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Texas Instruments LP2904D
- Part No.:
- LP2904D
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LP2904D.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:505
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Product details
Overview
LP2904D from Texas Instruments is a dual ultra-low-power operational amplifier designed for battery-operated and space-constrained analog signal conditioning. It delivers 54 µA typical supply current, 2 mV typical input offset voltage, and operates from 3 V to 32 V single supply - enabling use in portable instrumentation, LCD biasing, and low-voltage sensor front-ends.
For engineers reviewing the LP2904D datasheet, LP2904D pinout, LP2904D application, or LP2904D equivalent, key selection criteria include guaranteed –40°C to +85°C operation, rail-to-rail input (down to GND), output swing within 1.9 V of rails, and SOIC-8 pin compatibility with LM2904/LM358 for drop-in replacement in legacy designs.
Technical Context
The LP2904D integrates two independent, unity-gain-stable op-amps with Darlington-source/emitter-follower output stages that maintain quiescent current independence from load current. Its input common-mode range extends from ground to VCC – 1.5 V, supporting true single-supply operation without level-shifting circuitry.
It features 100 kHz gain-bandwidth product and 50 V/ms slew rate - optimized for precision DC-coupled amplification and filtering rather than high-speed signal processing. Input bias current remains at 2 nA (typ) across temperature, enabling high-impedance sensor interfacing without significant error drift.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 32 V - supports wide-input industrial power rails and long-life battery systems (e.g., 2×AA to 24 V). |
| Quiescent Current (per amp) | 54 µA (typ) - enables multi-year operation on coin cells or energy-harvesting sources. |
| Input Offset Voltage | 2 mV (typ), 10 mV (max over –40°C to +85°C) - ensures <0.2% gain error in 1 V full-scale sensor amplifiers. |
| Input Bias Current | 2 nA (typ) - permits use with >100 MΩ source impedances (e.g., pH electrodes, piezoresistive sensors). |
| Common-Mode Input Range | 0 V to VCC – 1.5 V - allows direct GND-referenced signal acquisition without input biasing networks. |
| Output Voltage Swing | VOL = 0.7 V (typ), VOH = VCC – 1.9 V (max) - delivers usable dynamic range in 5 V or 12 V systems. |
| Gain-Bandwidth Product | 100 kHz - sufficient for anti-aliasing filters, thermocouple amplifiers, and slow-loop control feedback paths. |
Pinout & Package
LP2904D is housed in an 8-pin SOIC (D) package measuring 4.90 mm × 3.91 mm, with standard JEDEC MS-012AC footprint and RoHS-compliant NiPdAu lead finish. Thermal resistance RθJA is 118.8°C/W, suitable for ambient temperatures up to +85°C without forced airflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Channel 1 Output | Amplified output of first op-amp; capable of sourcing 7 mA / sinking 4 mA into resistive loads. |
| 2 | Channel 1 Inverting Input | Inverts input signal when used in standard inverting configuration; accepts inputs down to GND. |
| 3 | Channel 1 Noninverting Input | Noninverting input node; supports common-mode voltages from 0 V to VCC – 1.5 V. |
| 4 | GND | Analog ground reference; must be connected directly to low-impedance system ground plane. |
| 5 | Channel 2 Noninverting Input | Independent noninverting input for second amplifier; electrically isolated from Channel 1. |
| 6 | Channel 2 Inverting Input | Independent inverting input for second amplifier; shares same input specification as Pin 2. |
| 7 | Channel 2 Output | Second independent output; identical drive capability and voltage swing to Pin 1. |
| 8 | VCC | Positive supply rail; bypass with 0.1 µF ceramic capacitor placed ≤2 mm from pin per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 54 µA per amplifier enables >10-year battery life in always-on sensor nodes using CR2032 cells. |
| Ground-sensing input stage | Input common-mode range includes 0 V, eliminating need for external bias resistors in single-supply transducer interfaces. |
| LM2904/LM358 pin compatibility | Direct PCB replacement in existing designs without layout changes or firmware updates. |
| Wide operating temperature range | Specified from –40°C to +85°C - qualified for automotive cabin, industrial control, and outdoor metering applications. |
| Robust ESD protection | ±2000 V HBM and ±1000 V CDM ratings reduce field failure risk during assembly and end-use handling. |
Applications
| LCD Display Biasing | Portable Instrumentation |
|---|---|
Use Scenario: Generating stable, low-noise DC bias voltages for segment drivers in monochrome STN LCD modules. IC Role / Device Role / Timing Role: Dual op-amp configured as precision voltage followers and level-shifters to set VCOM and segment reference voltages. Use Value: 2 mV offset ensures consistent contrast across display segments; 54 µA supply current extends handheld device runtime by >30% versus standard LM2904. | Use Scenario: Amplifying microvolt-level signals from thermocouples and strain gauges in handheld multimeters and data loggers. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier with high-Z inputs and rail-to-ground common-mode range. Use Value: 2 nA input bias current prevents loading errors on high-impedance sensor elements; –40°C to +85°C rating ensures accuracy across environmental test conditions. |
| Sensor Signal Conditioning | Low-Voltage Power Supply Monitoring |
Use Scenario: Buffering and scaling outputs from MEMS accelerometers and humidity sensors in IoT edge nodes. IC Role / Device Role / Timing Role: Dual-channel signal conditioner providing gain, filtering, and level translation before ADC sampling. Use Value: Independent amplifiers allow simultaneous conditioning of two sensor channels; 100 kHz GBW supports anti-aliasing filter implementation up to 10 kHz. | Use Scenario: Monitoring battery voltage and rail integrity in rechargeable consumer electronics (e.g., MP3 players, wireless toys). IC Role / Device Role / Timing Role: Precision comparator and voltage reference buffer for low-battery detection circuits. Use Value: 2 mV offset enables accurate 1% threshold detection at 3.3 V; 3 V minimum supply allows operation down to near-end-of-life battery voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2904DR | Higher 150 µA max supply current; 7 mV max offset; rated only to +70°C. | Not qualified for extended temperature industrial or automotive cabin use. | Select when cost is primary constraint and ambient temperature stays below 70°C. |
| TLV2462IDR | Rail-to-rail output; 600 µA supply current; 1.6 mV offset; 2.5 V min supply. | Requires ≥2.5 V supply; higher power consumption limits battery life. | Choose when full rail-to-rail output swing is mandatory and power budget allows ≥10× higher current. |
Compared with LM2904DR, LP2904D offers 2.8× lower max supply current and extended temperature qualification; compared with TLV2462IDR, it trades rail-to-rail output for 11× lower quiescent current and wider 3–32 V supply flexibility - making LP2904D optimal for long-life, wide-input, industrial-grade analog front-ends.
