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Texas Instruments LP2902DR
- Part No.:
- LP2902DR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LP2902DR.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:6,364
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Product details
Overview
LP2902DR from Texas Instruments is an ultra-low-power quadruple operational amplifier designed for battery-operated systems requiring wide supply range and ground-sensing inputs. It delivers 85 μA typical supply current, 2 mV typical input offset voltage, and 2 nA typical input bias current across −40°C to +85°C, enabling precision signal conditioning in portable instrumentation and LCD display biasing.
For engineers reviewing the LP2902DR datasheet, LP2902DR pinout, LP2902DR application, or LP2902DR equivalent, key selection criteria include single-supply operation with rail-to-rail input (to GND), 3–32 V supply flexibility, pin compatibility with LM324, and thermal performance in SOIC-14 packages under industrial temperature conditions.
Technical Context
The LP2902DR implements four independent high-input-impedance op-amps in a single SOIC-14 package, each featuring input common-mode voltage range extending to ground-enabling true single-supply sensor interfacing. Its architecture prioritizes low quiescent current over bandwidth, with 100 kHz gain-bandwidth product and 50 V/ms slew rate at ±15 V.
It supports dual- or single-supply operation via dedicated VCC+ and VCC− pins, where VCC− may be connected to ground. Input offset drift is 10 μV/°C, and PSRR/CMRR are both 75–90 dB across its full operating temperature range, ensuring stable DC-coupled amplification in noisy environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 85 μA typical per amplifier - enables multi-channel analog front-ends in coin-cell or energy-harvesting systems |
| Input Offset Voltage | 2 mV typical at 25°C - supports accurate DC amplification without trimming in low-cost sensor interfaces |
| Input Bias Current | 2 nA typical - minimizes voltage error across high-impedance sources like photodiodes or pH electrodes |
| Supply Voltage Range | 3 V to 32 V single supply - accommodates 3.3 V microcontrollers up to 24 V industrial rails without level-shifting |
| Input Common-Mode Range | Includes ground (0 V) - allows direct connection of unipolar sensors (e.g., thermistors, RTDs) to VCC/GND-referenced supplies |
| Gain-Bandwidth Product | 100 kHz - sufficient for anti-aliasing filters, transducer signal conditioning, and slow-control loops |
| Output Swing | Within 1.9 V of rails at full load - provides usable dynamic range in 5 V or 12 V single-supply configurations |
Pinout & Package
LP2902DR is packaged in a 14-pin SOIC (D package) with 1.27 mm pitch, 8.75 mm × 3.91 mm body, and 1.75 mm max height - compatible with standard surface-mount assembly and IPC-7351 land patterns.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8, 14 | Amplifier outputs (1OUT, 2OUT, 3OUT, 4OUT) | Push-pull outputs capable of sourcing/sinking ≥7 mA - drive resistive loads, LED indicators, or ADC input buffers directly |
| 2, 6, 9, 13 | Inverting inputs (1IN−, 2IN−, 3IN−, 4IN−) | High-impedance differential inputs accepting signals down to ground - enable inverting configurations with grounded reference |
| 3, 5, 10, 12 | Non-inverting inputs (1IN+, 2IN+, 3IN+, 4IN+) | Matched input structure to inverting pins - supports unity-gain buffers, differential receivers, and active filters |
| 4 | VCC+ | Positive supply terminal - must be ≥3 V above VCC−; sets upper rail for all four amplifiers |
| 11 | VCC− | Negative supply or ground reference - enables true single-supply operation when tied to GND |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 85 μA per amplifier - extends battery life in always-on portable devices beyond 10 years on CR2032 |
| Ground-sensing input stage | Input common-mode range includes 0 V - eliminates need for negative supply or level-shifting circuitry in sensor front-ends |
| Wide supply voltage support | 3–32 V single supply - simplifies power architecture across mixed-voltage systems (e.g., 3.3 V MCU + 12 V actuator) |
| LM324 pin compatibility | Identical pinout and footprint - allows drop-in replacement in legacy designs without PCB revision |
| Industrial temperature range | −40°C to +85°C operation - ensures reliability in automotive cabin modules, outdoor meters, and factory-floor equipment |
Applications
| LCD Display Biasing | Portable Instrumentation |
|---|---|
Use Scenario: Generating stable DC bias voltages for segment drivers in monochrome STN-LCDs. IC Role / Device Role / Timing Role: Quad op-amp configured as precision voltage followers and summing amplifiers to set VON/VOFF thresholds. Use Value: Low input bias current prevents charge leakage across high-value LCD impedance, maintaining contrast stability over temperature. | Use Scenario: Amplifying low-level thermocouple or strain gauge outputs in handheld multimeters and data loggers. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier with programmable gain and offset correction. Use Value: 2 mV offset and 10 μV/°C drift minimize calibration burden while 85 μA current enables >500 hr runtime on AA batteries. |
| Sensor Signal Conditioning | Low-Power Power Supply Monitoring |
Use Scenario: Buffering and scaling output of humidity, pressure, or gas sensors with high source impedance. IC Role / Device Role / Timing Role: Unity-gain buffer isolating sensor element from downstream ADC input capacitance. Use Value: 2 nA input bias current avoids significant voltage error across 10 MΩ sensor elements, preserving measurement accuracy. | Use Scenario: Monitoring 12 V or 24 V rail voltages in battery-powered gateways using resistor-divider feedback. IC Role / Device Role / Timing Role: Precision comparator input stage or rail-sensing amplifier feeding microcontroller ADC. Use Value: 3–32 V supply range allows direct sensing without external regulators; low power enables continuous monitoring during sleep modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM324DR | Higher 1.2 mA supply current; wider −25°C to +85°C temp range; lower 70 dB PSRR | Not suitable for ultra-low-power battery systems; acceptable in AC-powered instrumentation | Select LM324DR only when higher speed (1.2 MHz GBW) or cost sensitivity outweighs current budget constraints |
| TLV2464IDR | Lower 22 μA supply current; rail-to-rail I/O; 6.4 V max supply; 0.05 mV offset | Requires 3.3 V or lower supply; unsuitable for 12/24 V industrial rails | Choose TLV2464IDR for sub-5 V battery systems needing rail-to-rail output swing and micro-power operation |
Compared with LM324DR and TLV2464IDR, the LP2902DR uniquely balances ultra-low current (85 μA), wide supply (3–32 V), ground-sensing inputs, and industrial temperature rating - making it the optimal choice for long-life, mixed-rail, sensor-based embedded systems where neither legacy LM324 nor modern rail-to-rail parts fully satisfy requirements.
