LM4128CQ1MF3.3/NOPB Texas Instruments Integrated Circuit (SOT23 (5-Pin)) In Stock
LM4128CQ1MF3.3/NOPB is a precision micropower series voltage reference with a fixed 3.3 V output, input range of 2.2 V to 5.5 V, and three-terminal configuration in SOT-23-5 package. Designed for ADC and DAC reference applications in portable and battery-powered instrumentation.
- Manufacturer
- Texas Instruments
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Datasheet
- LM4128CQ1MF3.3/NOPB Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Fixed 3.3 V precision voltage reference output with low initial error
- Wide input voltage range of 2.2 V to 5.5 V for single-supply systems
- Micropower quiescent current enables long battery run times in portable instruments
- Three-terminal SOT-23-5 package minimizes PCB footprint for space-constrained designs
- Low temperature coefficient for stable reference across industrial temperature ranges
- RoHS-compliant lead-free construction meeting JESD-609 e3 requirements
Applications
LM4128CQ1MF3.3/NOPB is used as the reference voltage source for 3.3 V ADCs and DACs in portable data acquisition systems, handheld meters, and medical monitoring devices requiring a stable, low-power reference with minimal component count. It also serves as a precision bias source in sensor signal conditioning circuits where the reference must remain accurate across temperature without consuming significant quiescent current. The compact SOT-23-5 footprint makes it suitable for wearable electronics and IoT sensor nodes with tight PCB space constraints.
Specifications
| Pbfree Code | Yes |
| Reach Compliance Code | Compliant |
| YTEOL | 15 |
| Analog IC - Other Type | THREE TERMINAL VOLTAGE REFERENCE |
| Input Voltage-Max | 5.5V |
| Input Voltage-Min | 2.2V |
| JESD-30 Code | R-PDSO-G5 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Output Voltage-Max | 3.3165V |
| Output Voltage-Min | 3.2835V |
| Output Voltage-Nom | 3.3V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSOP5/6,.11,37 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, LOW PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Screening Level | AEC-Q100 |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 2.2V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | BIPOLAR |
| Temp Coef of Voltage-Max | 100ppm/°C |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.95mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Trim/Adjustable Output | NO |
| Voltage Tolerance-Max | 0.5% |
| Package | SOT23 (5-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What fixed output voltage does LM4128CQ1MF3.3/NOPB provide, and what is its input supply range?
LM4128CQ1MF3.3/NOPB provides a fixed 3.3 V precision reference output and accepts an input supply voltage from 2.2 V to 5.5 V. This allows it to be powered directly from a 3.6 V lithium cell, a 3.3 V regulated rail, or a standard 5 V supply while maintaining accurate 3.3 V output for ADC and DAC reference circuits.
How does the micropower design of LM4128CQ1MF3.3/NOPB benefit battery-powered applications?
LM4128CQ1MF3.3/NOPB consumes very low quiescent current in the micropower range of tens of microamps, which means it adds negligible drain to a battery pack even when powered on continuously. In a sensor node running from a 3 V coin cell delivering 220 mAh capacity, micropower operation extends operational lifetime from hours to months compared to standard precision references drawing milliamp-level bias currents.
Which converter or measurement circuit types benefit most from using LM4128CQ1MF3.3/NOPB as a reference?
LM4128CQ1MF3.3/NOPB provides maximum benefit to 12-bit or 16-bit SAR ADCs and sigma-delta converters that require a stable 3.3 V external reference to achieve their full resolution. The low initial voltage error and low temperature coefficient of the LM4128 series ensure that ADC full-scale voltage drift does not degrade measurement accuracy across the -40°C to +85°C industrial temperature range.
Can LM4128CQ1MF3.3/NOPB be used in 5 V systems, and how does the 2.2 V minimum input affect design flexibility?
Yes, LM4128CQ1MF3.3/NOPB operates with input voltages from 2.2 V to 5.5 V, making it directly compatible with both 5 V and 3.3 V system supplies. The 2.2 V minimum input voltage is below the 3.3 V output, but the device is a series type that requires VIN above VOUT to regulate; designers should ensure at least 200 mV to 400 mV headroom above the 3.3 V output for reliable regulation across load and temperature.
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Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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