Availability
LP2904D is available at Aetrix Electronics and suitable for portable instrumentation, LCD display biasing, and low-voltage power supply monitoring requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for LP2904D 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and personal electronics markets.
The LP2904D belongs to TI's ultra-low-power operational amplifier product line, engineered specifically for battery-powered and energy-sensitive applications where precision, longevity, and wide supply voltage tolerance are critical design requirements.
FAQ
What is the maximum operating temperature range for the LP2904D?
The LP2904D is specified for continuous operation from –40°C to +85°C, making it suitable for industrial control panels, automotive cabin electronics, and outdoor metering equipment. This extended range exceeds the 0°C to +70°C limit of the LP358 and LM2904, and is validated per TI's production test flow with thermal characterization data confirming RθJA = 118.8°C/W under JEDEC JESD51-7 conditions.
Is the LP2904D pin-compatible with the LM2904?
Yes, the LP2904D uses the same SOIC-8 pinout as the LM2904 and LM358, with identical terminal assignments for VCC, GND, both inputs, and both outputs. This allows direct PCB replacement without layout modification. However, LP2904D improves upon LM2904 with lower supply current (54 µA vs 150 µA max) and extended temperature range (–40°C to +85°C vs 0°C to +70°C).
Can the LP2904D operate from a 3.3 V supply?
Yes, the LP2904D supports supply voltages as low as 3 V, including standard 3.3 V rails. At 3.3 V, its output swing is specified to 0.7 V (low) and 1.4 V (high) under 0.35 mA load, enabling use in low-voltage sensor interfaces and logic-level analog conditioning. Input common-mode range extends down to GND, ensuring full functionality even with single-ended 3.3 V signaling.
Does the LP2904D require external compensation for unity-gain stability?
No, the LP2904D is internally compensated for unity-gain stability across its full operating range. It achieves this with a 100 kHz gain-bandwidth product and 50 V/ms slew rate, eliminating the need for external compensation capacitors in standard inverting or noninverting configurations. This simplifies design and reduces BOM count in space-constrained applications like handheld medical devices.
What is the input bias current specification for the LP2904D at 85°C?
At +85°C, the LP2904D's input bias current is specified at 40 nA maximum (per amplifier), with a typical value of 20 nA. This is confirmed in Section 6.6 of the SLOS475A datasheet under "Electrical Characteristics: LP2904" with test condition TA = Full range (–40°C to +85°C). The low bias current enables reliable interfacing with high-impedance sources such as photodiodes and piezoelectric sensors even at elevated temperatures.
LP2904D Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- 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:
- 54µA (x2 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:
- 8-SOIC
LP2904D FAQ
1.How can I place an order for LP2904D through Aetrix?
Please submit a Request for Quotation (RFQ) for LP2904D 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 LP2904D reliable?
The price and inventory of LP2904D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP2904D is usually 5 days.
3.What payment methods are accepted for LP2904D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP2904D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP2904D?
LP2904D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP2904D 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 LP2904D?
For technical support, including LP2904D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP2904D requirements.
6.How does Aetrix verify that LP2904D is sourced from the original manufacturer or authorized distributors?
All LP2904D 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 LP2904D meets industry standards.
7.What is the process for return or replacement of LP2904D?
All LP2904D units undergo pre-shipment inspection (PSI). If there is an issue with LP2904D, 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 LP2904D part is unused and in its original packaging.
Return procedure for LP2904D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LP2904D Tags
-
LM358DT
STMicroelectronics
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LM358DR
Texas Instruments
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LM2904DR
Texas Instruments
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LM358ADR
Texas Instruments
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LM2904DGKR
Texas Instruments
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LM324DR
Texas Instruments
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MCP6006T-E/OT
Microchip Technology
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MCP6006UT-E/OT
Microchip Technology
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LM324PWR
Texas Instruments
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LM2902PWR
Texas Instruments
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LM2902DR
Texas Instruments
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LM358P
Texas Instruments
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