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Texas Instruments LM4128DQ1MF1.8/NOPB
- Part No.:
- LM4128DQ1MF1.8/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4128DQ1MF1.8/NOPB.pdf
- Description:
- IC VREF SERIES 1% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,890
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Product details
Overview
LM4128DQ1MF1.8/NOPB from Texas Instruments is a precision micropower series voltage reference in 5-pin SOT-23 (DBV) package, delivering 1.8 V output with ±1.0% initial accuracy, 100 ppm/°C temperature coefficient, and 60 µA supply current. It features an enable pin for 3 µA shutdown mode, supports up to 20 mA load, and operates from −40°C to +125°C - ideal for battery-powered instrumentation and automotive sensor signal conditioning.
For engineers reviewing the LM4128DQ1MF1.8/NOPB datasheet, LM4128DQ1MF1.8/NOPB pinout, LM4128DQ1MF1.8/NOPB application, or LM4128DQ1MF1.8/NOPB equivalent, key selection criteria include dropout voltage (≤400 mV at 10 mA), stability with capacitive loads up to 10 µF, and AEC-Q100 Grade 1 qualification for automotive use.
Technical Context
The LM4128DQ1MF1.8/NOPB is a band-gap-based series voltage reference with internal enable logic and no external capacitor requirement for stability. Its architecture ensures monotonic turn-on behavior and indefinite short-circuit protection limiting output current to 75 mA.
It operates across VIN = VREF + 400 mV to 5.5 V, maintains 25–120 ppm/mA load regulation, and achieves 30–100 ppm/V line regulation depending on output voltage - all verified over −40°C to +125°C junction temperature range per AEC-Q100 Grade 1 requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.8 V nominal, ±1.0% initial accuracy (D-grade) - sets absolute ADC/DAC reference level with known worst-case error budget. |
| Temperature Coefficient | 100 ppm/°C max - contributes ≤180 µV drift over −40°C to +125°C, critical for high-resolution data acquisition. |
| Supply Current | 60 µA typical - enables multi-year operation from coin-cell batteries in portable medical or IoT sensors. |
| Shutdown Current | 3–7 µA with EN = 0 V - allows system-level power gating without external switches. |
| Dropout Voltage | 400 mV max at 10 mA - permits operation from 2.2 V supply, compatible with single Li-ion or dual alkaline rails. |
| Output Noise | 170 µVPP (0.1–10 Hz) - supports 16-bit+ resolution in low-frequency measurement systems. |
| Load Capability | 20 mA max - drives SAR ADC reference inputs, op-amp bias networks, or small DAC buffers directly. |
Pinout & Package
LM4128DQ1MF1.8/NOPB uses the 5-pin SOT-23 (DBV) package (Package Number DBV, R-PDSO-G5), with 1.6 mm × 2.9 mm footprint and 0.95 mm height. Pin 1 is N/C (no connect); pins are arranged top-view clockwise from mark dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (N/C) | No-connect terminal | Must remain unconnected and floating; not bonded internally - no routing or grounding allowed. |
| 2 (GND) | Analog ground reference | Primary return path for reference current; requires low-impedance connection to clean analog ground plane. |
| 3 (EN) | Digital enable input | Active-high control: VIH ≥65% VIN, VIL ≤35% VIN - compatible with 1.8 V/3.3 V logic without level shifters. |
| 4 (VIN) | Input supply rail | Accepts 2.2 V to 5.5 V; must be bypassed with ≥0.1 µF ceramic capacitor (CIN) placed adjacent to pin. |
| 5 (VREF) | Precision output terminal | Delivers regulated 1.8 V; stable with optional COUT up to 10 µF - improves transient response under dynamic loads. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualified | Validated for automotive applications operating from −40°C to +125°C ambient, with full traceability and process controls. |
| No external stabilization capacitor required | Internally compensated for stability with 0–10 µF capacitive loads - reduces BOM count and PCB area in space-constrained modules. |
| Low thermal hysteresis | 75 ppm max - minimizes repeatability error after thermal cycling, essential for calibration-critical test equipment. |
| Stable with low-ESR ceramics | Compatible with X5R/X7R MLCCs - eliminates need for tantalum or electrolytic capacitors and associated reliability concerns. |
| Indefinite short-circuit protection | Self-limits output to 75 mA during fault - prevents damage during board bring-up or connector misinsertion events. |
Applications
| Automotive Sensor Signal Conditioning | Portable Medical Instrumentation |
|---|---|
Use Scenario: Reference for bridge-sensor front-end amplifiers and 16-bit SAR ADCs in engine coolant temperature or pressure modules. IC Role / Device Role / Timing Role: Precision DC voltage reference establishing absolute measurement scale for analog signal chain. Use Value: 100 ppm/°C tempco and −40°C to +125°C operation ensure <±0.2% total error across vehicle lifetime without recalibration. |
Use Scenario: Reference for ECG/SpO₂ analog front-ends powered by CR2032 coin cell in handheld patient monitors. IC Role / Device Role / Timing Role: Low-power series reference enabling >5-year battery life while maintaining 16-bit ADC accuracy. Use Value: 60 µA quiescent current and 3 µA shutdown mode extend runtime beyond 2000 hours under intermittent sampling. |
| Industrial Data Acquisition Modules | Battery-Powered Test & Measurement |
Use Scenario: Reference for isolated 24-bit ΣΔ ADCs in programmable logic controller (PLC) analog input cards. IC Role / Device Role / Timing Role: Stable 1.8 V reference source for high-resolution digitization of 4–20 mA loop signals. Use Value: 170 µVPP (0.1–10 Hz) noise and 50 ppm long-term stability support 0.001% measurement repeatability over 1000 hrs. |
Use Scenario: Reference in handheld multimeters and portable oscilloscope probes requiring self-contained accuracy. IC Role / Device Role / Timing Role: Primary voltage standard for auto-ranging and calibration routines in field-deployable tools. Use Value: ±1.0% initial accuracy and 75 ppm thermal hysteresis allow factory calibration to hold within spec across environmental stress tests. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6126AUT18#TG16 | 1.8 V, ±0.06% initial accuracy, 3 ppm/°C tempco, 12 µA IQ - higher precision but no enable pin. | Used in metrology-grade instruments where ultra-low drift outweighs need for power gating. | Select when sub-10 ppm total error budget is required and shutdown functionality is unnecessary. |
| ADR3418ARJZ-R7 | 1.8 V, ±0.1% initial accuracy, 10 ppm/°C tempco, 120 µA IQ - includes trim capability, no enable. | Favored in industrial DAC reference designs needing post-assembly calibration via external resistor. | Choose when fine-tuning of output voltage is needed and higher supply current is acceptable. |
Compared with MAX6126AUT18#TG16 and ADR3418ARJZ-R7, LM4128DQ1MF1.8/NOPB uniquely combines AEC-Q100 qualification, integrated enable control, and micropower operation - making it the only option among the three suitable for automotive subsystems requiring both functional safety readiness and dynamic power management.
