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Texas Instruments LP2904DR
- Part No.:
- LP2904DR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LP2904DR.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,914
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Product details
Overview
LP2904DR from Texas Instruments is a dual ultra-low-power operational amplifier optimized for battery-powered and industrial sensing applications. It delivers 54 μA typical supply current, 2 mV typical input offset voltage, and rail-to-rail input operation down to GND, enabling single-supply signal conditioning in portable instrumentation and LCD bias circuits.
For engineers reviewing the LP2904DR datasheet, LP2904DR pinout, LP2904DR application, or LP2904DR equivalent, key selection criteria include its –40°C to +85°C operating temperature range, SOIC-8 package compatibility with LM2904/LM358, and verified performance at 3 V to 32 V supply voltages with input common-mode range extending to ground.
Technical Context
The LP2904DR 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 spans 0 V to VCC – 1.5 V, supporting true single-supply operation without level-shifting circuitry.
It operates across 3 V–32 V supplies with guaranteed functionality over –40°C to +85°C, distinguishing it from the LP358 (0°C–70°C). Electrical characteristics-including 40–70 V/mV large-signal voltage gain and 80–90 dB CMRR-are specified separately for full-temperature-range performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 54 μA typical per amplifier - enables multi-year battery life in always-on sensor nodes |
| Input Offset Voltage | 2 mV typical - supports accurate DC-coupled amplification of low-level sensor signals |
| Input Bias Current | 2 nA typical - minimizes voltage error in high-impedance source interfaces (e.g., thermistors) |
| Common-Mode Input Range | 0 V to VCC – 1.5 V - allows direct connection of GND-referenced sensors without biasing resistors |
| Output Swing (Low) | 0.7 V typical at 0.35 mA sink - supports logic-level interfacing when driving TTL/CMOS inputs |
| Operating Temperature | –40°C to +85°C - qualified for automotive interior, industrial control, and outdoor metering environments |
| Gain Bandwidth Product | 100 kHz - sufficient for DC–10 kHz signal conditioning in precision analog front-ends |
Pinout & Package
LP2904DR 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 (MSL Level-1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT1 | Channel 1 output - drives external loads up to 10 mA sink/source; not rail-to-rail |
| 2 | IN1− | Channel 1 inverting input - accepts differential signals within 0 V to VCC – 1.5 V common-mode range |
| 3 | IN1+ | Channel 1 noninverting input - enables unity-gain buffer or precision comparator configurations |
| 4 | GND | Analog ground reference - must be connected directly to system ground plane for noise immunity |
| 5 | IN2+ | Channel 2 noninverting input - electrically isolated from Channel 1; supports dual independent signal paths |
| 6 | IN2− | Channel 2 inverting input - shares same input stage architecture and specifications as IN1− |
| 7 | OUT2 | Channel 2 output - identical electrical behavior to OUT1; no crosstalk between channels |
| 8 | VCC | Positive supply rail - accepts 3 V–32 V; requires 0.1 μF ceramic bypass capacitor placed adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low supply current | 54 μA per amplifier enables >10-year operation on coin-cell batteries in continuous-sense applications |
| Ground-sensing input stage | Input common-mode range includes 0 V - eliminates need for input bias networks in single-supply transducer interfaces |
| Pin compatibility with industry standards | SOIC-8 pinout matches LM2904 and LM358 - allows drop-in replacement without PCB redesign |
| Wide supply voltage range | 3 V–32 V operation supports both low-voltage portable systems and industrial 24 V rails |
| Thermal robustness | Junction-to-ambient thermal resistance of 118.8°C/W - sustains full performance under 85°C ambient conditions |
Applications
| Portable Instrumentation | LCD Display Biasing |
|---|---|
Use Scenario: Battery-powered multimeter measuring microamp-level leakage currents. IC Role / Device Role / Timing Role: Dual op-amp configured as precision current-to-voltage converter and buffer amplifier. Use Value: 2 nA input bias current prevents measurement error; 54 μA supply current extends battery life beyond 5 years. |
Use Scenario: Driving segment electrodes in monochrome STN LCD panels requiring stable DC bias voltages. IC Role / Device Role / Timing Role: Dual op-amp used as rail-referenced voltage follower and adjustable divider buffer. Use Value: Input common-mode range to GND enables direct connection to LCD controller's 0 V reference; low drift ensures contrast stability over temperature. |
| Sensor Signal Conditioning | Industrial Power Supply Monitoring |
Use Scenario: Amplifying output of a 10 kΩ NTC thermistor in HVAC temperature feedback loop. IC Role / Device Role / Timing Role: Noninverting amplifier with gain = 10, referenced to system GND. Use Value: 2 mV input offset voltage limits temperature error to <±0.2°C; wide VCC range accommodates 12 V or 24 V supply rails. |
Use Scenario: Monitoring output voltage and current in programmable bench power supply. IC Role / Device Role / Timing Role: One amplifier as voltage sense buffer, second as current-sense amplifier with 50 V/V gain. Use Value: 80 dB CMRR rejects switching noise from PWM-controlled output stage; 32 V absolute max rating protects against transient overvoltage events. |
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 | Same SOIC-8 pinout and basic specs, but wider input offset voltage (3 mV typ), higher supply current (700 μA), and narrower temp range (0°C–70°C) | Not suitable for extended-temperature industrial or automotive interior use; higher power draw limits battery life | Select LM2904DR only for cost-sensitive, non-battery, commercial-temp applications where legacy design reuse is required |
| TLV2462IDR | Rail-to-rail output swing, lower offset (1.6 mV), but higher supply current (550 μA) and narrower VCC range (2.7 V–6 V) | Cannot replace LP2904DR in 12 V/24 V systems or ultra-low-power designs; superior for precision low-voltage ADC drivers | Choose TLV2462IDR when rail-to-rail output and sub-mV offset are critical, and supply voltage is ≤6 V |
Compared with LM2904DR and TLV2462IDR, the LP2904DR uniquely balances ultra-low quiescent current, extended temperature range, and wide supply voltage-making it the only option among the three viable for long-life, wide-input-range, industrial-grade analog signal conditioning.
