Datasheet

Data Sheet AD5737
Rev. C | Page 13 of 44
Pin No. Mnemonic Description
49 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.
50 NC No Connect. Do not connect to this pin.
51 CHARTC HART Input Connection for DAC Channel C. For more information, see the HART Connectivity section.
52 NC No Connect. Do not connect to this pin.
53 AGND Ground Reference Point for Analog Circuitry. This pin must be connected to 0 V.
54 I
OUT_D
Current Output Pin for DAC Channel D.
55 NC No Connect. Do not connect to this pin.
56 V
BOOST_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.
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. For more information, see the DC-to-DC
Converter Compensation Capacitors section and the
AI
CC
Supply Requirements—Slewing section.
58 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.
59 CHARTD HART Input Connection for DAC Channel D. For more information, see the HART Connectivity section.
60 NC No Connect. Do not connect to this pin.
61 REFIN External Reference Voltage Input.
62 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.
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. For more information, see the External Current Setting Resistor 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. 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.