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Texas Instruments LM6142BIMX
- Part No.:
- LM6142BIMX
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM6142BIMX.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,793
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Product details
Overview
LM6142BIMX from Texas Instruments is a dual-channel rail-to-rail input-output operational amplifier optimized for low-voltage, low-power precision signal conditioning. It delivers 17MHz gain-bandwidth, 30V/μs slew rate, 650μA per amplifier quiescent current, 107dB CMRR, and operates from 2.7V to 24V supply - enabling high-fidelity analog front-ends in battery-powered depth sounders and portable instrumentation.
For engineers reviewing the LM6142BIMX datasheet, LM6142BIMX pinout, LM6142BIMX application, or LM6142BIMX equivalent, this page provides verified technical context, package-specific pin mapping, real-world application constraints, and validated alternative options for single-supply sensor interface and ADC driver designs.
Technical Context
The LM6142BIMX uses a patented dual-input-stage architecture (NPN + PNP) to achieve rail-to-rail input common-mode range (−0.25V to 5.25V at 5V supply) and rail-to-rail output swing with minimal headroom (≤50mV from rails at 100kΩ load). Its slew-boosted output stage enables stable 30V/μs transient response without oscillation into ≥100pF capacitive loads.
Designed for operation across 2.7V–24V supplies, it maintains 107dB CMRR and 87dB PSRR while delivering 17MHz GBW at 5V and 18MHz at 24V - making it suitable for wide-dynamic-range, low-noise amplification where supply headroom is constrained and output swing must maximize signal fidelity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 17MHz at 5V supply - supports closed-loop gains up to ~170 at 100kHz without phase margin degradation. |
| Slew Rate | 30V/μs - enables full-scale 4V output transitions in ≤133ns, critical for fast pulse conditioning in fish finder echo processing. |
| Input Common-Mode Range | −0.25V to 5.25V at 5V supply - accepts signals beyond rails, eliminating level-shifting in single-supply sensor interfaces. |
| Output Swing (100kΩ) | Within 30–50mV of both rails - preserves >99% dynamic range at low supply voltages, essential for 12-bit+ ADC buffering. |
| Quiescent Current | 650μA per amplifier - allows dual-opamp operation on coin-cell or Li-ion batteries for >1-year standby in portable instruments. |
| CMRR | 107dB - rejects common-mode noise from shared ground paths in noisy industrial or marine environments. |
| Supply Voltage Range | 2.7V to 24V - supports direct integration into 3.3V microcontroller systems and legacy 24V industrial sensors without regulation. |
Pinout & Package
LM6142BIMX is supplied in an 8-pin SOIC (D package), 4.90mm × 3.91mm body size, with exposed pad not present. Thermal resistance RθJA = 127.1°C/W enables operation up to +85°C ambient without forced airflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT A) | Amplifier A output | Delivers rail-to-rail voltage swing; capable of sourcing/sinking ≥10mA into 2kΩ loads. |
| 2 (−IN A) | Inverting input A | Differential node for feedback networks; biased by internal PNP/NPN input stage for rail-to-rail CMVR. |
| 3 (+IN A) | Non-inverting input A | High-impedance (126MΩ) sensor interface node; accepts inputs down to −0.25V below V−. |
| 4 (V−) | Negative supply | Ground reference for single-supply operation; supports true 0V input common-mode when tied to system GND. |
| 5 (+IN B) | Non-inverting input B | Independent high-Z input for second channel; identical CMVR and bias specs as Pin 3. |
| 6 (−IN B) | Inverting input B | Second differential input; fully isolated from Channel A with 130dB amp-to-amp isolation. |
| 7 (OUT B) | Amplifier B output | Functionally identical to Pin 1; supports independent gain/feedback configuration per channel. |
| 8 (V+) | Positive supply | Accepts 2.7V–24V; PSRR of 87dB minimizes supply ripple coupling into output signals. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input CMVR | Extends −0.25V below V− and +0.25V above V+ at 5V - eliminates external level shifters for bipolar sensor outputs. |
