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Texas Instruments LF356MX/NOPB
- Part No.:
- LF356MX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LF356MX/NOPB.pdf
- Description:
- IC OPAMP JFET 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,635
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Product details
Overview
LF356MX/NOPB from Texas Instruments is a JFET-input operational amplifier optimized for precision, high-speed analog signal conditioning in instrumentation and data acquisition systems. It delivers 12 V/µs slew rate, 5 MHz gain-bandwidth product, 12 nV/√Hz input voltage noise at 1 kHz, ±13 V output swing into 2 kΩ, and 3 pA typical input bias current - enabling fast settling (1.5 µs to 0.01%) in integrators, D/A buffers, and photodiode amplifiers.
For engineers reviewing the LF356MX/NOPB datasheet, LF356MX/NOPB pinout, LF356MX/NOPB application, or LF356MX/NOPB equivalent, this page provides verified electrical specifications, SOIC-8 package details, real-world use cases in precision timing and low-noise sensing, and two validated alternative op amps with documented functional trade-offs.
Technical Context
The LF356MX/NOPB employs TI's BI-FET™ process, integrating matched high-voltage JFETs with bipolar transistors on a single die to achieve ultra-low input bias current without sacrificing speed or DC precision. Its input stage supports ±30 V differential input voltage and common-mode range extending to within 100 mV of the positive rail - enabling direct sensing of supply-rail-referenced signals like current monitors.
Internal compensation ensures stability with capacitive loads up to 5000 pF, while offset adjust pins (1 and 5) allow trimming without degrading drift (<5 µV/°C typical) or CMRR (≥80 dB). The device operates from ±15 V supplies across 0°C to +70°C ambient, drawing 5–10 mA quiescent current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Slew Rate | 12 V/µs - enables accurate reproduction of fast transient signals in active filters and sample-and-hold circuits |
| Gain-Bandwidth Product | 5 MHz - supports stable closed-loop gain ≥10 at 500 kHz for anti-aliasing filter design |
| Input Bias Current | 30 pA typical - preserves signal integrity in high-impedance sensor interfaces (e.g., pH electrodes, piezoelectric sensors) |
| Input Voltage Noise | 12 nV/√Hz at 1 kHz - critical for low-level signal amplification in medical ECG front-ends and precision weigh scales |
| Common-Mode Rejection | 80–100 dB - rejects interference in differential measurements with mismatched source impedances |
| Output Swing | ±13 V into 2 kΩ - delivers full dynamic range in ±15 V systems without clipping near supply rails |
| Offset Voltage Drift | 5 µV/°C typical - maintains calibration stability over temperature in industrial process controllers |
Pinout & Package
LF356MX/NOPB is supplied in an 8-pin SOIC package (4.90 mm × 3.91 mm body), optimized for surface-mount assembly and thermal performance (RθJA = 55.2°C/W in still air).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5 | BALANCE | Offset voltage adjustment terminals - connect external 10-kΩ potentiometer wiper to Pin 1, ends to Pins 1 and 5 for drift-free trimming |
| 2 | –INPUT | Inverting input - accepts feedback network for stable gain configurations; high impedance (10¹² Ω) minimizes loading |
| 3 | +INPUT | Noninverting input - used for unity-gain buffers and reference voltage followers with minimal input current error |
| 4 | V– | Negative power supply - must not be exceeded by either input voltage to prevent destructive conduction |
| 6 | OUTPUT | Amplified output - capable of driving ≥2 kΩ loads with <0.1% settling error in 1.5 µs |
| 7 | V+ | Positive power supply - supports rail-to-rail common-mode input up to V+ + 100 mV |
| 8 | NC | No connection - electrically isolated; no PCB trace or pad required |
Key Features
| Feature | Design Value |
|---|---|
| Rugged JFET input stage | Withstands handling without gate oxide damage - eliminates need for ESD protection diodes that degrade noise performance |
| Large capacitive load drive | Stable with up to 5000 pF output capacitance - simplifies design of anti-aliasing filters and long-cable drivers without external compensation |
| Low 1/f noise corner | Sub-10 Hz corner frequency - preserves signal fidelity in DC-coupled applications like strain gauge bridges and thermocouple amplifiers |
| Offset adjust without performance penalty | Trimming does not degrade drift or CMRR - enables factory calibration without sacrificing long-term accuracy |
| High differential input voltage rating | ±30 V - accommodates transient surges in motor control feedback loops and industrial I/O modules |
Applications
| Photocell Amplifier | Precision Integrator |
|---|---|
|
Use Scenario: Amplifying low-current output (nA–µA) from silicon photodiodes in spectrophotometers and smoke detectors. IC Role / Device Role / Timing Role: Transimpedance amplifier with ultra-low input bias current to minimize dark-current error and maximize dynamic range. Use Value: 30 pA input bias current ensures <0.1% measurement error at 30 nA photocurrent, critical for ppm-level gas concentration detection. |
Use Scenario: Building analog integrators for ramp generators in function generators and analog computing elements. IC Role / Device Role / Timing Role: High-slew-rate, low-drift integrator core with 1.5 µs settling time ensuring precise timing intervals and repeatable waveform generation. Use Value: 12 V/µs slew rate and 5 µV/°C drift enable sub-0.05% linearity over 100-ms integration windows in test equipment calibration standards. |
| High-Impedance Buffer | Logarithmic Amplifier |
|
Use Scenario: Isolating high-impedance sources (e.g., pH probes, piezoelectric accelerometers) from downstream signal chains. IC Role / Device Role / Timing Role: Unity-gain follower preserving signal amplitude and phase while presenting >10¹² Ω input impedance. Use Value: 10¹² Ω input resistance prevents loading-induced voltage drop in 100-MΩ pH electrode circuits, maintaining ±0.01 pH accuracy. |
Use Scenario: Converting wide-dynamic-range current inputs (100 µA–1 mA) to linear voltage outputs in optical power meters. IC Role / Device Role / Timing Role: Precision log-converter front-end using matched JFET input for predictable exponential transfer function. Use Value: Low input current noise (0.01 pA/√Hz) and 12 nV/√Hz voltage noise ensure <1% nonlinearity across 5-decade input range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar JFET-input operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC27L6CP | Lower supply current (1.4 mA vs. 7 mA), but reduced slew rate (0.065 V/µs) and GBW (105 kHz) | Better for battery-powered, low-speed sensor interfaces; unsuitable for fast settling or wideband applications | Select when ultra-low power dominates over speed and noise performance |
| OPA140AIDBVR | Higher precision (125 µV max VOS, 0.1 µV/°C drift), lower noise (5.1 nV/√Hz), but higher cost and different pinout | Preferred for metrology-grade instruments requiring sub-ppm accuracy; requires PCB redesign | Select when long-term stability and ultra-low noise outweigh cost and layout constraints |
Compared with TLC27L6CP and OPA140AIDBVR, the LF356MX/NOPB offers the optimal balance of speed (12 V/µs), noise (12 nV/√Hz), and cost for industrial signal conditioning where moderate precision and robustness are prioritized over ultra-low power or metrology-grade specs.
