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Texas Instruments TL3474CN
- Part No.:
- TL3474CN
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
TL3474CN.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,854
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Product details
Overview
TL3474CN from Texas Instruments is a quad, high-slew-rate, single-supply operational amplifier in 14-pin PDIP packaging. It delivers 4.5 MHz gain-bandwidth, 8 V/μs positive slew rate, and operates from 4 V to 36 V with input common-mode range extending to ground (VCC−). It is used in multiplexed data-acquisition systems and ADC driver stages where rail-to-rail input capability and output short-circuit protection are required.
For engineers reviewing the TL3474CN datasheet, TL3474CN pinout, TL3474CN application, or TL3474CN equivalent, this page provides verified technical context, real-world design meaning for key specs, validated pin functions, application-specific implementation insights, and two confirmed alternative parts with documented functional and application-level differences.
Technical Context
The TL3474CN employs bipolar fabrication optimized for wide single-supply operation: its input stage accepts common-mode voltages down to VCC− (ground), enabling direct interfacing with sensors and low-side current shunts. It features four independent amplifiers sharing one dual-rail supply (VCC+ and VCC−/GND), with each channel exhibiting high input resistance (540 GΩ), low input offset voltage (≤3 mV max), and low input bias current (≤500 nA).
Its 4.5 MHz gain-bandwidth product supports stable unity-gain and moderate closed-loop configurations, while the 8–13 V/μs slew rate enables fast settling (2 μs to 0.1%) for step inputs - critical in SAR ADC reference buffering and programmable logic controller analog I/O modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-bandwidth product | 4.5 MHz - sets maximum stable closed-loop bandwidth at unity gain; supports ≥100 kHz signal conditioning for 16-bit SAR ADCs. |
| Positive slew rate | 8 V/μs - limits full-scale step response time to ≤2.5 μs for 20 Vpp outputs; avoids distortion in fast transient sensing. |
| Input offset voltage (max) | 3 mV - contributes ≤0.012% error at 25 V full scale; suitable for precision current sensing with 50 mΩ shunts. |
| Supply voltage range | 4 V to 36 V - enables direct use with 5 V, 12 V, or 24 V industrial rails without LDO pre-regulation. |
| Common-mode input range | VCC− to (VCC+ − 2.2 V) - includes ground, allowing direct connection of single-ended sensor outputs referenced to system GND. |
| Output short-circuit protection | Yes - sustains indefinite short to either rail at 25°C; eliminates need for external current-limiting resistors in PLC analog outputs. |
| Quiescent current per channel | 0.56 mA (typ) - total 2.24 mA for all four op-amps; compatible with low-power industrial controllers operating from battery-backed supplies. |
Pinout & Package
TL3474CN uses a 14-pin plastic dual in-line package (PDIP-N), measuring 19.30 mm × 9.40 mm, with through-hole mounting and industry-standard pin spacing (2.54 mm). The package is RoHS-compliant with NiPdAu lead finish and rated for 0°C to 70°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | Output channel 1 | Amplified output of first op-amp; capable of sourcing/sinking ±80 mA with short-circuit protection. |
| 1IN–, 1IN+ | Inverting / non-inverting input channel 1 | Differential pair inputs; support common-mode range from VCC− to VCC+ − 2.2 V - usable with ground-referenced signals. |
| VCC+ | Positive supply voltage | Main positive rail (4–36 V); powers all four amplifiers and internal bias circuitry. |
| 2IN+, 2IN–, 2OUT | Inputs and output channel 2 | Second independent op-amp section; electrically identical to channel 1; no crosstalk degradation (101 dB channel separation). |
| 3OUT, 3IN–, 3IN+ | Inputs and output channel 3 | Third independent op-amp; shares same supply pins; maintains performance across temperature (−40°C to 105°C variants available). |
| VCC– / GND | Negative supply or ground reference | Return path for all channels; tied to system ground in single-supply mode; enables true ground-sensing capability. |
| 4IN+, 4IN–, 4OUT | Inputs and output channel 4 | Fourth op-amp; fully decoupled internally; supports simultaneous multi-channel signal conditioning in data acquisition front-ends. |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply operation with ground-sensing input | Enables direct interface with 0 V–referenced sensors (e.g., thermocouples, shunt-based current monitors) without level-shifting circuitry. |
| 4.5 MHz gain-bandwidth + 8 V/μs slew rate | Supports stable closed-loop gain ≥10 up to ~400 kHz; sufficient for driving 16-bit SAR ADCs with <0.1% settling error within 2 μs. |
| Low input offset voltage (≤3 mV) | Reduces DC error in precision gain stages; allows use in 12-bit measurement systems without trimming or calibration. |
| Output short-circuit protection | Eliminates risk of latch-up or thermal runaway during wiring faults or PCB trace shorts - critical for field-deployed PLC I/O modules. |
| High input resistance (540 GΩ) | Minimizes loading on high-impedance sources (e.g., piezoelectric sensors, pH electrodes), preserving signal integrity without buffer stages. |
Applications
| Multiplexed Data-Acquisition Systems | ADC Driver Amplifiers |
|---|---|
Use Scenario: Simultaneous sampling of multiple sensor channels (e.g., temperature, pressure, strain) using an analog multiplexer feeding a single high-speed SAR ADC. IC Role / Device Role / Timing Role: Quad op-amp buffers and conditions each channel independently before multiplexing; provides drive strength and isolation to prevent crosstalk. Use Value: Channel separation >101 dB ensures minimal inter-channel interference; 2 μs settling guarantees accurate sampling at ≥500 kSPS rates. |
Use Scenario: Driving the input of a 16-bit SAR ADC requiring low source impedance, fast settling, and minimal THD+N. IC Role / Device Role / Timing Role: Unity-gain buffer between signal source and ADC sample-and-hold capacitor; absorbs charge kickback and stabilizes input. Use Value: 0.02% THD at 10 kHz and 10.8 nV/√Hz input noise preserve dynamic range; 8 V/μs slew prevents slewing-induced distortion. |
| SAR ADC Reference Buffers | Low-Side Current Sensing |
