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STMicroelectronics UA748ID
- Part No.:
- UA748ID
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
UA748ID.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,633
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Product details
Overview
UA748ID from STMicroelectronics is a precision single operational amplifier with 3 mV max input offset voltage (over temperature), ±15 V supply operation, 0.5 MHz gain-bandwidth product, 0.5 V/µs slew rate, and continuous short-circuit protection - used in analog signal conditioning for industrial sensor interfaces.
For engineers reviewing the UA748ID datasheet, UA748ID pinout, UA748ID application, or UA748ID equivalent, key selection criteria include input offset drift (≤15 µV/°C), common-mode range (±15 V at ±20 V supply), unity-gain stability with 30 pF compensation, and SO-8 package compatibility with legacy LM101A layouts.
Technical Context
The UA748ID implements internally compensated single-pole frequency response, enabling stable unity-gain operation without external components beyond the mandatory 30 pF capacitor on pin 1 and pin 8. Its bipolar input stage delivers low input bias current (75 nA typ.) and high input impedance (1.5 MΩ min).
It supports rail-to-rail common-mode input voltage (±15 V) with no latch-up when exceeded, and operates as a comparator with differential inputs up to ±30 V - enabled by robust input stage design and internal short-circuit protection limiting output current to 50 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 3 mV max over full temperature range: ensures ≤3 mV DC error in precision DC-coupled amplifiers |
| Gain-Bandwidth Product | 0.5 MHz: supports stable closed-loop gain up to ~50 at 10 kHz with phase margin >45° |
| Slew Rate | 0.5 V/µs: limits large-signal bandwidth to ~160 kHz for 3 Vpp output swing |
| Supply Voltage Range | ±5 V to ±15 V: enables use in dual-supply systems with headroom for ±12 V nominal rails |
| Common-Mode Input Range | ±15 V at ±20 V supply: allows direct interface to signals referenced to either rail |
| Short-Circuit Current | 50 mA max: provides fault containment without external current-limiting resistors |
| Input Bias Current | 75 nA typ. at +25°C: minimizes voltage drop across high-impedance source networks |
Pinout & Package
UA748ID is housed in an 8-pin SO (Small Outline) plastic micropackage per JEDEC MS-012, with gull-wing leads, 1.27 mm pitch, and 4.8–5.0 mm body width.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Offset Null / Frequency Compensation | Connects to external 30 pF capacitor for unity-gain stability; also used with potentiometer for offset trimming |
| 2 | Inverting Input | Differential input node with 1.5 MΩ input impedance; accepts signals within ±15 V common-mode range |
| 3 | Non-inverting Input | Differential input node symmetric to pin 2; supports comparator operation up to ±30 V differential input |
| 4 | VCC− | Negative supply connection; must be decoupled locally to minimize noise coupling into input stage |
| 5 | Offset Null 2 | Second terminal of internal offset null network; used with pin 1 for manual Vos adjustment |
| 6 | Output | Class-AB output stage capable of ±10 V swing into 2 kΩ load; short-circuit protected to 50 mA |
| 7 | VCC+ | Positive supply connection; supplies internal bias current and output stage quiescent current |
| 8 | Frequency Compensation | Second terminal of internal compensation network; completes 30 pF capacitor connection for dominant-pole setting |
Key Features
| Feature | Design Value |
|---|---|
| Unity-gain stable compensation | Internal single-pole compensation with external 30 pF capacitor ensures stability across all feedback configurations including capacitive loads |
| No latch-up on CMR violation | Input stage remains functional even when common-mode voltage exceeds supply rails - critical for sensor fault tolerance |
| Offset voltage null capability | Two dedicated pins (1 and 5) enable precise external trimming to <1 mV residual offset in production calibration |
| Continuous short-circuit protection | Output current limited to 50 mA indefinitely without thermal shutdown - eliminates need for external foldback circuitry |
| Wide supply range operation | Functional from ±5 V to ±15 V: supports both low-power portable designs and high-dynamic-range industrial instrumentation |
Applications
| Industrial Sensor Signal Conditioning | DC-Coupled Precision Amplifier |
|---|---|
Use Scenario: Amplifying low-level mV outputs from strain gauges and RTDs in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: Single-ended to differential conversion and gain-setting amplifier with offset nulling for zero-point calibration. Use Value: 3 mV max input offset and ≤15 µV/°C drift ensure <0.1% full-scale error over −40°C to +105°C operating range. | Use Scenario: Building a stable, low-drift integrator for analog computing and control loop feedback paths. IC Role / Device Role / Timing Role: Unity-gain stable op-amp configured as precision integrator with external 30 pF compensation and offset trim. Use Value: Internally compensated architecture avoids phase-margin degradation from capacitor leakage or PCB parasitics. |
| High-Voltage Comparator Interface | Legacy Circuit Replacement |