Availability
LP2902DR is available at Aetrix Electronics and suitable for portable instrumentation, LCD display biasing, and low-power power supply monitoring requiring stable component supply across extended production lifecycles.
Supply support for LP2902DR 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The LP2902DR belongs to TI's precision low-power op-amp portfolio, engineered specifically for battery-constrained applications demanding wide supply range, ground-referenced inputs, and long-term reliability in harsh ambient conditions.
FAQ
What is the maximum supply voltage for LP2902DR?
The LP2902DR supports a maximum single-supply voltage of 32 V, or ±16 V in dual-supply mode. Absolute maximum ratings specify that exceeding 32 V on VCC+ relative to VCC− may cause permanent damage. For reliable operation, TI recommends staying within the recommended operating condition of 3 V to 32 V, with thermal derating applied above 25°C ambient per the device's RθJA of 140°C/W in SOIC-14 packaging. The LP2902DR maintains specified electrical performance across this full range.
Is LP2902DR pin-compatible with LM324?
Yes, the LP2902DR is fully pin-compatible with the LM324 in SOIC-14 (D) packaging. Pin functions-including all four amplifier inputs, outputs, VCC+, and VCC−-match identically. This allows direct substitution in existing LM324-based designs without layout changes. However, note that LP2902DR operates at significantly lower supply current (85 μA vs. 1.2 mA) and offers improved PSRR and CMRR, so system-level validation of timing and noise margins is recommended after replacement. The LP2902DR retains identical mechanical footprint and solder-reflow profile.
Does LP2902DR support true single-supply operation?
Yes, the LP2902DR supports true single-supply operation because its input common-mode voltage range includes ground (0 V), and its output can swing within 1.9 V of the negative rail (VCC−). When VCC− is connected to ground, the device accepts input signals from 0 V up to VCC−1.5 V and delivers output from ~0.8 V to VCC−1.9 V under load. This eliminates the need for split supplies or level-shifting networks in sensor interfaces, battery monitors, and LCD bias circuits - a key design advantage confirmed in the LP2902DR datasheet Section 3 and Figure 4-1.
What is the operating temperature range of LP2902DR?
The LP2902DR is rated for operation from −40°C to +85°C ambient temperature, qualifying it for industrial and automotive cabin applications. This range is explicitly defined in the Device Information table and Recommended Operating Conditions section of the datasheet. Unlike the commercial-grade LP324 (0°C to +70°C), the LP2902DR's extended temperature capability ensures parametric stability-including offset voltage, bias current, and PSRR-across thermal extremes encountered in outdoor meters, factory automation, and vehicle subsystems. All electrical characteristics in the LP2902DR datasheet are guaranteed over this full range.
Can LP2902DR drive capacitive loads directly?
The LP2902DR is not optimized for driving large capacitive loads (>100 pF) without isolation resistance, as its 100 kHz gain-bandwidth product and 50 V/ms slew rate limit phase margin under reactive loading. Driving ADC input capacitors or long cables may induce ringing or instability. TI recommends adding a 100 Ω to 500 Ω series resistor between LP2902DR output and capacitive load to maintain stability. For applications requiring direct capacitive drive (e.g., >1 nF), consider buffered configurations or op-amps with higher slew rate and specified capacitive-load drive capability. This behavior is consistent across all LP2902 variants including LP2902DR.
LP2902DR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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 (x4 Channels)
- Current - Output / Channel:
- 10 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 32 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
LP2902DR FAQ
1.How can I place an order for LP2902DR through Aetrix?
Please submit a Request for Quotation (RFQ) for LP2902DR 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 LP2902DR reliable?
The price and inventory of LP2902DR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP2902DR is usually 5 days.
3.What payment methods are accepted for LP2902DR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP2902DR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP2902DR?
LP2902DR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP2902DR 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 LP2902DR?
For technical support, including LP2902DR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP2902DR requirements.
6.How does Aetrix verify that LP2902DR is sourced from the original manufacturer or authorized distributors?
All LP2902DR 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 LP2902DR meets industry standards.
7.What is the process for return or replacement of LP2902DR?
All LP2902DR units undergo pre-shipment inspection (PSI). If there is an issue with LP2902DR, 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 LP2902DR part is unused and in its original packaging.
Return procedure for LP2902DR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LP2902DR Tags
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LM358DT
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LM358DR
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