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Texas Instruments LPV542DNXR
- Part No.:
- LPV542DNXR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-XFDFN Exposed Pad
- Datasheet:
-
LPV542DNXR.pdf
- Description:
- IC CMOS 2 CIRCUIT 8X1SON
- Quantity:
- Payment:
- Shipping:
Inventory:4,603
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Product details
Overview
LPV542DNXR from Texas Instruments is a dual nanopower rail-to-rail input/output CMOS operational amplifier optimized for ultra-low-power sensing and signal conditioning in battery-constrained systems. It delivers 8 kHz gain-bandwidth at 490 nA per channel quiescent current, 3 mV max offset voltage, and operates from 1.6 V to 5.5 V supply - enabling reliable operation in oxygen sensors, wearable health monitors, and energy-harvested IoT nodes.
For engineers reviewing the LPV542DNXR datasheet, LPV542DNXR pinout, LPV542DNXR application, or LPV542DNXR equivalent, key selection criteria include its picoampere-level input bias current (1 pA typ), rail-to-rail input common-mode range extending to both supply rails, output swing within 3 mV of rails at 3.3 V, EMI-hardened design, and operation across –40°C to 125°C industrial temperature range.
Technical Context
The LPV542DNXR employs a complementary CMOS input stage - parallel N-channel and P-channel differential pairs - enabling true rail-to-rail input operation with a 400 mV transition region near V+ where PSRR and CMRR degrade. Its unity-gain-stable architecture supports stable operation with capacitive loads up to 20 pF; heavier loads require external isolation resistors.
Each channel features ultra-low input bias current (1 pA typical) and high input impedance (10¹³ Ω || 2.5 pF), minimizing error in high-impedance sensor interfaces like photodiodes and electrochemical cells. The device's 1 µV/°C typical offset drift and 80–109 dB PSRR ensure stable DC accuracy across voltage and temperature variations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.6 V to 5.5 V - enables direct interface with single-cell Li-ion (3.0–3.7 V), coin-cell (1.5–3.0 V), and low-voltage energy harvesters without regulation. |
| Quiescent Current / Ch | 490 nA (typ) at 1.8 V - extends battery life to years in always-on remote sensors and wearables with intermittent wake-up cycles. |
| Input Offset Voltage | ±3 mV (max) at room temperature - ensures sub-millivolt DC accuracy in precision reference buffers and low-level transducer amplification. |
| Gain-Bandwidth Product | 8 kHz (typ) - sufficient for DC-coupled biosignal acquisition (ECG, pulse oximetry), gas sensor conditioning, and slow analog telemetry. |
| Input Bias Current | 1 pA (typ) - prevents significant voltage drop across >100 MΩ feedback networks used in photodiode and electrochemical sensor front-ends. |
| Rail-to-Rail I/O | Input CMVR = V− to V+, output swing = within 3 mV of V− and V+ at 3.3 V - maximizes dynamic range and simplifies level-shifting in single-supply systems. |
| Operating Temperature | –40°C to +125°C - qualified for automotive cabin modules, industrial smoke/gas detectors, and outdoor environmental sensors. |
Pinout & Package
LPV542DNXR is housed in an 8-pad X1SON (DNX) package measuring 3.0 mm × 3.0 mm × 0.45 mm, with an exposed thermal die pad on the underside that must be connected to V− for optimal thermal performance and EMI immunity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: OUT A | Channel A output | Amplified output signal for first op-amp channel; capable of sourcing/sinking ≥1 mA into 100 kΩ load while staying within 3 mV of rails. |
| 2: –IN A | Channel A inverting input | Differential input node; accepts signals down to V− and up to V+; high-impedance (10¹³ Ω) minimizes loading on high-Z sources. |
| 3: +IN A | Channel A non-inverting input | Differential input node; identical electrical characteristics to –IN A; used in buffer, follower, and summing configurations. |
| 4: V− | Negative supply terminal | Reference ground for dual-supply use or system ground in single-supply designs; thermal die pad must be soldered to this net. |
| 5: +IN B | Channel B non-inverting input | Independent second amplifier input; enables dual-sensor conditioning (e.g., O₂ sensor + temperature compensation) on one die. |
| 6: –IN B | Channel B inverting input | Second differential input pair; electrically matched to Channel A for consistent DC performance across both channels. |
