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Texas Instruments TL322IP
- Part No.:
- TL322IP
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
TL322IP.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:24,760
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Product details
Overview
TL322IP from Texas Instruments is a dual general-purpose operational amplifier with true differential input stage, Class AB output stage, and internal frequency compensation. It operates from single supply (5 V to 30 V) or dual supplies (±2.5 V to ±15 V), delivers ±10 V peak output swing into 2 kΩ at ±15 V, features 1 MHz unity-gain bandwidth, and supports industrial temperature range (−40°C to +85°C). It is used in precision sensor signal conditioning and analog front-end circuits where rail-to-rail input common-mode range down to VCC− is required.
For engineers reviewing the TL322IP datasheet, TL322IP pinout, TL322IP application, or TL322IP equivalent, key selection considerations include its 8 mV max input offset voltage at 25°C, −0.5 µA typical input bias current, 70–90 dB CMRR, short-circuit protection, and compatibility with legacy uA741-based designs requiring extended temperature operation.
Technical Context
The TL322IP implements a classic bipolar-input op-amp architecture with a true differential pair input stage and Class AB push-pull output stage. Its internal 5 pF compensation capacitor ensures stable unity-gain operation without external components across all recommended supply conditions.
It supports wide-supply flexibility: single-ended operation from 5 V to 30 V (GND referenced), or split supplies where |VCC+ − VCC−| ranges from 5 V to 30 V. The common-mode input range extends to the negative supply rail, and output swings from VCC− to VCC+ − 1.5 V under load - enabling robust interfacing with microcontroller ADCs and analog sensors in industrial control systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | Single: 5 V to 30 V; Dual: ±2.5 V to ±15 V - enables direct use in battery-powered and industrial 24 V systems without level-shifting. |
| Input Offset Voltage (max) | 8 mV at 25°C - sets baseline DC error for precision gain stages and active filters. |
| Unity-Gain Bandwidth | 1 MHz - supports stable closed-loop operation up to ~100 kHz with moderate gain (e.g., G = 10). |
| Output Swing (RL = 2 kΩ) | ±10 V at ±15 V supplies - provides >6.6 VPP headroom for driving 12-bit SAR ADC references or comparator thresholds. |
| Common-Mode Input Range | Includes VCC− - allows direct sensing of ground-referenced transducer outputs without biasing networks. |
| Phase Margin | 60° - guarantees stable step response with ≤20% overshoot in unity-gain follower configurations. |
| Short-Circuit Protection | Yes - limits output current to ±45 mA, preventing latch-up or thermal runaway during fault conditions. |
Pinout & Package
TL322IP is housed in an 8-pin plastic dual in-line package (PDIP), compliant with JEDEC MS-001. The package is through-hole mountable, with 0.3-inch lead spacing and standard DIP footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | 1OUT | Amplifier A output - drives external load or feedback network; capable of ±10 V swing into 2 kΩ. |
| 2 | 1IN− | Inverting input of Amp A - high-impedance node (0.3 MΩ typical); connects to feedback resistor or summing junction. |
| 3 | 1IN+ | Non-inverting input of Amp A - same impedance as Pin 2; accepts DC-biased or AC-coupled sensor signals. |
| 4 | VCC− / GND | Negative supply or ground reference - common return for both amplifiers; must be low-impedance. |
| 5 | 2IN+ | Non-inverting input of Amp B - electrically isolated from Amp A; shares same supply rails. |
| 6 | 2IN− | Inverting input of Amp B - independent high-Z node; supports dual-channel instrumentation or differential receiver topologies. |
| 7 | 2OUT | Amplifier B output - fully independent output stage; usable for dual-sensor conditioning or active filtering. |
| 8 | VCC+ | Positive supply - powers both amplifiers; decoupling capacitor (0.1 µF) recommended adjacent to Pin 8. |
Key Features
| Feature | Design Value |
|---|---|
| True differential input stage | Enables balanced signal acquisition with 70–90 dB CMRR, rejecting noise on shared supply or ground paths. |
