SA56004GD datasheet(22/36 Pages) NXP

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SA56004X_5

Product data sheet

Rev. 05 — 22 May 2008

22 of 36

NXP Semiconductors

SA56004X

Digital temperature sensor with overtemperature alarms

10. Characteristics

[1]

The SA56004X is optimized for 3.3 V VDD operation.

[2]

Deﬁnition of Under Voltage Lockout (UVL): The value of VDD below which the internal A/D converter is disabled. This is designed to be a

minimum of 200 mV above the power-on reset. During the time that it is disabled, the temperature that is in the ‘read temperature

registers’ will remain at the value that it was before the A/D was disabled. This is done to eliminate the possibility of reading unexpected

false temperatures due to the A/D converter not working correctly due to low voltage. In case of power-up (rising VDD), the reading that

is stored in the ‘read temperature registers’ will be the default value of 0

°C. V

DD will rise to the value of the UVL, at which point the A/D

will function correctly and the normal temperature will be read.

[3]

VDD (rising edge) voltage below which the A/D converter is disabled.

[4]

VDD (falling edge) voltage below which the logic is reset.

Table 18.

Electrical characteristics

VDD = 3.0 V to 3.6 V; Tamb = −40 °C to +125 °C; unless otherwise speciﬁed.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

TERRL

local temperature error

Tamb = +60 °C to +100 °C

−2

±1+2

°C

Tamb = −40 °C to +125 °C

−3-

°C

TERRR

remote temperature error

Tamb = +25 °C to +85 °C;

TRD = +60 °C to +100 °C

−1-

°C

Tamb = −40 °C to +85 °C;

TRD = −40 °C to +125 °C

−3-

°C

TRESR

remote temperature

resolution

bit

0.125

°C

TRESL

local temperature resolution

bit

0.125

°C

Tconv

conversion period

VDD

supply voltage

[1] 3.0

5.5

IDD

quiescent current

during conversion,

16 Hz conversion rate

500

µA

shut-down current

SMBus inactive

µA

IRD

remote diode source current

high setting: D+

− D− = +0.65 V

160

µA

low setting

µA

UVL

UnderVoltage Lockout (UVL)

threshold voltage[2]

VDD input disables A/D

conversion

[3] 2.6

2.95

Power-On Reset (POR)

threshold voltage

VDD input falling edge

[4] 1.8

2.4

local and remote ALERT high

default temperature settings

default values set at power-up

+70

°C

local and remote ALERT low

default temperature settings

default values set at power-up

°C

local and remote T_CRIT

default temperature settings

default values set at power-up

+85

°C

T_CRIT hysteresis

default value set at power-up

+10

°C

ALERT and T_CRIT output

saturation voltage

IO = 6.0 mA

0.4

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