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Texas Instruments LM6142BIMX-TI
- Part No.:
- LM6142BIMX-TI
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM6142BIMX-TI.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:86,900
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Product details
Overview
LM6142BIMX-TI from Texas Instruments (formerly National Semiconductor) is a dual rail-to-rail input-output operational amplifier optimized for low-voltage, low-power precision signal conditioning. It delivers 17 MHz gain-bandwidth, 5 V/µs small-signal slew rate, and 650 µA per amplifier supply current at 5 V, enabling high-fidelity analog front-ends in battery-powered instrumentation and portable sensing systems.
For engineers reviewing the LM6142BIMX-TI datasheet, LM6142BIMX-TI pinout, LM6142BIMX-TI application, or LM6142BIMX-TI equivalent, key selection criteria include its −0.25 V to 5.25 V input common-mode range, 0.005 V to 4.995 V output swing at 5 V supply, 107 dB CMRR, 87 dB PSRR, and guaranteed operation from −40 °C to +85 °C in the SOIC-8 package.
Technical Context
The LM6142BIMX-TI employs a patented bipolar input stage with phase-reversal prevention and dynamic slew-rate enhancement: input overdrive above two diode drops routes excess signal directly to current mirrors via auxiliary transistors (Q5/Q6), increasing slew rate up to 30 V/µs for large signals. This architecture eliminates phase reversal under overdrive and improves stability when driving capacitive loads.
Its rail-to-rail input extends 0.25 V beyond both rails, eliminating common-mode headroom constraints; rail-to-rail output delivers full dynamic range down to 1.8 V supply. The amplifier maintains 17 MHz GBW at 50 kHz test frequency and sustains stable unity-gain operation into 1000 pF capacitive loads without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 17 MHz at 50 kHz - enables high-speed closed-loop filtering and signal amplification up to ~1 MHz with moderate gain. |
| Slew Rate (Small Signal) | 5 V/µs - supports clean 100 kHz sine waves at 5 VPP without distortion in unity-gain buffer configurations. |
| Input Common-Mode Range | −0.25 V to 5.25 V at 5 V supply - accepts inputs below ground and above VCC, simplifying single-supply sensor interfacing. |
| Output Voltage Swing | 0.005 V to 4.995 V at RL = 100 kΩ - delivers >99.9% of rail-to-rail dynamic range, maximizing ADC utilization in 5 V systems. |
| Supply Current per Amplifier | 650 µA at 5 V - enables dual-channel precision amplification with <1.3 mA total quiescent current, extending battery life in portable devices. |
| CMRR | 107 dB - rejects common-mode noise from noisy power rails or shared grounds in mixed-signal PCB layouts. |
| PSRR | 87 dB - maintains DC accuracy and AC signal integrity despite supply ripple or switching regulator noise. |
Pinout & Package
LM6142BIMX-TI is housed in an 8-pin SOIC (Small Outline Integrated Circuit) surface-mount package (NS Package Number M08A), measuring 4.9 mm × 3.9 mm × 1.75 mm, with standard 1.27 mm pitch and gull-wing leads suitable for automated reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (−) | Differential input node accepting voltage referenced to non-inverting input; high-impedance (126 MΩ) bipolar input stage. |
| 2 | Non-Inverting Input (+) | Differential input node; supports common-mode voltages from −0.25 V to 5.25 V at 5 V supply. |
| 3 | Output A | Amplifier A output capable of sourcing/sinking ±25 mA; swings within 5 mV of rails at light load. |
| 4 | V− (Ground / Negative Supply) | Reference terminal for single-supply (0 V) or split-supply (e.g., −5 V) operation; must be low-impedance. |
| 5 | V+ (Positive Supply) | Power supply input supporting 1.8 V to 24 V; decoupling capacitor required near pin for stability. |
| 6 | Output B | Amplifier B output with identical rail-to-rail swing and drive capability as Output A. |
| 7 | Non-Inverting Input B (+) | Second amplifier's non-inverting input; electrically isolated from Channel A per datasheet isolation spec (130 dB). |
| 8 | Inverting Input B (−) | Second amplifier's inverting input; independent bias current path (170 nA typ) and offset voltage tracking. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input with extended CMVR | Accepts inputs 0.25 V beyond supply rails (−0.25 V to 5.25 V @ 5 V), eliminating level-shifting circuitry for ground-referenced sensors. |
