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Texas Instruments TL322CP
- Part No.:
- TL322CP
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
TL322CP.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:88,000
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Product details
Overview
TL322CP from Texas Instruments is a dual operational amplifier with true differential input stage, Class AB output stage, and internal frequency compensation-designed for single-supply operation from 5 V to 30 V or dual supplies of ±2.5 V to ±15 V. It delivers ±10 V peak output swing (RL = 2 kΩ), 1 MHz unity-gain bandwidth, and 70–90 dB common-mode rejection ratio, enabling use in precision DC-coupled signal conditioning circuits.
For engineers reviewing the TL322CP datasheet, TL322CP pinout, TL322CP application, or TL322CP equivalent, key selection criteria include input offset voltage (≤10 mV at 25°C), low input bias current (−0.2 µA typ), rail-to-rail-compatible input range (includes negative supply), and robust short-circuit protection-critical for industrial sensor interfaces and legacy analog systems requiring uA741-class performance with lower quiescent current.
Technical Context
The TL322CP implements a classic bipolar-input op-amp architecture with a true differential pair front-end and Class AB push-pull output stage, supporting operation down to the negative supply rail. Its internal 5 pF compensation capacitor ensures stable unity-gain operation without external components.
It features wide common-mode input voltage range (VCC− to VCC+ − 2 V) and output swing from VCC− to VCC+ − 1.5 V under load-enabling direct interfacing with microcontroller ADCs and single-supply data acquisition stages without level-shifting circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | Single: 5 V to 30 V; Dual: ±2.5 V to ±15 V - supports legacy 5 V, 12 V, and 24 V industrial rails. |
| Input Offset Voltage | 2–10 mV (25°C) - enables accurate DC amplification in sensor front-ends without trimming. |
| Unity-Gain Bandwidth | 1 MHz - sufficient for audio-band and medium-speed control loop applications. |
| Output Swing | VCC− to VCC+ − 1.5 V (RL = 2 kΩ) - delivers usable dynamic range near ground in single-supply configurations. |
| CMRR | 70–90 dB - rejects power supply and shared-noise coupling in multi-channel systems. |
| Slew Rate | 0.6 V/µs - limits large-signal distortion in pulse-amplifier and comparator-buffer roles. |
| Quiescent Current | 1.4–4 mA total (per amplifier <2 mA) - reduces thermal load vs. uA741 in battery-adjacent or thermally constrained designs. |
Pinout & Package
TL322CP is housed in an 8-pin plastic dual in-line package (PDIP), compliant with JEDEC MS-001. The package provides through-hole mounting compatibility and standard 0.3-inch DIP footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | 1OUT | Amplifier 1 output - drives loads up to ±30 mA short-circuit current with thermal foldback. |
| 2 | 1IN− | Inverting input - high-impedance node (0.3–1 MΩ) for feedback network connection. |
| 3 | 1IN+ | Non-inverting input - accepts common-mode signals down to VCC− (rail-to-rail input capability). |
| 4 | VCC− / GND | Negative supply or ground reference - serves as return path for both amplifiers and bias circuitry. |
| 5 | 2IN+ | Non-inverting input (Amplifier 2) - electrically isolated but shares bias network with Amp 1. |
| 6 | 2IN− | Inverting input (Amplifier 2) - identical electrical characteristics to Pin 2. |
| 7 | 2OUT | Amplifier 2 output - independently buffered; crosstalk attenuation ≥120 dB at 1–20 kHz. |
| 8 | VCC+ | Positive supply - supports up to 30 V single-supply or +15 V dual-supply operation. |
Key Features
| Feature | Design Value |
|---|---|
| True differential input stage | Enables balanced signal handling and high CMRR without external resistor matching. |
| Class AB output stage | Reduces crossover distortion to ≤1% at 10 kHz, improving fidelity in AC-coupled audio paths. |
| Internal frequency compensation | Guarantees stability at unity gain without external capacitor-simplifies PCB layout. |
| Short-circuit protection | Limits output current to ±45 mA max, preventing latch-up or thermal runaway during fault conditions. |
| Low input bias current | −0.2 µA typical at 25°C - minimizes voltage error across high-impedance sensor sources (e.g., pH electrodes). |
Applications
| Industrial Sensor Signal Conditioning | Legacy System Analog Front-End |
|---|---|
|
Use Scenario: Amplifying low-level outputs from RTDs, strain gauges, or thermocouples in PLC I/O modules operating from 24 V DC rails. IC Role / Device Role / Timing Role: Precision DC-coupled instrumentation amplifier core (configured as non-inverting or difference amplifier). Use Value: Input offset voltage ≤10 mV and CMRR ≥70 dB ensure sub-0.5% measurement error over temperature without calibration. |
Use Scenario: Replacing aging uA741-based circuits in medical equipment power supply monitors and ECG front-ends where board space and BOM count are fixed. IC Role / Device Role / Timing Role: Drop-in functional upgrade with identical pinout and improved supply current (≤4 mA vs. uA741's ~8 mA). Use Value: Same 8-pin PDIP footprint and compatible gain-bandwidth product enable retrofit without layout change. |
| Single-Supply Data Acquisition | Audio Line Driver |
|
Use Scenario: Buffering and level-shifting sensor outputs to match 0–3.3 V or 0–5 V ADC inputs in embedded controllers powered by 5 V or 12 V rails. IC Role / Device Role / Timing Role: Rail-referenced voltage follower or gain stage with input range extending to VCC− (GND). Use Value: Output swing to within 1.5 V of VCC+ allows >3 VPP headroom at 5 V supply-sufficient for 12-bit ADC full-scale drive. |
Use Scenario: Driving 600 Ω professional audio lines from microcontroller DAC outputs in studio mixer auxiliary send paths. IC Role / Device Role / Timing Role: Low-distortion unity-gain buffer with 120 dB crosstalk isolation between dual channels. Use Value: ≤1% crossover distortion at 10 kHz and 120 dB channel separation prevent intermodulation in stereo summing applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM358N | Higher input offset voltage (up to 7 mV), no guaranteed spec for VIO at full temperature range; lower CMRR (65 dB min). | Widely used in cost-sensitive consumer electronics; less suitable for precision industrial sensing. | Prefer TL322CP when input offset drift (<10 µV/°C) and CMRR >70 dB are required across 0°C–70°C. |
| TL072CP | JFET-input architecture: lower input bias current (±30 pA), higher GBP (3 MHz), but requires ±4 V minimum dual supply. | Better for high-impedance photodiode amps or high-frequency filters; incompatible with 5 V single-supply systems. | Choose TL322CP for single-supply operation down to 5 V and bipolar-input robustness in noisy industrial environments. |
Compared with LM358N and TL072CP, the TL322CP uniquely balances single-supply flexibility (5–30 V), rail-to-rail input capability, and uA741-compatible performance-making it optimal for retrofitting legacy analog subsystems where supply constraints and precision coexist.
