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Texas Instruments TL103WAID
- Part No.:
- TL103WAID
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TL103WAID.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,689
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Product details
Overview
TL103WAID 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 ±0.5mV max input offset voltage (25°C), 0.9MHz gain bandwidth, and operates from 3V to 32V supply across –40°C to 105°C - enabling compact battery charger and SMPS control circuits.
For engineers reviewing the TL103WAID datasheet, TL103WAID pinout, TL103WAID application, or TL103WAID equivalent, this device serves as a drop-in upgrade path from TL103W with tighter reference tolerance (0.44% at 25°C), lower quiescent current (0.77mA typ), and enhanced EMI rejection - critical for noise-sensitive flyback feedback loops and linear regulator error amplifiers.
Technical Context
The TL103WAID 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-sensing topologies. Its internal reference requires ≥2.5V headroom and 0.5–100mA cathode current for regulation.
This architecture enables single-supply mid-rail referencing without external components while maintaining rail-to-rail output swing (27V at VCC+ = 30V, RL = 10kΩ) and stable operation up to 100mA sink current - directly addressing constant-current sink and precision voltage regulation requirements in cost-constrained power designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3V to 32V - supports wide-input industrial and automotive SMPS without external regulators |
| Input Offset Voltage (25°C) | ±0.5mV max - enables <1% CV accuracy in battery charging with minimal calibration |
| Reference Voltage Tolerance | ±0.44% at 25°C (±1.04% over full temp) - ensures stable 2.5V reference for precise current/voltage thresholds |
| Gain Bandwidth Product | 0.9MHz - sufficient for loop compensation in 100–500kHz flyback converters |
| Total Supply Current | 0.77mA typical at 5V - reduces standby power in always-on charger control stages |
| Operating Temperature Range | –40°C to +105°C - qualified for under-hood and industrial ambient environments |
| Cathode Current Range | 0.5mA to 100mA - accommodates both low-power sensing and high-current regulation loads |
Pinout & Package
TL103WAID is housed in an 8-pin SOIC (D package), 4.9mm × 6mm body size, with standard surface-mount footprint and thermal performance (RθJA = 135.4°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | OP AMP1 output | Drives optocoupler LED or error amplifier output in CC/CV control loop |
| 1IN– | OP AMP1 inverting input | Accepts feedback signal from current-sense resistor or voltage divider |
| 1IN+ | OP AMP1 noninverting input / Reference cathode | Internally tied to 2.5V reference; cathode terminal for shunt regulation |
| VCC– | Negative supply rail | Ground reference for both amplifiers and reference; common return path |
| 2IN+ | OP AMP2 noninverting input | Uncommitted - used for secondary error sensing (e.g., battery voltage monitoring) |
| 2IN– | OP AMP2 inverting input | Uncommitted - configurable for differential or single-ended sensing |
| 2OUT | OP AMP2 output | Provides second independent error signal, e.g., for OR'ed CV/CC dominance logic |
| VCC+ | Positive supply rail | Primary power input; supports up to 32V for direct connection to SMPS output rails |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 2.5V shunt reference | Eliminates external reference IC and reduces BOM count in CC/CV feedback circuits |
| Low input offset voltage (±0.5mV) | Enables sub-1% current regulation accuracy without trimming in production chargers |
| Wide supply range (3V–32V) | Supports direct interface to 5V auxiliary rails or 24V industrial bus without LDO pre-regulation |
| 0.5–100mA cathode current capability | Permits use with high-gain optocouplers (e.g., PC817) and low-R sense resistors down to 10mΩ |
| –40°C to +105°C operation | Validated for under-dash automotive battery management and industrial power supply applications |
Applications
| Battery Charger CC/CV Control | Isolated Flyback Feedback |
|---|---|
|
Use Scenario: Precision constant-current/constant-voltage charging of Li-ion or lead-acid batteries in wall adapters and portable power banks. IC Role / Device Role / Timing Role: Dual op amp implements current-sense error amplifier (OP AMP1) and voltage-sense error amplifier (OP AMP2); internal 2.5V reference sets exact CC threshold and CV setpoint. Use Value: Achieves <±1% charge voltage and <±2% current accuracy over temperature without calibration, reducing test time and component count. |
Use Scenario: Secondary-side feedback in isolated AC/DC flyback converters for USB PD, telecom, and industrial power supplies. IC Role / Device Role / Timing Role: TL103WAID drives optocoupler LED via OP AMP1 output; OP AMP2 provides redundant or auxiliary regulation path; reference stabilizes feedback threshold against supply ripple. Use Value: Enables Class II isolation compliance with <500μA total quiescent current and inherent EMI filtering - improving conducted emissions margin by >10dB. |
| Linear Voltage Regulation | Precision Constant Current Sink |
|
Use Scenario: Low-noise, adjustable linear regulator for analog sensor biasing or DAC reference buffering in industrial PLC modules. IC Role / Device Role / Timing Role: OP AMP2 configured as series pass controller; internal 2.5V reference feeds into resistor divider to set output voltage; OP AMP1 unused or disabled. Use Value: Delivers <10ppm/°C output drift using only two external resistors and no external reference - simplifying layout and improving long-term stability. |
Use Scenario: High-accuracy LED driver or electrochemical sensor current source requiring stable 0.5–100mA output over temperature. IC Role / Device Role / Timing Role: OP AMP1 + internal reference form precision 2.5V reference node; OP AMP2 configured as transconductance amplifier driving MOSFET gate to regulate cathode current. Use Value: Maintains ±0.5% current accuracy from 0.5mA to 100mA with <2.5mV offset - eliminating need for matched resistor networks or external DACs. |
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 |
|---|---|---|---|
| TL103WBID | Wider supply (3–36V), extended temp (–40°C to 125°C), lower offset (±0.3mV), tighter ref tolerance (0.44% at 25°C), improved EMI rejection | Required for automotive under-hood or high-temp industrial designs; supports higher-voltage SMPS outputs | Select TL103WBID when operating above 105°C or needing <0.5mV offset; pin-compatible but not identical electrical behavior |
| LM358DR | No integrated reference; dual general-purpose op amp only; wider supply (3–32V); higher offset (±2mV); no cathode current capability | Requires external 2.5V reference (e.g., REF200) and additional passive components for CC/CV function | Choose LM358DR only if reference is already present elsewhere in design; adds ≥3 components and increases board area by ~30% |
Compared with TL103WBID, TL103WAID trades 20°C max junction temperature and 0.2mV offset for cost-sensitive volume production; versus LM358DR, it eliminates external reference sourcing, reduces layout complexity, and guarantees reference accuracy without calibration - delivering faster time-to-market for certified power designs.