| Dynamic slew-rate enhancement | Boosts slew rate from 5 V/µs (small signal) to 30 V/µs (large signal) via auxiliary input transistors, preventing phase reversal and improving transient response. |
| Capacitive load drive capability | Stable unity-gain operation into 1000 pF without external compensation-enables direct connection to ADC input capacitance or long PCB traces. |
| Low-power precision performance | 107 dB CMRR and 87 dB PSRR maintained at 650 µA supply current, enabling high-accuracy signal conditioning in energy-constrained designs. |
| Wide supply range | Operates from 1.8 V to 24 V, supporting both coin-cell–powered wearables (1.8–3.3 V) and industrial 24 V systems without redesign. |
Applications
| Battery-Powered Depth Sounders | Analog Front-End for Precision ADCs |
|---|---|
|
Use Scenario: Signal conditioning of echo-return pulses in portable fish finders powered by two AA cells (3 V). IC Role / Device Role / Timing Role: Dual-channel op amp configured as transimpedance amplifier (Channel A) and differential receiver (Channel B) for ultrasonic return signal amplification and noise rejection. Use Value: Rail-to-rail input captures weak sub-100 mV echoes near ground; 17 MHz GBW preserves pulse rise time; 650 µA quiescent current extends operating time beyond 20 hours per battery set. |
Use Scenario: Buffering and level-shifting sensor outputs (e.g., thermocouple, strain gauge) before 16-bit SAR ADC sampling. IC Role / Device Role / Timing Role: Precision unity-gain buffer isolating high-impedance sensor from ADC input capacitance while maintaining DC accuracy and AC bandwidth. Use Value: 107 dB CMRR rejects common-mode noise from shared ground paths; rail-to-rail output ensures full-scale ADC utilization; 1000 pF capacitive load drive eliminates need for external isolation resistors. |
| Rail-to-Rail Instrumentation Amplifiers | Wireless Sensor Node Signal Chains |
|
Use Scenario: Building 3-op-amp instrumentation amps for single-supply industrial sensors requiring >100 dB CMR and wide dynamic range. IC Role / Device Role / Timing Role: Two LM6142BIMX-TI amplifiers serve as input buffers (A & B), enabling true rail-to-rail input without precision resistor dividers that degrade CMR and input impedance. Use Value: Eliminates 5-resistor divider network, preserving >100 MΩ input impedance and avoiding resistor mismatch-induced CMR loss; output swing to within 5 mV of rails maximizes SNR in 3.3 V systems. |
Use Scenario: Analog signal preprocessing in BLE/Zigbee nodes with intermittent wake-up, where low quiescent current and fast wake-up settling are critical. IC Role / Device Role / Timing Role: Low-noise, low-power amplifier stage amplifying MEMS microphone or environmental sensor outputs prior to ADC sampling during active mode. Use Value: 650 µA per amplifier allows dual-channel signal conditioning within 1.3 mA total budget; 30 V/µs large-signal slew rate ensures <1 µs settling to 0.1% after wake-up; 16 nV/√Hz input voltage noise preserves signal fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV2462IDR | Lower GBW (6.4 MHz), higher supply current (550 µA per amp), no slew-rate enhancement; CMVR = 0 V to VCC−1.3 V. | Not suitable for sub-rail input signals or fast large-signal transients; better for cost-sensitive, lower-bandwidth sensor buffering. | Select TLV2462IDR only if GBW <7 MHz suffices and input signals stay within standard CMVR limits. |
| OPA2333AIDR | Zero-drift architecture (0.02 µV/°C offset drift), lower noise (5.5 nV/√Hz), but lower GBW (350 kHz) and higher supply current (17 µA per amp). | Preferred for ultra-stable DC-coupled measurement (e.g., medical ECG), not for AC-coupled or high-speed pulse applications. | Choose OPA2333AIDR when microvolt-level DC accuracy and drift dominate over speed and power; avoid for >100 kHz signal paths. |
Compared with TLV2462IDR and OPA2333AIDR, LM6142BIMX-TI uniquely balances 17 MHz bandwidth, rail-to-rail input extension, dynamic slew-rate boost, and sub-mA quiescent current-making it optimal for battery-powered, wide-dynamic-range analog front-ends where both speed and efficiency are mandatory.
