Datasheet

Data Sheet AD5735
Rev. C | Page 13 of 48
Pin No. Mnemonic Description
14 CLEAR
Active High, Edge Sensitive Input. When this pin is asserted, the output current and voltage are set to the
programmed clear code bit setting. Only channels enabled to be cleared are cleared. For more information, see
the Asynchronous Clear section. When CLEAR is active, the DAC output register cannot be written to.
15 ALERT
Active High Output. This pin is asserted when there is no SPI activity on the interface pins for a preset time. For
more information, see the Alert Output section.
16
FAULT
Active Low, Open-Drain Output. This pin is asserted low when any of the following conditions is detected:
open circuit in current mode; short circuit in voltage mode; PEC error; or an overtemperature condition (see
the Fault Output section).
17 POC
Power-On Condition. This pin determines the power-on condition and is read during power-on and after a
device reset. If POC = 0, the device is powered up with the voltage and current channels in tristate mode. If
POC = 1, the device is powered up with a 30 kΩ pull-down resistor to ground on the voltage output channel,
and the current channel is in tristate mode.
18
RESET
Hardware Reset, Active Low Input.
19 AV
DD
Positive Analog Supply Pin. The voltage range is from 9 V to 33 V.
20 COMP
LV_A
Optional Compensation Capacitor Connection for V
OUT_A
Output Buffer. Connecting a 220 pF capacitor
between this pin and the V
OUT_A
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.
21 −V
SENSE_A
Sense Connection for the Negative Voltage Output Load Connection for V
OUT_A
. This pin must stay within
±3.0 V of AGND for specified operation.
22 +V
SENSE_A
Sense Connection for the Positive Voltage Output Load Connection for V
OUT_A
. The difference in voltage
between this pin and the V
OUT_A
pin is added directly to the headroom requirement.
23 COMP
DCDC_A
DC-to-DC Compensation Capacitor. Connect a 10 nF capacitor from this pin to ground. Used to regulate the
feedback loop of the Channel A 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.
24 V
BOOST_A
Supply for Channel A Current Output Stage (see Figure 71). This pin is also the supply for the V
OUT_A
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.
25 V
OUT_A
Buffered Analog Output Voltage for DAC Channel A.
26 I
OUT_A
Current Output Pin for DAC Channel A.
27 AV
SS
Negative Analog Supply Pin. The voltage range is from −10.8 V to −26.4 V.
28 COMP
LV_B
Optional Compensation Capacitor Connection for V
OUT_B
Output Buffer. Connecting a 220 pF capacitor
between this pin and the V
OUT_B
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.
29 −V
SENSE_B
Sense Connection for the Negative Voltage Output Load Connection for V
OUT_B
. This pin must stay within
±3.0 V of AGND for specified operation.
30 +V
SENSE_B
Sense Connection for the Positive Voltage Output Load Connection for V
OUT_B
. The difference in voltage
between this pin and the V
OUT_B
pin is added directly to the headroom requirement.
31 V
OUT_B
Buffered Analog Output Voltage for DAC Channel B.
32 COMP
DCDC_B
DC-to-DC Compensation Capacitor. Connect a 10 nF capacitor from this pin to ground. Used to regulate the
feedback loop of the Channel B 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.
33 I
OUT_B
Current Output Pin for DAC Channel B.
34 V
BOOST_B
Supply for Channel B Current Output Stage (see Figure 71). This pin is also the supply for the V
OUT_B
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.
35 AGND Ground Reference Point for Analog Circuitry. This pin must be connected to 0 V.
36 SW
B
Switching Output for Channel B DC-to-DC Circuitry. To use the dc-to-dc converter, connect this pin as
shown in Figure 77.
37 GNDSW
B
Ground Connection for DC-to-DC Switching Circuit. This pin should always be connected to ground.
38 GNDSW
A
Ground Connection for DC-to-DC Switching Circuit. This pin should always be connected to ground.
39 SW
A
Switching Output for Channel A DC-to-DC Circuitry. To use the dc-to-dc converter, connect this pin as
shown in Figure 77.
40 AV
SS
Negative Analog Supply Pin. The voltage range is from −10.8 V to −26.4 V.
41 SW
D
Switching Output for Channel D DC-to-DC Circuitry. To use the dc-to-dc converter, connect this pin as
shown in Figure 77.
42 GNDSW
D
Ground Connection for DC-to-DC Switching Circuit. This pin should always be connected to ground.