Texas Instruments TPS37A010122DSKR

Overview

TPS37A010122DSKR from Texas Instruments is a dual-channel overvoltage and undervoltage (OV/UV) supervisor IC designed for high-reliability industrial power monitoring. It features independent 65 V-rated SENSE1 (OV) and SENSE2 (UV) inputs, 1 µA typical quiescent current, programmable sense/reset delays via external capacitors, and operates across –40°C to +125°C. Used in servo drive functional safety modules to monitor 24 V supply rails with precision threshold accuracy.

For engineers reviewing the TPS37A010122DSKR datasheet, TPS37A010122DSKR pinout, TPS37A010122DSKR application, or TPS37A010122DSKR equivalent, this device supports critical voltage window supervision in factory automation, motor drives, and HVAC actuator control where supply rail integrity must be validated before system enable.

Technical Context

The TPS37A010122DSKR implements two independent comparators with internal precision reference and integrated resistor dividers - enabling fixed-threshold OV/UV detection without external resistors. SENSE1 monitors overvoltage conditions with VITP = 12.2 V ±1.5%, while SENSE2 monitors undervoltage with VITN = 10.1 V ±1.5%, both with user-selectable hysteresis (2–13% or fixed 0.5–2.5 V).

Its dual delay architecture uses internal timing resistors (RCTS ≈ 100 kΩ, RCTR ≈ 1000 kΩ) to convert external capacitor values into precise sense (CTS1/CTS2) and reset (CTR1/CTR2) delays - e.g., 10 nF yields 1.28 ms sense delay and 12.8 ms reset delay per channel. Manual reset (MR) functionality is implemented via active-low logic on CTR1/CTR2 pins.

Key Specifications

Pinout & Package

TPS37A010122DSKR is packaged in a 10-pin WSON (DSK) package with 2.5 mm × 2.5 mm body size and non-conductive thermal pad for enhanced creepage per IEC60664.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS37A010122DYY, the TPS37A010122DSKR offers smaller footprint and better thermal performance; compared with TLV809E24DBZR, it delivers full 65 V window supervision with programmable delays and functional safety documentation - making it irreplaceable in industrial motor control and HVAC safety-critical designs.

Availability

TPS37A010122DSKR is available at Aetrix Electronics and suitable for industrial analog input modules, PLC CPU power sequencing, and servo drive functional safety modules requiring stable component supply across extended temperature and high-voltage operating conditions.

Supply support for TPS37A010122DSKR 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 for industrial, automotive, and communications markets.

The TPS37 family was engineered specifically for high-voltage industrial power supervision - delivering ultra-low quiescent current, wide-VIN robustness, and configurable OV/UV window detection to replace discrete resistor-divider supervisors in factory automation and motor control systems.

FAQ

What is the exact voltage threshold configuration of TPS37A010122DSKR?

The TPS37A010122DSKR has fixed thresholds: SENSE1 (overvoltage) triggers at 12.2 V ±1.5%, and SENSE2 (undervoltage) triggers at 10.1 V ±1.5%. These values are laser-trimmed during manufacturing and do not require external resistor networks. The "A010122" suffix explicitly denotes this 10.1 V / 12.2 V window variant, confirmed in TI's device nomenclature table.

Does TPS37A010122DSKR support push-pull or only open-drain outputs?

The TPS37A010122DSKR supports both output topologies. Its RESET1 and RESET2 outputs can be configured as either open-drain or push-pull via factory programming - the DSK package variant shipped as TPS37A010122DSKR uses open-drain outputs (RESET2_UVOD designation confirms this). Push-pull variants exist in the same family but carry different suffixes (e.g., "PP").

How is the reset delay time calculated for TPS37A010122DSKR?

The reset delay time for TPS37A010122DSKR is determined by the external capacitor on CTR1 or CTR2 and the internal RCTR ≈ 1000 kΩ resistor: tCTR ≈ RCTR × CCTR. For example, a 100 nF capacitor yields ~100 ms delay (1000 kΩ × 100 nF), and 10 µF yields ~12.8 s. This relationship is validated in Figure 7-22 of the datasheet and applies identically to both channels.

Can TPS37A010122DSKR monitor supply voltages higher than its VDD pin voltage?

Yes. TPS37A010122DSKR decouples SENSE1 and SENSE2 from VDD - allowing SENSE pins to monitor up to 65 V even when VDD is supplied at only 2.7 V. This enables direct monitoring of 48 V rails while powering the IC from a lower-voltage LDO, improving system efficiency and simplifying power architecture in multi-rail industrial systems.

Is TPS37A010122DSKR qualified for functional safety applications?

Yes. TPS37A010122DSKR is functional safety-capable, with documentation available for ISO 13849 and IEC 61508 system design. It includes features essential for safety architectures: independent dual-channel monitoring, built-in hysteresis to prevent chatter, guaranteed timing behavior (tCTS/tCTR), and operation across –40°C to +125°C - all verified in TI's functional safety FIT report and FMEDA analysis.