ppm/°C drift in final application layout. |
| Low dynamic impedance | 0.27 Ω sustains <1 mV regulation error during 10-mA transient loads, reducing need for bulk capacitance. |
| Wide operating current range | 400 µA–10 mA supports both battery-powered sensors and high-drive op-amp reference buffers. |
| Fast turn-on response | Stabilizes within 10 µs after power application, suitable for power-supply sequencing and wake-up circuits. |
| Bi-directional reference polarity | Configurable as positive or negative reference by reversing anode/cathode connections in circuit. |
Applications
| Digital Multimeter Reference | Industrial PLC Analog Input Module |
|---|---|
Use Scenario: High-accuracy DC voltage measurement using 24-bit sigma-delta ADC with auto-calibration routine. IC Role / Device Role / Timing Role: Primary 2.5-V reference source for ADC internal conversion core and external gain-setting resistors. Use Value: ±1% initial tolerance and 3.5-mV temp drift over −25°C to 85°C eliminate field recalibration in portable meters. | Use Scenario: Isolated 4–20 mA transmitter with microcontroller-based linearization and diagnostics. IC Role / Device Role / Timing Role: Stable excitation reference for RTD bridge and precision DAC output scaling. Use Value: 0.27-Ω dynamic impedance prevents gain error shift during rapid current-loop load changes. |
| Programmable Logic Controller Power Monitor | Automotive Body Control Module Sensor Bias |
Use Scenario: Real-time monitoring of 5-V system rail health using comparator-based window detection. IC Role / Device Role / Timing Role: Precision 2.5-V threshold generator referenced directly to 5-V supply rail. Use Value: Direct derivation from 5-V logic rail eliminates separate LDO, reducing BOM count and PCB area. | Use Scenario: Low-power NTC thermistor interface in under-hood temperature sensing node. IC Role / Device Role / Timing Role: Low-drift excitation source for ratiometric measurement against MCU's internal ADC reference. Use Value: 400 µA minimum operating current enables operation during sleep-mode wake pulses without startup delay. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM336BD-2-5 | 0°C to 70°C operating range; same SOIC-8 package and 2.49-V nominal output. | Limited to commercial-temperature applications; unsuitable for extended industrial environments. | Select when ambient stays within 0–70°C and cost sensitivity outweighs extended temp range. |
| TLVH431IDBVR | Adjustable 1.24–18 V output; 0.35-Ω dynamic impedance; SOT-23-5 package. | Requires external resistors for 2.5-V setting; higher noise (400 nV/√Hz); smaller footprint. | Choose for space-constrained designs where programmability justifies added component count and noise penalty. |
Compared with LM336BD-2-5, LM236DE4-2-5 extends usable temperature range by 105°C and improves long-term stability margin; versus TLVH431IDBVR, it offers lower noise, fixed 2.5-V output without external dividers, and superior thermal drift control via dedicated ADJ pin.
Availability
LM236DE4-2-5 is available at Aetrix Electronics and suitable for digital multimeters, industrial PLC analog input modules, and automotive body control module sensor bias circuits requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for LM236DE4-2-5 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and consumer markets.
The LM236 series belongs to TI's precision voltage reference product line, engineered specifically for applications demanding low-drift, trimmable shunt references in harsh thermal environments without external compensation circuitry.
FAQ
What is the operating temperature range of the LM236DE4-2-5?
The LM236DE4-2-5 is characterized for operation from −25°C to 85°C. This extended industrial temperature range distinguishes it from the LM336 variants (0°C to 70°C) and makes it suitable for unheated enclosures or under-hood automotive locations where ambient extremes occur. The device maintains ±3.5 mV total voltage variation across this full range when trimmed.
How does the ADJ pin on the LM236DE4-2-5 function in practice?
The ADJ pin on the LM236DE4-2-5 provides direct access to the internal bandgap node, enabling external resistor networks to nullify temperature-induced voltage drift. In practice, a potentiometer between ADJ and cathode allows fine-tuning to achieve <10 ppm/°C coefficient - critical for metrology-grade instruments. Pin 3 must not be left floating; unused configurations require grounding via ≥10 kΩ.
Can the LM236DE4-2-5 be used as a negative voltage reference?
Yes, the LM236DE4-2-5 can be configured as a negative voltage reference by connecting its anode to the system's positive rail and its cathode to the point requiring −2.5 V relative to ground. Because it operates as a shunt regulator, current flows from anode to cathode regardless of polarity orientation - enabling bidirectional reference use without additional components or topology changes.
What is the minimum operating current required for stable regulation in the LM236DE4-2-5?
The LM236DE4-2-5 requires a minimum operating current of 400 µA to maintain regulation within specification. Below this threshold, output voltage deviates significantly from 2.49 V due to insufficient internal biasing. For battery-powered applications, this defines the lowest sustainable load condition before reference collapse - design margins should maintain ≥500 µA under worst-case conditions.
Is the LM236DE4-2-5 RoHS compliant and what is its moisture sensitivity level?
Yes, the LM236DE4-2-5 is RoHS compliant with lead finish NIPDAU and carries an MSL rating of Level-1 (unlimited floor life at ≤30°C/60% RH). Its SOIC-8 package is qualified for peak reflow temperatures up to 260°C, supporting standard lead-free assembly processes without baking requirements or special handling protocols.
LM236DE4-2-5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.49V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±2%
- Temperature Coefficient:
- -
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 400 µA
- Operating Temperature:
- -25°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LM236DE4-2-5 FAQ
1.How can I place an order for LM236DE4-2-5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM236DE4-2-5 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 LM236DE4-2-5 reliable?
The price and inventory of LM236DE4-2-5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM236DE4-2-5 is usually 5 days.
3.What payment methods are accepted for LM236DE4-2-5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM236DE4-2-5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM236DE4-2-5?
LM236DE4-2-5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM236DE4-2-5 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 LM236DE4-2-5?
For technical support, including LM236DE4-2-5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM236DE4-2-5 requirements.
6.How does Aetrix verify that LM236DE4-2-5 is sourced from the original manufacturer or authorized distributors?
All LM236DE4-2-5 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 LM236DE4-2-5 meets industry standards.
7.What is the process for return or replacement of LM236DE4-2-5?
All LM236DE4-2-5 units undergo pre-shipment inspection (PSI). If there is an issue with LM236DE4-2-5, 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 LM236DE4-2-5 part is unused and in its original packaging.
Return procedure for LM236DE4-2-5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM236DE4-2-5 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…
