DAC7750IPWPR.B datasheet(4/56 Pages) TI2

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Table 6-1. Pin Functions

TYPE

DESCRIPTION

NAME

RHA

(VQFN)

PWP

(HTSSOP)

ALARM

Digital output

Alarm pin. Open drain output. External pullup resistor required (10 kΩ). The

pin goes low (active) when the ALARM condition is detected (open circuit,

over temperature, timeout, and so on).

AVDD

Supply input

Positive analog power supply.

BOOST

Analog output

Boost pin. 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 pin 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 pin.

DVDD-EN

Digital input

Internal power-supply enable pin. Connect this pin to GND to disable the

internal supply, or leave this pin unconnected to enable the internal supply.

When this pin is connected to GND, an external supply must be connected

to the DVDD pin.

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 pin for HART modulation.

IOUT

Analog output

Current output pin

ISET-R

Analog input

Connection pin for external precision resistor (15 kΩ). See Section 8 of this

data sheet.

LATCH

Digital input

Load DAC registers input. A rising edge on this pin 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 pin is used as a monitoring feature for the output current. The voltage

measured between the R3-SENSE pin and the BOOST pin 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. For enhanced thermal

performance, thermally connect the pad to a copper plane. The pad can

be electrically connected to the same potential as the GND pin or left

electrically unconnected provided a supply connection is made at the GND

pin.

DAC7750, DAC8750

SBAS538D – DECEMBER 2013 – REVISED DECEMBER 2021

www.ti.com

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