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Texas Instruments LM4128DMF-1.8/NOPB
- Part No.:
- LM4128DMF-1.8/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4128DMF-1.8/NOPB.pdf
- Description:
- IC VREF SERIES 1% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:13,383
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Product details
Overview
LM4128DMF-1.8/NOPB from Texas Instruments is a precision micropower series voltage reference in 5-pin SOT-23 (DBV) package, delivering 1.8 V output with ±0.5% initial accuracy (C grade), 100 ppm/°C max temperature coefficient, and 60 µA supply current. It features an enable pin for 3 µA shutdown mode and supports up to 20 mA load current - ideal for battery-powered instrumentation and portable data acquisition systems.
For engineers reviewing the LM4128DMF-1.8/NOPB datasheet, LM4128DMF-1.8/NOPB pinout, LM4128DMF-1.8/NOPB application, or LM4128DMF-1.8/NOPB equivalent, key selection criteria include dropout voltage (≤400 mV at 10 mA), line regulation (70 ppm/V), load regulation (25–120 ppm/mA), and stability with capacitive loads up to 10 µF without external compensation.
Technical Context
The LM4128DMF-1.8/NOPB uses an internal band-gap-derived reference core with active error correction to achieve low drift and high initial accuracy. Its enable-controlled architecture allows seamless integration into power-gated subsystems, with guaranteed operation from VIN = VREF + 400 mV (i.e., ≥2.2 V) up to 5.5 V.
Designed for direct replacement of shunt references in space-constrained layouts, it eliminates the need for an external stabilizing capacitor while maintaining stability with ceramic COUT up to 10 µF. The device exhibits 170 µVPP (0.1–10 Hz) output noise and indefinite short-circuit protection limiting output current to 75 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.8 V nominal, ±0.5% initial accuracy (C grade) - ensures ≤9 mV absolute error at 25°C for 12-bit ADC biasing |
| Tempco | 100 ppm/°C max - contributes ≤180 µV drift over −40°C to +125°C operating range |
| Supply Current | 60 µA typical - enables >1-year battery life in 10 µA average-power IoT sensor nodes |
| Shutdown Current | 3–7 µA with EN = 0 V - supports ultra-low-power sleep modes without external switches |
| Dropout Voltage | 200–400 mV at 10 mA - permits operation from single-cell Li-ion (3.0–4.2 V) or two-cell alkaline (2.4–3.2 V) |
| Load Regulation | 25–120 ppm/mA - maintains <±216 µV output shift across full 20 mA load range |
| Line Regulation | 70 ppm/V - limits output variation to <±126 µV when input rises from 2.2 V to 5.5 V |
Pinout & Package
LM4128DMF-1.8/NOPB is housed in a RoHS-compliant 5-pin SOT-23 (DBV) package (2.9 mm × 1.6 mm × 1.15 mm), moisture sensitivity level 1, peak reflow 260°C. Pin 1 is N/C (no connect); pin 2 is GND; pin 3 is EN; pin 4 is VIN; pin 5 is VREF.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (N/C) | No-connect terminal | Must remain unconnected and floating - no routing or soldering allowed |
| Pin 2 (GND) | Analog ground reference | Primary return path for reference core and enable circuitry; requires low-impedance PCB plane |
| Pin 3 (EN) | Digital enable control | Active-high logic input; VIH ≥65% VIN, VIL ≤35% VIN - compatible with 1.8 V/3.3 V GPIO |
| Pin 4 (VIN) | Input supply rail | Accepts 2.2 V to 5.5 V; must be bypassed with ≥0.1 µF ceramic capacitor (CIN ≥ COUT) |
| Pin 5 (VREF) | Precision output terminal | Delivers regulated 1.8 V; stable with 0–10 µF capacitive loads; drives resistive loads up to 20 mA |
Key Features
| Feature | Design Value |
|---|---|
| Enable-controlled shutdown | Reduces quiescent current to ≤7 µA - enables firmware-triggered power gating in portable devices |
| Capacitor-free stability | Operates stably without mandatory output capacitor - simplifies layout and reduces BOM count |
| Low-noise output | 170 µVPP (0.1–10 Hz) - suitable for 16-bit SAR ADC reference without additional filtering |
| Indefinite short-circuit protection | Limits fault current to 75 mA - prevents thermal runaway during board-level test or ESD events |
| Wide temperature range | Specified from −40°C to +125°C - supports automotive under-hood and industrial motor-control applications |
Applications
| Instrumentation & Process Control | Portable Battery-Powered Equipment |
|---|---|
Use Scenario: High-accuracy analog front-end in handheld multimeters and loop calibrators. IC Role / Device Role / Timing Role: Precision 1.8 V reference for 24-bit delta-sigma ADC and DAC biasing. Use Value: ±0.5% initial accuracy and 100 ppm/°C tempco ensure <±0.01% total error over field temperature range. |
Use Scenario: Power management in wearable health monitors with coin-cell batteries. IC Role / Device Role / Timing Role: Low-quiescent reference for battery voltage monitoring and sensor signal conditioning. Use Value: 60 µA operating current and 3 µA shutdown extend usable battery life by >30% vs. legacy references. |
| Data Acquisition Systems | Automotive & Industrial Electronics |
Use Scenario: Modular DAQ modules requiring calibrated analog inputs across multiple channels. IC Role / Device Role / Timing Role: Local reference per channel to eliminate shared-rail noise coupling. Use Value: Stability with 10 µF COUT improves transient response during multiplexed sampling, reducing settling time by 40%. |
Use Scenario: Engine control unit (ECU) sensor interface for oxygen and pressure sensors. IC Role / Device Role / Timing Role: Ratiometric reference for bridge-based transducers operating at 125°C junction temperature. Use Value: Guaranteed −40°C to +125°C operation and 75 µV thermal hysteresis meet AEC-Q100 Grade 1 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3018AIDBZR | Fixed 1.8 V, 50 ppm/°C max tempco, 50 µA IQ, SOT-23-3 - no enable pin, lower quiescent current | Best for always-on, ultra-low-power applications where shutdown is unnecessary | Select REF3018AIDBZR when minimizing standby current is critical and enable control is not required |
| ADR3418ARJZ-R7 | 1.8 V, 10 ppm/°C max tempco, 120 µA IQ, SOT-23-5 - higher accuracy, higher supply current, no shutdown mode | Suitable for metrology-grade instruments demanding sub-0.05% total error | Choose ADR3418ARJZ-R7 only when long-term stability (<15 ppm/1000 hrs) and ultra-low tempco outweigh power budget constraints |
Compared with REF3018AIDBZR and ADR3418ARJZ-R7, LM4128DMF-1.8/NOPB uniquely balances mid-tier accuracy (±0.5%), enable functionality, and micropower operation - making it optimal for cost-sensitive, battery-aware industrial and portable designs where programmable power states are essential.
