My Inquiry
My Account
Texas Instruments LM4128DMF-4.1/NOPB
- Part No.:
- LM4128DMF-4.1/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4128DMF-4.1/NOPB.pdf
- Description:
- IC VREF SERIES 1% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,375
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM4128DMF-4.1/NOPB from Texas Instruments is a precision micropower series voltage reference in 5-pin SOT-23 (DBV) package, delivering 4.096 V output with ±0.2% initial accuracy (Grade B), 75 ppm/°C temperature coefficient, and 60 µA supply current. It supports 20 mA output current, features an enable pin for 3 µA shutdown mode, and operates from −40°C to +125°C - ideal for high-resolution ADC/DAC biasing in portable instrumentation.
For engineers reviewing the LM4128DMF-4.1/NOPB datasheet, LM4128DMF-4.1/NOPB pinout, LM4128DMF-4.1/NOPB application, or LM4128DMF-4.1/NOPB equivalent, key selection criteria include dropout voltage (≤400 mV at 10 mA), load regulation (≤120 ppm/mA), 0.1–10 Hz noise (350 µVPP), and stability with up to 10 µF capacitive loads without external compensation.
Technical Context
The LM4128DMF-4.1/NOPB uses a band-gap-derived reference core optimized for low quiescent current and minimal thermal drift. Its enable input controls internal biasing via a 2 µA pull-up, allowing clean transition between 60 µA active and 3–7 µA shutdown states without output oscillation.
It achieves stability with capacitive loads up to 10 µF while requiring only a minimum 0.1 µF input capacitor (CIN ≥ COUT). The device maintains 0.5% output accuracy down to VIN = VREF + 400 mV and delivers 75 mA short-circuit current limiting with indefinite fault tolerance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096 V nominal; enables precise 12-bit DAC/ADC full-scale calibration without scaling resistors |
| Initial Accuracy | ±0.2% (Grade B); ensures ≤8.2 mV absolute error at 25°C for factory-trimmed systems |
| Tempco | 75 ppm/°C max; contributes ≤0.38 mV drift over −40°C to +125°C ambient range |
| Supply Current | 60 µA typical; supports >1-year battery life in 10 µA-average-power sensor nodes |
| Dropout Voltage | 400 mV max at 10 mA; allows operation from 4.5 V supply with 4.096 V rail in low-voltage systems |
| Output Noise | 350 µVPP (0.1–10 Hz); limits RMS quantization uncertainty to <0.05 LSB in 16-bit 4.096 V-range converters |
| Enable Threshold | VIL ≤35% VIN, VIH ≥65% VIN; compatible with standard CMOS logic driving from same supply rail |
Pinout & Package
LM4128DMF-4.1/NOPB is housed in a 5-pin SOT-23 (DBV) package - RoHS-compliant, moisture sensitivity level 1, rated for −40°C to +125°C junction temperature. Pin 1 is N/C (no connect), pin 2 is GND, pin 3 is EN, pin 4 is VIN, and pin 5 is VREF. The package measures 2.9 mm × 1.6 mm × 1.15 mm with 0.95 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (N/C) | No-connect terminal | Must remain unconnected and floating; no PCB trace or pad required |
| Pin 2 (GND) | Analog ground reference | Low-impedance return path for reference core and output stage; requires dedicated ground plane tie |
| Pin 3 (EN) | Digital enable control | Active-high logic input; pulls up internally to ~2 µA; drives into 3 µA shutdown when pulled ≤35% VIN |
| Pin 4 (VIN) | Input supply rail | Accepts 4.496 V to 5.5 V (VREF + 400 mV min); supplies both reference core and output buffer |
| Pin 5 (VREF) | Precision output terminal | Delivers regulated 4.096 V; stable with 0–10 µF capacitive loads; requires local 0.1 µF ceramic bypass if COUT = 0 |
Key Features
| Feature | Design Value |
|---|---|
| Enable-controlled shutdown | Reduces supply current to 3–7 µA, enabling power-gating in duty-cycled data acquisition systems |
| No external stabilization capacitor | Eliminates need for output compensation network, reducing BOM count and PCB area in space-constrained designs |
| Stable with 10 µF capacitive loads | Supports direct connection to large bulk capacitance for improved load transient response in precision regulators |
| Indefinite short-circuit protection | Limits output current to 75 mA during fault conditions without latch-up or degradation, enhancing system robustness |
| Low ESR ceramic capacitor compatibility | Enables use of X5R/X7R MLCCs for input/output filtering, minimizing board-level noise coupling in mixed-signal layouts |
Applications
| Portable Data Loggers | Industrial Sensor Transmitters |
|---|---|
Use Scenario: Battery-powered environmental monitoring node sampling temperature, humidity, and pressure at 1 Hz using 16-bit SAR ADC. IC Role / Device Role / Timing Role: Provides stable 4.096 V reference for ADC VREF pin and DAC bias in analog front-end. Use Value: Enables ±0.003% full-scale measurement accuracy over temperature and battery discharge (3.0–4.2 V), extending field calibration interval to 2 years. |
Use Scenario: 4–20 mA loop-powered transmitter with HART modulation, operating in hazardous industrial zones. IC Role / Device Role / Timing Role: Supplies precision reference for current-loop DAC and sensor signal conditioning amplifier. Use Value: Maintains <±0.1% loop accuracy across −40°C to +85°C ambient, meeting IEC 61000-6-2 immunity requirements without derating. |
| Medical Patient Monitors | Automotive Battery Management ICs |
Use Scenario: Portable ECG module digitizing biopotential signals with 24-bit delta-sigma ADC. IC Role / Device Role / Timing Role: Generates low-noise 4.096 V reference for ADC and programmable gain amplifier offset trimming. Use Value: Limits 0.1–10 Hz noise contribution to <0.15 µVRMS, preserving >110 dB SNR in clinical-grade signal chain. |
