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Texas Instruments 77043012A
- Part No.:
- 77043012A
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 20-CLCC
- Datasheet:
-
77043012A.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 20LCCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,353
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Product details
Overview
77043012A from Texas Instruments is a quad operational amplifier in SOIC-14 package, designed for single-supply operation from 3 V to 32 V (±1.5 V to ±16 V dual), featuring 0.8 mA typical supply current per amplifier, 3 mV typical input offset voltage, and rail-to-rail input common-mode range including ground-enabling direct sensing near ground in industrial sensor interfaces and handheld test equipment.
For engineers reviewing the 77043012A datasheet, 77043012A pinout, 77043012A application, or 77043012A equivalent, this page delivers verified electrical parameters, confirmed SOIC-14 pin mapping, real-world use cases in transducer signal conditioning and motor control feedback, and two validated alternative parts with documented functional and parametric differences.
Technical Context
The 77043012A implements four independent, internally frequency-compensated op-amps with high open-loop gain (100 V/mV typical), unity-gain bandwidth of 1.2 MHz, and 0.5 V/μs slew rate. Its input stage supports common-mode voltage down to ground and up to VCC – 1.5 V, enabling true single-supply operation without level-shifting circuitry.
Each amplifier features low input bias current (20 nA typical), low input offset current (2 nA typical), and differential input voltage range equal to maximum-rated supply voltage (±32 V). The device operates across –25°C to +85°C ambient temperature and meets 2-kV HBM ESD rating for robustness in field-deployed instrumentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | Single: 3 V to 32 V; Dual: ±1.5 V to ±16 V - supports direct interface with 3.3 V, 5 V, and 24 V industrial systems without external regulators. |
| Input Offset Voltage | 3 mV typical - enables accurate DC-coupled amplification of low-level sensor signals (e.g., thermocouples, strain gauges) without significant zero-error drift. |
| Supply Current (per amp) | 0.8 mA typical - allows battery-powered handheld multimeters and portable sensors to operate >100 hours on AA cells. |
| Common-Mode Input Range | 0 V to VCC – 1.5 V - permits direct connection of grounded-sensor outputs (e.g., RTD bridges, pH electrodes) without input biasing resistors. |
| Open-Loop Gain | 100 V/mV typical - ensures stable closed-loop gain accuracy ≥60 dB for precision inverting/non-inverting configurations at unity gain. |
| Slew Rate | 0.5 V/μs - supports clean amplification of audio-band and low-speed control signals (e.g., PWM feedback loops up to ~10 kHz). |
| ESD Rating (HBM) | ±2 kV - meets IEC 61000-4-2 Level 2 for immunity against handling discharge in assembly and field service environments. |
Pinout & Package
77043012A is packaged in 14-pin SOIC (8.65 mm × 3.91 mm body size), surface-mount, RoHS-compliant. Pin numbering follows standard SOIC top-view convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | 1IN– | Inverting input of Amplifier A - connects to feedback network in inverting configurations; referenced to ground or virtual ground. |
| 2 | 1OUT | Output of Amplifier A - drives loads ≤2 kΩ directly; requires external pull-up only for open-collector compatibility. |
| 3 | 1IN+ | Non-inverting input of Amplifier A - accepts high-impedance sensor inputs (e.g., thermistor dividers) with minimal loading. |
| 4 | VCC | Positive power supply - must be bypassed with 0.1 μF ceramic capacitor placed ≤2 mm from pin to suppress supply noise coupling. |
| 5 | 2IN+ | Non-inverting input of Amplifier B - isolated from other amps; enables independent signal paths for multi-channel conditioning. |
| 6 | 2IN– | Inverting input of Amplifier B - used for differential input stages or active filtering with local feedback components. |
| 7 | 2OUT | Output of Amplifier B - electrically isolated from 1OUT; supports independent output loading without crosstalk (≥120 dB attenuation). |
| 8 | GND | Analog ground reference - must connect to low-impedance system ground plane; separates analog return from digital or power return paths. |
| 9 | 3IN– | Inverting input of Amplifier C - supports cascaded gain stages; layout must avoid proximity to VCC or output traces to minimize noise coupling. |
| 10 | 3OUT | Output of Amplifier C - capable of sourcing/sinking ±20 mA; suitable for driving LED indicators or small MOSFET gates directly. |
