Datasheet

Data Sheet AD5757
Rev. D | Page 13 of 44
Pin No. Mnemonic Description
51 CHARTC HART Input Connection for DAC Channel C.
54 I
OUT_D
Current Output Pin for DAC Channel D.
56 V
BOOST_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.
57 COMP
DCDC_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 AI
CC
Supply Requirements—Slewing sections in the Device Features section for more
information).
58 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.
59 CHARTD HART Input Connection for DAC Channel D.
61 REFIN External Reference Voltage Input.
62 REFOUT Internal Reference Voltage Output. It is recommended to place a 0.1 µF capacitor between REFOUT and
REFGND.
REFOUT must be connected to REFIN to use the internal reference.
63 R
SET_D
An external, precision, low drift 15 kΩ current setting resistor can be connected to this pin to improve the I
OUT_D
temperature drift performance. See the Device Features section.
64 R
SET_C
An external, precision, low drift 15 kΩ current setting resistor can be connected to this pin to improve the I
OUT_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.