Availability
TL322CP is available at Aetrix Electronics and suitable for industrial sensor interfaces, legacy system upgrades, and single-supply data acquisition requiring stable component supply and long-term obsolescence management.
Supply support for TL322CP 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 company headquartered in Dallas, Texas, specializing in analog, embedded processing, and digital signal technologies since 1930.
The TL322 series was developed as a bipolar dual op-amp family optimized for industrial and instrumentation applications demanding reliable single-supply operation, low power, and direct uA741 replacement capability.
FAQ
What is the maximum supply voltage rating for TL322CP?
The TL322CP has an absolute maximum supply voltage rating of ±18 V (VCC+ ≤ 18 V, VCC− ≥ −18 V) or 36 V total across VCC+ and VCC−. Operation beyond these limits risks permanent damage. Recommended operating range is 5 V to 30 V single supply or ±2.5 V to ±15 V dual supply per the datasheet.
Does TL322CP support rail-to-rail input and output operation?
The TL322CP supports rail-to-rail input: its common-mode input voltage range extends to VCC− (ground in single-supply mode). However, output swing is limited to VCC− to VCC+ − 1.5 V under load-so it does not achieve true rail-to-rail output. This behavior is confirmed in the "Peak output voltage swing" specification (±10 V at ±15 V supplies).
Is TL322CP pin-compatible with the uA741?
No, TL322CP is not pin-compatible with the uA741. While both are dual op-amps, the uA741 is a single amplifier in an 8-pin package, whereas TL322CP integrates two independent amplifiers with a dedicated 8-pin DIP pinout (1OUT, 1IN−, 1IN+, VCC−, 2IN+, 2IN−, 2OUT, VCC+). Direct substitution requires circuit redesign.
What is the typical input bias current of TL322CP at 25°C?
The typical input bias current of TL322CP at 25°C is −0.2 µA, with a maximum of −0.8 µA over the full 0°C to 70°C operating range. This value is measured with VO = 0 V and reflects the bipolar input stage's base current draw-critical for minimizing error in high-source-impedance applications like thermocouple amplifiers.
Can TL322CP be used in single-supply 5 V applications?
Yes, TL322CP is explicitly characterized for single-supply operation down to 5 V. At VCC+ = 5 V and VCC− = 0 V, it delivers a peak output swing of 3.3 V (VCC+ − 1.7 V) with RL = 10 kΩ and maintains 20–200 V/mV large-signal gain-making it suitable for buffering 3.3 V microcontroller ADC inputs and sensor signal chains in compact embedded systems.
TL322CP 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 pA
- Voltage - Input Offset:
- 2 mV
- Current - Supply:
- 1.4mA (x2 Channels)
- Current - Output / Channel:
- 30 mA
- Voltage - Supply Span (Min):
- 5 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
TL322CP FAQ
1.How can I place an order for TL322CP through Aetrix?
Please submit a Request for Quotation (RFQ) for TL322CP 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 TL322CP reliable?
The price and inventory of TL322CP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL322CP is usually 5 days.
3.What payment methods are accepted for TL322CP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL322CP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL322CP?
TL322CP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL322CP 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 TL322CP?
For technical support, including TL322CP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL322CP requirements.
6.How does Aetrix verify that TL322CP is sourced from the original manufacturer or authorized distributors?
All TL322CP 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 TL322CP meets industry standards.
7.What is the process for return or replacement of TL322CP?
All TL322CP units undergo pre-shipment inspection (PSI). If there is an issue with TL322CP, 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 TL322CP part is unused and in its original packaging.
Return procedure for TL322CP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL322CP Tags
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LM358DT
STMicroelectronics
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LM358DR
Texas Instruments
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LM2904DR
Texas Instruments
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LM358ADR
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LM2904DGKR
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LM324DR
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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
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