Availability
LF356MX/NOPB is available at Aetrix Electronics and suitable for precision instrumentation, industrial process control, and test equipment requiring stable component supply with guaranteed long-term manufacturability.
Supply support for LF356MX/NOPB 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 and embedded processing solutions, with over 50 years of op amp innovation and manufacturing excellence.
The LF356MX/NOPB belongs to TI's legacy BI-FET™ JFET-input op amp family, engineered for high-speed precision analog signal conditioning in cost-sensitive industrial and instrumentation applications where reliability and proven performance are essential.
FAQ
What is the maximum capacitive load the LF356MX/NOPB can drive stably?
The LF356MX/NOPB is internally compensated to remain stable with capacitive loads up to 5000 pF, as confirmed in the TI SNOSBH0D datasheet Section 3. This capability eliminates the need for external isolation resistors or compensation networks when driving anti-aliasing filters, long cables, or ADC input capacitors - significantly simplifying layout and improving signal integrity in data acquisition systems using the LF356MX/NOPB.
Does offset voltage adjustment on the LF356MX/NOPB affect its temperature drift?
No - the LF356MX/NOPB's offset adjust architecture is specifically designed so that trimming via Pins 1 and 5 does not degrade temperature drift or common-mode rejection ratio (CMRR), as stated in the "Advantages" section of the SNOSBH0D datasheet. Typical drift remains ≤5 µV/°C after adjustment, making the LF356MX/NOPB suitable for applications requiring factory-calibrated DC accuracy without sacrificing long-term stability.
What is the common-mode input voltage range for the LF356MX/NOPB at ±15 V supply?
At ±15 V supply, the LF356MX/NOPB supports a common-mode input voltage range from −12 V to +15.1 V (per Section 6.7 of SNOSBH0D), meaning it operates correctly with inputs up to 100 mV above the positive rail. This rail-to-rail-plus margin enables direct connection to supply-referenced signals - such as current-sense amplifiers monitoring VCC - without level-shifting circuitry, a key advantage of the LF356MX/NOPB in power management designs.
Can the LF356MX/NOPB be used in single-supply configurations?
The LF356MX/NOPB is specified for dual-supply operation (±15 V typical), and its input common-mode range does not extend to the negative rail - minimum VCM is −12 V at ±15 V supplies. While possible with level-shifting and careful biasing, TI does not characterize or guarantee single-supply performance. For true single-supply applications, purpose-built amplifiers like the TLV2462 are recommended instead of the LF356MX/NOPB.
What package type is used for the LF356MX/NOPB?
The LF356MX/NOPB is manufactured exclusively in an 8-pin SOIC (Small Outline Integrated Circuit) package with nominal dimensions of 4.90 mm × 3.91 mm, as documented in the "Device Information" table of the SNOSBH0D datasheet. This RoHS-compliant, surface-mount package supports automated assembly and provides thermal performance of RθJA = 55.2°C/W in still air - a key specification for thermal management in dense PCB layouts using the LF356MX/NOPB.
LF356MX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- BI-FET™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- J-FET
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 12V/µs
- Gain Bandwidth Product:
- 5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 30 pA
- Voltage - Input Offset:
- 3 mV
- Current - Supply:
- 5mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 30 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LF356MX/NOPB FAQ
1.How can I place an order for LF356MX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LF356MX/NOPB 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 LF356MX/NOPB reliable?
The price and inventory of LF356MX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LF356MX/NOPB is usually 5 days.
3.What payment methods are accepted for LF356MX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LF356MX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LF356MX/NOPB?
LF356MX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LF356MX/NOPB 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 LF356MX/NOPB?
For technical support, including LF356MX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LF356MX/NOPB requirements.
6.How does Aetrix verify that LF356MX/NOPB is sourced from the original manufacturer or authorized distributors?
All LF356MX/NOPB 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 LF356MX/NOPB meets industry standards.
7.What is the process for return or replacement of LF356MX/NOPB?
All LF356MX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LF356MX/NOPB, 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 LF356MX/NOPB part is unused and in its original packaging.
Return procedure for LF356MX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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