Availability
LP2904DR is available at Aetrix Electronics and suitable for portable instrumentation, LCD display biasing, and industrial power supply monitoring requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for LP2904DR 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 specializing in analog and embedded processing technologies, with leadership in precision analog ICs, power management, and signal chain solutions.
The LP2904DR belongs to TI's low-power operational amplifier product line, designed specifically for energy-constrained, wide-supply, and extended-temperature applications including battery-operated sensors and industrial control systems.
FAQ
What is the maximum supply voltage rating for the LP2904DR?
The LP2904DR has an absolute maximum supply voltage of 32 V, with recommended operation from 3 V to 32 V. Exceeding 32 V risks permanent damage per the Absolute Maximum Ratings table in the datasheet. For reliable long-term operation, TI specifies VCC ≤30 V in electrical test conditions.
Does the LP2904DR support true rail-to-rail input and output operation?
The LP2904DR supports rail-to-rail input operation down to GND (0 V) and up to VCC – 1.5 V, but does not provide rail-to-rail output swing. Its output can typically swing to within ~1.9 V of VCC (high side) and ~0.7 V above GND (low side) under 0.35 mA load, as confirmed in the Electrical Characteristics table for LP2904DR.
Is the LP2904DR pin-compatible with the LM2904 and LM358?
Yes, the LP2904DR uses the identical SOIC-8 pinout as the LM2904 and LM358, with matching pin functions: Pin 1 (OUT1), Pin 2 (IN1−), Pin 3 (IN1+), Pin 4 (GND), Pin 5 (IN2+), Pin 6 (IN2−), Pin 7 (OUT2), Pin 8 (VCC). This enables direct substitution in existing designs without layout changes.
What is the operating temperature range specified for the LP2904DR?
The LP2904DR is rated for operation from –40°C to +85°C, as explicitly stated in the Recommended Operating Conditions table. This distinguishes it from the LP358 (0°C to 70°C) and makes it suitable for automotive interior, industrial control, and outdoor metering applications.
Can the LP2904DR drive capacitive loads without instability?
The LP2904DR is unity-gain stable and characterized for driving ≥100 pF capacitive loads, as indicated by its 100 kHz gain-bandwidth product and internal compensation. However, for loads >500 pF, TI recommends adding a small series resistor (e.g., 10–50 Ω) between the output and capacitance to maintain phase margin and prevent oscillation.
LP2904DR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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
LP2904DR FAQ
1.How can I place an order for LP2904DR through Aetrix?
Please submit a Request for Quotation (RFQ) for LP2904DR 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 LP2904DR reliable?
The price and inventory of LP2904DR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP2904DR is usually 5 days.
3.What payment methods are accepted for LP2904DR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP2904DR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP2904DR?
LP2904DR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP2904DR 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 LP2904DR?
For technical support, including LP2904DR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP2904DR requirements.
6.How does Aetrix verify that LP2904DR is sourced from the original manufacturer or authorized distributors?
All LP2904DR 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 LP2904DR meets industry standards.
7.What is the process for return or replacement of LP2904DR?
All LP2904DR units undergo pre-shipment inspection (PSI). If there is an issue with LP2904DR, 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 LP2904DR part is unused and in its original packaging.
Return procedure for LP2904DR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LP2904DR Tags
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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
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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
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LM2902DR
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LM358P
Texas Instruments
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