My Inquiry
My Account
Texas Instruments LM4132AMFX-1.8
- Part No.:
- LM4132AMFX-1.8
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4132AMFX-1.8.pdf
- Description:
- IC VREF SERIES 0.05% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,458
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM4132AMFX-1.8 from Texas Instruments is a precision low-dropout (LDO) series voltage reference IC delivering a stable 1.8 V output with ±0.05% initial accuracy, 10 ppm/°C temperature coefficient (0°C to 85°C), and 60 µA quiescent current. It features an enable pin for 3 µA shutdown mode, supports up to 20 mA load current, and operates from VIN = VREF + 400 mV to 5.5 V - ideal for high-accuracy ADC/DAC biasing in portable instrumentation.
For engineers reviewing the LM4132AMFX-1.8 datasheet, LM4132AMFX-1.8 pinout, LM4132AMFX-1.8 application, or LM4132AMFX-1.8 equivalent, key selection criteria include its SOT-23-5 package, automotive-grade AEC-Q100 qualification (Grade 1), dropout voltage of 230 mV at 10 mA, 170 µVPP (0.1–10 Hz) output noise, and compatibility with low-ESR ceramic capacitors without requiring an output buffer.
Technical Context
The LM4132AMFX-1.8 uses EEPROM-trimmed CMOS band-gap architecture to achieve laser-trimmed bipolar-level precision while overcoming assembly-induced voltage shift. Its curvature, tempco, and accuracy are corrected at package level - enabling consistent 1.8 V output across temperature and process variation.
This device operates as a series reference with active enable control, eliminating idle current waste typical of shunt references. Its 400 mV max dropout over –40°C to +125°C and no-output-capacitor operation simplify power rail design in space-constrained, battery-powered systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.8 V nominal, ±0.05% initial accuracy (A grade) - enables direct interface with 1.8 V logic and high-resolution SAR ADCs without gain calibration. |
| Tempco | 10 ppm/°C (0°C to 85°C), 20 ppm/°C (–40°C to 125°C) - ensures ≤±0.25 mV drift over full industrial range, critical for precision sensor signal chains. |
| Quiescent Current | 60 µA typical, ≤100 µA over temperature - supports >1-year battery life in always-on monitoring nodes drawing <100 µA system current. |
| Dropout Voltage | 230 mV at 10 mA load (typical), ≤400 mV over temperature - allows operation from single-cell Li-ion (3.0 V min) or 3.3 V rails with margin. |
| Enable Function | EN pin with VIH = 65% VIN, VIL = 35% VIN - permits direct microcontroller GPIO control without level-shifting; reduces supply current to 3 µA in shutdown. |
| Output Noise | 170 µVPP (0.1–10 Hz) - meets noise floor requirements for 16-bit+ data acquisition systems where reference noise dominates total error. |
| Load Drive | 20 mA max output current - eliminates need for external buffer when driving multiple op-amp references or ADC reference inputs. |
Pinout & Package
SOT-23-5 (DBV) package, 2.90 mm × 1.60 mm body size, with exposed pad not electrically connected. Pin 1 is marked by beveled corner or dot; pin numbering follows standard SOT-23 top-view convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - N/C | No-connect terminal | Internally unconnected; must remain floating - no PCB trace or thermal pad connection required. |
| 2 - GND | Analog ground reference | Primary return path for reference current and internal band-gap circuitry; requires low-impedance connection to clean analog ground plane. |
| 3 - EN | Digital enable input | Active-high control: drives internal pass element; VIH ≥ 65% VIN enables regulation, VIL ≤ 35% VIN forces 3 µA shutdown mode. |
| 4 - VIN | Input supply | Accepts 2.2 V to 5.5 V; minimum headroom is VREF + 400 mV - enables use with low-headroom regulators or partially discharged batteries. |
| 5 - VREF | Precision output | 1.8 V regulated output; capable of sourcing up to 20 mA; stable with ≥1 µF ceramic capacitor on VIN (CIN required), COUT optional. |
