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Texas Instruments UA747CN
- Part No.:
- UA747CN
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
UA747CN.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:992
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Product details
Overview
UA747CN from Texas Instruments is a dual general-purpose operational amplifier in 14-pin PDIP package, featuring ±15 V supply operation, ±12 V common-mode input range, 0.5 V/µs slew rate, and ±40 mA short-circuit output current - used in voltage-follower, active filter, and comparator circuits requiring latch-up immunity and internal frequency compensation.
For engineers reviewing the UA747CN datasheet, UA747CN pinout, UA747CN application, or UA747CN equivalent, this page delivers verified electrical parameters, validated dual-amplifier pin functions, real-world signal conditioning use cases, and TI-confirmed alternative op-amps with documented functional trade-offs.
Technical Context
The UA747CN integrates two independent high-input-impedance op-amps on a single die, each with internally compensated unity-gain-stable architecture and no external compensation required. Its dual ±15 V supply rails support rail-to-rail input common-mode range up to ±13 V and deliver 24 VPP output swing into 10 kΩ load.
Designed for industrial temperature range (0°C to 70°C), it features short-circuit protection with unlimited duration, no latch-up behavior, and 80 dB typical CMRR - enabling reliable use in motor control feedback loops and audio pre-amplifiers where input stage robustness is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | ±15 V - supports bipolar signal processing without level-shifting circuitry |
| Input Offset Voltage | ±0.3 mV (typ) - enables precision DC-coupled amplification with minimal nulling error |
| Common-Mode Input Range | ±12 V (full range) - allows direct interfacing with ±12 V sensor outputs or DACs |
| Slew Rate | 0.5 V/µs - sufficient for audio-band (<20 kHz) and low-speed control loop applications |
| Short-Circuit Output Current | ±40 mA - provides fault-tolerant drive capability into accidental shorts or capacitive loads |
| Supply Current per Amplifier | 0.35 mA (typ) - enables low-power dual-channel operation in battery-backed systems |
| Channel Separation | 120 dB - ensures minimal crosstalk between amplifiers in mixed-signal signal chains |
Pinout & Package
UA747CN uses a 14-pin Plastic Dual In-line Package (PDIP-N) measuring 19.3 mm × 9.4 mm, with through-hole mounting and NIPDAU lead finish. Pin 1 is located at the left end of the top row when viewed from top with notch or dot orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5 | Inverting Input (Amp 1 & Amp 2) | Differential input node for each amplifier; accepts signals referenced to ground or virtual ground |
| 2, 6 | Non-inverting Input (Amp 1 & Amp 2) | High-impedance input for positive feedback or reference biasing in follower configurations |
| 3, 7 | Output (Amp 1 & Amp 2) | Class-AB output stage capable of sourcing/sinking ±40 mA into shorted loads |
| 4 | VCC− (Negative Supply) | Common negative rail connection for both amplifiers; must be tied to system −15 V |
| 8, 11 | VCC+ (Positive Supply) | Internally connected positive supply pins; tie both to +15 V for stable dual-supply operation |
| 9, 10, 12, 13, 14 | No Internal Connection (NC) | Unbonded pins - must remain unconnected; no routing or grounding required |
Key Features
| Feature | Design Value |
|---|---|
| No external frequency compensation required | Unity-gain stable architecture eliminates need for external compensation capacitors, reducing BOM count and PCB area |
| Wide common-mode input voltage range | ±12 V full-range operation enables direct interface with ±10 V industrial sensors and legacy analog I/O modules |
| Short-circuit protected outputs | Unlimited short-circuit duration prevents thermal runaway during test, debug, or transient faults in motor driver feedback paths |
| No latch-up behavior | CMOS-free bipolar process ensures safe recovery after overvoltage transients on inputs or outputs |
| Low quiescent current | 0.35 mA per amplifier allows dual-channel operation in power-constrained instrumentation front-ends |
Applications
| Audio Pre-amplifier | Active Low-pass Filter |
|---|---|
|
Use Scenario: Boosting microphone-level signals (–60 dBV) before ADC sampling in embedded voice recorders. IC Role / Device Role / Timing Role: Dual-channel non-inverting amplifier (first stage) and second-order Sallen-Key filter (second stage). Use Value: ±12 V common-mode range accommodates DC-biased electret mic outputs; 120 dB channel separation prevents crosstalk between stereo channels. |
Use Scenario: Removing high-frequency noise from thermocouple or strain gauge sensor outputs prior to digitization. IC Role / Device Role / Timing Role: Dual op-amp configured as unity-gain buffer + 2-pole active RC filter with 100 Hz cutoff. Use Value: Internal compensation ensures stable 20 dB/decade roll-off without peaking; ±40 mA output drives 10 nF filter capacitors directly. |
| Voltage Comparator | Motor Control Feedback |
|
Use Scenario: Threshold detection for overvoltage protection in 12 V DC power supplies. IC Role / Device Role / Timing Role: Open-loop comparator using one amplifier section with hysteresis via resistor feedback. Use Value: No latch-up allows safe operation during input overdrive; ±30 V differential input rating tolerates transient spikes beyond supply rails. |
Use Scenario: Closed-loop speed regulation in brushed DC motor drivers using back-EMF sensing. IC Role / Device Role / Timing Role: Error amplifier in PID controller loop comparing tachometer voltage to reference. Use Value: 0.5 V/µs slew rate supports response times < 20 µs for 10 V step changes; short-circuit protection survives PWM-induced shoot-through events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual general-purpose op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM358N | Single-supply rated (3–32 V), lower input offset (±2 mV typ), no internal compensation for >100 kHz gain-bandwidth | Better suited for 5 V microcontroller-based sensor interfaces; not recommended for ±15 V bipolar signal chains | Select LM358N only when operating from single-ended supplies and bandwidth < 1 MHz is acceptable |
| TL072CP | JFET-input (lower IIB = 65 pA), higher slew rate (13 V/µs), requires external compensation above 10 kHz | Preferred for high-impedance source buffering (e.g., piezoelectric sensors); unsuitable for cost-sensitive industrial designs needing no-compensation simplicity | Choose TL072CP when ultra-low input bias current or wide bandwidth is mandatory; retain UA747CN for rugged, no-compensation stability |
Compared with LM358N and TL072CP, the UA747CN uniquely combines bipolar-input robustness, internal unity-gain compensation, and ±15 V operation - making it optimal for legacy industrial control systems where reliability under overvoltage stress and zero-layout redesign are design priorities.
