DAC8750IPWPR datasheet(4/53 Pages) TI1

4 / 53 page

DAC7750, DAC8750

SBAS538B – DECEMBER 2013 – REVISED JUNE 2016

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Pin Functions

I/O

DESCRIPTION

NAME

VQFN

HTSSOP

ALARM

Digital output

Alarm terminal. Open drain output. External pull-up resistor required

(10 kΩ). The terminal goes low (active) when the ALARM condition is

detected (open circuit/over temperature/timeout, and so forth).

AVDD

Supply input

Positive analog power supply.

BOOST

Analog output

Boost terminal. External transistor connection (optional).

CAP1

Analog input

Connection for output filtering capacitor (optional).

CAP2

Analog input

Connection for output filtering capacitor (optional).

CLR

Digital input

Clear input. Logic high on this terminal causes the part to enter CLEAR

state. Active high.

DIN

Digital input

Serial data input. Data are clocked into the 24-bit input shift register on the

rising edge of the serial clock input. Schmitt-Trigger logic input.

DVDD

Supply input

or output

Digital power supply. Can be input or output, depending on DVDD-EN

terminal.

DVDD-EN

Digital input

Internal power-supply enable terminal. Connect this terminal to GND to

disable the internal supply, or leave this terminal unconnected to enable the

internal supply. When this terminal is connected to GND, an external supply

must be connected to the DVDD terminal.

GND

12, 13, 14,

15, 37

1, 11, 12

Supply input

Ground reference point for all analog circuitry of the device.

GND

3, 4

4, 5

Supply input

Ground reference point for all digital circuitry of the device.

HART-IN

Analog input

Input terminal for HART modulation.

IOUT

Analog output

Current output terminal

ISET-R

Analog input

Connection terminal for external precision resistor (15 kΩ). See Detailed

Description of this data sheet.

LATCH

Digital input

Load DAC registers input. A rising edge on this terminal loads the input shift

output.

1, 10, 11,

19, 20, 21,

22, 30, 31,

32, 33, 34,

35, 38, 40

—

No connection.

R3-SENSE

Analog output

This terminal is used as a monitoring feature for the output current. The

voltage measured between the R3-SENSE terminal and the BOOST

terminal is directly proportional to the output current.

REFOUT

Analog output

Internal reference output. Connects to REFIN when using internal

reference.

REFIN

Analog input

Reference input

SCLK

Digital input

Serial clock input of the SPI. Data can be transferred at rates up to 30 MHz.

Schmitt-Trigger logic input.

SDO

Digital output

Serial data output. Data are valid on the rising edge of SCLK.

Thermal Pad

—

Supply input

The thermal pad is internally connected to GND. It is recommended that the

pad be thermally connected to a copper plane for enhanced thermal

performance. The pad can be electrically connected to the same potential

as the GND terminal or left electrically unconnected provided a supply

connection is made at the GND terminal.

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