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Texas Instruments LP2902MX
- Part No.:
- LP2902MX
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LP2902MX.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,131
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Product details
Overview
LP2902MX from Texas Instruments is a micropower quad operational amplifier optimized for battery-powered systems, featuring 85 μA typical supply current, 2 mV typical input offset voltage, and rail-to-ground input common-mode range. It operates from 3 V to 26 V single supply and interfaces directly with CMOS logic in portable instrumentation and sensor signal conditioning circuits.
For engineers reviewing the LP2902MX datasheet, LP2902MX pinout, LP2902MX application, or LP2902MX equivalent, key selection criteria include guaranteed −40°C to +85°C operation, SOIC-14 package compatibility, low-input-bias-current performance (2 nA typ), and verified pin-for-pin equivalence to LM324 in single-supply configurations.
Technical Context
The LP2902MX implements four independent, internally compensated op-amps with class-B output stages enabling both sourcing and sinking capability. Its input stage supports common-mode voltages down to ground, eliminating need for input biasing in single-supply designs.
It features micropower architecture with 100 kHz gain-bandwidth product and 50 V/ms slew rate-optimized for DC-critical, low-frequency applications such as sensor amplification and battery-monitoring comparators-not high-speed AC signal processing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 26 V single supply - enables direct use in 3.3 V, 5 V, 12 V, and 24 V battery or industrial rails without level-shifting. |
| Supply Current (per amp) | 85 μA typical - allows four-channel amplification in ultra-low-power systems with <340 μA total quiescent draw. |
| Input Offset Voltage | 2 mV typical (max 10 mV) - ensures accurate DC signal amplification in precision sensor front-ends and low-level transducer interfaces. |
| Input Bias Current | 2 nA typical (max 20 nA) - minimizes voltage error across high-impedance sources like thermistors or photodiodes. |
| Input Common-Mode Range | 0 V to V+ −1.5 V - supports true ground-referenced inputs, simplifying single-supply design without external bias networks. |
| Output Swing (sinking) | 0.7 V above GND (min at 350 μA) - delivers usable low-side drive into loads referenced to ground. |
| Operating Temperature | −40°C to +85°C - qualified for industrial and automotive under-hood environments requiring extended thermal stability. |
Pinout & Package
LP2902MX is housed in a 14-pin SOIC (D) package per JEDEC MS-012 AB, 3.9 mm body width, 1.75 mm max height, with standard 1.27 mm pitch and Q1 pin-1 orientation in tape-and-reel delivery.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Output A | Amplifier A output - placed at corner for minimal trace length; compatible with feedback routing to adjacent inverting input (Pin 2). |
| 2 | Inverting Input A | High-impedance input node for Amplifier A - adjacent to Output A (Pin 1) to reduce parasitic capacitance in closed-loop configurations. |
| 3 | Non-Inverting Input A | DC-coupled input supporting 0 V common-mode - enables ground-referenced sensor connections without level-shifting circuitry. |
| 4 | V− (GND) | Ground reference for all four amplifiers - serves as return path for input bias currents and output load currents. |
| 5 | Non-Inverting Input B | Independent input for Amplifier B - identical electrical characteristics to Pin 3; supports multi-channel simultaneous sensing. |
| 6 | Inverting Input B | Inverting node for Amplifier B - positioned adjacent to Output B (Pin 7) to minimize layout-induced phase shift in feedback paths. |
| 7 | Output B | Amplifier B output - corner pin placement facilitates compact PCB routing in dual-amplifier subsystems. |
| 8 | V+ | Positive supply rail - accepts 3 V–26 V; decoupling capacitor recommended within 1 cm for stable micropower operation. |
| 9 | Output C | Amplifier C output - electrically isolated from other outputs; supports independent gain/feedback networks per channel. |
| 10 | Inverting Input C | Inverting input for Amplifier C - matches Pin 2 and Pin 6 performance; validated for ≤2 nA bias current at −40°C to +85°C. |
