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Texas Instruments LF156H/NOPB
- Part No.:
- LF156H/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- TO-99-8 Metal Can
- Datasheet:
-
LF156H/NOPB.pdf
- Description:
- IC OPAMP JFET 1 CIRCUIT TO99-8
- Quantity:
- Payment:
- Shipping:
Inventory:485
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Product details
Overview
LF156H/NOPB from Texas Instruments is a JFET-input operational amplifier optimized for precision, high-speed analog signal conditioning in industrial and test equipment. It delivers 12 V/µs slew rate, 5 MHz gain bandwidth, 1.5 µs settling time to 0.01%, 12 nV/√Hz input voltage noise at 1 kHz, and 30 pA typical input bias current - enabling accurate buffering and amplification of high-impedance sensor signals in data acquisition systems.
For engineers reviewing the LF156H/NOPB datasheet, LF156H/NOPB pinout, LF156H/NOPB application, or LF156H/NOPB equivalent, key selection considerations include its BI-FET™ architecture enabling low 1/f noise corner, large differential input voltage tolerance (±40 V), rail-to-rail common-mode input range up to V+, and internal compensation supporting stable operation with 5000 pF capacitive loads.
Technical Context
The LF156H/NOPB integrates matched high-voltage JFETs with bipolar transistors on a single die (BI-FET™ Technology), delivering low input bias current without sacrificing speed or noise performance. Its input stage avoids clamping diodes, allowing ±40 V differential input voltage and common-mode input up to V+ + 100 mV - critical for supply monitoring and high-side current sensing.
Offset adjustment is implemented via external resistors on pins 1 and 5, with no degradation to drift or CMRR - a design distinction from conventional monolithic op amps. The output stage drives large capacitive loads (up to 5000 pF) without external compensation, enabled by internal frequency compensation and robust phase margin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Slew Rate | 12 V/µs - enables fast transient response in D/A converters and active filters |
| Gain Bandwidth Product | 5 MHz - supports stable closed-loop gain ≥10 at 500 kHz |
| Settling Time (0.01%) | 1.5 µs - meets timing requirements for 12-bit ADC drivers and sample-and-hold circuits |
| Input Voltage Noise | 12 nV/√Hz @ 1 kHz - ensures low-noise amplification of thermocouple and strain gauge signals |
| Input Bias Current | 30 pA (typ) - preserves signal integrity in pH probes, photodiode, and piezoelectric sensor interfaces |
| Common-Mode Input Range | V– to V+ + 100 mV - allows direct connection to positive supply rail for current-sense applications |
| Differential Input Voltage | ±40 V - eliminates need for external input protection in industrial I/O modules |
Pinout & Package
LF156H/NOPB is supplied in an 8-pin SOIC package (body size 4.90 mm × 3.91 mm) with standard dual-in-line pin spacing and gull-wing leads compatible with automated PCB assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BALANCE (1, 5) | Offset null control | External potentiometer connection to trim input offset voltage without affecting drift or CMRR |
| +INPUT (3) | Noninverting input | High-impedance JFET gate node (10¹² Ω) for precision voltage sensing |
| –INPUT (2) | Inverting input | High-impedance JFET gate node; used for feedback configuration and current-to-voltage conversion |
| NC (8) | No connection | Internally unconnected; must remain floating per TI design specification |
| OUTPUT (6) | Amplifier output | Capable of driving ≥2 kΩ load with full swing (±12 V) and stable into 5000 pF |
| V+ (7) | Positive supply | Accepts ±15 V nominal; absolute max ±22 V; powers both JFET and bipolar sections |
| V– (4) | Negative supply | Accepts ±15 V nominal; absolute max ±22 V; input voltages must not fall below this rail |
Key Features
| Feature | Design Value |
|---|---|
| Rugged JFET input stage | Withstands ESD up to ±1000 V (HBM); no input blow-out during handling or board insertion |
| Low 1/f noise corner | Enables stable DC-coupled amplification of low-frequency sensor outputs (e.g., accelerometers, RTDs) |
| Large capacitive load drive | Stable operation with up to 5000 pF output capacitance - eliminates need for isolation resistors in DAC buffer stages |
| Offset adjust without performance penalty | Pin 1/5 nulling preserves 5 μV/°C typical TCVOS and 100 dB CMRR - unlike conventional trimmed op amps |
| Wide common-mode input range | Operates with inputs at V+ (or V+ + 100 mV), enabling high-side current sensing without level-shifting circuitry |
Applications
| High-Impedance Sensor Buffering | Precision Current Monitoring |
|---|---|
|
Use Scenario: Amplifying output of pH electrodes, photodiodes, or piezoelectric sensors with source impedances >1 MΩ. IC Role / Device Role / Timing Role: High-input-impedance voltage follower minimizing loading error and preserving signal fidelity. Use Value: 30 pA input bias current prevents significant voltage drop across high-Z sources; 12 nV/√Hz noise maintains SNR in sub-mV signal chains. |
Use Scenario: Measuring load current in industrial power supplies by amplifying voltage across a shunt resistor. IC Role / Device Role / Timing Role: Differential amplifier configured for high common-mode rejection of supply ripple. Use Value: Common-mode input range extending to V+ + 100 mV allows direct sensing on high-side shunts; 100 dB CMRR rejects switching noise. |
| Fast D/A Converter Output Stage | Logarithmic Amplifier for Wide-Dynamic-Range Signals |
|
