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Texas Instruments LF353P
- Part No.:
- LF353P
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LF353P.pdf
- Description:
- IC OPAMP JFET 2 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,956
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Product details
Overview
LF353P from Texas Instruments is a dual JFET-input operational amplifier optimized for high-speed, low-input-bias-current applications. It delivers 3 MHz gain-bandwidth, 13 V/µs slew rate, and 50 pA typical input bias current, enabling precision signal conditioning in motor control feedback loops and pro audio mixer stages.
For engineers reviewing the LF353P datasheet, LF353P pinout, LF353P application, or LF353P equivalent, key selection criteria include dual-channel JFET input architecture, ±15 V dual-supply operation, PDIP-8 package thermal resistance (55.1 °C/W), and guaranteed 0°C to 70°C industrial temperature range performance.
Technical Context
The LF353P integrates two independent JFET-input op-amps on a single monolithic die, each featuring high-impedance inputs (10¹² Ω), bipolar output stages with 200 Ω series protection, and internally trimmed offset voltage. Its architecture supports both single- and dual-supply configurations while maintaining low noise (0.01 pA/√Hz input noise current) and wide common-mode range (±12 V at ±15 V supplies).
Functional operation relies on matched JFET differential pairs for low IIB and IIO, combined with Class AB output buffering for fast transient response. The device exhibits 120 dB crosstalk attenuation at 1 kHz and maintains stable unity-gain operation without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth | 3 MHz typical - enables stable closed-loop operation up to 300 kHz with gain of 10 |
| Slew Rate | 13 V/µs typical - supports clean amplification of 100 kHz sine waves at ±10 V output swing |
| Input Bias Current | 50 pA typical at 25°C - permits use of >1 MΩ feedback resistors without significant DC error |
| Input Impedance | 10¹² Ω typical - minimizes loading on high-impedance sensors and piezoelectric transducers |
| Common-Mode Range | –12 V to +11 V at ±15 V supply - allows rail-to-rail input handling near positive rail but not negative rail |
| Supply Current | 3.6 mA typical - enables dual-amplifier operation within 100 mW total power budget at ±15 V |
| Operating Temperature | 0°C to 70°C - qualified for industrial-grade embedded systems without derating |
Pinout & Package
LF353P uses an 8-pin plastic dual in-line package (PDIP) with 9.81 mm × 6.35 mm body size and through-hole mounting. Thermal resistance is 55.1 °C/W (junction-to-ambient), supporting continuous operation at full rated load in natural convection environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | Output of Amplifier 1 | Low-impedance buffered output capable of ±13.5 V swing into 10 kΩ load |
| 1IN– | Inverting Input of Amplifier 1 | Differential input node with 10¹² Ω impedance and ±12 V common-mode range |
| 1IN+ | Noninverting Input of Amplifier 1 | Differential input node matching 1IN– characteristics; upper common-mode limit extends to VCC+ – 4 V |
| VCC– | Negative Supply Rail | Reference for internal biasing; supports –18 V absolute maximum rating |
| 2IN+ | Noninverting Input of Amplifier 2 | Electrically isolated from Amplifier 1; identical specs enable independent channel operation |
| 2IN– | Inverting Input of Amplifier 2 | Matches 1IN– performance; 120 dB crosstalk attenuation prevents inter-channel interference |
| 2OUT | Output of Amplifier 2 | Independent output stage with same 200 Ω series protection as 1OUT |
| VCC+ | Positive Supply Rail | Supports up to +18 V absolute maximum; recommended operating range is +3.5 V to +18 V |
Key Features
| Feature | Design Value |
|---|---|
| Low Input Bias Current | 50 pA typical enables high-Z sensor interfacing without guard-ring PCB layout |
| JFET Input Stage | Monolithic JFET pair provides 10¹² Ω input resistance and <10 µV/°C offset drift |
| Internally Trimmed Offset | 10 mV max input offset voltage eliminates need for external nulling circuitry |
| Short-Circuit Protected Output | 200 Ω series resistor limits fault current to <75 mA at ±15 V, preventing latch-up |
| Dual-Supply Flexibility | Operates from ±3.5 V to ±18 V or single 7 V to 36 V supply - simplifies mixed-signal system power design |
Applications
| Motor Control Feedback | Pro Audio Signal Routing |
|---|---|
Use Scenario: Closed-loop speed regulation in AC inverter drives using hall-effect rotor position sensing. IC Role / Device Role / Timing Role: Dual-channel signal conditioner: one amplifier buffers position sensor output; second performs error amplification in PI controller loop. Use Value: 50 pA input bias current prevents DC drift in 100 kΩ feedback networks, maintaining ±0.5% speed accuracy over temperature. | Use Scenario: Channel summing and level adjustment in analog mixing consoles before ADC conversion. IC Role / Device Role / Timing Role: Dual op-amp performing non-inverting gain staging (×2) and inverting summing of four input channels. Use Value: 13 V/µs slew rate preserves transient fidelity of 20 kHz audio signals with <0.01% THD+N at 10 Vpp output. |
| Oscilloscope Vertical Amplifier | Solar Inverter Voltage Sensing |
Use Scenario: High-impedance probe interface and vertical deflection driver in benchtop oscilloscopes. IC Role / Device Role / Timing Role: First-stage buffer for 10× passive probes followed by gain-controlled amplifier driving CRT deflection plates. Use Value: 10¹² Ω input impedance prevents probe capacitance loading, maintaining >100 MHz bandwidth at probe tip. | Use Scenario: Isolated DC-link voltage monitoring in photovoltaic string inverters using resistive divider networks. IC Role / Device Role / Timing Role: High-side voltage follower feeding isolated sigma-delta ADC reference input. Use Value: ±12 V common-mode input range accommodates 600 V DC-link sensing with 1:1200 divider, eliminating level-shifting circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual JFET-input op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL072CP | Lower 10 pA input bias current, higher 4 MHz GBW, but 16 V max supply vs LF353P's 18 V | Better for low-noise audio preamps; less suitable for high-voltage industrial sensing | Select TL072CP when lower IIB and higher speed are critical, and supply stays ≤±16 V |
| CA3140EZ | CMOS input (0.05 pA IIB), rail-to-rail input, but only 4.5 MHz GBW and no internal trimming | Preferred for ultra-high-Z biomedical sensors; requires external offset nulling | Choose CA3140EZ for sub-picoampere bias-critical designs where external trim is acceptable |
Compared with TL072CP and CA3140EZ, the LF353P offers the best balance of high-voltage tolerance (±18 V), robust internal offset trimming, and proven reliability in motor drive feedback paths-making it the preferred choice for cost-sensitive industrial control applications requiring guaranteed 0°C to 70°C operation.
