AMC7812SPAPR datasheet(5/92 Pages) TI

5 / 92 page

AMC7812

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SBAS513E – JANUARY 2011 – REVISED SEPTEMBER 2013

ELECTRICAL CHARACTERISTICS (continued)

At TA = –40°C to +105°C, AVDD = DVDD = 4.5V to 5.5V, AVCC = +15V, AGND = DGND = 0V, IOVDD = 2.7V to 5.5V, internal

2.5V reference, and the DAC output span = 0V to 5V, unless otherwise noted.

AMC7812

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

ADC REFERENCE INPUT

Reference input voltage range

1.2

AVDD

Input current

VREF = 2.5V

145

µA

INTERNAL ADC REFERENCE BUFFER

Offset

TA = +25°C

±5

INTERNAL TEMPERATURE SENSOR

Operating range

–40

+125

°C

AVDD = 5V, TA = –40°C to +125°C

±1.25

±2.5

°C

Accuracy

AVDD = 5V, TA = 0°C to +100°C

±1.5

°C

Resolution

Per LSB

0.125

°C

Conversion rate

External temperature sensors are disabled

EXTERNAL TEMPERATURE SENSOR (Using 2N3906 external transistor)

Operating range

Limited by external diode

–40

+150

°C

AVDD = 5V, TA = 0°C to +100°C,

±1.5

°C

TD = –40°C to +150°C

Accuracy(6)(7)

AVDD = 5V, TA = –40°C to +100°C,

±2

°C

TD = –40°C to +150°C

Resolution

Per LSB

0.125

°C

With resistance cancellation

100

(RC bit = '1')

Conversion rate per sensor

Without resistance cancellation

(RC bit = '0')

DIGITAL LOGIC: GPIO(8)(9) and ALARM

IOVDD = +5V

2.1

0.3 + IOVDD

VIH

Input high voltage

IOVDD = +3.3V

2.1

0.3 + IOVDD

IOVDD = +5V

–0.3

0.8

VIL

Input low voltage

IOVDD = +3.3V

–0.3

0.8

IOVDD = +5V, sinking 5mA

0.4

VOL

Output low voltage

IOVDD = +3.3V, sinking 2mA

0.4

High-impedance leakage

µA

High-impedance output capacitance

(6)

TD is the external diode temperature.

(7)

Auto conversion mode disabled

(8)

For pins GPIO0-3, the external pull up resistor must be connected to a voltage less than or equal to 5.5V.

(9)

For pins GPIO4-7, the external pull up resistor must be connected to a voltage less than or equal to AVDD.

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