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Texas Instruments TL103WIDR
- Part No.:
- TL103WIDR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TL103WIDR.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,974
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Product details
Overview
TL103WIDR 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 TL103WIDR datasheet, TL103WIDR pinout, TL103WIDR application, or TL103WIDR 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, and thermal robustness for industrial-grade SMPS designs.
Technical Context
The TL103WIDR integrates two independent high-voltage op amps and a fixed 2.5V shunt reference tied to OP AMP1's noninverting input. OP AMP2 remains fully uncommitted, supporting flexible error amplification and current-sense signal conditioning. Its internal reference sinks 0.2mA to 100mA while maintaining ±2.5mV max input offset over full temperature range.
This architecture enables single-chip implementation of constant-current/constant-voltage regulation without external references or bias networks. The device features integrated RF/EMI filtering (EMIRR ≥62dB at 400MHz), rail-to-rail output swing (27.4V @ 30V supply), and stable operation with capacitive loads up to 10nF per Figure 5-22.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3V to 36V - supports wide-input industrial and automotive SMPS without auxiliary LDOs. |
| Input Offset Voltage (max) | ±2.5mV (–40°C to 125°C) - ensures <±0.1% CV regulation error at 2.5V reference point. |
| Gain Bandwidth Product | 1.2MHz - enables stable loop compensation for flyback converters up to ~200kHz switching frequency. |
| Reference Voltage Accuracy | ±0.44% at 25°C (±1.04% over temp) - tighter than TL103W (±0.72%), reducing calibration burden in battery chargers. |
| Total Supply Current | 550μA (typical) - allows direct connection to high-impedance optocoupler emulators without loading. |
| EMI Rejection Ratio | ≥62dB at 400MHz, ≥75dB at 900MHz - mitigates GSM/ISM-band interference in densely routed PCBs. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood and industrial ambient environments without derating. |
Pinout & Package
TL103WIDR is packaged in an 8-pin SOIC (D package), 4.9mm × 6mm body size with standard JEDEC MS-012AC footprint. Pin 1 is marked with a dot or bevelled corner; pin numbering follows counterclockwise convention from top-left when viewed from top.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | OP AMP1 output | Drives optocoupler LED or error amplifier load; rail-to-rail swing supports full dynamic range. |
| 1IN– | OP AMP1 inverting input | Accepts feedback signal from voltage divider (CV) or current sense resistor (CC) network. |
| 1IN+ | OP AMP1 noninverting input / VREF cathode | Internally connected to 2.5V reference; requires ≥2.5V headroom and 0.2–100mA sink current. |
| VCC– | Negative supply terminal | Reference ground for both op amps and shunt reference; must be low-impedance return path. |
| 2IN+ | OP AMP2 noninverting input | Uncommitted - used for secondary error channel, temperature compensation, or fault monitoring. |
| 2IN– | OP AMP2 inverting input | Uncommitted - configurable as inverting amplifier, comparator, or differential input stage. |
| 2OUT | OP AMP2 output | Independent output for auxiliary control functions; shares same supply rails and thermal path. |
| VCC+ | Positive supply terminal | Accepts up to 36V DC; powers both amplifiers and reference simultaneously with single rail. |
Key Features
| Feature | Design Value |
|---|---|
| Dual op amp + integrated 2.5V reference | Eliminates external reference IC and bias resistors - reduces BOM count by ≥3 components in CC/CV feedback loops. |
| 0.44% reference tolerance (25°C) | Enables ±0.011V absolute accuracy at 2.5V node - critical for ≤1% battery voltage regulation compliance. |
| 1.2MHz GBW with 0.5V/µs slew rate | Supports fast transient response in high-frequency flyback converters without phase-margin compromise. |
| Integrated EMI/RF filtering | Reduces need for external ferrite beads or RC snubbers on sensitive analog inputs in noisy switcher layouts. |
| Stable with 10nF capacitive load | Allows direct driving of optocoupler LEDs or small ceramic bypass caps without oscillation risk. |
Applications
| Battery Charger Feedback | Isolated Flyback Regulator |
|---|---|
Use Scenario: Precision constant-current/constant-voltage charging for Li-ion or lead-acid batteries in portable and EVSE applications. IC Role / Device Role / Timing Role: Dual-op-amp core implements simultaneous CC and CV error amplification; internal 2.5V reference sets exact trip thresholds. Use Value: Eliminates external reference and reduces layout area by >30% versus discrete op amp + REF5025 solution. |
Use Scenario: Secondary-side voltage and current regulation in AC/DC adapters and telecom power supplies with optocoupler isolation. IC Role / Device Role / Timing Role: TL103WIDR provides isolated feedback signal to primary controller via opto-emulator; reference stabilizes CV setpoint against line/load variation. Use Value: Achieves <±1% output regulation across 10:1 load range without trimming, leveraging tight 0.44% reference tolerance. |
| Linear Voltage Regulation | Data-Acquisition Reference |
Use Scenario: Low-noise, high-PSRR linear regulator for analog sensor front-ends or DAC reference buffers. IC Role / Device Role / Timing Role: OP AMP2 configured as unity-gain buffer; internal 2.5V reference supplies stable bias to series pass element. Use Value: PSRR of 114dB suppresses ripple from upstream switching stages, improving ADC effective resolution by ≥2 LSB. |