Availability
LF353P is available at Aetrix Electronics and suitable for motor control systems, pro audio equipment, test instrumentation, and solar inverter designs requiring stable component supply across extended production cycles.
Supply support for LF353P 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 90 years of innovation in precision analog ICs.
The LF353P belongs to TI's legacy JFET-input op-amp product line, engineered for industrial-grade reliability in high-impedance, medium-speed signal conditioning applications including motor drives and test equipment.
FAQ
What is the maximum supply voltage rating for the LF353P?
The LF353P has an absolute maximum supply voltage rating of ±18 V across VCC+ and VCC– pins. Operation beyond this limit risks permanent damage. Recommended operating range is ±3.5 V to ±18 V per the datasheet's Recommended Operating Conditions table. The LF353P must never be subjected to differential supply voltages exceeding 36 V, even momentarily.
Does the LF353P support single-supply operation?
Yes, the LF353P supports true single-supply operation from 7 V to 36 V. When used in single-supply mode, the negative supply pin (VCC–) connects to ground, and input common-mode range extends from 4 V above ground to 4 V below VCC+. This configuration is validated in TI's Application and Implementation section and commonly deployed in battery-powered instrumentation.
What is the input offset voltage specification for the LF353P?
The LF353P features internally trimmed input offset voltage with a typical value of 5 mV and a maximum of 13 mV across the full 0°C to 70°C operating temperature range. This specification is measured under standard conditions (VCC± = ±15 V, RS = 10 kΩ) and eliminates the need for external nulling components in most precision applications.
How does the LF353P handle output short circuits?
The LF353P incorporates built-in short-circuit protection via a 200 Ω series resistor in each output path. This limits peak fault current to approximately 75 mA at ±15 V supply, preventing thermal runaway and enabling indefinite short-circuit survival without damage. The protection is inherent to the silicon design and requires no external components.
Is the LF353P pin-compatible with other dual op-amps in PDIP-8 packages?
The LF353P follows the industry-standard dual op-amp pinout (1OUT, 1IN–, 1IN+, VCC–, 2IN+, 2IN–, 2OUT, VCC+) defined in JEDEC MS-001. It is pin-compatible with TL072CP, NE5532P, and CA3140EZ in PDIP-8 packages, allowing direct substitution in existing layouts where electrical specifications align with the application requirements.
LF353P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- J-FET
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 13V/µs
- Gain Bandwidth Product:
- 3 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 50 pA
- Voltage - Input Offset:
- 5 mV
- Current - Supply:
- 3.6mA (x2 Channels)
- Current - Output / Channel:
- 40 mA
- Voltage - Supply Span (Min):
- 7 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
LF353P FAQ
1.How can I place an order for LF353P through Aetrix?
Please submit a Request for Quotation (RFQ) for LF353P 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 LF353P reliable?
The price and inventory of LF353P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LF353P is usually 5 days.
3.What payment methods are accepted for LF353P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LF353P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LF353P?
LF353P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LF353P 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 LF353P?
For technical support, including LF353P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LF353P requirements.
6.How does Aetrix verify that LF353P is sourced from the original manufacturer or authorized distributors?
All LF353P 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 LF353P meets industry standards.
7.What is the process for return or replacement of LF353P?
All LF353P units undergo pre-shipment inspection (PSI). If there is an issue with LF353P, 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 LF353P part is unused and in its original packaging.
Return procedure for LF353P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LF353P Tags
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LM358DT
STMicroelectronics
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LM358DR
Texas Instruments
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LM2904DR
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LM358ADR
Texas Instruments
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LM2904DGKR
Texas Instruments
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LM324DR
Texas Instruments
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MCP6006T-E/OT
Microchip Technology
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MCP6006UT-E/OT
Microchip Technology
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LM324PWR
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LM2902PWR
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LM2902DR
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LM358P
Texas Instruments
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