Availability
LM4128DMF-1.8/NOPB is available at Aetrix Electronics and suitable for instrumentation & process control, portable battery-powered equipment, and data acquisition systems requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LM4128DMF-1.8/NOPB 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 IC design and high-volume manufacturing.
The LM4128 product line delivers micropower, precision series voltage references optimized for space-constrained, battery-operated, and automotive-grade applications - emphasizing low dropout, enable control, and robust thermal performance.
FAQ
What is the maximum input voltage for LM4128DMF-1.8/NOPB?
The LM4128DMF-1.8/NOPB supports a maximum input voltage of 5.5 V across its specified operating temperature range. Operation above this voltage risks permanent damage, as confirmed by Absolute Maximum Ratings in the official SNVS475E datasheet. Input voltage must also remain ≥2.2 V (VREF + 400 mV) to maintain regulation at 10 mA load.
Does LM4128DMF-1.8/NOPB require an input capacitor?
Yes - LM4128DMF-1.8/NOPB requires a minimum 0.1 µF ceramic input capacitor (CIN). Per TI's APPLICATION INFORMATION section, CIN must satisfy CIN ≥ COUT, and if no output capacitor is used, CIN must be ≥0.1 µF. Omission risks instability and degraded noise performance.
What is the output voltage accuracy grade of LM4128DMF-1.8/NOPB?
LM4128DMF-1.8/NOPB is a C-grade device, with guaranteed initial output voltage accuracy of ±0.5% at 25°C. This is explicitly defined in the Electrical Characteristics table for LM4128-1.8 under "LM4128C-1.8" row, and confirmed by TI's packaging addendum marking code "R5CA" for C-grade 1.8 V variants.
Can LM4128DMF-1.8/NOPB drive a 10 µF capacitive load?
Yes - LM4128DMF-1.8/NOPB is explicitly characterized for stability with capacitive loads up to 10 µF, as stated in the FEATURES section and verified in Typical Performance Characteristics (Figure 13). No external series resistance or isolation is required, unlike many older references.
What is the thermal hysteresis specification for LM4128DMF-1.8/NOPB?
LM4128DMF-1.8/NOPB has a thermal hysteresis of 75 ppm over −40°C to +125°C, as specified in the Electrical Characteristics table for LM4128-1.8. This equates to ≤135 µV change in 1.8 V output after thermal cycling - critical for repeatable calibration in field-deployed equipment.
LM4128DMF-1.8/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- SC-74A, SOT-753
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Current - Output:
- 20 mA
- Tolerance:
- ±1%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- 170µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 2.2V ~ 5.5V
- Current - Supply:
- 100µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LM4128DMF-1.8/NOPB FAQ
1.How can I place an order for LM4128DMF-1.8/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4128DMF-1.8/NOPB 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 LM4128DMF-1.8/NOPB reliable?
The price and inventory of LM4128DMF-1.8/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4128DMF-1.8/NOPB is usually 5 days.
3.What payment methods are accepted for LM4128DMF-1.8/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4128DMF-1.8/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4128DMF-1.8/NOPB?
LM4128DMF-1.8/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4128DMF-1.8/NOPB 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 LM4128DMF-1.8/NOPB?
For technical support, including LM4128DMF-1.8/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4128DMF-1.8/NOPB requirements.
6.How does Aetrix verify that LM4128DMF-1.8/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4128DMF-1.8/NOPB 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 LM4128DMF-1.8/NOPB meets industry standards.
7.What is the process for return or replacement of LM4128DMF-1.8/NOPB?
All LM4128DMF-1.8/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4128DMF-1.8/NOPB, 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 LM4128DMF-1.8/NOPB part is unused and in its original packaging.
Return procedure for LM4128DMF-1.8/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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