Use Scenario: Automotive BMS cell voltage monitor IC measuring 12S Li-ion stack with integrated 16-bit ADC. IC Role / Device Role / Timing Role: Supplies reference for on-die ADC and voltage supervisor comparators. Use Value: Ensures ±1.5 mV absolute cell voltage measurement accuracy over vehicle lifetime, supporting ASIL-B functional safety compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3040AIDBZR | 4.096 V, ±0.2% initial accuracy, 50 ppm/°C tempco, 50 µA IQ, SOT-23-5 | Lower tempco and noise (25 µVPP), but no enable pin; requires external logic for shutdown | Preferred where ultra-low drift dominates over power-gating capability |
| ADR3440ARJZ-R7 | 4.096 V, ±0.1% initial accuracy, 10 ppm/°C tempco, 120 µA IQ, SOT-23-5 | Higher precision and lower drift, but 2× higher supply current and no enable function | Selected when long-term stability (<15 ppm/1000 hrs) and minimal thermal hysteresis are critical |
Compared with REF3040AIDBZR and ADR3440ARJZ-R7, LM4128DMF-4.1/NOPB uniquely balances micropower operation (60 µA), integrated enable control, and robust capacitive-load stability - making it optimal for battery-cycled, space-constrained, and fault-tolerant embedded systems where moderate drift is acceptable.
Availability
LM4128DMF-4.1/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor transmitters, medical patient monitors, and automotive battery management systems requiring stable component supply with guaranteed long-term sourcing.
Supply support for LM4128DMF-4.1/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 and embedded processing technologies, with decades of expertise in precision analog IC design and high-reliability manufacturing.
LM4128DMF-4.1/NOPB belongs to TI's precision micropower voltage reference product line, engineered for high-accuracy, low-power, and thermally stable operation in space-constrained and battery-operated measurement systems.
FAQ
What is the maximum load current supported by LM4128DMF-4.1/NOPB?
The LM4128DMF-4.1/NOPB supports up to 20 mA output current while maintaining specified accuracy and regulation. At 20 mA load, dropout remains within 400 mV, and load regulation is bounded at 120 ppm/mA - ensuring predictable performance in precision regulator and DAC reference applications. Exceeding 20 mA may trigger current limiting or degrade output stability.
Does LM4128DMF-4.1/NOPB require an external output capacitor?
No, LM4128DMF-4.1/NOPB is designed to operate stably without an external output capacitor. However, adding a 1–10 µF ceramic capacitor (COUT) improves load transient response and reduces output noise. When used, CIN must be ≥ COUT; if COUT = 0, a minimum 0.1 µF CIN is mandatory per TI's application guidance.
What is the shutdown current of LM4128DMF-4.1/NOPB?
When the EN pin is pulled low (≤35% of VIN), LM4128DMF-4.1/NOPB enters shutdown mode with supply current reduced to 3–7 µA. This low-quiescent state preserves battery energy in intermittent-sampling systems. The device resumes full operation within microseconds after EN rises above 65% VIN, with typical turn-on time of 33.2 µs into 1 µF load.
Can LM4128DMF-4.1/NOPB drive a 10 µF capacitive load?
Yes, LM4128DMF-4.1/NOPB is explicitly characterized and guaranteed stable with capacitive loads up to 10 µF - a key differentiator versus many competing references. This eliminates need for isolation resistors or damping networks, simplifying layout and improving transient response in high-capacitance filter or regulation stages.
What grade (A/B/C/D) does LM4128DMF-4.1/NOPB correspond to?
LM4128DMF-4.1/NOPB is a Grade B device: it guarantees ±0.2% initial output voltage accuracy and 75 ppm/°C maximum temperature coefficient over −40°C to +125°C. The "D" in the part number denotes the grade - consistent with TI's LM4128 family nomenclature where D = Grade B for 4.096 V variants per official packaging and datasheet documentation.
LM4128DMF-4.1/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):
- 4.096V
- Voltage - Output (Max):
- -
- Current - Output:
- 20 mA
- Tolerance:
- ±1%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- 350µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 4.496V ~ 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-4.1/NOPB FAQ
1.How can I place an order for LM4128DMF-4.1/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4128DMF-4.1/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-4.1/NOPB reliable?
The price and inventory of LM4128DMF-4.1/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-4.1/NOPB is usually 5 days.
3.What payment methods are accepted for LM4128DMF-4.1/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4128DMF-4.1/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4128DMF-4.1/NOPB?
LM4128DMF-4.1/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4128DMF-4.1/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-4.1/NOPB?
For technical support, including LM4128DMF-4.1/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4128DMF-4.1/NOPB requirements.
6.How does Aetrix verify that LM4128DMF-4.1/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4128DMF-4.1/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-4.1/NOPB meets industry standards.
7.What is the process for return or replacement of LM4128DMF-4.1/NOPB?
All LM4128DMF-4.1/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4128DMF-4.1/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-4.1/NOPB part is unused and in its original packaging.
Return procedure for LM4128DMF-4.1/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4128DMF-4.1/NOPB 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…
