AMC7812B datasheet(5/92 Pages) TAOS

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AMC7812B

www.ti.com

SBAS625A – SEPTEMBER 2013 – REVISED SEPTEMBER 2013

ELECTRICAL CHARACTERISTICS (continued)

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

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

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

INTERNAL ADC REFERENCE BUFFER

Offset

TA = +25°C

±5

INTERNAL TEMPERATURE SENSOR

Operating range

–40

+125

°C

AVDD = 5 V, TA = –40°C to +125°C

±1.25

±2.5

°C

Accuracy

AVDD = 5 V, 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 = 5 V, TA = 0°C to +100°C,

±1.5

°C

TD = –40°C to +150°C

Accuracy(5)(6)

AVDD = 5 V, 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(7)(8) and ALARM

IOVDD = +5 V

2.1

0.3 + IOVDD

VIH

Input high voltage

TA = –40°C to +125°C, IOVDD = +3.3 V

2.2

0.3 + IOVDD

IOVDD = +5 V

–0.3

0.8

VIL

Input low voltage

TA = –40°C to +125°C, IOVDD = +3.3 V

–0.3

0.7

TA = –40°C to +125°C, IOVDD = +5 V, sinking 5 mA

0.4

VOL

Output low voltage

TA = –40°C to +125°C, IOVDD = +3.3 V,

0.4

sinking 2 mA

High-impedance leakage

µA

High-impedance output capacitance

DIGITAL LOGIC: All Except SCL, SDA, ALARM, and GPIO

IOVDD = +5 V

2.1

0.3 + IOVDD

VIH

Input high voltage

TA = –40°C to +125°C, IOVDD = +3.3 V

2.2

0.3 + IOVDD

IOVDD = +5 V

–0.3

0.8

VIL

Input low voltage

TA = –40°C to +125°C, IOVDD = +3.3 V

–0.3

0.7

Input current

±1

µA

Input capacitance

IOVDD = +5 V, sourcing 3 mA

4.8

VOH

Output high voltage

IOVDD = +3.3 V, sourcing 3 mA

2.9

IOVDD = +5 V, sinking 3 mA

0.4

VOL

Output low voltage

IOVDD = +3.3 V, sinking 3 mA

0.4

High-impedance leakage

±5

µA

High-impedance output capacitance

(5)

TD is the external diode temperature.

(6)

Auto conversion mode disabled.

(7)

For pins GPIO0 to GPIO3, the external pull-up resistor must be connected to a voltage less than or equal to 5.5 V.

(8)

For pins GPIO4 to GPIO7, the external pull-up resistor must be connected to a voltage less than or equal to AVDD.

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