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Texas Instruments TL103WIDRG4
- Part No.:
- TL103WIDRG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TL103WIDRG4.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,928
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Product details
Overview
TL103WIDRG4 from Texas Instruments is a dual operational amplifier with integrated 2.5V shunt voltage reference, designed for precision CC/CV feedback in isolated 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 battery charger and SMPS control circuits.
For engineers reviewing the TL103WIDRG4 datasheet, TL103WIDRG4 pinout, TL103WIDRG4 application, or TL103WIDRG4 equivalent, this page provides verified specifications, SOIC-8 package details, functional pin roles, real-world implementation context for constant-current/constant-voltage regulation, and validated alternative options for power supply feedback design.
Technical Context
The TL103WIDRG4 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 general-purpose signal conditioning.
Its architecture supports wide-supply operation (3V–36V), low quiescent current (550μA total), and EMI-hardened inputs. The reference achieves 0.44% tolerance at 25°C and sinks 0.2mA–100mA, enabling direct use in optocoupler-based isolated feedback without external reference components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3V to 36V - supports wide-input industrial and automotive SMPS without external regulators. |
| Input Offset Voltage (OP1 & OP2) | ±0.3mV typical (25°C), ±2.5mV max (–40°C to 125°C) - enables accurate <1% CV/CC setpoint error in battery chargers. |
| Gain Bandwidth Product | 1.2MHz - sufficient for stable loop compensation in flyback converters up to ~200kHz switching frequency. |
| Reference Voltage | 2.5V ±0.44% (25°C), ±1.04% (–40°C to 125°C) - eliminates need for external precision reference in cost-sensitive designs. |
| Total Supply Current | 550μA - reduces standby power in always-on charging systems and extends battery runtime in portable SMPS. |
| EMI Rejection Ratio | ≥62dB at 400MHz, ≥75dB at 900MHz - mitigates RF interference from GSM/Bluetooth radios near power control circuitry. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive and industrial ambient environments. |
Pinout & Package
TL103WIDRG4 is packaged in an 8-pin SOIC (D package), 4.9mm × 6mm body size, with standard JEDEC lead pitch and gull-wing leads suitable for automated assembly and thermal reliability in power-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | OP AMP1 output | Drives optocoupler LED or external transistor in CV/CC error amplifier configuration. |
| 1IN– | OP AMP1 inverting input | Receives feedback signal (e.g., scaled battery voltage or current-sense voltage) for closed-loop regulation. |
| 1IN+ | OP AMP1 noninverting input / Reference cathode | Internally connected to 2.5V reference; cathode node requiring ≥2.5V headroom and 0.2–100mA sink current. |
| VCC– | Negative supply rail | Ground or negative rail reference for both amplifiers and reference; common return for cathode current. |
| 2IN+ | OP AMP2 noninverting input | Fully uncommitted - used for auxiliary sensing, biasing, or secondary control loop functions. |
| 2IN– | OP AMP2 inverting input | Fully uncommitted - configurable as transimpedance, difference, or instrumentation amplifier input. |
| 2OUT | OP AMP2 output | Provides second independent error signal or signal conditioning path without external ICs. |
| VCC+ | Positive supply rail | Accepts up to 36V - powers both amplifiers and reference; decoupling recommended near Pin 8. |
Key Features
| Feature | Design Value |
|---|---|
| Dual op amp + 2.5V reference integration | Reduces BOM count by 3–4 discrete components (ref + dual op amp) in SMPS feedback networks. |
| 0.44% reference tolerance (25°C) | Enables ±0.5% battery voltage regulation accuracy without trimming or calibration in production. |
| 1.2MHz GBW with 550μA supply current | Delivers >60° phase margin in typical flyback compensation while minimizing quiescent power. |
| EMI-hardened inputs | Suppresses RF-induced errors from nearby wireless modules, improving reliability in connected devices. |
| –40°C to 125°C operation | Validated for automotive engine bay and industrial power supply environments without derating. |
Applications
| Battery Charger CC/CV Control | Isolated Flyback Power Supply |
|---|---|
|
Use Scenario: Regulating lithium-ion battery charge profile using separate constant-current and constant-voltage loops. IC Role / Device Role / Timing Role: TL103WIDRG4 OP AMP1 compares sensed current against 2.5V reference to enforce CC; OP AMP2 compares battery voltage against same reference for CV clamping. Use Value: Eliminates need for external reference and dual op amps, reducing footprint by >30% and component cost by $0.15–$0.25 per unit. |
Use Scenario: Providing primary-side feedback across optocoupler in offline AC/DC flyback converters. IC Role / Device Role / Timing Role: TL103WIDRG4 acts as secondary-side error amplifier, driving optocoupler LED to regulate output voltage and current via isolated communication. Use Value: Achieves <±1% output regulation over line/load/temperature with no secondary-side LDO or precision reference required. |
| Linear Voltage Regulation | Precision Constant Current Sink |
|
Use Scenario: High-accuracy linear regulator for analog sensor biasing or reference voltage generation. IC Role / Device Role / Timing Role: TL103WIDRG4 OP AMP2 configures as series pass controller; internal 2.5V reference sets output voltage via resistive divider. Use Value: Enables 0.5% initial accuracy and <10ppm/°C drift without external reference, simplifying low-noise analog supply design. |
Use Scenario: Driving LEDs or laser diodes with tightly regulated current in test equipment and optical modules. IC Role / Device Role / Timing Role: TL103WIDRG4 OP AMP1 operates in current-sense feedback mode, using internal 2.5V reference to set precise sink current through external FET. Use Value: Delivers 0.1% current stability over temperature and supply variation, replacing discrete op amp + shunt ref solutions. |
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 | Identical electrical specs and pinout; same SOIC-8 package; differs only in tape-and-reel packaging (DR vs DRG4). | No functional difference - both support identical operating conditions, temperature range, and reference performance. | Select TL103WBDR for high-volume automated placement where reel packaging is required; TL103WIDRG4 is optimized for flexible prototyping and small-batch assembly. |
| TL103WADR | Same SOIC-8 package but wider reference tolerance (0.72% at 25°C vs 0.44%) and narrower temp range (–40°C to 105°C). | Suitable for cost-sensitive consumer-grade chargers where ±1% CV accuracy is acceptable and ambient stays below 105°C. | Choose TL103WADR only when full 125°C rating and tight 0.44% reference tolerance are not required - avoids over-spec'ing for lower-tier applications. |
Compared with TL103WIDRG4, TL103WBDR offers identical performance in a different packaging format ideal for SMT lines, while TL103WADR trades reference accuracy and temperature range for lower cost - making TL103WIDRG4 the optimal choice for automotive-grade and high-precision industrial SMPS feedback.
