Automotive 35-V multi-switch detection interface (MSDI) with SPI & integrated ADC
Product details
Parameters
Package | Pins | Size
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
- 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 (tPOLL = 64 ms, tPOLL_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
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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.
Technical documentation
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
Features
- EVM connects to a computer using USB cable and lets you program configurations and read status information
- EVM incorporates temperature and current measurements by using the GUI and has many configurable hardware options
- Kit features the ability to do digital switches and resistor coded switches or (...)
Design tools & simulation
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
- (...)
Reference designs
Design files
-
download TIDA-01237 BOM.pdf (66KB) -
download TIDA-01237 Assembly Drawing.pdf (294KB) -
download TIDA-01237 PCB.pdf (1465KB) -
download TIDA-01237 CAD Files.zip (1106KB) -
download TIDA-01237 Gerber.zip (1863KB)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
HTSSOP (DCP) | 38 | View options |
Ordering & quality
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- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
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Support & training
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