Availability
TL103WAID is available at Aetrix Electronics and suitable for battery chargers, switch-mode power supplies, and linear voltage regulation requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.
Supply support for TL103WAID 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 power management technologies, with decades of expertise in precision analog ICs and power control solutions.
The TL103Wx family was developed specifically for cost-optimized, space-constrained power supply feedback - integrating dual op amps and a shunt reference to replace discrete implementations in battery charging and isolated DC/DC regulation.
FAQ
What is the maximum cathode current supported by TL103WAID?
The TL103WAID supports a maximum cathode current of 100mA, as specified in its absolute maximum ratings and confirmed in recommended operating conditions. This allows direct drive of high-gain optocouplers like PC817 or TLP3905 without external transistor buffering. The device maintains regulation across the full 0.5–100mA range, with dynamic impedance below 0.8Ω ensuring stable reference voltage under load transients. TL103WAID's cathode current capability is identical to TL103WBID but exceeds that of legacy TL103W.
Does TL103WAID require an external capacitor on the VREF pin for stability?
No, TL103WAID does not require an external capacitor on the VREF pin for basic stability - its internal shunt reference is compensated to operate stably without output capacitance. However, Figure 5-22 in the datasheet defines capacitive load limits: stability is guaranteed for ≤100nF at the cathode node. Larger capacitors (e.g., >1µF) may induce oscillation unless accompanied by series resistance per TI's application note SLVA757. TL103WAID's internal compensation eliminates the need for external RC networks in most CC/CV feedback applications.
Can TL103WAID operate from a single 5V supply?
Yes, TL103WAID is fully functional from a single 5V supply. Its input common-mode range extends from VCC– (ground) to VCC+ – 1.5V (3.5V), and its output swings within 20mV of the negative rail and up to 27V from the positive rail under 30V supply - meaning at 5V it delivers rail-to-rail compatible output swing. The internal 2.5V reference functions correctly with ≥2.5V headroom, making TL103WAID ideal for 5V-powered battery management ICs and USB-C PD controllers where mid-supply referencing is essential.
How does the input offset voltage of TL103WAID compare to TL103W?
TL103WAID specifies a maximum input offset voltage of ±0.5mV at 25°C, compared to ±1mV for TL103W - representing a 2× improvement in initial accuracy. Over full temperature (–40°C to 105°C), TL103WAID maintains ±5mV max, while TL103W degrades to ±5mV as well but with higher typical drift (±7µV/°C vs TL103WAID's ±7µV/°C). This tighter offset directly improves current-sense accuracy in battery chargers, enabling <1% CC regulation without factory trimming - a key differentiator TL103WAID brings over TL103W.
Is TL103WAID pin-compatible with TL103W and TL103WB?
Yes, TL103WAID is pin-compatible with both TL103W and TL103WB in the SOIC-8 (D) package - sharing identical pinout, footprint, and solder reflow profile. All three variants use pins 1–8 for 1OUT, 1IN–, 1IN+, VCC–, 2IN+, 2IN–, 2OUT, and VCC+. This allows direct replacement in existing designs, though system-level validation is required due to differences in reference tolerance (0.44% for TL103WAID vs 0.72% for TL103W) and thermal specs. TL103WAID serves as a validated upgrade path with no PCB changes needed.
TL103WAID Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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:
- 500 µV
- 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
TL103WAID FAQ
1.How can I place an order for TL103WAID through Aetrix?
Please submit a Request for Quotation (RFQ) for TL103WAID 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 TL103WAID reliable?
The price and inventory of TL103WAID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL103WAID is usually 5 days.
3.What payment methods are accepted for TL103WAID?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL103WAID transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL103WAID?
TL103WAID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL103WAID 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 TL103WAID?
For technical support, including TL103WAID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL103WAID requirements.
6.How does Aetrix verify that TL103WAID is sourced from the original manufacturer or authorized distributors?
All TL103WAID 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 TL103WAID meets industry standards.
7.What is the process for return or replacement of TL103WAID?
All TL103WAID units undergo pre-shipment inspection (PSI). If there is an issue with TL103WAID, 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 TL103WAID part is unused and in its original packaging.
Return procedure for TL103WAID:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL103WAID Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
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LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
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LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
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