Use Scenario: Driving 8-bit or 12-bit DAC outputs into analog back-end circuitry requiring fast settling and low distortion. IC Role / Device Role / Timing Role: Unity-gain buffer with 1.5 µs 0.01% settling time ensuring monotonic step response. Use Value: 12 V/µs slew rate and 5 MHz GBW prevent slewing-induced nonlinearity; internal compensation avoids layout-sensitive stability fixes. |
Use Scenario: Converting wide-dynamic-range photocurrent (100 μA–1 mA) into linear voltage output for optical power measurement. IC Role / Device Role / Timing Role: Transimpedance amplifier with exponential feedback for logarithmic compression. Use Value: Low input bias current (30 pA) minimizes dark-current error; low 1/f corner ensures accuracy down to 1 Hz modulation frequencies. |
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 |
|---|---|---|---|
| LF356N | Same core architecture but rated for 0°C to +70°C only; higher max input offset voltage (13 mV vs. 7 mV) | Limited to commercial-grade instrumentation; unsuitable for extended temperature industrial environments | Select LF156H/NOPB for operation from –55°C to +125°C and tighter initial VOS spec |
| TLC27L6 | CMOS input (not JFET); lower supply current (1.4 mA vs. 5–7 mA) but higher input voltage noise (25 nV/√Hz) | Better for battery-powered low-power systems; inferior noise performance in precision analog front-ends | Choose LF156H/NOPB when low 1/f noise, high slew rate, and rugged input are required over ultra-low power |
Compared with LF356N and TLC27L6, the LF156H/NOPB provides superior temperature range, lower noise, and higher slew rate - making it the preferred choice for military, aerospace, and high-reliability industrial signal conditioning where precision and robustness are non-negotiable.
Availability
LF156H/NOPB is available at Aetrix Electronics and suitable for precision instrumentation, industrial process control, and test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LF156H/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 specializing in analog and embedded processing technologies, with decades of heritage in precision op amp design and manufacturing.
The LF156H/NOPB belongs to TI's legacy LFx5x JFET-input op amp family, engineered specifically for high-speed, low-noise, wide common-mode applications in demanding industrial, military, and aerospace systems.
FAQ
What is the operating temperature range of the LF156H/NOPB?
The LF156H/NOPB is specified for operation from –55°C to +125°C, making it suitable for harsh-environment applications including avionics, downhole oilfield tools, and industrial motor drives. This extended range exceeds that of commercial variants like the LF356N (0°C to +70°C) and is validated per MIL-PRF-38535 Class H screening requirements.
Does the LF156H/NOPB require external compensation for stability?
No, the LF156H/NOPB features internal frequency compensation and is unity-gain stable. It maintains phase margin >45° even when driving up to 5000 pF capacitive loads - eliminating the need for external compensation networks in DAC buffers, active filters, or cable drivers.
How does the offset nulling circuit affect drift and common-mode rejection in the LF156H/NOPB?
Unlike conventional op amps, the LF156H/NOPB's offset nulling via pins 1 and 5 does not degrade drift or common-mode rejection ratio (CMRR). The BI-FET™ architecture isolates trimming from the input transistor matching network, preserving 5 μV/°C typical TCVO and 100 dB CMRR after adjustment.
Can the LF156H/NOPB be used with single-supply configurations?
The LF156H/NOPB is designed for dual-supply operation (±15 V typical) and does not support true single-supply use. Its input common-mode range extends to V+ but not to ground, and output swing is asymmetric around mid-rail. For single-supply applications, consider rail-to-rail op amps such as the TLV2462.
What is the maximum differential input voltage the LF156H/NOPB can withstand?
The LF156H/NOPB supports a maximum differential input voltage of ±40 V, independent of supply voltage. This is enabled by high-breakdown JFET input devices that eliminate the need for external clamping diodes - a key advantage in industrial I/O protection and high-voltage sensor interfacing.
LF156H/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- BI-FET™
- Package/Case:
- TO-99-8 Metal Can
- Packaging:
- Bulk
- 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):
- 10 V
- Voltage - Supply Span (Max):
- 44 V
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-99-8
LF156H/NOPB FAQ
1.How can I place an order for LF156H/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LF156H/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 LF156H/NOPB reliable?
The price and inventory of LF156H/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LF156H/NOPB is usually 5 days.
3.What payment methods are accepted for LF156H/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LF156H/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LF156H/NOPB?
LF156H/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LF156H/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 LF156H/NOPB?
For technical support, including LF156H/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LF156H/NOPB requirements.
6.How does Aetrix verify that LF156H/NOPB is sourced from the original manufacturer or authorized distributors?
All LF156H/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 LF156H/NOPB meets industry standards.
7.What is the process for return or replacement of LF156H/NOPB?
All LF156H/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LF156H/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 LF156H/NOPB part is unused and in its original packaging.
Return procedure for LF156H/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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