Key Features
| Feature | Design Value |
|---|---|
| EEPROM-based trimming | Corrects curvature, tempco, and initial accuracy at package level - eliminates post-assembly retest and improves yield vs laser-trimmed alternatives. |
| AEC-Q100 Grade 1 | Qualified for –40°C to +125°C ambient operation with HBM ESD ≥±2 kV - suitable for under-hood automotive sensors and industrial control modules. |
| No output capacitor needed | Stable with only input capacitor (CIN); removes risk of COUT ESR-induced oscillation and saves board space in compact designs. |
| Low-noise architecture | 170 µVPP (0.1–10 Hz) output noise - avoids additional filtering stages in high-dynamic-range measurement front-ends. |
| High PSRR | ≥60 dB rejection from 10 Hz to 100 kHz - suppresses ripple from switching regulators feeding VIN, preserving reference integrity. |
Applications
| Portable Data Loggers | Automotive Battery Monitoring Units |
|---|---|
|
Use Scenario: Continuous 16-bit voltage sampling of Li-ion cell stacks in handheld diagnostic tools with 10-year shelf-life requirement. IC Role / Device Role / Timing Role: Primary voltage reference for SAR ADC, providing stable 1.8 V reference independent of battery voltage decay. Use Value: 10 ppm/°C tempco and 170 µVPP noise ensure ≤0.01% measurement error across –20°C to +60°C operating range without recalibration. |
Use Scenario: Real-time cell voltage and temperature monitoring in 12 V automotive start-stop battery management systems. IC Role / Device Role / Timing Role: Precision reference for isolated ADC measuring individual 2.0–3.6 V cell voltages under engine cranking transients. Use Value: 400 mV max dropout and AEC-Q100 Grade 1 rating allow reliable operation during cold-crank events down to 6 V system voltage. |
| Medical Patient Vital Sign Monitors | Industrial Process Transmitters |
|
Use Scenario: Portable ECG/SpO₂ units requiring FDA-grade DC accuracy and low power consumption for multi-day clinical use. IC Role / Device Role / Timing Role: Reference source for instrumentation amplifier gain-setting and ADC conversion in analog front-end. Use Value: ±0.05% initial accuracy and 50 ppm long-term stability (1000 hrs) meet IEC 60601-2-27 linearity requirements without field recalibration. |
Use Scenario: 4–20 mA loop-powered pressure/temperature transmitters deployed in hazardous Zone 2 environments. IC Role / Device Role / Timing Role: Stable excitation reference for bridge sensors and precision scaling of analog output stage. Use Value: 20 mA drive capability powers both internal circuitry and external sensor bridges, eliminating need for discrete buffer amplifiers. |
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, no enable pin, SOT-23-3 package | Lacks shutdown mode and has higher tempco; limited to always-on, ultra-low-power roles where enable control is unnecessary | Select when board space is constrained (3-pin vs 5-pin) and system-level power sequencing handles sleep/wake independently |
| ADR3418ARJZ-R7 | 1.8 V, 10 ppm/°C max tempco, 120 µA IQ, no enable, TSOT-23-5 package with different pinout | Higher quiescent current and no enable function; requires external MOSFET for shutdown, increasing BOM count | Choose if long-term stability (30 ppm/1000 hrs) and tighter tempco spec over full range are prioritized over power savings |
Compared with REF3018AIDBZR and ADR3418ARJZ-R7, the LM4132AMFX-1.8 uniquely combines AEC-Q100 qualification, integrated enable control, and lowest noise in its class - making it optimal for automotive and portable medical designs demanding simultaneous precision, low power, and functional safety readiness.
Availability
LM4132AMFX-1.8 is available at Aetrix Electronics and suitable for portable instrumentation, automotive battery monitors, and medical vital sign loggers requiring stable component supply with guaranteed long-lifecycle support.
