Texas Instruments TPS38A010122DSKRQ1

Overview

TPS38A010122DSKRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive dual-channel overvoltage/undervoltage detector with 65 V input rating, 1 μA typical quiescent current, ±1.5% voltage threshold accuracy (2.7–36 V range), and programmable sense/reset delays via external capacitors. It monitors two independent supply rails in telematics control units and emergency call systems.

For engineers reviewing the TPS38A010122DSKRQ1 datasheet, TPS38A010122DSKRQ1 pinout, TPS38A010122DSKRQ1 application, or TPS38A010122DSKRQ1 equivalent, key selection considerations include its 65 V SENSE/VDD grading, dual-channel OV/UV detection with independent hysteresis, manual reset capability on both channels, and WSON-10 wettable flank package for AOI-compatible automotive PCB assembly.

Technical Context

The TPS38A010122DSKRQ1 implements two independent voltage monitoring channels with separate SENSE1/SENSE2 inputs and RESET1/RESET2 outputs. Each channel supports configurable OV or UV detection with user-selectable hysteresis (2–13% or fixed 0.5–2.5 V) and independent timing via CTSx (sense delay) and CTRx (reset delay) pins.

Its architecture features high-impedance SENSE inputs (≤2 µA max ISENSE at VIT >26 V), 65 V-rated VDD/SENSE/RESET pins, and output topology options: Channel 1 supports open-drain or push-pull with active-high/low logic, while Channel 2 is open-drain only. The device operates across –40°C to +125°C ambient temperature with no external resistor divider required for standard thresholds.

Key Specifications

Pinout & Package

TPS38A010122DSKRQ1 is packaged in a 10-pin WSON (DSK) with 2.5 mm × 2.5 mm body size and wettable flanks for automated optical inspection. The central thermal pad is non-conductive to meet IEC60664 creepage requirements between VDD and GND.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel voltage monitoring applications.

Compared with TPS38A010122DSKRQ1, the TPS3808G33QDBVRQ1 offers lower quiescent current but lacks dual-channel capability and 65 V tolerance, while the MAX6373HUT+T provides basic reset functionality at lower cost but fails to meet automotive voltage, qualification, and configurability requirements.

Availability

TPS38A010122DSKRQ1 is available at Aetrix Electronics and suitable for telematics control units, emergency call systems, and audio amplifiers requiring stable component supply across automotive production lifecycles.

Supply support for TPS38A010122DSKRQ1 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 company specializing in analog and embedded processing technologies, with leadership in automotive-grade power management and signal chain solutions.

The TPS38-Q1 product line delivers high-voltage, ultra-low-power voltage supervisors engineered specifically for AEC-Q100 Grade 1 automotive applications including ADAS, body electronics, and infotainment systems.

FAQ

What is the maximum input voltage rating for the SENSE pins on the TPS38A010122DSKRQ1?

The SENSE1 and SENSE2 pins on the TPS38A010122DSKRQ1 are rated for continuous operation up to 65 V, matching the VDD absolute maximum rating. This allows direct monitoring of 12 V and 24 V automotive battery rails without external voltage scaling or clamping circuits, provided external protection limits transient voltages to ≤70 V as specified in the absolute maximum ratings table.

How does the TPS38A010122DSKRQ1 achieve ±1.5% voltage threshold accuracy across temperature?

The TPS38A010122DSKRQ1 achieves ±1.5% voltage threshold accuracy (for 2.7–36 V range) through factory-trimmed internal reference circuitry and matched resistor ladders, validated across –40°C to +125°C ambient operating temperature. This specification is guaranteed in the electrical characteristics table under VITN and VITP parameters, with test conditions explicitly referencing full temperature range operation.

Can the TPS38A010122DSKRQ1 monitor two different voltage rails simultaneously?

Yes, the TPS38A010122DSKRQ1 independently monitors two voltage rails using dedicated SENSE1 and SENSE2 inputs. Each channel supports configurable OV or UV detection with separate hysteresis settings, sense delays (via CTS1/CTS2), and reset delays (via CTR1/CTR2), enabling simultaneous supervision of primary and backup supplies in safety-critical automotive systems.

What package type and dimensions does the TPS38A010122DSKRQ1 use?

The TPS38A010122DSKRQ1 uses a 10-pin WSON package (DSK variant) with nominal body dimensions of 2.5 mm × 2.5 mm. It features wettable flanks for automated optical inspection and a non-conductive thermal pad to ensure ≥0.5 mm creepage between VDD and GND per IEC60664 guidelines.

Does the TPS38A010122DSKRQ1 require external resistors for standard voltage thresholds?

No, the TPS38A010122DSKRQ1 integrates precision resistor ladders for standard thresholds (2.7–36 V and 800 mV options), eliminating external resistors and associated leakage current. External dividers are supported only when custom thresholds are needed, with the 800 mV option recommended to minimize ISENSE and maximize detection speed.