ADP2303 datasheet(12/44 Pages) AD

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AD5737

Data Sheet

Rev. B | Page 12 of 44

Pin No.

Mnemonic

Description

IGATEC

Optional Connection for External Pass Transistor. Leave this pin unconnected when using the dc-to-dc

converter. For more information, see the External PMOS Mode section.

No Connect. Do not connect to this pin.

CHARTC

HART Input Connection for DAC Channel C. For more information, see the HART Connectivity section.

No Connect. Do not connect to this pin.

AGND

Ground Reference Point for Analog Circuitry. This pin must be connected to 0 V.

IOUT_D

Current Output Pin for DAC Channel D.

No Connect. Do not connect to this pin.

VBOOST_D

Supply for Channel D Current Output Stage (see Figure 48). To use the dc-to-dc converter, connect this pin

as shown in Figure 55.

COMPDCDC_D

DC-to-DC Compensation Capacitor. Connect a 10 nF capacitor from this pin to ground. Used to regulate the

feedback loop of the Channel D dc-to-dc converter. Alternatively, if using an external compensation resistor,

place a resistor in series with a capacitor to ground from this pin. For more information, see the DC-to-DC

Converter Compensation Capacitors section and the AICC Supply Requirements—Slewing section.

IGATED

Optional Connection for External Pass Transistor. Leave this pin unconnected when using the dc-to-dc

converter. For more information, see the External PMOS Mode section.

CHARTD

HART Input Connection for DAC Channel D. For more information, see the HART Connectivity section.

No Connect. Do not connect to this pin.

REFIN

External Reference Voltage Input.

REFOUT

Internal Reference Voltage Output. It is recommended that a 0.1 µF capacitor be placed between REFOUT

and REFGND.

REFOUT must be connected to REFIN to use the internal reference.

RSET_D

An external, precision, low drift, 15 kΩ current setting resistor can be connected to this pin to improve the

IOUT_D temperature drift performance. For more information, see the External Current Setting Resistor section.

RSET_C

An external, precision, low drift, 15 kΩ current setting resistor can be connected to this pin to improve the

IOUT_C temperature drift performance. For more information, see the External Current Setting Resistor section.

EPAD

Exposed Pad. The exposed paddle should be connected to AGND, or, alternatively, it can be left electrically

unconnected. It is recommended that the paddle be thermally connected to a copper plane for enhanced

thermal performance.

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