| 11 | Non-Inverting Input C | Ground-capable input for Amplifier C - maintains full common-mode range even at minimum 3 V supply. |
| 12 | Non-Inverting Input D | Fourth amplifier non-inverting input - shares same input structure as Pins 3, 5, 11; supports rail-to-rail common-mode operation. |
| 13 | Inverting Input D | Inverting input for Amplifier D - positioned adjacent to Output D (Pin 14); layout-optimized for unity-gain buffer or comparator use. |
| 14 | Output D | Amplifier D output - final corner pin; enables symmetrical 4-channel layout with minimized crosstalk in mixed-signal PCBs. |
Key Features
| Feature | Design Value |
|---|---|
| Micropower operation | 85 μA per amplifier enables >1-year battery life in coin-cell-powered IoT sensors with 4-channel analog front-end. |
| Rail-to-ground input | 0 V input common-mode range eliminates need for external bias resistors or charge pumps in single-supply systems. |
| CMOS logic interface | Output swing to within 0.7 V of GND and 1.9 V below V+ ensures reliable TTL/CMOS-compatible logic-level generation. |
| Pin-for-pin LM324 replacement | Direct drop-in upgrade path reduces redesign effort while cutting supply current by 90% versus legacy quad op-amps. |
| Industrial temperature grade | −40°C to +85°C operating range supports deployment in motor controls, PLC I/O modules, and outdoor environmental monitors. |
Applications
| Portable Gas Sensor Signal Conditioning | Battery Voltage Monitor with Hysteresis |
|---|---|
|
Use Scenario: Amplifying low-level mV-range signals from electrochemical gas sensors powered by Li-ion batteries. IC Role / Device Role / Timing Role: LP2902MX provides four independent DC-coupled amplifiers: one for sensor gain, one for reference buffering, one for offset correction, and one as comparator with hysteresis. Use Value: 2 nA input bias current prevents loading of high-impedance sensor electrodes; 85 μA per amp extends battery runtime beyond 2 years in intermittent-read deployments. |
Use Scenario: Monitoring 3.7 V Li-ion cell voltage during charging/discharging cycles in handheld medical devices. IC Role / Device Role / Timing Role: LP2902MX configures two amplifiers as precision window comparator, one as reference buffer, and one as low-drift integrator for state-of-charge estimation. Use Value: 2 mV offset voltage ensures ±10 mV detection threshold accuracy; rail-to-ground input allows direct connection to battery anode without level-shifting. |
| Industrial Thermistor Linearization Circuit | Low-Power Smoke Detector Analog Front-End |
|
Use Scenario: Converting NTC thermistor resistance changes into linearized voltage output for HVAC control panels. IC Role / Device Role / Timing Role: LP2902MX implements constant-current source, differential amplifier, and active filter - all within one quad package. Use Value: 100 kHz GBW supports filtering of 50/60 Hz noise; 26 V max supply accommodates 24 V industrial bus power without external regulators. |
Use Scenario: Amplifying photoelectric chamber current (pA–nA range) in battery-operated residential smoke alarms. IC Role / Device Role / Timing Role: LP2902MX acts as transimpedance amplifier, baseline calibrator, alarm comparator, and LED driver buffer. Use Value: 2 nA input bias current avoids false triggering from leakage; 85 μA quiescent current enables 10-year shelf life on AA alkaline cells. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM324DR | Higher 1.5 mA supply current per amp; 7 mV max offset; no guaranteed −40°C operation. | Acceptable only in non-battery, commercial-temp applications where power efficiency is secondary. | Select LM324DR only when legacy LM324 footprint reuse is mandatory and thermal/energy constraints are absent. |
| TLV2464IDR | Lower 25 μA supply current; rail-to-rail input/output; but 2.7 V min supply limits 3 V system compatibility. | Suitable for newer ultra-low-voltage designs (<3.3 V), but requires PCB redesign due to different pinout and package (SOIC-14 vs TSSOP-14). | Choose TLV2464IDR only if sub-3 V operation and RRO performance justify layout revision and qualification effort. |
Compared with LM324DR, LP2902MX cuts supply current by 94% and adds industrial temperature support; compared with TLV2464IDR, it retains full 3 V compatibility and pinout alignment with legacy designs while trading RRO output for proven robustness in noisy industrial settings.