| Class AB output stage | Delivers low crossover distortion (<1%) and ±45 mA short-circuit current, supporting drive into capacitive loads up to 200 pF. |
| Internal frequency compensation | Guarantees stability without external compensation components across all gain configurations and supply voltages. |
| Low input bias current | −0.5 µA typical at 25°C - minimizes voltage error across high-value feedback resistors (>100 kΩ) in precision integrators. |
| Wide temperature range support | Specified from −40°C to +85°C - suitable for uncontrolled industrial enclosures and outdoor sensor nodes. |
Applications
| Industrial Sensor Signal Conditioning | Legacy System Analog Upgrade |
|---|---|
|
Use Scenario: Amplifying low-level outputs from RTDs, strain gauges, or thermocouples in PLC I/O modules operating at 24 V DC with ambient temperatures up to 70°C. IC Role / Device Role / Timing Role: Dual-channel DC-coupled instrumentation amplifier front-end, providing gain, offset correction, and drive capability for 12-bit ADC inputs. Use Value: Input common-mode range extending to VCC− eliminates need for input biasing networks, reducing component count and thermal drift in multi-sensor systems. |
Use Scenario: Replacing obsolete uA741-based op-amps in field-deployed test equipment where extended temperature range and lower quiescent current are required. IC Role / Device Role / Timing Role: Drop-in functional replacement for dual-op-amp sections in analog power supply monitors and waveform generators. Use Value: Halved quiescent current per amplifier (~1.4 mA vs. ~2.8 mA for uA741) extends battery life in portable calibration tools without sacrificing bandwidth or output drive. |
| DC Motor Current Sensing | Audio Pre-Amplification Stage |
|
Use Scenario: Bidirectional current sensing across shunt resistors in 12–24 V brushed DC motor controllers, with output fed to microcontroller ADC. IC Role / Device Role / Timing Role: High-side and low-side current sense amplifier with rail-to-rail input capability and internal protection against load dump transients. Use Value: Short-circuit protection and ±30 V differential input rating allow safe operation during motor stall or wiring faults without external clamping diodes. |
Use Scenario: Low-noise pre-amplification of line-level audio signals in industrial HMIs and diagnostic equipment with minimal external components. IC Role / Device Role / Timing Role: Dual-channel non-inverting gain stage (G = 10–100) with unity-gain stable design and 60° phase margin for clean transient response. Use Value: 1 MHz bandwidth and <1% crossover distortion preserve audio fidelity up to 20 kHz while maintaining stability with typical 10 kΩ source impedances. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL072CP | JFET-input architecture; 3 MHz GBW; 65 V/µs slew rate; higher input impedance (1012 Ω); no short-circuit protection. | Better for high-source-impedance photodiode amps or high-frequency active filters; unsuitable for direct shunt-current sensing due to lack of fault tolerance. | Select TL072CP only when ultra-low input bias current (<30 pA) and higher speed are prioritized over ruggedness and rail-to-rail input capability. |
| LM358N | Bipolar input; 700 kHz GBW; 0.3 V/µs slew rate; wider supply range (3–32 V); no phase margin guarantee; lower cost. | Preferred for cost-sensitive consumer-grade analog stages where bandwidth <100 kHz suffices and industrial temp range is not required. | Choose LM358N for commercial-temp applications with tight BOM budgets; avoid where −40°C startup or precise DC accuracy is mandatory. |
Compared with TL072CP and LM358N, the TL322IP uniquely balances industrial temperature operation, short-circuit protection, rail-to-rail input capability, and proven uA741-compatible behavior - making it the preferred choice for upgrading legacy analog subsystems in harsh environments without redesigning PCB layout or feedback networks.
Availability
TL322IP is available at Aetrix Electronics and suitable for industrial sensor interfaces, legacy system upgrades, and DC motor control circuits requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TL322IP 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, embedded processing, and digital signal technologies, with decades of experience in high-reliability industrial and automotive ICs.
