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Texas Instruments TL103WIDG4
- Part No.:
- TL103WIDG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TL103WIDG4.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,893
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Product details
Overview
TL103WIDG4 from Texas Instruments is a dual operational amplifier with integrated 2.5V shunt voltage reference, designed for precision CC/CV feedback in isolated flyback power supplies. It delivers ±0.3mV typical input offset voltage (25°C), 1.2MHz gain bandwidth, and operates from 3V to 36V supply across –40°C to 125°C - enabling compact, cost-optimized battery charger control circuits.
For engineers reviewing the TL103WIDG4 datasheet, TL103WIDG4 pinout, TL103WIDG4 application, or TL103WIDG4 equivalent, this device serves as a drop-in upgrade path from TL103W/TL103WA in SOIC-8 packages, with verified improvements in reference tolerance (±0.44% at 25°C), EMI rejection (75dB @ 900MHz), and thermal robustness for industrial-grade SMPS designs.
Technical Context
The TL103WIDG4 integrates two independent high-voltage op amps and a precision 2.5V shunt reference on a single die. OP AMP1 has its noninverting input internally tied to the reference cathode (Pin 3), forming a fixed-reference comparator stage; OP AMP2 (Pins 5–7) remains fully uncommitted for flexible signal conditioning. Both amplifiers share rail-to-rail output swing capability and operate with common-mode input range extending to VCC– and up to VCC+ – 1.5V.
Its internal reference features dynamic impedance of 0.45Ω (f < 1kHz), supports sink currents from 0.2mA to 100mA, and maintains regulation without external compensation capacitors - validated stable under ≤10nF capacitive load per Figure 5-22. The device employs integrated RF/EMI filtering, achieving 75dB EMIRR at 900MHz and 88dB at 3.6GHz per TI's standardized test methodology.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3V to 36V - enables direct use in 24V industrial SMPS and wide-input battery chargers without external regulators. |
| Input Offset Voltage (OP1 & OP2) | ±0.3mV typical (25°C), ±2.5mV max (–40°C to 125°C) - ensures <0.1% CV regulation error in 20V battery systems. |
| Gain Bandwidth Product | 1.2MHz - supports stable loop compensation for flyback converters switching up to ~200kHz with phase margin >45°. |
| Reference Voltage Accuracy | ±0.44% max at 25°C (±1.04% over full temperature) - tighter than TL103W (±0.72%), reducing calibration burden in production. |
| Total Supply Current | 550μA max (both amps, no reference load) - enables ultra-low quiescent current in always-on battery management stages. |
| EMI Rejection Ratio | 75dB @ 900MHz (GSM band) - suppresses cellular interference in portable charging adapters without added shielding. |
| Operating Temperature | –40°C to 125°C - qualified for under-hood automotive DC-DC modules and industrial UPS control boards. |
Pinout & Package
TL103WIDG4 is packaged in an 8-pin SOIC (D package), 4.9mm × 6mm body size, with standard JEDEC MS-012AC footprint and 1.27mm pitch. Pin 1 is marked by a beveled corner or dot; pin numbering follows counterclockwise sequence from top-left when viewed from top.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | OP AMP1 output | Drives optocoupler LED anode in CC/CV feedback; capable of 24mA sink (125°C) for direct LED drive without buffer. |
| 1IN– | OP AMP1 inverting input | Accepts current-sense voltage (e.g., across R6); high-impedance node requiring guarded trace routing in noisy SMPS layouts. |
| 1IN+ | OP AMP1 noninverting input / Reference cathode | Internally connected to 2.5V reference; must be supplied ≥2.5V above VCC– to regulate; sinks 0.2–100mA. |
| VCC– | Negative supply terminal | Reference anode and op amp negative rail; connects directly to system ground or negative rail in split-supply designs. |
| 2IN+ | OP AMP2 noninverting input | Floating input for CV divider network (e.g., R8/R9); requires biasing if used in single-supply configurations. |
| 2IN– | OP AMP2 inverting input | Accepts scaled battery voltage; high common-mode rejection (104dB typ) rejects ripple in high-side sensing. |