| 7: OUT B | Channel B output | Second independent output; same drive capability and rail-swing specs as OUT A - supports dual-path signal chains without extra ICs. |
| 8: V+ | Positive supply terminal | Primary power input; accepts 1.6–5.5 V; internal regulation not required - reduces BOM count in low-power systems. |
Key Features
| Feature | Design Value |
|---|---|
| EMI Hardening | Integrated RF filtering suppresses interference from mobile phones, WiFi, and RFID readers - critical for medical wearables operating in noisy RF environments. |
| Picoampere Input Bias | 1 pA typical bias current enables accurate amplification of nanoamp-level currents from electrochemical sensors (e.g., oxygen, CO, NO₂) without calibration drift. |
| Ultra-Low Power Operation | 490 nA per channel allows continuous monitoring in coin-cell-powered devices for >5 years - validated across –40°C to 125°C temperature range. |
| Rail-to-Rail Input Stage | Complementary N/P-channel input pairs cover full V− to V+ range - eliminates need for level-shifting circuitry in single-supply sensor interfaces. |
| Low Input Offset Drift | 1 µV/°C typical TCVos ensures <10 µV total offset shift over 85°C ambient range - maintains accuracy in unregulated battery-powered applications. |
Applications
| Oxygen Sensor Signal Conditioning | Wearable Health Monitor Front-End |
|---|---|
Use Scenario: Amplifying low-current output (nA–µA) from electrochemical oxygen sensors in portable analyzers and ventilators. IC Role / Device Role / Timing Role: Dual-channel nanopower transimpedance amplifier and reference buffer - Channel A converts sensor current to voltage; Channel B buffers reference electrode potential. Use Value: 1 pA input bias prevents sensor polarization errors; rail-to-rail input accommodates varying reference potentials; 490 nA IQ enables 24/7 operation on CR2032. |
Use Scenario: Conditioning biopotential signals (ECG, EMG) in fitness bands and smart patches with multi-day battery life. IC Role / Device Role / Timing Role: Low-noise, low-drift instrumentation amplifier front-end - configured as dual-stage gain/DC-blocking filter before ADC sampling. Use Value: 250 nV/√Hz input noise preserves signal integrity; 3 mV max Vos avoids baseline wander; 125°C rating supports skin-contact thermal reliability. |
| Solar-Powered Environmental Node | PIR Motion Detector Signal Chain |
Use Scenario: Signal conditioning for thermistor, humidity, and gas sensors in off-grid solar-powered air quality monitors. IC Role / Device Role / Timing Role: Dual-channel precision buffer and sensor excitation driver - one channel buffers reference voltage; the other drives resistive sensor bridges. Use Value: 1.6 V minimum supply allows direct connection to partially discharged LiFePO₄ cells; 85°C ambient rating suits outdoor enclosures; EMI hardening rejects solar inverter noise. |
Use Scenario: Amplifying microvolt-level pyroelectric sensor outputs in battery-operated security lights and smart home motion detectors. IC Role / Device Role / Timing Role: High-impedance AC-coupled preamplifier with adjustable gain - configured as two-stage active filter to reject 50/60 Hz mains interference. Use Value: Rail-to-rail output swing maximizes ADC utilization; 490 nA IQ extends CR123A battery life beyond 2 years; –40°C rating ensures winter reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nanopower op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV852DR | Higher IQ (500 nA/ch), wider GBW (10 kHz), but only specified down to –20°C; no EMI hardening. | Less suitable for automotive or outdoor industrial deployments requiring full –40°C to 125°C operation. | Prefer LPV542DNXR when extended temperature range, EMI immunity, or lower IQ is mandatory. |
| OPA316IDBVR | Higher IQ (400 µA/ch), much higher GBW (10 MHz), but 1000× higher power consumption. | Designed for higher-speed signal chains (e.g., audio, motor control), not nanopower sensing. | Choose LPV542DNXR exclusively for multi-year battery life; OPA316 is incompatible for energy-constrained nodes. |
Compared with TLV852DR and OPA316IDBVR, the LPV542DNXR uniquely balances ultra-low quiescent current (490 nA), full industrial temperature range (–40°C to 125°C), EMI resilience, and rail-to-rail I/O - making it the only viable choice for long-life, harsh-environment nanopower sensor interfaces.