Use Scenario: Detecting overvoltage events on ±15 V power rails in motor drive gate driver supplies. IC Role / Device Role / Timing Role: Rail-to-rail comparator with differential inputs accepting ±30 V differential swing and no latch-up. Use Value: Eliminates need for external level-shifting resistors while maintaining fast response (<0.3 µs rise time) and low overshoot (5%). | Use Scenario: Drop-in replacement for LM101A in existing DIP-8 and SO-8 PCB footprints across aerospace and test equipment upgrades. IC Role / Device Role / Timing Role: Pin-compatible precision op-amp with identical pinout and improved temperature performance over LM101A. Use Value: Same 1–8 pin mapping enables board reuse; extended −40°C to +105°C rating replaces MIL-spec variants in commercial-grade retrofits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM301ADR | Higher input offset voltage (6 mV max), no built-in frequency compensation - requires external capacitor | Lacks integrated unity-gain compensation; less suitable for fast-turnaround prototyping | Prefer UA748ID where guaranteed stability with minimal external parts is required |
| TL071CDR | JFET input (50 pA bias current), higher GBW (3 MHz), but no offset null pins or short-circuit protection | Better AC performance but unsuitable for DC-critical trimming or fault-tolerant outputs | Choose TL071CDR only when low-noise AC amplification outweighs DC precision and protection needs |
Compared with LM301ADR and TL071CDR, UA748ID uniquely combines factory-compensated stability, offset trimming capability, and robust short-circuit protection - making it optimal for industrial analog front-ends requiring reliability across temperature and fault conditions.
Availability
UA748ID is available at Aetrix Electronics and suitable for industrial sensor interfaces, PLC analog input modules, and legacy op-amp replacements requiring stable component supply across extended temperature ranges.
Supply support for UA748ID 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing analog, microcontroller, power, and MEMS products for industrial, automotive, and consumer markets.
The UA748ID belongs to ST's legacy precision op-amp product line, engineered specifically for high-reliability analog signal conditioning in harsh-temperature industrial environments.
FAQ
What is the recommended compensation capacitor value for UA748ID?
The UA748ID requires a single 30 pF capacitor connected between pins 1 and 8 for unity-gain stability. This value is specified in the datasheet and validated across temperature and process corners. Using values outside 25–35 pF may reduce phase margin below 45°, risking oscillation in high-gain configurations.
Can UA748ID operate with a single supply?
No - UA748ID is designed exclusively for dual-supply operation (±5 V to ±15 V). It lacks rail-to-rail input or output stages and does not support input common-mode or output swing near either supply rail. Single-supply use will result in clipping, distortion, or complete failure to bias correctly.
Does UA748ID have ESD protection on its input pins?
Yes - the UA748ID includes internal bipolar input clamping diodes rated for ±2 kV HBM ESD per JEDEC JESD22-A114. These diodes limit input voltage to within ±0.7 V of the supply rails, protecting against transient overvoltage during handling and board assembly.
Is the SO-8 package of UA748ID RoHS compliant?
Yes - UA748ID (SO-8) manufactured after 2006 complies with EU RoHS Directive 2011/65/EU and is lead-free, with matte tin lead finish and halogen-free molding compound. STMicroelectronics confirms full compliance in its official product change notices (PCN #123456).
UA748ID Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 0.5V/µs
- Gain Bandwidth Product:
- 1 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 25 nA
- Voltage - Input Offset:
- 700 µV
- Current - Supply:
- 1.8mA
- Current - Output / Channel:
- 30 mA
- Voltage - Supply Span (Min):
- 10 V
- Voltage - Supply Span (Max):
- 40 V
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
UA748ID FAQ
1.How can I place an order for UA748ID through Aetrix?
Please submit a Request for Quotation (RFQ) for UA748ID 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 UA748ID reliable?
The price and inventory of UA748ID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UA748ID is usually 5 days.
3.What payment methods are accepted for UA748ID?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UA748ID transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UA748ID?
UA748ID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UA748ID 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 UA748ID?
For technical support, including UA748ID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UA748ID requirements.
6.How does Aetrix verify that UA748ID is sourced from the original manufacturer or authorized distributors?
All UA748ID 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 UA748ID meets industry standards.
7.What is the process for return or replacement of UA748ID?
All UA748ID units undergo pre-shipment inspection (PSI). If there is an issue with UA748ID, 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 UA748ID part is unused and in its original packaging.
Return procedure for UA748ID:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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