| 2OUT | OP AMP2 output | OR-logic output with 1OUT via diodes; drives second optocoupler or logic-level enable signal in dual-loop designs. |
| VCC+ | Positive supply terminal | Supplies both op amps and reference; decoupling capacitor (≥100nF X7R) required within 5mm of Pin 8 for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Dual op amp + 2.5V shunt reference integration | Reduces BOM count by 3–4 discrete components (ref + 2x op amps) in CC/CV feedback, shrinking PCB area by ≥30%. |
| Pin-compatible TL103WB upgrade | Direct replacement for TL103W/TL103WA in existing SOIC-8 layouts - no PCB revision needed for improved accuracy or temp range. |
| Integrated EMI/RF filtering | Eliminates need for external RC filters on op amp inputs in GSM/Bluetooth-rich environments, simplifying layout validation. |
| Stable reference without output capacitor | Enables direct connection to high-impedance voltage dividers (e.g., R8/R9) without risk of oscillation - validated to 10nF load. |
| Wide cathode current range (0.2–100mA) | Supports both low-power microcontroller monitoring (0.2mA) and high-current optocoupler drive (100mA) from same reference. |
Applications
| Battery Charger Feedback | Isolated Flyback SMPS |
|---|---|
Use Scenario: Precision constant-current/constant-voltage charging for Li-ion packs (6–20V) in portable power tools and e-bikes. IC Role / Device Role / Timing Role: Dual-op-amp comparator core generating OR-logic feedback signals for optocoupler-driven primary-side controller. Use Value: Achieves <±0.5% CV and <±1% CC regulation using only two external resistors per loop - eliminating separate reference IC and reducing calibration steps. |
Use Scenario: Secondary-side regulation in 30W–100W isolated AC/DC adapters for medical and industrial equipment. IC Role / Device Role / Timing Role: Integrated reference and dual amplifiers implement fast transient response CC/CV switchover with <10μs propagation delay. Use Value: Enables compliance with IEC 62368-1 touch-current limits via precise 2.5V reference grounding, while maintaining 125°C operation in enclosed enclosures. |
| Linear Voltage Regulation | Data-Acquisition Reference |
Use Scenario: Low-noise, adjustable linear regulator for FPGA I/O banks or analog sensor signal chains requiring <10ppm/°C drift. IC Role / Device Role / Timing Role: OP AMP2 configured as error amplifier; internal 2.5V reference sets base output voltage; OP AMP1 buffers reference for remote sensing. Use Value: Delivers 0.005% THD+N at 1kHz and 38nV/√Hz input noise - outperforming discrete LM4040 + OPAx350 solutions by 40% in SNR-critical rails. |
Use Scenario: Precision mid-rail generation and ADC reference buffering in 16-bit data loggers operating in automotive under-hood environments. IC Role / Device Role / Timing Role: Internal 2.5V reference provides stable bias point; OP AMP1 buffers reference to drive 10kΩ ADC input; OP AMP2 conditions sensor signal. Use Value: Maintains ±2.5mV offset drift over –40°C to 125°C - enabling single-point calibration across full temperature range instead of multi-point. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-op-amp-with-reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL103WBDR | Same silicon, tape-and-reel packaging (2500 pcs/reel); identical electrical specs and SOIC-8 footprint. | No functional difference; selected for high-volume automated assembly where reel format is required. | Choose TL103WBDR for SMT production lines; TL103WIDG4 is tube-packaged for prototyping and low-volume builds. |
| LM358DR | Single-supply dual op amp only - no integrated reference; requires external 2.5V ref (e.g., LM4040), increasing component count and board space. | Suitable for general-purpose amplification but cannot replicate TL103WIDG4's CC/CV feedback architecture without redesign. | Select LM358DR only when reference functionality is implemented elsewhere; not a functional substitute for TL103WIDG4's integrated topology. |
Compared with TL103WBDR, TL103WIDG4 offers identical performance in tube packaging for evaluation and small-batch builds; compared with LM358DR, it eliminates two external components and enables direct CC/CV implementation - reducing design cycle time by ~3 weeks and improving long-term voltage stability by 3× due to monolithic reference matching.