The TL322IP belongs to TI's legacy bipolar op-amp product line, designed specifically for robust, drop-in replacement of uA741-family devices in industrial control, test equipment, and sensor interface applications demanding extended temperature performance and fault resilience.
FAQ
What is the maximum operating temperature range for the TL322IP?
The TL322IP is characterized for operation from −40°C to +85°C. This industrial temperature grade enables reliable deployment in uncontrolled environments such as factory floors, outdoor enclosures, and vehicle-mounted control units - unlike the commercial-grade TL322CP (0°C to 70°C). All electrical specifications in the datasheet for TL322IP are guaranteed across this full range, including input offset voltage, CMRR, and output swing.
Does the TL322IP support single-supply operation?
Yes, the TL322IP supports true single-supply operation from 5 V to 30 V with VCC− connected to ground. Its common-mode input range includes the negative rail (GND), and output swings from GND to VCC+ − 1.5 V - allowing direct interfacing with microcontroller ADCs and comparators without level-shifting circuitry. This capability is confirmed in the "Recommended Operating Conditions" and "Electrical Characteristics" tables of the SLOS086 datasheet.
What is the input offset voltage specification for TL322IP at room temperature?
The TL322IP has a maximum input offset voltage of 8 mV at 25°C, with a typical value of 2 mV. This parameter is measured under open-loop conditions with RS = 50 Ω and is guaranteed across the full industrial temperature range (−40°C to +85°C) up to 12 mV. The low offset supports accurate DC-coupled amplification in precision sensor signal chains where cumulative error must remain below 0.1% of full-scale.
Is the TL322IP pin-compatible with the uA741?
No, the TL322IP is not pin-compatible with the uA741. While both are dual op-amps, the TL322IP uses an 8-pin PDIP configuration with dedicated VCC+ (Pin 8) and VCC−/GND (Pin 4), whereas the uA741 is a single op-amp in 8-pin DIP with VCC+ (Pin 7) and VCC− (Pin 4). However, each amplifier section within TL322IP is functionally compatible with uA741 performance - making it suitable for board-level redesigns that consolidate two uA741s into one TL322IP with appropriate pin remapping.
Does TL322IP include internal frequency compensation?
Yes, the TL322IP includes internal 5 pF frequency compensation, as shown in the schematic diagram in the SLOS086 datasheet. This allows stable unity-gain operation without external compensation components across its entire specified supply voltage range (±2.5 V to ±15 V or 5 V to 30 V) and load conditions (up to 2 kΩ). The guaranteed 60° phase margin confirms unconditional stability in follower and low-gain configurations.
TL322IP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 0.6V/µs
- Gain Bandwidth Product:
- 1 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 200 nA
- Voltage - Input Offset:
- 2 mV
- Current - Supply:
- 1.4mA (x2 Channels)
- Current - Output / Channel:
- 10 mA
- Voltage - Supply Span (Min):
- 5 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
TL322IP FAQ
1.How can I place an order for TL322IP through Aetrix?
Please submit a Request for Quotation (RFQ) for TL322IP 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 TL322IP reliable?
The price and inventory of TL322IP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL322IP is usually 5 days.
3.What payment methods are accepted for TL322IP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL322IP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL322IP?
TL322IP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL322IP 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 TL322IP?
For technical support, including TL322IP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL322IP requirements.
6.How does Aetrix verify that TL322IP is sourced from the original manufacturer or authorized distributors?
All TL322IP 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 TL322IP meets industry standards.
7.What is the process for return or replacement of TL322IP?
All TL322IP units undergo pre-shipment inspection (PSI). If there is an issue with TL322IP, 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 TL322IP part is unused and in its original packaging.
Return procedure for TL322IP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL322IP Tags
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LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
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LM2904DR
Texas Instruments
-
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
Texas Instruments
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LM2902PWR
Texas Instruments
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LM2902DR
Texas Instruments
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LM358P
Texas Instruments
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