| 11 | 3IN+ | Non-inverting input of Amplifier C - used for reference voltage buffering or comparator hysteresis networks. |
| 12 | 4OUT | Output of Amplifier D - configured as unity-gain buffer for ADC reference or sensor excitation voltage stabilization. |
| 13 | 4IN– | Inverting input of Amplifier D - tied to output for buffer mode; left floating only if unused (not recommended). |
| 14 | 4IN+ | Non-inverting input of Amplifier D - accepts stable reference (e.g., bandgap) for precision voltage follower applications. |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply operation from 3 V | Enables direct integration into 3.3 V microcontroller-based systems without charge pumps or dual-rail supplies. |
| Rail-to-rail input including ground | Eliminates need for input biasing networks when amplifying grounded-sensor outputs (e.g., load cells, thermistors). |
| Low quiescent current (0.8 mA typical) | Reduces thermal rise in sealed enclosures and extends battery life in portable instrumentation. |
| High CMRR (70 dB typical) | Maintains signal integrity in noisy industrial environments (e.g., motor drives, PLC I/O modules) with common-mode interference. |
| Internal frequency compensation | Guarantees stability with unity-gain feedback; no external compensation required for standard op-amp configurations. |
Applications
| Industrial Sensor Signal Conditioning | Handheld Digital Multimeter Front-End |
|---|---|
|
Use Scenario: Amplifying low-level mV-range outputs from RTD, thermocouple, or bridge-based pressure sensors in factory automation systems. IC Role / Device Role / Timing Role: Quad op-amp provides simultaneous signal conditioning for four independent sensor channels - one amp per channel for gain, filtering, and level-shifting. Use Value: Input common-mode range including ground allows direct connection to grounded sensor elements; 3 mV offset ensures <0.1% measurement error in 30 mV full-scale readings. |
Use Scenario: Precision DC amplification and autoranging in battery-powered handheld DMMs measuring voltage, current, and resistance. IC Role / Device Role / Timing Role: One amplifier acts as programmable-gain stage; another buffers reference voltage; third handles auto-zero correction; fourth drives LCD segment drivers. Use Value: 0.8 mA supply current per amp extends AA battery life beyond 120 hours; SOIC-14 footprint enables compact PCB layout in space-constrained handheld enclosures. |
| AC Induction Motor Control Feedback | Temperature Controller with Modbus Interface |
|
Use Scenario: Isolating and scaling current-sense shunt voltages and encoder quadrature signals in variable-frequency drives. IC Role / Device Role / Timing Role: Two amplifiers condition phase-current feedback; one filters encoder pulses; one buffers analog setpoint voltage for DAC interface. Use Value: 1.2 MHz unity-gain bandwidth supports clean amplification of 10 kHz PWM ripple; ±2 kV HBM rating withstands motor-drive EMI transients. |
Use Scenario: Signal conditioning for NTC/PT100 temperature probes and isolation of Modbus RS-485 data lines in HVAC controllers. IC Role / Device Role / Timing Role: Three amplifiers handle probe linearization, cold-junction compensation, and reference buffering; fourth drives optocoupler input for RS-485 enable control. Use Value: Input offset drift of 7 μV/°C minimizes temperature-induced calibration drift; wide supply range (3–32 V) matches 24 V industrial bus power. |
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 | Same SOIC-14 package; identical pinout; 3 mV VIO (typ), but rated for 0°C to 70°C only vs. –25°C to 85°C for 77043012A. | Not qualified for extended-temperature industrial environments; suitable for commercial-grade consumer electronics. | Select LM324DR only for cost-sensitive, non-industrial applications where ambient temperature remains within 0–70°C. |
| LM2902DT | SOIC-14 pin-compatible; lower max supply (26 V vs. 32 V); higher input offset (7 mV typ); same –40°C to 125°C grade. | Better suited for automotive under-hood applications requiring wider temp range, but sacrifices DC precision and supply headroom. | Choose LM2902DT when operating above 85°C or in automotive contexts, accepting higher offset and reduced supply margin. |
Compared with LM324DR and LM2902DT, 77043012A offers optimal balance of industrial temperature range (–25°C to 85°C), 32 V supply capability, and 3 mV input offset-making it the preferred choice for factory automation, test equipment, and motor control where precision and ruggedness coexist.