Availability
TL103WIDRG4 is available at Aetrix Electronics and suitable for battery chargers, switch-mode power supplies, and linear voltage regulation requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for TL103WIDRG4 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 decades of expertise in precision amplifiers and power management ICs.
TL103WIDRG4 belongs to TI's TL103Wx family of integrated op amp + reference devices, engineered specifically for cost-optimized, space-constrained CC/CV feedback in isolated and non-isolated power converters.
FAQ
What is the function of Pin 3 (1IN+) on the TL103WIDRG4?
Pin 3 serves a dual role: it is the noninverting input of OP AMP1 and the cathode terminal of the internal 2.5V shunt reference. To activate the reference, this pin must be supplied with ≥2.5V headroom above VCC– and sunk with 0.2mA–100mA current. TL103WIDRG4 relies on this node to generate its fixed reference voltage for both amplifiers' feedback paths.
Does TL103WIDRG4 require an external capacitor on the reference cathode for stability?
No - the TL103WIDRG4 internal shunt reference is fully compensated and stable without an external capacitor. However, Figure 5-22 in the datasheet defines capacitive load limits: stability is maintained for loads ≤100nF. Larger capacitors may induce oscillation, so TL103WIDRG4 should be used with resistive or lightly filtered reference loads unless stability testing confirms otherwise.
Can TL103WIDRG4 operate from a single 5V supply?
Yes - TL103WIDRG4 functions across 3V–36V supply range, including single 5V operation. At 5V, the internal 2.5V reference provides an accurate mid-rail voltage for biasing, and both amplifiers maintain full input common-mode range (VCC– to VCC+ – 1.5V). TL103WIDRG4 delivers specified offset, bandwidth, and output swing under these conditions.
How does the EMI rejection capability of TL103WIDRG4 improve system reliability?
TL103WIDRG4 integrates on-die RF and EMI filters, achieving ≥75dB rejection at 900MHz (GSM band) and ≥65dB at 2.4GHz (Wi-Fi/Bluetooth). This prevents RF rectification at amplifier inputs that could cause false triggering or regulation drift - a critical advantage in TL103WIDRG4-based chargers co-located with wireless modules or in EMI-heavy industrial enclosures.
What is the maximum cathode current supported by TL103WIDRG4's internal reference?
The TL103WIDRG4 internal reference supports up to 100mA sink current at the cathode (Pin 3), with a minimum of 0.2mA required for regulation. This wide range allows direct drive of optocoupler LEDs (typically 5–20mA) or higher-current external transistors without buffering - a key enabler of compact TL103WIDRG4 implementations in high-power SMPS feedback circuits.
TL103WIDRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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
TL103WIDRG4 FAQ
1.How can I place an order for TL103WIDRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TL103WIDRG4 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 TL103WIDRG4 reliable?
The price and inventory of TL103WIDRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL103WIDRG4 is usually 5 days.
3.What payment methods are accepted for TL103WIDRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL103WIDRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL103WIDRG4?
TL103WIDRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL103WIDRG4 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 TL103WIDRG4?
For technical support, including TL103WIDRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL103WIDRG4 requirements.
6.How does Aetrix verify that TL103WIDRG4 is sourced from the original manufacturer or authorized distributors?
All TL103WIDRG4 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 TL103WIDRG4 meets industry standards.
7.What is the process for return or replacement of TL103WIDRG4?
All TL103WIDRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TL103WIDRG4, 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 TL103WIDRG4 part is unused and in its original packaging.
Return procedure for TL103WIDRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL103WIDRG4 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
Texas Instruments
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LM2904DGKR
Texas Instruments
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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
Texas Instruments
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LM358P
Texas Instruments
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