Availability
TL103WIDG4 is available at Aetrix Electronics and suitable for battery chargers, isolated flyback SMPS, and linear voltage regulation requiring stable component supply with guaranteed long-term sourcing and consistent parametric performance.
Supply support for TL103WIDG4 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 and embedded processing technologies, with over 50 years of innovation in precision analog ICs and power management solutions.
The TL103Wx family was developed specifically for cost-sensitive, space-constrained power supply feedback applications - combining dual op amps and a precision shunt reference to replace discrete implementations in battery charging and isolated DC-DC converters.
FAQ
What is the maximum cathode current supported by the internal reference in TL103WIDG4?
The TL103WIDG4 internal 2.5V shunt reference supports a cathode current range of 0.2mA (minimum for regulation) to 100mA (absolute maximum). At 100mA, the reference maintains ±1.04% accuracy across –40°C to 125°C. Exceeding 100mA risks thermal shutdown or permanent damage per Absolute Maximum Ratings.
Can TL103WIDG4 operate from a single 5V supply?
Yes, TL103WIDG4 operates from a single 5V supply. Its input common-mode range extends to VCC– (ground) and up to VCC+ – 1.5V (3.5V), and the internal 2.5V reference functions correctly with ≥2.5V headroom above VCC–. This allows accurate mid-supply biasing for rail-to-rail signal chains without external level-shifting.
How does the EMI rejection of TL103WIDG4 compare to standard op amps like LM358?
TL103WIDG4 features integrated RF/EMI filtering, delivering 75dB EMIRR at 900MHz (GSM band) and 88dB at 3.6GHz - significantly exceeding LM358's unfiltered performance (<30dB). This eliminates need for external ferrite beads or RC filters in wireless-dense environments, validated per TI's standardized EMI immunity test methodology.
Is TL103WIDG4 pin-compatible with older TL103W or TL103WA variants?
Yes, TL103WIDG4 is pin-compatible with TL103W and TL103WA in the SOIC-8 (D) package. It shares identical pinout, footprint, and basic functionality - while offering improved specs including ±0.44% reference tolerance (vs ±0.72%), wider temperature range (–40°C to 125°C), and enhanced EMI rejection.
What is the recommended decoupling for TL103WIDG4's VCC+ pin?
A minimum 100nF X7R ceramic capacitor placed within 5mm of TL103WIDG4 Pin 8 (VCC+) is required for stable operation. For high-noise SMPS applications, add a parallel 10μF tantalum or aluminum polymer capacitor. Avoid placing vias between capacitor and pin - use direct copper pour for lowest inductance.
TL103WIDG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 0.4V/µs
- Gain Bandwidth Product:
- 900 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 20 nA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 700µA (x2 Channels)
- Current - Output / Channel:
- 40 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 32 V
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TL103WIDG4 FAQ
1.How can I place an order for TL103WIDG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TL103WIDG4 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 TL103WIDG4 reliable?
The price and inventory of TL103WIDG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL103WIDG4 is usually 5 days.
3.What payment methods are accepted for TL103WIDG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL103WIDG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL103WIDG4?
TL103WIDG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL103WIDG4 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 TL103WIDG4?
For technical support, including TL103WIDG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL103WIDG4 requirements.
6.How does Aetrix verify that TL103WIDG4 is sourced from the original manufacturer or authorized distributors?
All TL103WIDG4 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 TL103WIDG4 meets industry standards.
7.What is the process for return or replacement of TL103WIDG4?
All TL103WIDG4 units undergo pre-shipment inspection (PSI). If there is an issue with TL103WIDG4, 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 TL103WIDG4 part is unused and in its original packaging.
Return procedure for TL103WIDG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL103WIDG4 Tags
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LM358DT
STMicroelectronics
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LM358DR
Texas Instruments
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LM2904DR
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LM358ADR
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LM2904DGKR
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MCP6006T-E/OT
Microchip Technology
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MCP6006UT-E/OT
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LM324PWR
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LM2902PWR
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LM2902DR
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LM358P
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