AMC7891_15 Datasheet, PDF(3/41 Page) Texas Instruments – Analog Monitor and Control Circuit with 10-Bit, Multi-Channel ADC and Four DACs, Temperature Sensor, and 12 GPIOs

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AMC7891_15 Datasheet, PDF (3/41 Pages) Texas Instruments – Analog Monitor and Control Circuit with 10-Bit, Multi-Channel ADC and Four DACs, Temperature Sensor, and 12 GPIOs

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AMC7891

www.ti.com

SBAS518A â AUGUST 2011 â REVISED DECEMBER 2011

AMC7891 Pin Functions (continued)

I/O

NO.

NAME

DESCRIPTION

11 DACOUT2 O DAC2 buffered output. (0 V to AVDD).

Can source/sink up to 10 mA.

12 DACOUT1 O DAC1 buffered output. (0 V to AVDD).

Can source/sink up to 10 mA.

13 DACOUT0 O DAC0 buffered output. (0 V to AVDD).

Can source/sink up to 10 mA.

14 AGND2

I Analog ground. Ground reference point for all analog circuitry on the device, AGND. Connect AGND1 and

AGND2 to the same potential, AGND.

15 GPIOC3

16 GPIOC2

17 GPIOC1

18 GPIOC0

19 DAV

I/O General purpose digital I/O C3. Maximum voltage is set by GPIOVDD

I/O General purpose digital I/O C2. Maximum voltage is set by GPIOVDD

I/O General purpose digital I/O C1. Maximum voltage is set by GPIOVDD

I/O General purpose digital I/O C0. Maximum voltage is set by GPIOVDD

O ADC data available indicator. Open-drain, active low output.

In direct-mode, DAV goes low when an ADC conversion cycle finishes. In auto-mode a 1Âµs pulse appears

on this pin when the conversion cycle finishes (see ADC Operation for details). DAV stays high when

deactivated. If used, an external 10 kÎ© pull-up resistor to GPIOVDD is required. If unused, the pin can be

connected to DGND.

20 GPIOB3

21 GPIOB2

22 GPIOB1

23 GPIOB0

24 GPIOA3

25 GPIOA2

26 GPIOA1

27 GPIOA0

28 AIN0

I/O General purpose digital I/O B3. Maximum voltage is set by GPIOVDD

I/O General purpose digital I/O B2. Maximum voltage is set by GPIOVDD

I/O General purpose digital I/O B1. Maximum voltage is set by GPIOVDD

I/O General purpose digital I/O A3. Maximum voltage is set by GPIOVDD

I/O General purpose digital I/O A2. Maximum voltage is set by GPIOVDD

I/O General purpose digital I/O A1. Maximum voltage is set by GPIOVDD

I Uncommitted analog input 0. (0 V to 5 V)

29 AIN1

I Uncommitted analog input 1. (0 V to 5 V)

30 AIN2

I Uncommitted analog input 2. (0 V to 5 V)

31 AIN3

I Uncommitted analog input 3. (0 V to 5 V)

32 AIN4

I Uncommitted analog input 4. (0 V to 5 V)

33 AIN5

I Uncommitted analog input 5. (0 V to 5 V)

34 AIN6

I Uncommitted analog input 6. (0 V to 5 V)

35 AIN7

I Uncommitted analog input 7. (0 V to 5 V)

36 REF

I/O Used as external ADC reference input when the internal reference buffer is disabled in register AMC_power,

ref_on = â0â (default). A decoupling capacitor is recommended between the external reference output an

AGND for noise filtering.

Used as internal reference output when the internal reference buffer is enabled in register AMC_power,

ref_on = â1â. Requires a 4.7 ÂµF decoupling capacitor to AGND when used as reference output. An external

buffer amplifier with high impedance input is required to drive an external load.

â THERMAL â The thermal pad is located on the package underside. Connect to the board ground plane using multiple

PAD

vias.

Product Folder Link(s): AMC7891

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