Supply support for LM4132AMFX-1.8 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 ICs and automotive-grade components.
The LM4132 family was designed to deliver laser-trimmed performance using cost-effective CMOS EEPROM trimming - targeting high-accuracy, low-power, and space-constrained applications in industrial, medical, and automotive markets.
FAQ
What is the maximum input voltage for the LM4132AMFX-1.8?
The LM4132AMFX-1.8 supports a maximum input voltage of 5.5 V across its specified operating temperature range. This limit is defined in Absolute Maximum Ratings and applies regardless of load or enable state. Exceeding 5.5 V risks permanent damage, even momentarily. The device operates down to VIN = VREF + 400 mV (i.e., ≥2.2 V), making it compatible with single-cell Li-ion and regulated 3.3 V supplies.
Does the LM4132AMFX-1.8 require an output capacitor (COUT) for stability?
No, the LM4132AMFX-1.8 is internally compensated and stable without an output capacitor. The datasheet explicitly states COUT is optional. A 1 µF ceramic capacitor on VIN (CIN) is mandatory for input bypassing, but adding COUT does not improve stability - though it may reduce high-frequency noise in specific layouts. This eliminates capacitor selection risk and saves PCB area in miniaturized designs.
What is the meaning of "A" in LM4132AMFX-1.8?
The "A" in LM4132AMFX-1.8 denotes the highest accuracy grade: ±0.05% initial output voltage tolerance at 25°C and 10 ppm/°C temperature coefficient over 0°C to 85°C. This grade is confirmed in Section 6.5 of the datasheet (Electrical Characteristics LM4132-1.8). The "MFX" suffix indicates tape-and-reel packaging in SOT-23-5 (DBV) format per TI's orderable addendum.
Can the LM4132AMFX-1.8 drive a 10 kΩ load directly?
Yes - the LM4132AMFX-1.8 can drive a 10 kΩ load (180 µA at 1.8 V) with negligible error. Its 20 mA output capability and 25 ppm/mA load regulation ensure <0.0025% output deviation under this condition. Even at full 20 mA (90 Ω load), voltage error remains within specification. No external buffer is needed for typical ADC reference, op-amp biasing, or sensor excitation loads.
Is the LM4132AMFX-1.8 qualified for automotive applications?
Yes, the LM4132AMFX-1.8 is AEC-Q100 qualified for Automotive Grade 1 (–40°C to +125°C ambient), with HBM ESD rating of ±2000 V. While the base LM4132 family includes non-automotive variants, the "A" grade part number LM4132AMFX-1.8 is explicitly covered under the LM4132-Q1 qualification scope per the datasheet's Feature and Device Information sections - making it suitable for engine control, ADAS sensors, and body electronics.
LM4132AMFX-1.8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- SC-74A, SOT-753
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Current - Output:
- 20 mA
- Tolerance:
- ±0.05%
- Temperature Coefficient:
- 20ppm/°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
LM4132AMFX-1.8 FAQ
1.How can I place an order for LM4132AMFX-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4132AMFX-1.8 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 LM4132AMFX-1.8 reliable?
The price and inventory of LM4132AMFX-1.8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4132AMFX-1.8 is usually 5 days.
3.What payment methods are accepted for LM4132AMFX-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4132AMFX-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4132AMFX-1.8?
LM4132AMFX-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4132AMFX-1.8 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 LM4132AMFX-1.8?
For technical support, including LM4132AMFX-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4132AMFX-1.8 requirements.
6.How does Aetrix verify that LM4132AMFX-1.8 is sourced from the original manufacturer or authorized distributors?
All LM4132AMFX-1.8 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 LM4132AMFX-1.8 meets industry standards.
7.What is the process for return or replacement of LM4132AMFX-1.8?
All LM4132AMFX-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with LM4132AMFX-1.8, 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 LM4132AMFX-1.8 part is unused and in its original packaging.
Return procedure for LM4132AMFX-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4132AMFX-1.8 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…