Availability
LP2902MX is available at Aetrix Electronics and suitable for portable instrumentation, battery voltage monitoring, industrial thermistor interfaces, and low-power smoke detector analog front-ends requiring stable component supply across long production lifecycles.
Supply support for LP2902MX 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 over 50 years of innovation in precision amplifiers and power-efficient signal chains.
The LP2902MX belongs to TI's micropower operational amplifier product line, engineered specifically for extended-battery-life applications demanding low input bias current, rail-to-ground operation, and industrial-grade reliability.
FAQ
What is the maximum supply voltage rating for LP2902MX?
The LP2902MX has an absolute maximum supply voltage of 26 V (or ±13 V). Operation above this limit risks permanent damage. The device is fully specified and production-tested from 3 V to 26 V, making it suitable for 24 V industrial rails and multi-cell battery systems. Always observe derating guidelines above 15 V to avoid thermal runaway during output short-circuit conditions.
Does LP2902MX support true ground-referenced input signals?
Yes, LP2902MX supports input common-mode voltages down to 0 V (ground), confirmed across its full −40°C to +85°C operating range. This eliminates the need for input biasing networks in single-supply applications such as sensor amplifiers and battery monitors. Exceeding −0.3 V below ground may activate parasitic structures and must be avoided via clamping diodes or series resistors.
Is LP2902MX pin-compatible with LM324?
Yes, LP2902MX is explicitly designed as a pin-for-pin replacement for LM324 in SOIC-14 packages. All 14 pins retain identical functions and electrical roles. However, due to its micropower architecture, LP2902MX exhibits lower slew rate (50 V/ms) and gain-bandwidth product (100 kHz) than LM324 - verify AC performance requirements before substitution in high-frequency circuits.
What is the typical input bias current of LP2902MX, and why does it matter?
The LP2902MX has a typical input bias current of 2 nA, with a maximum of 20 nA over temperature. This ultra-low value prevents significant voltage errors when interfacing with high-impedance sources such as thermistors, photodiodes, or pH electrodes. In a 1 MΩ source impedance, 2 nA bias introduces only 2 mV error - critical for precision DC measurements in portable instrumentation.
Can LP2902MX drive capacitive loads, and what is the recommended limit?
LP2902MX is stable driving capacitive loads from 50 pF to 1000 pF without external compensation, per TI's application hints. For loads exceeding 1000 pF, add a small isolation resistor (10–100 Ω) in series with the output. Avoid direct connection to long PCB traces or unbuffered ADC inputs >1000 pF, as phase margin degradation may cause oscillation - verified in Figure 7 (Frequency Response) of the SNOSBX6C datasheet.
LP2902MX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- -
- Slew Rate:
- 0.05V/µs
- Gain Bandwidth Product:
- 100 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 2 nA
- Voltage - Input Offset:
- 2 mV
- Current - Supply:
- 85µA
- Current - Output / Channel:
- 10 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 26 V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
LP2902MX FAQ
1.How can I place an order for LP2902MX through Aetrix?
Please submit a Request for Quotation (RFQ) for LP2902MX 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 LP2902MX reliable?
The price and inventory of LP2902MX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP2902MX is usually 5 days.
3.What payment methods are accepted for LP2902MX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP2902MX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP2902MX?
LP2902MX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP2902MX 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 LP2902MX?
For technical support, including LP2902MX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP2902MX requirements.
6.How does Aetrix verify that LP2902MX is sourced from the original manufacturer or authorized distributors?
All LP2902MX 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 LP2902MX meets industry standards.
7.What is the process for return or replacement of LP2902MX?
All LP2902MX units undergo pre-shipment inspection (PSI). If there is an issue with LP2902MX, 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 LP2902MX part is unused and in its original packaging.
Return procedure for LP2902MX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LP2902MX Tags
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LM358DT
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LM358DR
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LM2904DR
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LM358ADR
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LM2904DGKR
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LM324DR
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MCP6006T-E/OT
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MCP6006UT-E/OT
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LM324PWR
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LM2902PWR
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LM2902DR
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LM358P
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