Availability
LM4128DQ1MF1.8/NOPB is available at Aetrix Electronics and suitable for automotive sensor modules, portable medical devices, and industrial data acquisition systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4128DQ1MF1.8/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 company specializing in analog and embedded processing technologies, with leadership in precision analog ICs and automotive-grade components.
LM4128DQ1MF1.8/NOPB belongs to TI's precision voltage reference product line, designed specifically for high-accuracy, low-power, and AEC-Q100-compliant applications in automotive, industrial, and portable measurement systems.
FAQ
What is the maximum input voltage for LM4128DQ1MF1.8/NOPB?
The LM4128DQ1MF1.8/NOPB supports a maximum input voltage of 5.5 V. Operation above this level risks permanent damage, as specified in Absolute Maximum Ratings. For reliable performance, VIN must also satisfy VIN ≥ VREF + 400 mV (i.e., ≥2.2 V) at 10 mA load - ensuring proper regulation and dropout margin. This range enables compatibility with common 3.3 V and 5 V supply rails.
Does LM4128DQ1MF1.8/NOPB require an input capacitor?
Yes, LM4128DQ1MF1.8/NOPB requires a minimum 0.1 µF ceramic input capacitor (CIN) connected between VIN and GND. The datasheet mandates CIN ≥ COUT when an output capacitor is used, and specifies X5R or X7R dielectrics for stability. Omitting CIN risks oscillation or degraded noise performance, especially under dynamic load conditions or with long PCB traces.
Is LM4128DQ1MF1.8/NOPB pin-compatible with other LM4128 variants?
Yes, LM4128DQ1MF1.8/NOPB shares identical 5-pin SOT-23 (DBV) pinout and package dimensions with all LM4128xMF-x/NOPB variants - including LM4128AMF-1.8/NOPB and LM4128DQ1MF2.5/NOPB. Pin functions (N/C, GND, EN, VIN, VREF) and mechanical layout are fully consistent across voltage options and grade suffixes, enabling drop-in replacement within the same output voltage family.
What does the 'Q' in LM4128DQ1MF1.8/NOPB signify?
The 'Q' in LM4128DQ1MF1.8/NOPB denotes AEC-Q100 qualification per Grade 1 requirements (−40°C to +125°C operation), and indicates manufacturing on TI's automotive-grade flow. The 'D' specifies the 1.0% initial accuracy grade, '1M' identifies the SOT-23 package variant, and 'F1.8' confirms the 1.8 V output. NOPB indicates lead-free (Pb-free) and RoHS-compliant finish.
Can LM4128DQ1MF1.8/NOPB drive a 10 µF output capacitor?
Yes, LM4128DQ1MF1.8/NOPB is explicitly characterized and guaranteed stable with capacitive loads up to 10 µF - a key differentiator from many competing references. Adding COUT improves load transient response and reduces output impedance at higher frequencies, though it increases turn-on time (e.g., ~78.8 µs for 10 µF vs. ~33.2 µs for 1 µF). No series resistance is required.
LM4128DQ1MF1.8/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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LM4128DQ1MF1.8/NOPB FAQ
1.How can I place an order for LM4128DQ1MF1.8/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4128DQ1MF1.8/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 LM4128DQ1MF1.8/NOPB reliable?
The price and inventory of LM4128DQ1MF1.8/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4128DQ1MF1.8/NOPB is usually 5 days.
3.What payment methods are accepted for LM4128DQ1MF1.8/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4128DQ1MF1.8/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4128DQ1MF1.8/NOPB?
LM4128DQ1MF1.8/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4128DQ1MF1.8/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 LM4128DQ1MF1.8/NOPB?
For technical support, including LM4128DQ1MF1.8/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4128DQ1MF1.8/NOPB requirements.
6.How does Aetrix verify that LM4128DQ1MF1.8/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4128DQ1MF1.8/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 LM4128DQ1MF1.8/NOPB meets industry standards.
7.What is the process for return or replacement of LM4128DQ1MF1.8/NOPB?
All LM4128DQ1MF1.8/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4128DQ1MF1.8/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 LM4128DQ1MF1.8/NOPB part is unused and in its original packaging.
Return procedure for LM4128DQ1MF1.8/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4128DQ1MF1.8/NOPB Tags
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