Datasheet

AD5735 Data Sheet
Rev. C | Page 14 of 48
Pin No. Mnemonic Description
43 GNDSW
C
Ground Connection for DC-to-DC Switching Circuit. This pin should always be connected to ground.
44 SW
C
Switching Output for Channel C DC-to-DC Circuitry. To use the dc-to-dc converter, connect this pin as
shown in Figure 77.
45 AV
CC
Supply for DC-to-DC Circuitry. The voltage range is from 4.5 V to 5.5 V.
46 V
BOOST_C
Supply for Channel C Current Output Stage (see Figure 71). This pin is also the supply for the V
OUT_C
stage,
which is regulated to 15 V by the dc-to-dc converter. To use the dc-to-dc converter, connect this pin as
shown in Figure 77.
47 I
OUT_C
Current Output Pin for DAC Channel C.
48 COMP
DCDC_C
DC-to-DC Compensation Capacitor. Connect a 10 nF capacitor from this pin to ground. Used to regulate the
feedback loop of the Channel C 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.
49 V
OUT_C
Buffered Analog Output Voltage for DAC Channel C.
50 +V
SENSE_C
Sense Connection for the Positive Voltage Output Load Connection for V
OUT_C
. The difference in voltage
between this pin and the V
OUT_C
pin is added directly to the headroom requirement.
51 −V
SENSE_C
Sense Connection for the Negative Voltage Output Load Connection for V
OUT_C
. This pin must stay within
±3.0 V of AGND for specified operation.
52 COMP
LV_C
Optional Compensation Capacitor Connection for V
OUT_C
Output Buffer. Connecting a 220 pF capacitor
between this pin and the V
OUT_C
pin allows the voltage output to drive up to 2 μF. Note that the addition
of this capacitor reduces the bandwidth of the output amplifier, increasing the settling time.
53 AV
SS
Negative Analog Supply Pin. The voltage range is from −10.8 V to −26.4 V.
54 I
OUT_D
Current Output Pin for DAC Channel D.
55 V
OUT_D
Buffered Analog Output Voltage for DAC Channel D.
56 V
BOOST_D
Supply for Channel D Current Output Stage (see Figure 71). This pin is also the supply for the V
OUT_D
stage,
which is regulated to 15 V by the dc-to-dc converter. To use the dc-to-dc converter, connect this pin as
shown in Figure 77.
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 +V
SENSE_D
Sense Connection for the Positive Voltage Output Load Connection for V
OUT_D
. The difference in voltage
between this pin and the V
OUT_D
pin is added directly to the headroom requirement.
59 −V
SENSE_D
Sense Connection for the Negative Voltage Output Load Connection for V
OUT_D
. This pin must stay within
±3.0 V of AGND for specified operation.
60 COMP
LV_D
Optional Compensation Capacitor Connection for V
OUT_D
Output Buffer. Connecting a 220 pF capacitor
between this pin and the V
OUT_D
pin allows the voltage output to drive up to 2 μF. Note that the addition
of this capacitor reduces the bandwidth of the output amplifier, increasing the settling time.
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.
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 the potential of the AV
SS
pin, 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.