Use Scenario: Precision mid-supply reference generation for single-supply op amp circuits in portable instrumentation. IC Role / Device Role / Timing Role: Internal 2.5V reference replaces external rail-splitter; OP AMP1/2 provide buffered, low-Z virtual ground. Use Value: Delivers 2.5V ±0.026V (1.04%) over –40°C to 125°C - enables accurate 12-bit measurement without calibration. |
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; D package, tape-and-reel packaging only (no cut-tape option). | Same use cases; preferred for high-volume automated assembly where reel delivery is required. | Select TL103WBDR when ordering ≥2,500 units and requiring machine-ready packaging. |
| TL103WADR | Looser reference tolerance (0.72% at 25°C), narrower temp range (–40°C to 105°C), higher max offset (±5mV). | Suitable for cost-sensitive, non-automotive applications where ±2% CV accuracy is acceptable. | Choose TL103WADR only if legacy design reuse or BOM cost reduction outweighs precision requirements. |
Compared with TL103WADR, TL103WIDR offers 0.28% tighter reference tolerance and 20°C wider operating range - directly improving battery voltage regulation accuracy and thermal margin in industrial chargers; TL103WBDR differs only in packaging format, with no functional or performance trade-offs.
Availability
TL103WIDR is available at Aetrix Electronics and suitable for battery chargers, isolated flyback regulators, and linear voltage regulation requiring stable component supply with guaranteed long-term manufacturability.
Supply support for TL103WIDR 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 op amps and power management ICs.
The TL103Wx family was developed specifically for cost-optimized, space-constrained CC/CV feedback in isolated switch-mode power supplies - targeting battery charging, adapter, and industrial PSU applications.
FAQ
What is the function of Pin 3 (1IN+) on the TL103WIDR?
Pin 3 serves as both the noninverting input of OP AMP1 and the cathode terminal of the internal 2.5V shunt reference. It must be supplied with ≥2.5V headroom relative to VCC– and sunk with 0.2mA–100mA current to maintain regulation. TL103WIDR uses this pin to establish precise voltage thresholds for constant-voltage control loops without external components.
Does TL103WIDR require an external capacitor on the reference node?
No - the TL103WIDR's internal shunt reference is internally compensated and stable without an output capacitor. However, Figure 5-22 in the datasheet defines the stable region for capacitive loads up to 10nF; exceeding this may cause oscillation. TL103WIDR's stability is validated for direct optocoupler LED drive without added capacitance.
How does TL103WIDR differ from TL103WADR in practical design?
TL103WIDR improves reference tolerance (0.44% vs. 0.72% at 25°C), extends temperature range (–40°C to 125°C vs. 105°C), and lowers input offset (±2.5mV vs. ±5mV full-range). In a 20V battery charger, these translate to ±0.088V tighter CV accuracy and reliable operation in under-hood environments where TL103WADR would derate or fail.
Can TL103WIDR drive an optocoupler LED directly?
Yes - TL103WIDR's 1OUT pin sources up to 40mA and sinks up to 24mA (TL103WB spec), sufficient for standard PC817 or SFH615A optocouplers. Its rail-to-rail output swing (27.4V at 30V supply) ensures full LED forward-voltage margin, and integrated EMI filtering prevents false triggering from switching noise.
What is the maximum cathode current rating for the internal reference in TL103WIDR?
The TL103WIDR reference supports a cathode current range of 0.2mA (minimum for regulation) to 100mA (absolute maximum). At 10mA typical, it achieves ±0.44% tolerance at 25°C. Exceeding 100mA risks permanent damage; design must include current-limiting resistor (e.g., R5 in Figure 7-1) sized per Equation 3 in the datasheet.
TL103WIDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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
TL103WIDR FAQ
1.How can I place an order for TL103WIDR through Aetrix?
Please submit a Request for Quotation (RFQ) for TL103WIDR 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 TL103WIDR reliable?
The price and inventory of TL103WIDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL103WIDR is usually 5 days.
3.What payment methods are accepted for TL103WIDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL103WIDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL103WIDR?
TL103WIDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL103WIDR 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 TL103WIDR?
For technical support, including TL103WIDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL103WIDR requirements.
6.How does Aetrix verify that TL103WIDR is sourced from the original manufacturer or authorized distributors?
All TL103WIDR 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 TL103WIDR meets industry standards.
7.What is the process for return or replacement of TL103WIDR?
All TL103WIDR units undergo pre-shipment inspection (PSI). If there is an issue with TL103WIDR, 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 TL103WIDR part is unused and in its original packaging.
Return procedure for TL103WIDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL103WIDR Tags
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