MPXY8020A6T1 데이터 시트보기 (PDF) - Freescale Semiconductor

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MPXY8020A6T1

Tire Pressure Monitoring Sensor Temperature Compensated and Calibrated, Fully Integrated, Digital Output

Freescale Semiconductor 

PX

PREF

P-Cell

Clock

Gen

fHF

Internal HF

OSC.

C to V

Convert

AMP

Power

Control

P-Off

P-Gain

P-TCO P-TCS

Trim

Trim

Trim

Trim

T-Off

8-Bit

Current

8-Bit

D/A

Trim

Source

Register

2-Chan

MUX

t

PTC

Res.

AVSS

2-Chan

MUX

VDD

S1

Digital

S0

Control

Data

CLK

Internal LF

OSC.

f LF

14-Stage

Divider

Lock

10-Stage

Divider

RST

-

COMP

+

Sample CAP

AVSS

3-Chan

MUX

OUT

VSS

AVSS

Figure 1. MPXY8000 Series Sensor Block Diagram

Operating Modes

The device has several operating modes dependent on

the applied voltages to the S1 and S0 pins as shown in

Table 1. In all the modes listed the channel multiplexers, D/A

Register, LFO, and the output pulse dividers will always be

powered up as long as there is a voltage source connected to

the VDD pin.

When only the S0 pin is at a logic one the pressure

measuring circuit in the device is powered up and the

pressure output signal is connected to the sample capacitor

through a multiplexer. When the S0 pin returns to the low

state the multiplexer will first turn off to store the signal on the

sample capacitor before powering down the measuring

circuitry.

When only the S1 pin is at a logic one the temperature

measuring circuit in the device is powered up and the

temperature output signal is connected to the sample

capacitor through a multiplexer. When the S1 pin returns to

the low state the multiplexer will first turn off to store the signal

on the sample capacitor before powering down the

measuring circuitry.

NOTE: All of the EEPROM trim bits will be powered up

regardless of whether the pressure or temperature

measuring circuitry is activated.

NOTE: If the voltage on the S1 pin exceeds 2.5 times the

voltage on the VDD pin the device will be placed into its Trim/

Test Mode.

NOTE: If the VDD supply source is switched off in order to

reduce current consumption, it is important that all input pins

be driven LOW to avoid powering up the device.

If any input pin (S1, S0, DATA, or CLK) is driven HIGH

while the VDD supply is switched off, the device may be

powered up through an ESD protection diode. In such a case,

the effective VDD voltage will be about 0.3 V less than the

voltage applied to the input pin, and the full device IDD current

will be drawn from the device driving input.

MPXY8000

2

Sensor Devices

Freescale Semiconductor

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