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Texas Instruments LM4132AMF-2.0
- Part No.:
- LM4132AMF-2.0
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4132AMF-2.0.pdf
- Description:
- IC VREF SERIES 0.05% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,238
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Product details
Overview
LM4132AMF-2.0 from Texas Instruments is a precision low-dropout (LDO) voltage reference IC delivering 2.048 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, 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 LM4132AMF-2.0 datasheet, LM4132AMF-2.0 pinout, LM4132AMF-2.0 application, or LM4132AMF-2.0 equivalent, key selection criteria include its SOT-23-5 package, automotive-grade AEC-Q100 qualification (Grade 1), dropout voltage of 175 mV at 10 mA, stability with low-ESR ceramic capacitors, and EEPROM-trimmed curvature compensation for superior long-term stability.
Technical Context
The LM4132AMF-2.0 implements a CMOS band-gap architecture with on-chip EEPROM registers for post-assembly correction of voltage accuracy, temperature coefficient, and curvature - overcoming plastic-package-induced shifts that limit laser-trimmed references. This enables A-grade performance (0.05%, 10 ppm/°C) in cost-effective packaging.
It operates as a series (not shunt) reference, eliminating idle current waste under no-load conditions. Its enable-controlled shutdown, 20-mA output drive capability, and absence of mandatory output capacitor requirements simplify design in space-constrained, battery-powered systems requiring stable 2.048 V reference points.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V nominal; exact value optimized for 12-bit (4096-step) and 16-bit (65536-step) DAC/ADC full-scale scaling. |
| Initial Accuracy | ±0.05% (A grade); ensures ≤1 LSB error in 16-bit systems at room temperature without calibration. |
| Tempco | 10 ppm/°C (0°C to 85°C); contributes <0.08% output drift over industrial range, critical for uncalibrated precision measurement. |
| Dropout Voltage | 175 mV at 10 mA load; allows operation from 2.223 V input - compatible with single-cell LiFePO₄ or boosted 1.8 V rails. |
| Quiescent Current | 60 µA active / 3 µA shutdown; enables multi-year battery life in always-on sensor nodes with periodic wake-up. |
| Load Drive | 20 mA max; directly drives ADC reference inputs, op-amp buffers, or small logic loads without external amplification. |
| Line Regulation | 30 ppm/V; maintains stability across input variations typical in DC-DC converter ripple or battery discharge profiles. |
Pinout & Package
SOT-23-5 (DBV) package: 2.90 mm × 1.60 mm body, 0.95 mm height, gull-wing leads. RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - N/C | No-connect terminal | Internally unconnected; must be left floating - not tied to GND or any potential. |
| 2 - GND | Ground reference | Primary return path for supply and load currents; requires low-impedance PCB connection to minimize noise coupling. |
| 3 - EN | Enable control input | Active-high logic: VIH ≥ 65% VIN enables output; VIL ≤ 35% VIN enters 3 µA shutdown - supports microcontroller GPIO control. |
| 4 - VIN | Input supply | Accepts 2.448 V to 5.5 V; minimum headroom is 400 mV above VREF - defines lowest usable input rail. |
| 5 - VREF | Precision output | 2.048 V reference source; capable of sourcing up to 20 mA; requires 1 µF low-ESR ceramic CIN at VIN for stability. |
Key Features
| Feature | Design Value |
|---|---|
| EEPROM-based trimming | Corrects assembly-induced voltage shift and tempco drift at package level - eliminates need for laser trimming or post-mount calibration. |
| Enable-controlled shutdown | Reduces supply current to 3 µA, enabling power-gating in duty-cycled systems without external FETs or complex sequencing. |
| Capacitor-stable operation | Stable with standard 1 µF X7R ceramic input capacitor; no output capacitor required - reduces BOM count and board area. |
| AEC-Q100 Grade 1 | Qualified for automotive ambient temperatures (–40°C to +125°C), supporting engine control, ADAS sensor modules, and infotainment reference circuits. |
| Low 0.1–10 Hz noise | 190 µVPP integrated noise - minimizes quantization uncertainty in high-resolution delta-sigma ADCs used in precision weigh scales and medical sensors. |
Applications
| Portable Data Loggers | Automotive Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Battery-powered environmental monitors logging temperature, humidity, and gas concentration over months using 16-bit SAR ADCs. IC Role / Device Role / Timing Role: Provides stable 2.048 V reference for ADC conversion, ensuring consistent full-scale definition across temperature and battery voltage decay. Use Value: Enables <1 LSB total unadjusted error without factory calibration, extending field deployment intervals and reducing maintenance costs. |
Use Scenario: Pressure and position sensors in brake-by-wire or throttle control modules requiring ISO 26262-compliant analog front-ends. IC Role / Device Role / Timing Role: Supplies precision bias to instrumentation amplifiers and ADCs in ASIL-B signal chains operating from 5 V vehicle bus with transient immunity. Use Value: AEC-Q100 Grade 1 qualification and 20 ppm/°C max tempco over –40°C to +125°C ensure functional safety compliance without derating. |
| Industrial PLC Analog Input Modules | Medical Patient Monitoring Devices |
|
Use Scenario: 4–20 mA loop-powered I/O modules converting field signals to digital values for DCS systems in harsh factory environments. IC Role / Device Role / Timing Role: Reference source for isolated ΣΔ ADCs measuring thermocouple, RTD, and strain gauge outputs with cold-junction compensation. Use Value: 10 ppm/°C tempco and 50 ppm long-term stability (1000 hrs) maintain calibration integrity between scheduled maintenance cycles. |
Use Scenario: Portable ECG and pulse oximetry units requiring ultra-low-noise, low-power analog signal chains for FDA-cleared diagnostics. IC Role / Device Role / Timing Role: Low-noise (190 µVPP) 2.048 V reference for 24-bit delta-sigma ADCs digitizing microvolt-level biopotentials. Use Value: Eliminates need for external noise-filtering RC networks or chopper-stabilized buffers - reducing component count and leakage paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3320AIDBVR | 2.048 V, ±0.1% initial accuracy, 10 ppm/°C, 3.8 µA IQ, SOT-23-5 - lower power but no enable pin or 20 mA drive. | Best for ultra-low-power sensor nodes where load current ≤ 5 mA and shutdown is managed externally. | Select REF3320AIDBVR when system-level shutdown is handled by PMIC or MCU power sequencing - not for direct EN-controlled reference gating. |
| ADR3420ARJZ-R7 | 2.048 V, ±0.1% accuracy, 10 ppm/°C, 60 µA IQ, SOT-23-5 - no enable pin, requires 1 µF COUT for stability, higher 0.1–10 Hz noise (35 µVPP). | Suitable for fixed-on applications like benchtop test equipment where continuous operation and minimal noise floor dominate. | Choose ADR3420ARJZ-R7 only if board layout accommodates mandatory output capacitor and EN functionality is unnecessary. |
Compared with REF3320AIDBVR and ADR3420ARJZ-R7, LM4132AMF-2.0 uniquely combines A-grade accuracy, integrated enable, 20 mA drive, and capacitor-free stability - making it optimal for dynamically powered, space-constrained, high-fidelity measurement systems.