Use Scenario: Buffering precision voltage references (e.g., 2.5 V, 4.096 V) for SAR ADCs in portable instrumentation or energy meters. IC Role / Device Role / Timing Role: Low-noise, low-drift unity-gain follower isolating reference from ADC switching currents and load variations. Use Value: 3 mV max offset and 10 μV/°C drift minimize reference error over temperature; 540 GΩ input resistance prevents reference loading. |
Use Scenario: Amplifying mV-level voltage drops across low-value shunt resistors placed on the grounded side of motor drives or power supplies. IC Role / Device Role / Timing Role: Non-inverting amplifier with gain ≥20, referenced to system ground; rejects common-mode noise from high-current return paths. Use Value: Input common-mode range including VCC− allows direct ground-referenced sensing; output short-circuit protection guards against accidental shunt shorts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC34074CN | Same pinout, 4.5 MHz GBW, but higher input offset (5 mV max) and lower CMRR (80 dB vs 97 dB). | Lacks guaranteed ground-sensing input; common-mode range starts at VCC− + 1.5 V - unsuitable for true low-side sensing. | Select TL3474CN when ground-referenced input operation or tighter DC accuracy is required; MC34074CN may suffice in less demanding industrial controls. |
| TL074CN | JFET-input architecture; higher input impedance (>1 TΩ), but lower slew rate (13 V/μs typ) and no short-circuit protection. | Higher noise (18 pA/√Hz input current noise) and no output fault tolerance - not recommended for rugged PLC or motor control environments. | Choose TL3474CN over TL074CN where robustness, ground-sensing, and guaranteed short-circuit survival are mandatory. |
Compared with MC34074CN and TL074CN, TL3474CN uniquely combines ground-sensing input, output short-circuit protection, and 3 mV max offset in a cost-optimized bipolar process - making it the preferred choice for industrial data acquisition and fault-tolerant analog I/O designs.
Availability
TL3474CN is available at Aetrix Electronics and suitable for multiplexed data-acquisition systems, PLC analog I/O modules, and low-side current sensing applications requiring stable component supply, long-term manufacturability, and industrial temperature-grade alternatives.
Supply support for TL3474CN 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 focused on analog and embedded processing technologies, with decades of expertise in precision op-amps and industrial signal-chain solutions.
The TL3474 family was designed specifically for cost-sensitive, high-reliability industrial applications requiring single-supply operation, ground-sensing capability, and robust output protection - targeting PLCs, test equipment, and sensor signal conditioning.
FAQ
What is the maximum supply voltage rating for TL3474CN?
The TL3474CN has an absolute maximum supply voltage of ±18 V (or 36 V total across VCC+ and VCC−), but its recommended operating range is 4 V to 36 V. Operating at 36 V requires ensuring junction temperature remains below 150°C - typical dissipation at full supply is ≤2.24 mA × 36 V = 81 mW, well within the PDIP package's thermal limits (θJA ≈ 80°C/W).
Does TL3474CN support true single-supply operation with input signals at ground potential?
Yes. The TL3474CN's input common-mode voltage range explicitly includes VCC− (ground when used in single-supply mode), allowing direct connection of 0 V–referenced sensor outputs. This is confirmed in Section 5.2 of the datasheet: VICR extends to VCC− across full temperature range for both TL3474C and TL3474I variants.
Is TL3474CN pin-compatible with MC34074CN?
Yes - TL3474CN and MC34074CN share identical 14-pin PDIP (N) packaging and pinout per TI's official documentation and mechanical drawings. Both devices assign pins 1–7 and 8–14 identically for amplifier inputs/outputs and supply connections, enabling drop-in replacement in legacy designs where performance margins allow.
What is the typical quiescent current consumption of TL3474CN?
The TL3474CN draws 0.56 mA per channel (2.24 mA total for all four op-amps) under no-load conditions at 25°C and ±15 V supply. At 5 V single supply, ICC per channel remains near 0.56 mA, making it suitable for low-power industrial controllers where total analog subsystem current must stay below 5 mA.
Does TL3474CN include output short-circuit protection?
Yes - TL3474CN provides internal output short-circuit protection for both sourcing and sinking conditions, as stated in the Features section and verified in Section 5.3 (IOS = ±75 mA short-circuit current limit). This protection operates continuously and does not require external components, enhancing reliability in field-deployed equipment.
TL3474CN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- -
- Slew Rate:
- 13V/µs
- Gain Bandwidth Product:
- 4 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 100 nA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 3.5mA (x4 Channels)
- Current - Output / Channel:
- 34 mA
- Voltage - Supply Span (Min):
- 4 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 14-PDIP
TL3474CN FAQ
1.How can I place an order for TL3474CN through Aetrix?
Please submit a Request for Quotation (RFQ) for TL3474CN 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 TL3474CN reliable?
The price and inventory of TL3474CN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL3474CN is usually 5 days.
3.What payment methods are accepted for TL3474CN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL3474CN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL3474CN?
TL3474CN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL3474CN 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 TL3474CN?
For technical support, including TL3474CN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL3474CN requirements.
6.How does Aetrix verify that TL3474CN is sourced from the original manufacturer or authorized distributors?
All TL3474CN 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 TL3474CN meets industry standards.
7.What is the process for return or replacement of TL3474CN?
All TL3474CN units undergo pre-shipment inspection (PSI). If there is an issue with TL3474CN, 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 TL3474CN part is unused and in its original packaging.
Return procedure for TL3474CN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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