LM93 datasheet(82/95 Pages) TI1

82 / 95 page

LM93

SNAS210E – DECEMBER 2003 – REVISED MARCH 2013

www.ti.com

4.2

Operating Ratings

(1) (2)

Operating Temperature Range

0°C

≤ TA ≤ +85°C

Nominal Supply Voltage

3.3V

Supply Voltage Range (VDD)

+3.0V to +3.6V

VID0-VID5

−0.05V to +5.5V

Digital Input Voltage Range

−0.05V to (VDD + 0.05V)

Package Thermal Resistance (3)

79°C/W

(1)

Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for

which the device is functional, but do not ensure specific performance limits. For ensured specifications and test conditions, see the DC

Electrical Characteristics. The ensured specifications apply only for the test conditions listed. Some performance characteristics may

degrade when the device is not operated under the listed test conditions.

(2)

All voltages are measured with respect to GND, unless otherwise noted.

(3)

The maximum power dissipation must be de-rated at elevated temperatures and is dictated by TJMAX, θJA and the ambient temperature,

TA. The maximum allowable power dissipation at any temperature is PD = (TJMAX − TA) / θJA. The θJAfor the LM93 when mounted to 1

oz. copper foil PCB the

θJA with different air flow is listed in the following table.

Air Flow

Junction to Ambient Thermal Resistance,

θJA

0 m/s

79 °C/W

1.14 m/s (225 LFPM)

62 °C/W

2.54 m/s (500 LFPM)

52 °C/W

4.3

DC Electrical Characteristics

The following limits apply for +3.0 VDC to +3.6 VDC, unless otherwise noted. Bold face limits apply for TA = TJ over TMIN to

TMAX of the operating range; all other limits TA = TJ = 25°C unless otherwire noted. TA is the ambient temperature of the

LM93; TJ is the junction temperature of the LM93; TD is the junction temperature of the thermal diode.

Typical

Limits

Units

Symbol

Parameter

Conditions

(1)

(2)

(Limits)

POWER SUPPLY CHARACTERISTICS

Power Supply Current

Converting, Interface and

mA (max)

Fans Inactive, Peak Current

Converting, Interface and

Fans Inactive, Average

0.9

Current

Power-On Reset Threshold Voltage

1.6

V (min)

2.7

V (max)

TEMPERATURE-TO-DIGITAL CONVERTER CHARACTERISTICS

Local Temperature Accuracy Over Full Range

0°C TA ≤85°C

±2

±3

°C (max)

TA = +55°C

±1

±2.8

°C (max)

Local Temperature Resolution

°C

Remote Thermal Diode Temperature Accuracy Over

0°C

≤ TA ≤ 85°C

Full Range; targeted for a typical Prescott processor

and 25°C

≤ TD ≤ 100°C

±3

°C (max)

(3)

Remote Thermal Diode Temperature Accuracy;

0°C

≤ TA ≤ 85°C

±1

°C

targeted for a typical Prescott processor (3)

and 25°C

≤ TD ≤ 70°C

Remote Temperature Resolution

°C

Thermal Diode Source Current

High Level

188

280

µA (max)

Low Level

11.75

µA

Thermal Diode Current Ration

Total Monitoring Cycle Time

100

ms (max)

(1)

Typical parameters are at TJ = TA = 25 °C and represent most likely parametric norm.

(2)

Limits are specified to TI's AOQL (Average Outgoing Quality Level).

(3)

When measuring an MMBT3904 transistor, 4 °C should be subracted from all temperature readings.

Electrical Specifications

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