AD5755 datasheet(13/48 Pages) AD

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AD5755

Rev. 0 | Page 13 of 48

Pin No.

Mnemonic

Description

ALERT

Active High Output. This pin is asserted when there has been no SPI activity on the interface pins for a

predetermined time. See the Device Features section for more information.

FAULT

Active Low Output. This pin is asserted low when an open circuit in current mode is detected, a short circuit in

voltage mode is detected, a PEC error is detected, or an overtemperature is detected (see the Device Features

section). Open-drain output.

POC

Power-On Condition. This pin determines the power-on condition and is read during power-on or, alternatively,

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.

RESET

Hardware Reset, Active Low Input.

AVDD

Positive Analog Supply. The voltage range is from 9 V to 33 V.

COMPLV_A

Optional Compensation Capacitor Connection for VOUT_A Output Buffer. Connecting a 220 pF capacitor between

this pin and the VOUT_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.

−VSENSE_A

Sense Connection for the Negative Voltage Output Load Connection for VOUT_A. This pin must stay within ±3.0 V

of AGND for specified operation.

+VSENSE_A

Sense Connection for the Positive Voltage Output Load Connection for VOUT_A.

COMPDCDC_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 (see the DC-to-DC Converter Compensation

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

information).

VBOOST_A

Supply for Channel A Current Output Stage (see Figure 72). This is also the supply for the VOUT_x stage, which is

regulated to 15 V by the dc-to-dc converter. To use the dc-to-dc feature of the device, connect as shown in

Figure 78.

VOUT_A

Buffered Analog Output Voltage for DAC Channel A.

IOUT_A

Current Output Pin for DAC Channel A.

AVSS

Negative Analog Supply Pin. Voltage range is from −10.8 V to −26.4 V.

COMPLV_B

Optional Compensation Capacitor Connection for VOUT_B Output Buffer. Connecting a 220 pF capacitor between

this pin and the VOUT_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.

−VSENSE_B

Sense Connection for the Negative Voltage Output Load Connection for VOUT_B. This pin must stay within ±3.0 V

of AGND for specified operation.

+VSENSE_B

Sense Connection for the Positive Voltage Output Load Connection for VOUT_B.

VOUT_B

Buffered Analog Output Voltage for DAC Channel B.

COMPDCDC_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 (see the DC-to-DC Converter Compensation

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

information).

IOUT_B

Current Output Pin for DAC Channel B.

VBOOST_B

Supply for Channel B Current Output Stage (see Figure 72). This is also the supply for the VOUT_x stage, which is

regulated to 15 V by the dc-to-dc converter. To use the dc-to-dc feature of the device, connect as shown in

Figure 78.

AGND

Ground Reference Point for Analog Circuitry. This must be connected to 0 V.

SWB

Switching Output for Channel B DC-to-DC Circuitry. To use the dc-to-dc feature of the device, connect as shown

in Figure 78.

GNDSWB

Ground Connection for DC-to-DC Switching Circuit. This pin should always be connected to ground.

GNDSWA

Ground Connection for DC-to-DC Switching Circuit. This pin should always be connected to ground.

SWA

Switching Output for Channel A DC-to-DC Circuitry. To use the dc-to-dc feature of the device, connect as shown

in Figure 78.

AVSS

Negative Analog Supply Pin. The voltage range is from −10.8 V to −26.4 V. This pin can be connected to 0 V if

using the device in unipolar supply mode.

SWD

Switching Output for Channel D DC-to-DC Circuitry. To use the dc-to-dc feature of the device, connect as shown

in Figure 78.

GNDSWD

Ground Connections for DC-to-DC Switching Circuit. This pin should always be connected to ground.

GNDSWC

Ground Connections for DC-to-DC Switching Circuit. This pin should always be connected to ground.

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