Availability
LPV542DNXR is available at Aetrix Electronics and suitable for oxygen sensor modules, wearable health monitors, and solar-powered environmental nodes requiring stable component supply with guaranteed long-term manufacturability.
Supply support for LPV542DNXR 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 amplifiers and low-power signal chain solutions.
The LPV542DNXR belongs to TI's nanopower operational amplifier product line, engineered specifically for battery- and energy-harvesting–powered sensing applications demanding multi-year operation, wide temperature tolerance, and high DC accuracy.
FAQ
What is the maximum operating temperature for the LPV542DNXR?
The LPV542DNXR is fully specified and tested from –40°C to +125°C. This extended temperature range supports deployment in automotive cabin modules, industrial fire/gas detectors, and outdoor environmental sensors where ambient temperatures exceed standard commercial limits. All key parameters - including quiescent current, offset voltage, and gain-bandwidth - are guaranteed across this full range, as documented in Section 6.3 of the official datasheet.
Does the LPV542DNXR support rail-to-rail input and output simultaneously?
Yes, the LPV542DNXR supports true rail-to-rail input (common-mode range from V− to V+) and rail-to-rail output (swing within 3 mV of V− and V+ at 3.3 V). This dual capability eliminates the need for external level-shifting circuitry in single-supply systems, simplifying design for battery-powered sensor nodes. The input stage uses complementary N- and P-channel pairs to achieve full rail coverage, while the output stage delivers maximum dynamic range even at 1.6 V supply.
Can the LPV542DNXR drive capacitive loads directly?
The LPV542DNXR is unity-gain stable and internally compensated for loads up to 20 pF. For capacitive loads exceeding 20 pF - such as long PCB traces, cables, or ADC input capacitance - an external isolation resistor (RISO) must be placed between the output and the load to maintain phase margin and prevent peaking or oscillation. Figure 38 in the datasheet provides recommended RISO values based on load capacitance and required bandwidth.
How does the LPV542DNXR minimize errors in high-impedance sensor interfaces?
The LPV542DNXR minimizes errors through 1 pA typical input bias current, 10¹³ Ω input impedance, and rail-to-rail input common-mode range - all critical for electrochemical and photodiode sensors. Its low 1 µV/°C offset drift and ±3 mV max VOS ensure stable DC accuracy without frequent recalibration. These characteristics collectively prevent signal degradation in megaohm feedback networks used in oxygen sensors and precision reference buffers.
Is the LPV542DNXR pin-compatible with other packages of the same part number?
The LPV542DNXR (X1SON-8) shares identical pinout and electrical functionality with the LPV542DGKR (VSSOP-8) variant, as confirmed in the "Pin Configuration and Functions" section of the datasheet. Both packages use the same 1–8 pin numbering and terminal assignments. However, due to differing thermal and parasitic characteristics, layout and decoupling must be re-validated when switching packages - especially for EMI-sensitive or high-precision applications.
LPV542DNXR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-XFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- CMOS
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.0037V/µs
- Gain Bandwidth Product:
- 8 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.1 pA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 480nA (x2 Channels)
- Current - Output / Channel:
- 36 mA
- Voltage - Supply Span (Min):
- 1.6 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-X1SON (3x3)
LPV542DNXR FAQ
1.How can I place an order for LPV542DNXR through Aetrix?
Please submit a Request for Quotation (RFQ) for LPV542DNXR 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 LPV542DNXR reliable?
The price and inventory of LPV542DNXR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LPV542DNXR is usually 5 days.
3.What payment methods are accepted for LPV542DNXR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LPV542DNXR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LPV542DNXR?
LPV542DNXR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LPV542DNXR 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 LPV542DNXR?
For technical support, including LPV542DNXR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LPV542DNXR requirements.
6.How does Aetrix verify that LPV542DNXR is sourced from the original manufacturer or authorized distributors?
All LPV542DNXR 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 LPV542DNXR meets industry standards.
7.What is the process for return or replacement of LPV542DNXR?
All LPV542DNXR units undergo pre-shipment inspection (PSI). If there is an issue with LPV542DNXR, 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 LPV542DNXR part is unused and in its original packaging.
Return procedure for LPV542DNXR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LPV542DNXR Tags
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