Texas Instruments TPS37A010122DSKRQ1

Overview

TPS37A010122DSKRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive dual-channel overvoltage/undervoltage detector with independent SENSE1 (OV) and SENSE2 (UV) monitoring, 1 µA typical quiescent current, 1% threshold accuracy (800 mV or 2.7–36 V options), and programmable sense/reset delays via external capacitors. It operates directly from 12 V/24 V battery rails in telematics control units and emergency call systems.

For engineers reviewing the TPS37A010122DSKRQ1 datasheet, TPS37A010122DSKRQ1 pinout, TPS37A010122DSKRQ1 application, or TPS37A010122DSKRQ1 equivalent, key selection factors include its 65 V-rated SENSE/VDD pins, dual independent OV/UV detection with hysteresis options (2–13% or fixed 0.5–2.5 V), push-pull/open-drain output topology, and WSON-10 (DSK) package with wettable flanks for AOI compatibility.

Technical Context

The TPS37A010122DSKRQ1 implements two independent voltage monitoring channels: SENSE1 detects overvoltage conditions with active-high or active-low reset assertion after a user-programmable sense delay (CTS1) and reset delay (CTR1); SENSE2 detects undervoltage conditions with matching timing control (CTS2/CTR2). Each channel uses high-impedance inputs (≤2 µA max ISENSE at 65 V) and supports external resistor dividers or direct connection to monitored rails up to 65 V.

Its internal architecture includes a precision bandgap reference, programmable hysteresis (2–13% or fixed values), POR circuitry with 1.4 V VPOR, and functional safety documentation support. The device lacks internal clamps-external protection is required to limit pin voltages to ≤70 V per absolute maximum ratings.

Key Specifications

Pinout & Package

TPS37A010122DSKRQ1 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 exposed 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 supervisor applications.

Compared with TLV809E33DBVR and MAX6375XR37+T, the TPS37A010122DSKRQ1 uniquely delivers automotive-grade dual OV/UV supervision with independent timing control, 65 V pin tolerance, and wettable-flank packaging - making it irreplaceable for safety-critical automotive power integrity monitoring.

Availability

TPS37A010122DSKRQ1 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 TPS37A010122DSKRQ1 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 automotive ICs with decades of automotive qualification expertise.

The TPS37-Q1 product line was designed specifically for AEC-Q100-compliant automotive voltage supervision - addressing the need for high-voltage, low-IQ, dual-threshold monitoring in battery-connected ECUs.

FAQ

What is the exact threshold configuration for TPS37A010122DSKRQ1?

The TPS37A010122DSKRQ1 is a fixed-threshold variant with 800 mV undervoltage detection on SENSE2 and overvoltage detection on SENSE1 configured for 12 V nominal systems. Its part number suffix "010122" decodes to Channel 1 OV = 12.2 V (±1%), Channel 2 UV = 0.8 V (±1%), hysteresis = 2%, and output topology = push-pull active-low. This configuration is factory-trimmed and non-adjustable.

Does TPS37A010122DSKRQ1 require external resistors for voltage sensing?

No, TPS37A010122DSKRQ1 does not require external resistors for its 800 mV and 12.2 V thresholds - these are internally trimmed. External resistors are only needed if custom thresholds outside the factory-set values are required, leveraging the high-impedance SENSE inputs (≤2 µA leakage at 65 V).

Can TPS37A010122DSKRQ1 monitor different voltage domains simultaneously?

Yes, TPS37A010122DSKRQ1 supports independent voltage domains: VDD may be supplied from a 3.3 V LDO while SENSE1 and SENSE2 monitor separate 12 V and 48 V rails up to 65 V. The absence of internal clamps requires external TVS diodes to limit pin stress to ≤70 V absolute maximum.

What is the minimum capacitor value for reliable CTS1/CTS2 operation?

The minimum recommended capacitor for CTS1 and CTS2 is 10 nF, yielding 1.28 ms sense delay. Values below 1 nF cause timing inaccuracies due to parasitic capacitance dominance; TI specifies 10 nF–10 µF as the validated range for 1.28 ms–1.28 s delay coverage with <5% error across temperature.

Is TPS37A010122DSKRQ1 pin-compatible with other TPS37-Q1 variants?

Yes, all TPS37-Q1 devices in the WSON-10 (DSK) package share identical pinout and footprint, including TPS37A010122DSKRQ1. This allows drop-in replacement across threshold, hysteresis, and output topology variants without PCB redesign - provided system-level timing and voltage requirements align.