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TIC12400QDCPRQ1

Automotive 35-V multi-switch detection interface (MSDI) with SPI & integrated ADC

Manufacturer:

Texas Instruments, Inc
Mfr.Part #:

TIC12400QDCPRQ1
Datasheet:

TIC12400QDCPRQ1 Datasheet (PDF)
Series:

Automotive, AEC-Q100
Applications:

Automotive, Switch Monitoring
Interface:

MSDI (Multiple Switch Detection)
Voltage - Supply:

4.5V ~ 35V
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TIC12400QDCPRQ1 General Description

The TIC12400-Q1 is an advanced Multiple Switch Detection Interface (MSDI) designed to detect external switch status in a 12-V automotive system. The TIC12400-Q1 features an integrated 10-bit ADC to monitor multi-position analog switches and a comparator to monitor digital switches independently of the MCU. Detection thresholds can be programmed for the ADC and the comparator to support various switch topologies and system non-idealities. The device monitors 24 direct switch inputs, with 10 inputs configurable to monitor switches connected to either ground or battery. 6 unique wetting current settings can be programmed for each input to support different application scenarios. The device supports wake-up operation on all switch inputs to eliminate the need to keep the MCU active continuously, thus reducing power consumption of the system. The TIC12400-Q1 also offers integrated fault detection, ESD protection, and diagnostic functions for improved system robustness. The TIC12400-Q1 supports 2 modes of operations: continuous and polling mode. In continuous mode, wetting current is supplied continuously. In polling mode, wetting current is turned on periodically to sample the input status based on a programmable timer, thus the system power consumption is significantly reduced.

Key Features

Qualified for automotive applications
AEC-Q100 qualified with the following results:
- Device temperature grade 1: –40°C to 125°C ambient operating temperature
- Device HBM ESD classification level H2
- Device CDM ESD classification level C4B
Functional Safety-Capable
- Documentation available to aid functional safety system design
Designed to support 12 V automotive systems with over-voltage and under-voltage warning
Monitors up to 24 direct switch inputs with 10 inputs configurable to monitor switches connected to either ground or battery
Switch input withstands up to 40 V (load dump condition) and down to −24 V (reverse polarity condition)
6 configurable wetting current settings: (0 mA, 1 mA, 2 mA, 5 mA, 10 mA, and 15 mA)
Integrated 10-bit ADC for multi-position analog switch monitoring
Integrated comparator with 4 programmable thresholds for digital switch monitoring
Ultra-low operating current in polling mode: 68 µA typical (t_POLL = 64 ms, t_{POLL_ACT} = 128 µs, all 24 inputs active, comparator mode, all switches open)
Interfaces directly to MCU using 3.3 V / 5 V serial peripheral interface (SPI) protocol
Interrupt generation to support wake-up operation on all inputs
Integrated battery and temperature sensing
±8 kV contact discharge ESD protection on input pins per ISO-10605 with appropriate external components
38-Pin TSSOP package

Specifications

Category	Integrated Circuits (ICs)InterfaceSpecialized	Series	Automotive, AEC-Q100
Applications	Automotive, Switch Monitoring	Interface	MSDI (Multiple Switch Detection)
Voltage - Supply	4.5V ~ 35V	Mounting Type	Surface Mount
Base Product Number	TIC12400

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Ratings and Reviews

S**y 04/21/2024

Until i can say nothing just have to check i think it will work will work

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Avaq's prompt delivery and excellent customer service have truly impressed me. The TQP3M9005 components arrived well-packaged and in perfect condition. Avaq sets the bar high for others in the industry.

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All OK. Well-packed. Will use this supplier again.

K**y 05/04/2020

Thank you very much ..