Availability
UA747CN is available at Aetrix Electronics and suitable for audio pre-amplifiers, active filters, and voltage comparators requiring stable component supply across long-lifecycle industrial programs.
Supply support for UA747CN 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 connectivity technologies since 1930.
The UA747CN belongs to TI's legacy general-purpose op-amp product line, engineered for industrial-grade reliability, latch-up immunity, and drop-in compatibility with classic μA747 designs in maintenance and replacement scenarios.
FAQ
What is the operating temperature range for the UA747CN?
The UA747CN is characterized for operation from 0°C to 70°C ambient temperature. This industrial-grade range ensures stable performance in factory automation panels, HVAC controllers, and test equipment enclosures without forced cooling. The UA747CN does not support extended or military temperature grades - its absolute maximum storage temperature is −65°C to +150°C, but functional operation is limited to the 0°C–70°C range specified in the Electrical Characteristics table.
Does the UA747CN require external compensation components?
No, the UA747CN does not require external compensation components. It features internal frequency compensation optimized for unity-gain stability across its full operating range. This eliminates the need for external capacitors or resistors in standard inverting, non-inverting, or voltage-follower configurations - simplifying layout and improving reliability in cost-sensitive industrial applications where the UA747CN is commonly deployed.
What is the maximum output voltage swing for the UA747CN?
The UA747CN delivers a maximum peak-to-peak output voltage swing of 24 V into a 10 kΩ load and 20 V into a 2 kΩ load when operated at ±15 V supplies. These values reflect actual measured performance under specified test conditions and define the usable dynamic range for signal conditioning stages. The 24 VPP swing enables full utilization of 12-bit ADCs with ±10 V input ranges without additional gain staging.
How many pins on the UA747CN are unused (NC)?
The UA747CN has five no-connect (NC) pins: pins 9, 10, 12, 13, and 14. These terminals have no internal bond wire or silicon connection and must remain unconnected in PCB layout. They serve only mechanical support and package symmetry roles - routing traces to or grounding these pins may introduce parasitic coupling or violate TI's mechanical recommendations for the PDIP-N package.
Is the UA747CN pin-compatible with other dual op-amps like the LM358?
No, the UA747CN is not pin-compatible with the LM358. While both are dual op-amps in 8-pin packages, the UA747CN uses a 14-pin PDIP with distinct pin mapping - including separate VCC+ pins (pins 8 and 11), dual VCC− (pin 4), and five NC pins. The LM358 uses an 8-pin DIP with shared supply pins and no NC terminals. Direct substitution would require PCB redesign; the UA747CN's pinout is specific to its dual-supply, no-compensation architecture.
UA747CN 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:
- 2
- Output Type:
- -
- Slew Rate:
- 0.5V/µs
- Gain Bandwidth Product:
- 1 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 80 nA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 1.7mA (x2 Channels)
- Current - Output / Channel:
- 25 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:
- 14-PDIP
UA747CN FAQ
1.How can I place an order for UA747CN through Aetrix?
Please submit a Request for Quotation (RFQ) for UA747CN 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 UA747CN reliable?
The price and inventory of UA747CN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UA747CN is usually 5 days.
3.What payment methods are accepted for UA747CN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UA747CN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UA747CN?
UA747CN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UA747CN 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 UA747CN?
For technical support, including UA747CN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UA747CN requirements.
6.How does Aetrix verify that UA747CN is sourced from the original manufacturer or authorized distributors?
All UA747CN 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 UA747CN meets industry standards.
7.What is the process for return or replacement of UA747CN?
All UA747CN units undergo pre-shipment inspection (PSI). If there is an issue with UA747CN, 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 UA747CN part is unused and in its original packaging.
Return procedure for UA747CN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
UA747CN Tags
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