Availability
LM4132AMF-2.0 is available at Aetrix Electronics and suitable for portable instrumentation, automotive sensor modules, and industrial PLC analog input designs requiring stable component supply, long-lifecycle support, and AEC-Q100-compliant performance.
Supply support for LM4132AMF-2.0 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 precision analog design heritage.
The LM4132 family was engineered to deliver laser-trimmed bipolar reference performance using programmable CMOS technology - targeting high-accuracy data acquisition, test equipment, and automotive sensing applications where size, cost, and reliability are critical.
FAQ
What is the output voltage tolerance of the LM4132AMF-2.0 over temperature?
The LM4132AMF-2.0 guarantees ±0.05% initial accuracy at 25°C. Over the full –40°C to +125°C range, its maximum temperature coefficient is 20 ppm/°C, resulting in ≤±0.2% total output variation - verified per AEC-Q100 Grade 1 testing. This includes thermal hysteresis of 75 ppm and long-term stability of 50 ppm over 1000 hours.
Can the LM4132AMF-2.0 operate from a 3.3 V supply?
Yes. The LM4132AMF-2.0 requires VIN ≥ VREF + 400 mV, so minimum input is 2.448 V. A 3.3 V supply is fully supported and provides 0.852 V headroom - well above the 175 mV dropout voltage at 10 mA. Operation at 3.3 V also improves PSRR and reduces thermal stress compared to 5 V.
Does the LM4132AMF-2.0 require an output capacitor for stability?
No. Unlike many voltage references, the LM4132AMF-2.0 is internally compensated and stable without an output capacitor. A 1 µF low-ESR ceramic capacitor on VIN is required for input bypassing, but COUT is optional and only recommended for specific noise-reduction scenarios - not for stability.
How does the enable pin of the LM4132AMF-2.0 interface with a 1.8 V microcontroller GPIO?
The LM4132AMF-2.0's EN pin has VIH ≥ 65% VIN and VIL ≤ 35% VIN thresholds. When VIN = 3.3 V, VIH = 2.145 V - above 1.8 V logic high. Therefore, direct connection to a 1.8 V GPIO is unsafe. Use a level-shifter or pull-up to VIN (≥2.15 V) driven by the 1.8 V GPIO to ensure reliable enable/disable control of the LM4132AMF-2.0.
Is the LM4132AMF-2.0 suitable for driving the reference input of a 24-bit delta-sigma ADC?
Yes. The LM4132AMF-2.0 delivers 190 µVPP integrated noise (0.1–10 Hz), low 25 ppm/mA load regulation, and 20 mA output drive - sufficient to directly drive the dynamic reference input of precision 24-bit ADCs like the ADS1262 without buffer amplifiers. Its 10 ppm/°C tempco also preserves effective resolution across temperature.
LM4132AMF-2.0 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):
- 2.048V
- Voltage - Output (Max):
- -
- Current - Output:
- 20 mA
- Tolerance:
- ±0.05%
- Temperature Coefficient:
- 20ppm/°C
- Noise - 0.1Hz to 10Hz:
- 190µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 2.448V ~ 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
LM4132AMF-2.0 FAQ
1.How can I place an order for LM4132AMF-2.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4132AMF-2.0 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 LM4132AMF-2.0 reliable?
The price and inventory of LM4132AMF-2.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4132AMF-2.0 is usually 5 days.
3.What payment methods are accepted for LM4132AMF-2.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4132AMF-2.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4132AMF-2.0?
LM4132AMF-2.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4132AMF-2.0 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 LM4132AMF-2.0?
For technical support, including LM4132AMF-2.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4132AMF-2.0 requirements.
6.How does Aetrix verify that LM4132AMF-2.0 is sourced from the original manufacturer or authorized distributors?
All LM4132AMF-2.0 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 LM4132AMF-2.0 meets industry standards.
7.What is the process for return or replacement of LM4132AMF-2.0?
All LM4132AMF-2.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4132AMF-2.0, 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 LM4132AMF-2.0 part is unused and in its original packaging.
Return procedure for LM4132AMF-2.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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