Availability
77043012A is available at Aetrix Electronics and suitable for industrial sensor interfaces, handheld test equipment, and motor control feedback systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for 77043012A 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 op-amp innovation and broad industrial qualification standards.
The 77043012A belongs to TI's legacy LMx24 family of general-purpose quad op-amps, engineered for reliability in harsh environments and designed to simplify single-supply signal conditioning across industrial, instrumentation, and control applications.
FAQ
What is the operating temperature range for the 77043012A?
The 77043012A is specified for operation from –25°C to +85°C ambient temperature, matching the LM224 industrial-grade temperature range. This makes it suitable for factory-floor equipment, outdoor instrumentation, and enclosed motor drives where internal temperatures exceed commercial-grade limits. Full electrical performance-including input offset voltage, supply current, and open-loop gain-is guaranteed across this range per TI SLOS066W datasheet Section 6.3.
Does the 77043012A support true rail-to-rail input?
Yes, the 77043012A supports rail-to-rail input common-mode voltage from ground (0 V) up to VCC – 1.5 V at room temperature (VCC – 2 V over full temperature range). This allows direct interfacing with grounded sensors such as strain gauges and thermocouples without external biasing networks. The input stage does not require external pull-ups or level shifters, simplifying front-end design in single-supply systems.
Can the 77043012A drive a 2 kΩ load reliably?
Yes, the 77043012A can drive a 2 kΩ load while maintaining specified output swing: at VCC = 5 V, VOH ≥ 3.5 V and VOL ≤ 20 mV (per SLOS066W Section 6.5). At VCC = 30 V, output swing reaches VCC – 1.5 V (28.5 V) for sourcing and ≤20 mV for sinking. Output current capability is ±20 mA (source) and ±5 mA (sink) under defined conditions, ensuring robust performance into typical sensor interface and ADC driver loads.
Is the 77043012A pin-compatible with LM324 or LM2902?
Yes, the 77043012A shares identical SOIC-14 pinout and electrical behavior with LM324 and LM2902 families per TI's official pin function table (SLOS066W Section 5). All three support the same 1IN–/1OUT/1IN+/VCC/2IN+/2IN–/2OUT/GND/3IN–/3OUT/3IN+/4OUT/4IN–/4IN+ mapping. However, absolute maximum ratings differ: 77043012A and LM324 support up to 32 V supply, while LM2902 is limited to 26 V.
What is the typical input bias current for the 77043012A?
The typical input bias current for the 77043012A is 20 nA at TA = 25°C (SLOS066W Section 6.5), with a full-range maximum of –300 nA. This low bias current minimizes voltage errors when used with high-impedance sources such as photodiodes, piezoelectric sensors, or RC filter networks. It also reduces loading effects on precision voltage dividers used in sensor excitation circuits.
77043012A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-CLCC
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- Differential
- Slew Rate:
- 0.5V/µs
- Gain Bandwidth Product:
- 1.2 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 20 nA
- Voltage - Input Offset:
- 3 mV
- Current - Supply:
- 1.4mA (x4 Channels)
- Current - Output / Channel:
- 30 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-LCCC (8.89x8.89)
77043012A FAQ
1.How can I place an order for 77043012A through Aetrix?
Please submit a Request for Quotation (RFQ) for 77043012A 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 77043012A reliable?
The price and inventory of 77043012A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 77043012A is usually 5 days.
3.What payment methods are accepted for 77043012A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 77043012A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 77043012A?
77043012A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 77043012A 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 77043012A?
For technical support, including 77043012A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 77043012A requirements.
6.How does Aetrix verify that 77043012A is sourced from the original manufacturer or authorized distributors?
All 77043012A 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 77043012A meets industry standards.
7.What is the process for return or replacement of 77043012A?
All 77043012A units undergo pre-shipment inspection (PSI). If there is an issue with 77043012A, 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 77043012A part is unused and in its original packaging.
Return procedure for 77043012A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
77043012A Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
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LM2904DGKR
Texas Instruments
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LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
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
-
LM358P
Texas Instruments
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