AMC7891_15 datasheet(8/41 Pages) TI

Part #	AMC7891

Description	Analog Monitor and Control Circuit with 10-Bit, Multi-Channel ADC and Four DACs, Temperature Sensor, and 12 GPIOs

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Manufacturer	TI [Texas Instruments]

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AMC7891

SBAS518A

– AUGUST 2011 – REVISED DECEMBER 2011

www.ti.com

ELECTRICAL CHARACTERISTICS

– GENERAL SPECIFICATIONS

AVDD = 4.75 to 5.5 V, GPIOVDD = 1.8 to 5.5 V, SPIVDD = 1.8 to 5.5 V, AGND = DGND = 0 V, External ADC reference = AVDD,

TA = –40°C to 105°C (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

GENERAL PURPOSE I/O

GPIOVDD = 1.8 V

0.7

×GPIOVDD

V

VIH

High-level input voltage

GPIOVDD = 3.3 to 5.5 V

2.1

V

GPIOVDD = 1.8 V

0.3

V

VIL

Low-level input voltage

GPIOVDD = 3.3 to 5.5 V

0.8

V

Iload = 1.6 mA, GPIOVDD = 1.8V, All GPIOs

GPIOVDD - 0.25

V

loaded and set to

'1'

VOH

High-level output voltage

Iload = 1.6 mA, GPIOVDD = 3.3 to 5.5V, All

GPIOVDD - 0.2

V

GPIOs loaded and set to

'1'

VOL

Low-level output voltage

Iload = -1.6 mA, All GPIOs loaded

0.4

V

Input capacitance (1)

1

pF

High impedance output

1

pF

capacitance (1)

LOGIC INPUTS: CS, SDI, SCLK

SPIVDD = 1.8 V

0.7

×SPIVDD

V

VIH

High-level input voltage

SPIVDD = 3.3 to 5.5 V

2.1

V

SPIVDD = 1.8 V

0.3

V

VIL

Low-level input voltage

SPIVDD = 3.3 to 5.5 V

0.7

V

Input current

±1

µA

Input capacitance (1)

1

pF

High impedance output

1

pF

capacitance (1)

LOGIC OUTPUT: SDO

VOH

High-level output voltage

Iload = 1.6 mA

SPIVDD - 0.2

V

VOL

Low-level output voltage

Iload = -1.6 mA

0.4

V

LOGIC OUTPUT: DAV

VOL

Low-level output voltage

Iload = -2 mA

0.4

V

POWER REQUIREMENTS

AVDD

4.75

5

5.5

V

GPIOVDD

1.8

5.5

V

SPIVDD

1.8

5.5

V

Total supply current, AVDD +

IDD

Operating mode(2)

6.5

10

mA

GPIOVDD + SPIVDD

Power down mode

1.25

2

mA

Power consumption

Operating mode(2)

32.5

55

mW

Power down mode

6.25

11

mW

OPERATING RANGE

Specified temperature range

–40

25

105

°C

(1)

Specified by design. Not tested in production.

(2)

AVDD = GPIOVDD = SPIVDD = 5 V. No DAC load, all DACs at 0x200 code and ADC at the fastest auto conversion rate.

8

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