TMUX7462F中文資料德州儀器數(shù)據(jù)手冊PDF規(guī)格書

1 Features

? Wide supply range: 8 V to 44 V single supply

±5 V to ±22 V dual supply

? Channel protector without need for dedicated

select pin per channel

– Reduces number of control logic signals to

route across PCB

? Integrated fault protection:

– Overvoltage protection, source to supplies or

source to drain: ±85 V

– Overvoltage protection: ±60 V

– Powered-off protection: ±60 V

– Interrupt flags to indicate fault status

– Adjustable overvoltage triggering thresholds

? VFP: 3 V to VDD, VFN: 0 V to VSS

– Adjustable output behavior (clamped or open)

during fault

? Latch-up immunity by device construction

? 6 kV human body model (HBM) ESD rating

? Low On-Resistance: 8.3 Ω typical

? Flat On-Resistance: 5 mΩ typical

? Industry-standard TSSOP and smaller WQFN

package

2 Applications

? Factory automation and control

? Programmable logic controllers (PLC)

? Analog input modules

? Semiconductor test equipment

? Battery test equipment

? Servo drive control module

? Data acquisition systems (DAQ)

3 Description

The TMUX7462F is a four-channel protector that

can be placed on the front end of a signal path

to protect sensitive components downstream from

damage caused by overvoltage faults. Each of the

4 channels has an internal switch that is turned-off

automatically upon occurrence of an overvoltage fault

without the need of external controls. This simplifies

robust system level protection designs by removing

the need for control signals for each channel of

the device. The overvoltage protection is available

in powered and powered-off conditions, making the

TMUX7462F suitable for applications where power

supply sequencing cannot be precisely controlled.

The switch channels remain in the high impedance

state (regardless of switch input conditions) when the

devices power supplies are floating, grounded, or at

a level that is below the undervoltage (UV) threshold.

If the signal level on any Sx pin exceeds the fault

supply (VFP or VFN) by a threshold voltage (VT), then

the Sx pin becomes high impedance and an output

fault flag is asserted low to indicate a fault condition

under normal operation. The drain pin (Dx) is either

pulled to the fault supply voltage that was exceeded

or left floating depending on the DR control logic.

The device operates with dual supplies (±5 V to ±22

V), a single supply (8 V to 44 V), or asymmetric

supplies. The low and flat on-resistance of the device

makes the TMUX7462F an excellent solution for data

acquisition applications where excellent linearity and

low distortion is critical.