Texas Instruments TL4050C25IDBZTG4

Overview

TL4050C25IDBZTG4 from Texas Instruments is a precision 2.5V shunt voltage reference in SOT-23-3 package, rated for –40°C to 85°C operation, with ±0.5% initial tolerance, 50ppm/°C temperature coefficient, 41μVRMS wideband noise, and stable operation down to 60μA cathode current. It serves as a low-power, high-stability reference in portable data-acquisition front-ends.

For engineers reviewing the TL4050C25IDBZTG4 datasheet, TL4050C25IDBZTG4 pinout, TL4050C25IDBZTG4 application, or TL4050C25IDBZTG4 equivalent, key selection criteria include its C-grade accuracy, micropower operation, capacitor-free stability, and compatibility with 12-bit ADC systems requiring 2.5V reference rails.

Technical Context

The TL4050C25IDBZTG4 operates as a two-terminal shunt reference, sinking cathode current to maintain a precise 2.5V reverse breakdown voltage across its terminals. Its internal bandgap core delivers low dynamic impedance (0.3Ω at 1mA) and minimal thermal hysteresis (0.7mV), enabling stable regulation under varying load and temperature conditions.

Designed for direct integration into high-impedance bias networks and ADC reference inputs, it requires no external output capacitor and remains stable with all capacitive loads - a critical advantage over series references in space-constrained, low-quiescent-current designs.

Key Specifications

Pinout & Package

SOT-23-3 package (DBZ), surface-mount, 2.92mm × 1.3mm footprint, 1.45mm height, JEDEC MO-178AC compliant. Thermal resistance θ_JA = 206°C/W.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar shunt voltage reference applications.

Compared with REF3025AIDBZR and LM4040C25IDBZR, TL4050C25IDBZTG4 offers the lowest cost within its 50ppm/°C tempco class while maintaining identical SOT-23-3 layout compatibility and micropower capability - making it optimal for cost-sensitive, battery-operated industrial sensors.

Availability

TL4050C25IDBZTG4 is available at Aetrix Electronics and suitable for portable instrumentation, industrial power-supply monitors, and automotive cabin sensor nodes requiring stable component supply with guaranteed long-term sourcing.

Supply support for TL4050C25IDBZTG4 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 delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.

The TL4050 series was designed specifically for micropower, high-accuracy shunt reference applications in space-constrained, battery-operated systems - emphasizing low IQ, capacitor-free stability, and extended temperature performance.

FAQ

What is the operating temperature range for TL4050C25IDBZTG4?

The TL4050C25IDBZTG4 is specified for industrial temperature operation from –40°C to +85°C ambient. This range is confirmed in Section 5.4 (TL4050x25I Electrical Characteristics) of the official TI datasheet SLOS486B, and applies to all C-grade 2.5V variants in DBZ and DCK packages with "I" suffix.

Does TL4050C25IDBZTG4 require an output capacitor?

No, TL4050C25IDBZTG4 does not require an output capacitor. As stated in Section 8.1 and Section 3 of the TI datasheet, it is stable with all capacitive loads and designed for capacitor-free operation - eliminating BOM cost and layout complexity while maintaining regulation integrity.

What is the minimum cathode current needed for TL4050C25IDBZTG4 to regulate properly?

The TL4050C25IDBZTG4 requires a minimum cathode current of 60μA (typical) and 65μA (max over full temperature range) to maintain regulation. This value is explicitly listed in Table 5.4 under I_Z,min for TL4050C25I, and defines the lower bound for external bias resistor sizing in shunt configurations.

How does the pinout of TL4050C25IDBZTG4 differ from standard SOT-23-3 op-amps or regulators?

TL4050C25IDBZTG4 uses a nonstandard SOT-23-3 pinout: Pin 1 = Anode (GND), Pin 2 = Cathode (2.5V output), Pin 3 = No-Connect (must float or tie to Pin 2). This differs from op-amps (e.g., Pin 2 = inverting input) and series regulators (e.g., Pin 2 = VOUT), and is documented in Figure 4-1 and Section 8.2 of the TI datasheet.

Can TL4050C25IDBZTG4 replace TL4050A25IDBZT in an existing design?

Yes, TL4050C25IDBZTG4 can replace TL4050A25IDBZT on a functional basis - both share identical SOT-23-3 (DBZ) package, pinout, and 2.5V nominal output - but TL4050C25IDBZTG4 has looser ±0.5% initial tolerance versus ±0.1% for the A-grade part. System-level accuracy validation is required if the original design relied on A-grade precision.