CD1030: 33 channel Multiple Switch Detection Interface with Programmable Current

Overview

The CD1030 is a multiple switch detection interface (MSDI) designed to detect the closing and opening of up to 33 switch contacts. The switch status, either open or closed, is transferred to the microprocessor through a SPI in automotive environments.

This SMARTMOS^® device features a 35-to-1 analog multiplexer for reading analog inputs.
The analog input signal is buffered and provided on the analog multiplexer (AMUX) output pin for the MCU to read
Individually selectable input currents are available in Normal and Low-Power Mode
Battery and temperature monitor are included in the IC and available via the AMUX pin
Interfaces with any MCU that supports SPI communications

Features

Fully functional operation 4.5V ≤ VBATP ≤ 36V
Full parametric operation 6.0V ≤ VBATP ≤ 28V
Operating switch input voltage range from -1.0V to 36V
12 programmable inputs (switches to battery or ground)
21 switch-to-ground inputs
Selectable wetting current (2.0, 6.0, 8.0, 10, 12, 14, 16, or 20mA)
Interfaces directly to an MCU using 3.3V/5.0V SPI protocol
Selectable wake-up on change of state
Typical standby current IBATP = 50uA and IDDQ = 10uA
Active interrupt (INT_B) on switch state change
Integrated battery and temperature sensing

Features

Fully functional operation 4.5V ≤ VBATP ≤ 36V
Full parametric operation 6.0V ≤ VBATP ≤ 28V
Operating switch input voltage range from -1.0V to 36V
12 programmable inputs (switches to battery or ground)
21 switch-to-ground inputs
Selectable wetting current (2.0, 6.0, 8.0, 10, 12, 14, 16, or 20mA)
Interfaces directly to an MCU using 3.3V/5.0V SPI protocol
Selectable wake-up on change of state
Typical standby current IBATP = 50uA and IDDQ = 10uA
Active interrupt (INT_B) on switch state change
Integrated battery and temperature sensing

Application Notes

CD1030 Functional Internal Block Diagram

CD1030 Functional Internal Block Diagram

CD1030 Device Image

CD1030 Device Image

CD1030 Functional Internal Block Diagram
CD1030 Device Image

CD1030 Functional Internal Block Diagram

CD1030 Functional Internal Block Diagram

CD1030 Device Image

CD1030 Device Image

Key Parametrics

Device Function

switch monitoring
Package Termination Count

48
Package Type

HLQFP48
Load Supply Voltage (Min) (V)

4.5
Load Supply Voltage (Max) (V)

36
Interface and Input Control

SPI / SPI
Ambient Operating Temperature (Min to Max) (℃)

-40 to 125

Development Boards and Designs

FRDM-CD1030EVM : FRDM-CD1030EVM Switch Detection interface Evaluation Kit thumbnail

FRDM-CD1030EVM:FRDM-CD1030EVM Switch Detection interface Evaluation Kit

Evaluation and Development Boards

Development Boards and Designs

FRDM-CD1030EVM : FRDM-CD1030EVM Switch Detection interface Evaluation Kit thumbnail

FRDM-CD1030EVM:FRDM-CD1030EVM Switch Detection interface Evaluation Kit

Evaluation and Development Boards

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