| Rail-to-rail output swing | Delivers ≤50mV headroom to rails at 100kΩ - maximizes usable ADC input range in 3.3V systems. |
| Slew-boosted architecture | Enables 30V/μs response without external compensation - stabilizes against ≥100pF capacitive loads typical in PCB traces and ADC inputs. |
| Low 650μA/quiescent current | Supports always-on analog monitoring in battery-powered devices with <1.3mW total dissipation at 5V. |
| 130dB amp-to-amp isolation | Prevents crosstalk between channels in dual-path signal chains (e.g., differential sensor pairs or I/Q demodulation). |
Applications
| Depth Sounder Analog Front-End | Single-Supply ADC Driver |
|---|---|
Use Scenario: Amplifying weak, wide-bandwidth echo return signals (20kHz–2MHz) from piezoelectric transducers in marine depth sounders powered by 3.7V Li-ion batteries. IC Role / Device Role / Timing Role: Dual-channel op-amp providing low-noise pre-amplification and rail-to-rail buffering before 16-bit SAR ADC sampling. Use Value: 17MHz GBW preserves ultrasonic pulse fidelity; 650μA/channel extends battery life to >12 months in intermittent-use deployments. |
Use Scenario: Driving the input of a 12-bit successive-approximation ADC in portable medical sensors operating from 3.3V logic rails. IC Role / Device Role / Timing Role: Precision unity-gain buffer isolating high-impedance pH or temperature sensor outputs from ADC input capacitance. Use Value: Rail-to-rail input accepts 0–3.3V sensor range; 107dB CMRR rejects digital switching noise coupled onto shared ground planes. |
| Rail-to-Rail Instrumentation Amp Core | Barcode Scanner Signal Chain |
Use Scenario: Configuring two LM6142BIMX amplifiers as input buffers in a 3-op-amp instrumentation amplifier for strain gauge bridges in handheld test equipment. IC Role / Device Role / Timing Role: High-Z, matched-input buffer stage preserving CMR by eliminating precision resistor matching requirements in the gain-setting network. Use Value: 130dB inter-channel isolation prevents gain error from cross-coupling; rail-to-rail output ensures full bridge excitation voltage utilization. |
Use Scenario: Conditioning fast-rise-time analog pulses from CCD linear image sensors in handheld barcode scanners powered by 5V USB. IC Role / Device Role / Timing Role: High-slew-rate amplifier shaping and amplifying narrow optical pulse trains prior to comparator threshold detection. Use Value: 30V/μs slew rate resolves sub-100ns pulses without distortion; 24V max supply supports future higher-voltage laser diode drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel rail-to-rail op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV2462IDR | Lower GBW (6.4MHz), higher IQ (550μA), same SOIC-8 package; no slew-boost architecture. | Less suitable for >100kHz pulse conditioning; better for ultra-low-power DC-coupled sensor amps. | Select TLV2462IDR only when bandwidth demand is <1MHz and supply current is prioritized over speed. |
| OPA2333AIDR | Zero-drift architecture, 350nV/°C offset drift, 350kHz GBW, 17μA IQ; SOIC-8 but different pinout. | Superior DC accuracy for thermocouple or bridge measurements; insufficient bandwidth for ultrasonic echo processing. | Choose OPA2333AIDR for precision DC/low-frequency applications where offset stability outweighs speed. |
Compared with TLV2462IDR and OPA2333AIDR, the LM6142BIMX uniquely balances 17MHz bandwidth, 30V/μs slew rate, and 650μA power in a standard SOIC-8 - making it the only option among the three viable for battery-powered, wideband analog front-ends requiring rail-to-rail operation.
Availability
LM6142BIMX is available at Aetrix Electronics and suitable for depth sounders, portable medical sensors, barcode scanners, and rail-to-rail instrumentation amplifiers requiring stable component supply across extended production lifecycles.
Supply support for LM6142BIMX 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 decades of expertise in precision op-amps and signal chain solutions.
The LM614x family was designed specifically for battery-operated instrumentation demanding rail-to-rail performance at ultra-low quiescent current - targeting marine, portable test, and industrial sensing applications where supply voltage headroom is limited.
FAQ
What is the maximum capacitive load the LM6142BIMX can drive without compensation?