Availability
LM6142BIMX-TI is available at Aetrix Electronics and suitable for battery-operated instrumentation, depth sounders/fish finders, and wireless communications systems requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for LM6142BIMX-TI 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 acquired National Semiconductor in 2011 and maintains its precision analog portfolio, delivering high-performance, industry-standard ICs with broad application support and long-term product commitments.
The LM6142BIMX-TI belongs to TI's legacy high-speed, low-power rail-to-rail op amp family, designed specifically for portable and single-supply instrumentation where input/output voltage range, bandwidth, and quiescent power must coexist without compromise.
FAQ
What is the operating temperature range for LM6142BIMX-TI?
The LM6142BIMX-TI is rated for industrial operation from −40 °C to +85 °C, as confirmed in the Absolute Maximum and Operating Ratings tables of the official datasheet. This range applies to the SOIC-8 package (M08A) and is validated across all electrical specifications including input offset voltage, CMRR, and gain-bandwidth product.
Does LM6142BIMX-TI support true rail-to-rail input, and how far beyond the rails does it extend?
Yes, LM6142BIMX-TI supports true rail-to-rail input with a common-mode voltage range of −0.25 V to 5.25 V at 5 V supply-extending 0.25 V below V− and 0.25 V above V+. This is explicitly specified in the "Rail-to-rail input CMVR" feature line and verified in the 5.0V DC Electrical Characteristics table under VCM parameter.
Can LM6142BIMX-TI drive a 1000 pF capacitive load without oscillation?
Yes, LM6142BIMX-TI is characterized to drive up to 1000 pF capacitive loads at unity gain without external compensation, as demonstrated in Application Ideas section Figure 3 and Figure 4. This capability stems from its dynamic slew-rate enhancement architecture, which increases phase margin under capacitive loading conditions.
What is the typical supply current per amplifier for LM6142BIMX-TI at 5 V?
The typical supply current per amplifier for LM6142BIMX-TI is 650 µA at 5 V, as stated in the Features list and confirmed in the 5.0V DC Electrical Characteristics table under IS parameter. Maximum supply current is 880 µA per amplifier across temperature and process variation.
Is LM6142BIMX-TI pin-compatible with other members of the LM6142/LM6144 family?
Yes, LM6142BIMX-TI shares identical pinout with all LM6142 variants in the SOIC-8 package (e.g., LM6142AIM, LM6142AIMX), including LM6142AIN in DIP-8. Pin compatibility is confirmed by the Connection Diagrams section showing identical top-view layouts for 8-pin DIP/SO packages across all LM6142 ordering options.
LM6142BIMX-TI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- 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:
- 22 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-TI FAQ
1.How can I place an order for LM6142BIMX-TI through Aetrix?
Please submit a Request for Quotation (RFQ) for LM6142BIMX-TI 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-TI reliable?
The price and inventory of LM6142BIMX-TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM6142BIMX-TI is usually 5 days.
3.What payment methods are accepted for LM6142BIMX-TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM6142BIMX-TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM6142BIMX-TI?
LM6142BIMX-TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM6142BIMX-TI 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-TI?
For technical support, including LM6142BIMX-TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM6142BIMX-TI requirements.
6.How does Aetrix verify that LM6142BIMX-TI is sourced from the original manufacturer or authorized distributors?
All LM6142BIMX-TI 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-TI meets industry standards.
7.What is the process for return or replacement of LM6142BIMX-TI?
All LM6142BIMX-TI units undergo pre-shipment inspection (PSI). If there is an issue with LM6142BIMX-TI, 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-TI part is unused and in its original packaging.
Return procedure for LM6142BIMX-TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM6142BIMX-TI Tags
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LM358DT
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LM358DR
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MCP6006UT-E/OT
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