AD5757 datasheet(12/44 Pages) AD

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AD5757

Rev. A | Page 12 of 44

Pin No.

Mnemonic

Description

CHARTC

HART Input Connection for DAC Channel C.

IOUT_D

Current Output Pin for DAC Channel D.

VBOOST_D

Supply for Channel D Current Output Stage (see Figure 49). To use the dc-to-dc feature of the device, connect as

shown in Figure 56.

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 (see the DC-to-DC Converter Compensation

Capacitors and AICC Supply Requirements—Slewing sections in the Device Features section for more

information).

IGATED

Optional Connection for External Pass Transistor. Should be left unconnected when using the dc-to-dc converter.

See the External PMOS Mode section for more information.

CHARTD

HART Input Connection for DAC Channel D.

REFIN

External Reference Voltage Input.

REFOUT

Internal Reference Voltage Output. It is recommended to place a 0.1 μF capacitor between REFOUT and

REFGND.

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. See the Device Features 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. See the Device Features section.

EPAD

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

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

performance.

AD5757 Datasheet(PDF) 12 Page - Analog Devices