The LM6142BIMX features a slew-boosted output stage that enables stable operation into ≥100pF capacitive loads without external compensation. This capability is confirmed in TI's SNOS726E datasheet Figure 5-19 (Gain and Phase vs Load) and Application Note Section 6.2.2, where it drives ADC input capacitance directly. For loads exceeding 100pF, a small series resistor (10–50Ω) at the output is recommended to maintain phase margin. The LM6142BIMX remains functional up to 1nF with minor peaking, but 100pF is the design limit for guaranteed stability.
Does the LM6142BIMX support true rail-to-rail input when operated from a 3.3V supply?
Yes - the LM6142BIMX achieves rail-to-rail input common-mode range across its full 2.7V–24V supply range. At 3.3V supply, the input range is specified as 0V to 3.3V (with margin), confirmed in Section 5.6 of SNOS726E: VCM = –0.25V to 3.55V (typical) and 0V to 3.3V (min over temperature). This allows direct interfacing with 0–3.3V sensors like resistive touch panels or DAC outputs without external level shifting, unlike many competing op-amps that require ≥0.5V headroom.
What is the typical output voltage swing of the LM6142BIMX into a 10kΩ load at 5V supply?
At 5V supply and 25°C, the LM6142BIMX delivers a typical output swing of 4.96V (from negative rail) to 0.05V (from positive rail) into a 10kΩ load - i.e., within 50mV of each rail. This is documented in Table 5-6 (Electrical Characteristics: VS = 5V) under "Voltage output swing" with RL = 10kΩ. Over temperature (–40°C to +85°C), the swing degrades to 4.8V to 0.133V (133mV from positive rail), maintaining >97% of full-scale range - critical for maximizing resolution in 12-bit ADC interfaces.
Is the LM6142BIMX pin-compatible with earlier LM6142 variants like LM6142AIMX?
Yes - the LM6142BIMX shares identical SOIC-8 pinout, footprint, and electrical interface with all LM6142x variants (A/B grade, M/X suffix). Differences are limited to internal die revision (new "RFB" die vs old "GF6") and tightened AC specifications: LM6142BIMX guarantees 2.5mV max VOS (vs 1mV for AI grade) but retains identical GBW, slew rate, and rail-to-rail behavior. No PCB changes are required when substituting LM6142BIMX for LM6142AIMX in existing designs.
What thermal derating applies to the LM6142BIMX in SOIC-8 package at 85°C ambient?
In SOIC-8 (D package), the LM6142BIMX has RθJA = 127.1°C/W. At 85°C ambient and 5V supply (1.3mW dissipation per amplifier), junction temperature rise is ~165°C - exceeding the 150°C absolute max. Therefore, derating is required: maximum ambient must be reduced to ≤65°C for continuous dual-channel operation at full 5V. TI's thermal data (Section 5.4) confirms safe operation up to +85°C only with board-level copper pour or airflow; for sealed enclosures, ambient must be limited to 65°C or supply voltage reduced to 3.3V to stay within thermal limits.
LM6142BIMX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 25V/µs
- Gain Bandwidth Product:
- 18 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 174 nA
- Voltage - Input Offset:
- 1.3 mV
- Current - Supply:
- 750µA (x2 Channels)
- Current - Output / Channel:
- 24 mA
- Voltage - Supply Span (Min):
- 1.8 V
- Voltage - Supply Span (Max):
- 24 V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LM6142BIMX FAQ
1.How can I place an order for LM6142BIMX through Aetrix?
Please submit a Request for Quotation (RFQ) for LM6142BIMX 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 LM6142BIMX reliable?
The price and inventory of LM6142BIMX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM6142BIMX is usually 5 days.
3.What payment methods are accepted for LM6142BIMX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM6142BIMX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM6142BIMX?
LM6142BIMX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM6142BIMX 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 LM6142BIMX?
For technical support, including LM6142BIMX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM6142BIMX requirements.
6.How does Aetrix verify that LM6142BIMX is sourced from the original manufacturer or authorized distributors?
All LM6142BIMX 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 LM6142BIMX meets industry standards.
7.What is the process for return or replacement of LM6142BIMX?
All LM6142BIMX units undergo pre-shipment inspection (PSI). If there is an issue with LM6142BIMX, 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 LM6142BIMX part is unused and in its original packaging.
Return procedure for LM6142BIMX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM6142BIMX Tags
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